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ORDER NO. KM40606102CE

Telephone Equipment

KX-TG7120FXS KX-TG7120FXT KX-TGA711FXS KX-TGA711FXT
Digital Cordless Answering System
Silver Version Titanium Black Version (for Central Europe)

2006 Panasonic Communications Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.

KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

TABLE OF CONTENTS
PAGE 1 Safety Precaution ------------------------------------------------ 4 1.1. For Service Technicians --------------------------------- 4 2 Warning -------------------------------------------------------------- 4 2.1. Battery Caution--------------------------------------------- 4 2.2. About Lead Free Solder (Pbf: Pb free)--------------- 4 3 Specifications ----------------------------------------------------- 6 4 Technical Descriptions ----------------------------------------- 7 4.1. Block Diagram (Base Unit) ------------------------------ 7 4.2. Circuit Operation (Base Unit) --------------------------- 8 4.3. Block Diagram (Handset)------------------------------- 11 4.4. Circuit Operation (Handset)----------------------------12 4.5. Circuit Operation (Charger Unit) ----------------------13 4.6. Signal Route -----------------------------------------------14 5 Location of Controls and Components ------------------16 5.1. Controls -----------------------------------------------------16 6 Installation Instructions ---------------------------------------16 6.1. Connections------------------------------------------------16 6.2. Battery-------------------------------------------------------17 7 Operation Instructions-----------------------------------------19 7.1. Base Unit Settings----------------------------------------19 7.2. Handset Settings -----------------------------------------20 7.3. Registering a Handset to the Base Unit ------------21 7.4. For Service Hint-------------------------------------------22 8 Service Mode -----------------------------------------------------23 8.1. Engineering Mode ----------------------------------------23 9 Troubleshooting Guide ----------------------------------------27 9.1. Troubleshooting Flowchart -----------------------------27 9.2. Troubleshooting by Symptom (Base Unit and Charger Unit) ----------------------------------------------36 9.3. Troubleshooting by Symptom (Handset) -----------40 9.4. How to Replace the Flat Package IC ----------------43 9.5. How to Replace the LLP (Leadless Leadframe Package) IC------------------------------------------------45 10 Disassembly and Assembly Instructions ---------------47 10.1. Disassembly Instructions -------------------------------47 10.2. How to Replace the Handset LCD -------------------50 11 Measurements and Adjustments---------------------------51 11.1. The Setting Method of JIG (Base Unit) -------------51 11.2. Adjustment Standard (Base Unit)---------------------53 11.3. Adjustment Standard (Charger Unit)-----------------54 11.4. The Setting Method of JIG (Handset) ---------------55 11.5. Adjustment Standard (Handset) ----------------------57 11.6. Things to Do after Replacing IC ----------------------58 11.7. RF Specification-------------------------------------------59 11.8. How to Check the Handset Speaker of Receiver ----------------------------------------------------60 11.9. Frequency Table (MHz) ---------------------------------60 12 Schematic Diagram ---------------------------------------------61 12.1. For Schematic Diagram---------------------------------61 12.2. Schematic Diagram (Base Unit_Main) --------------62 12.3. Schematic Diagram (Base Unit_Operation) -------64 12.4. Schematic Diagram (Handset) ------------------------66 12.5. Schematic Diagram (Charger Unit) ------------------68 13 Printed Circuit Board-------------------------------------------69 13.1. Circuit Board (Base Unit_Main) -----------------------69 13.2. Circuit Board (Base Unit_Operation) ----------------71 13.3. Circuit Board (Handset) ---------------------------------73 13.4. Circuit Board (Charger Unit) ---------------------------75 PAGE 14 Appendix Information of Schematic Diagram --------- 76 14.1. CPU Data (Base Unit) ---------------------------------- 76 14.2. CPU Data (Handset) ------------------------------------ 78 14.3. Terminal Guide of the ICs, Transistors and Diodes ------------------------------------------------------ 80 15 Exploded View and Replacement Parts List ----------- 81 15.1. Cabinet and Electric Parts (Base Unit) ------------- 81 15.2. Cabinet and Electric Parts (Handset) --------------- 82 15.3. Cabinet and Electric Parts (Charger Unit) --------- 83 15.4. Accessories and Packing Materials ----------------- 84 15.5. Replacement Part List ---------------------------------- 86

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

1 Safety Precaution
1.1. For Service Technicians
ICs and LSIs are vulnerable to static electricity. When repairing, the following precautions will help prevent recurring malfunctions. 1. Cover the plastic parts boxes with aluminum foil and ground them. 2. Ground the soldering irons. 3. Use a conductive mat on the worktable. 4. Do not touch IC or LSI pins with bare fingers.

2 Warning
2.1. Battery Caution
1. Danger of explosion if battery is incorrectly replaced. 2. Replace only with the same or equivalent type recommended by the manufacturer. 3. Dispose of used batteries according to the manufacture's Instructions.

2.2.

About Lead Free Solder (Pbf: Pb free)

Note: In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that contains lead. We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin (Sn), Silver (Ag), and Copper (Cu). This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair work we suggest using the same type of solder. Caution PbF solder has a melting point that is 50 F ~ 70 F (30 C ~ 40 C) higher than Pb solder. Please use a soldering iron with temperature control and adjust it to 700 F 20 F (370 C 10 C). Exercise care while using higher temperature soldering irons.: Do not heat the PCB for too long time in order to prevent solder splash or damage to the PCB. PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100 F (600 C). When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the opposite side (See the figure below).

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

2.2.1.

Suggested PbF Solder

There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper (Sn+Ag+Cu), you can also use Tin and Copper (Sn+Cu) or Tin, Zinc, and Bismuth (Sn+Zn+Bi). Please check the manufacturer's specific instructions for the melting points of their products and any precautions for using their product with other materials. The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3 mm, 0.6 mm and 1.0 mm.

2.2.2.

How to Recognize that Pb Free Solder is Used
Marked

(Example: Handset P.C.B.)

32 1

27 26

60 61

41 40
C26 C39

PbF
1 8

IC3
4 5

IC1

IC4
80 1 21 20

10 17 11 16

A

(Component View)

Note: The location of the "PbF" mark is subject to change without notice.

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3 Specifications

Note: Specifications are subject to change. Connections: The unit will not work during a power failure. We recommend you connect a standard telephone on the same line for power protection. Note for Service: Operation range: Up to 300 m outdoors, Up to 50 m indoors Analog telephone connection: Telephone Line

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4.1.

To TEL_LINE CN1 Audio
A/D

Off-Hook Line Voltage 64 ADCO 59 54
D/A

Speech Decoding Burst Decoding Burst Encoding Speech Encoding

18 TXDA 18 16 31 19 RXDA

ANT1 ANT2

A B Analog Switch 61 DSP BMC ADPCM Codec Filter RF Interface Analog Front End 15 20 21 22 RSSI SYCL SYDA SYEN

Bridge Rect D3

Hook Switch Q4,Q5

HOOK

2 8 14 21 13 12 IC10 RF Module

Bell/Caller ID Interface 55 BELL SCL CPU BBIC IC7 SDA 5 13 6 12

Block Diagram (Base Unit)

52 60 56

4 Technical Descriptions

XTAL X1 10.368 MHz

EEPROM IC5

7
39 40 38 36 37 62 RESET CS SCK SI SO CS 9 10 11 23 TAM Companion IC
IC8

To AC Adaptor

Limit Resistor

CHARGE CONTACT

VUNREG

CN2

3.3V IC1 Reg. 10 FLASH 11 MEMORY 12 (TAM) 13 IC9 14

3.3V

2.5V Q9 Reg. 2.5V

1.8V Reg. Q8 1.8V

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KX-TG7120 BLOCK DIAGRAM (BASE UNIT)

KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

4.2.
4.2.1.

Circuit Operation (Base Unit)
Outline

Base Unit consists of the following ICs as shown in Block Diagram (Base Unit) (P.7). DECT BBIC (Base Band IC): IC7 - Handling all the audio, signal and data processing needed in a DECT base unit - Controlling the DECT specific physical layer and radio section (Burst Module Controller section) - ADPCM code filter for speech encoding and speech decoding (DSP section) - Echo-cancellation and Echo-suppression (DSP section) - Any tones (tone, sidetone, ringing tone, etc.) generation (DSP section) - DTMF receiver (DSP section) - Clock Generation for RF Module - ADC, DAC, timer, and power control circuitry - All interfaces (ex: RF module, EEPROM, LED, Analog Front End, etc.) RF Module: IC10 - PLL Oscillator - Detector - Compress/Expander - First Mixer - Amplifier for transmission and reception EEPROM: IC5 - Temporary operating parameters (for RF, etc.) FLASH MEMORY: IC9 - Voice Prompt (TAM) D/L Area - ICM/OGM/MEMO Recording Area TAM Companion: IC8 - Voice data compression and decompression - Speaker Amp - LED Driver Additionally, - Power Supply Circuit (+3.3 V, +2.5 V, +1.8 V output) - Crystal Circuit (10.368 MHz) - Charge Circuit - Telephone Line Interface Circuit

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4.2.2.


Power Supply Circuit







The power is supplied to the DECT BBIC, RF Module, EEPROM and Charge Contact from AC Adaptor (+6.5 V) as shown in Fig.101. The power supply is as follows; DECT BBIC (IC7): CN2 (+6.5 V) IC1 Q9 IC7 CN2 (+6.5 V) IC1 Q8 IC7 RF Module (IC10): CN2 (+6.5 V) IC1 Q9 IC10 (PLL) CN2 (+6.5 V) IC1 Q10 IC10 (Power AMP) EEPROM (IC5): CN2 (+6.5 V) IC1 Q9 IC5 FLASH MEMORY (IC9): CN2 (+6.5 V) IC1 IC9 TAM Companion (IC8): CN2 (+6.5 V) IC1 Q9 IC8 CN2 (+6.5 V) IC1 Q8 IC8 Charge Contact (TP16): CN2 (+6.5 V) R55, R56 TP16



4.2.3.

Telephone Line Interface

Bell signal detection Clip signal detection ON/OFF hook circuit Bell & Clip (: Calling Line Identification Presentation: Caller ID) signal detection: In the standby mode, Q3 is open to cut the DC loop current and decrease the ring load. When ring voltage appears at the L1T (A) and L1R (B) leads (when the telephone rings), the AC ring voltage is transferred as follows; A C4 R6 R33 IC7 Pin 60 (CID INp) B C3 R4 R35 IC7 Pin 52 (CID INn) ON/OFF hook circuit: In the standby mode, Q3 is open, and connected as to cut the DC loop current and to cut the voice signal. The unit is consequently in an on-hook condition. When IC7 detects a ring signal or press the TALK Key onto the handset, Q4 turns on and then Q3 turns on, thus providing an off-hook condition (DC current flows through the circuit) and the following signal flow makes the loop current. A D3 Q3 Q5 R21 R22 D3 B [OFF HOOK]

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

4.2.4.

Transmitter/Receiver

Audio Circuits and DTMF tone signal circuits. Base Unit and Handset mainly consist of RF Module and DECT BBIC. Base Unit and Handset transmit/receive voice signal and data signal through the antenna on carrier frequency. Signal Path: *Refer to Signal Route (P.14).

4.2.4.1.

Transmitter Block

The voice signal input from the TEL LINE interface goes to RF Module (IC10) through DECT BBIC (IC7) as shown in Block Diagram (Base Unit) (P.7) The voice signal passes through the analog part of IC7 where it is amplified and converted to a digital audio stream signal. The burst switch controller processes this stream performing encryption and scrambling, adding the various other fields to produce the GAP (Generic Access Profile) standard DECT frame, assigning to a time slot and channel etc. In IC10, the carrier frequency is changing, and frequency modulated RF signal is generated and amplified, and radiated from antenna. Handset detects the voice signal or data signal in the circuit same as the following explanation of Receiver Block.

4.2.4.2.

Receiver Block

The signal of 1900 MHz band (1881.792 MHz ~ 1897.344 MHz) which is input from antenna is input to IC10 as shown in Block Diagram (Base Unit) (P.7). In IC10, the signal of 1900 MHz band is downconverted to 864 kHz signal and demodulated, and goes to IC7 as GAP (Generic Access Profile) standard DECT frames. It passes through the decoding section burst switch controller where it separates out the frame information and performs de-encryption and de-scrambling as required. It then goes to the DSP section where it is turned back into analog audio. This is amplified by the analog front end, and goes to the TEL LINE Interface.

4.2.5.
on Q2.

Pulse Dialing

During pulse dialing the hookswitch (Q3,Q4) is used to generate the pulses using the HOOK control signal, which is set high during pulses. To force the line impedance low during the "pause" intervals between dial pulses, the PULSE_DIAL signal turns

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

4.3.

Block Diagram (Handset)

30 SPEAKER RECEIVER MIC 32 66 67 72
Speech Decoding Speech Encoding Burst Decoding Burst Encoding

23 22 19 25 26 24

RXDA TXDA RSSI SYDA SYEN SYCL RF Module

D/A A/D

Analog Front End CHARGE(+) CHARGE CHARGE CIRCUIT CONTACTS Q4,Q5,Q9
R7

ADPCM Codec Filter DSP

RF Interface BMC

IC4

CHARGE

62

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XTAL X1 10.368 MHz BATTERY ON SWITCH

CHARGE DETECT 52 EEPROM SCL 45 SDA 44 VBAT1 58 17

CHARGE(-) D7 J1 BATTERY TERMINAL J2 SWITCHED SUPPLY Q1

IC3

61

DC/DC-SWITCH 56 2.5V 2.5V Q3 59 1.8V 60 1.8V Q2 RS 11 77 6 9 10 7 75 46 BBIC
IC1

4.0V

CPU

1,12,40,76

ROWS

KEYPAD 27,28,34,35,36,74 COLUMNS

LCD

RESET CS SI SCL

LCD-BACK LIGHT KEY-BACK LIGHT Ringer LED

KX-TGA711 BLOCK DIAGRAM (HANDSET)

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4.4.
4.4.1.

Circuit Operation (Handset)
Outline

Handset consists of the following ICs as shown in Block Diagram (Handset) (P.11). DECT BBIC (Base Band IC): IC1 - All data signals (forming/analyzing ACK or CMD signal) - All interfaces (ex: Key, Detector Circuit, Charge, DC/DC Converter, EEPROM, LCD) RF Module: IC4 - PLL Oscillator - Detector - Compress/Expander - Amplifier for transmission and reception EEPROM: IC3 - Temporary operating parameters (for RF, etc.)

4.4.2.

Power Supply Circuit/Reset Circuit

Circuit Operation: When power on the Handset, the voltage is as follows; BATTERY(2.2 V ~ 2.6 V: J1) F1, L1, D1 Q2 (1.8 V), Q3 (2.5 V), Q1 (3.3 V) The Reset signal generates IC1 (66 pin) and 1.8 V.

4.4.3.

Charge Circuit

Circuit Operation: When charging the handset on the Base Unit, the charge current is as follows; DC+(6.5 V) R55, R56 CHARGE+(Base) CHARGE+(Handset) L4 Q4 D7 F1 BATTERY+... Battery... BATTERY- R45 GND L5 CHARGE-(Handset) CHARGE-(Base) GND DC-(GND) In this way, the BBIC on Handset detects the fact that the battery is charged. The charge current is controlled by switching Q5 of Handset. Refer to Fig.101 in Power Supply Circuit (P.9).

4.4.4.

Battery Low/Power Down Detector

Circuit Operation: "Battery Low" and "Power Down" are detected by BBIC which check the voltage from battery. The detected voltage is as follows; Battery Low Battery voltage: V(Batt) 2.25 V 50 mV The BBIC detects this level and " " starts flashing. Power Down Battery voltage: V(Batt) 2.0 V 50 mV The BBIC detects this level and power down.

4.4.5.

Speakerphone

The hands-free loudspeaker at SP+ and SP- is used to generate the ring alarm.

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

4.5.
4.5.1.

Circuit Operation (Charger Unit)
Power Supply Circuit

The power supply is as shown.

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

4.6.

Signal Route

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

5 Location of Controls and Components
5.1.
5.1.1.

6 Installation Instructions
6.1. Connections
Base unit When connecting the AC adaptor to the base unit, a short beep will be heard. If it is not heard, check the connections.

Controls
Base Unit

Charger Connect the AC adaptor to the charger and route the cable as shown. The charger can be mounted on the wall, if required.

5.1.2.

Handset

Note: Never install telephone wiring during a lightning storm. The AC adaptor must remain connected at all times. (It is normal for the adaptor to feel warm during use.) The AC adaptor should be connected to a vertically oriented or floor-mounted AC outlet. Do not connect the AC adaptor to a ceiling-mounted AC outlet, as the weight of the adaptor may cause it to become disconnected. Location For maximum distance and noise-free operation, place your base unit: - away from electrical appliances such as TVs, radios, personal computers or other phones. - in a convenient, high and central location.

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

6.2.
6.2.1.

Battery
Battery Installation/Replacement

6.2.2.

Battery Charge

Important: Use only the included rechargeable batteries HHR-55AAAB or HHR-4EPT. When replacing batteries, we recommend using the Panasonic rechargeable batteries P03P.

Place the handset on the base unit or charger for about 7 hours before initial use. When charging, the battery icon is shown as follows.

When the batteries are fully charged, remains on the display. The charge indicator lights up when the handset is placed on the base unit or charger.

Notice: When inserting the batteries: Wipe the battery ends ( , ) with a dry cloth. , Install the batteries without touching the battery ends (

) or the unit contacts. I fullly charged the batteries, but the operating time seems to be short: Wipe the battery ends ( dry cloth. , ) and the unit contacts with a

Note: It is normal for the handset to feel warm during charging. If you want to use the unit immediately, charge the batteries for at least 15 minutes. Clean the charge contacts of the handset, base unit, and charger with a soft, dry cloth, otherwise the batteries may not charge properly. Clean if the unit is exposed to grease, dust or high humidity.

6.2.3.

Battery Strength

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

6.2.4.

Panasonic Ni-MH Battery Performance (included batteries)

Note: It is normal for batteries not to reach full capacity at the initial charge. Maximum battery performance is reached after a few complete cycles of charge/discharge (use). Actual battery performance depends on a combination of how often the handset is in use and how often it is not in use (standby). Battery operating time may be shortened over time depending on usage conditions and ambient temperature. Even after the handset is fully charged, the handset can be left on the base unit or charger without any ill effect on the batteries. The battery strength may not be displayed correctly after you replace the batteries. In this case, place the handset on the base unit or charger and charge for at least 7 hours.

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

7 Operation Instructions
7.1. Base Unit Settings
Use the handset to customise the base unit. When customising the base unit, the current item or setting is indicated by .

*1 Change the recall time, if necessary, depending on the requirements of your service provider/telephone company or PBX. *2 The default setting will be as follows if you select the following regional codes when changing the units region setting: CZ=100 msec. SK=100 msec. *3 If you forget your PIN, see For Service Hint (P.22). *4 If you change the PIN, please make note of your new PIN. The unit will not reveal the PIN to you. *5 The items are not shown on the display.

7.1.1.

SMS Settings

If the base unit is reset to its default settings, the following SMS-related settings will be reset. The contents of the receive and send lists will be erased.

*1 If you set the unit's region setting to "CZ" or "SK", the default setting is "On".

7.1.2.

Answering System Settings

If the base unit is reset to its default settings, the following answering systemrelated settings will be reset.

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

7.2.

Handset Settings

Cross Reference: Registering a Handset to the Base Unit (P.21) Base Unit Settings (P.19)

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

7.3.

Registering a Handset to the Base Unit

Cross Reference: For Service Hint (P.22)

7.3.1.

Cancelling a handset

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

7.4.

For Service Hint

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

8 Service Mode
8.1.
8.1.1.

Engineering Mode
Base Unit

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

Frequently Used Items (Base Unit) ex.)
Items (*3) C-ID (FSK) sensitivity C-ID (DTMF) sensitivity Address 04 72 04 80 New Data Remarks 01 (6dB up) 02 (12dB up) When hex changes from "00" to "01" or "02", gain increases by 6dB or 12dB. 50 60 (6dB up) 70 (12dB up) When hex changes from "50" to "60" or "70", gain increases by 6dB or 12dB. 00 01 (6dB up) 02 (12dB up) When hex changes from "00" to "01" or "02", gain increases by 6dB or 12dB. 0x12/0x28 19/20 (6dB up) 32/40 (12dB When hex changes from "00 0B" to "00 16" or up) "00 2C", gain increases by 6dB or 12dB. 75 Use these items in a READ-ONLY mode to confirm the contents. Careless rewriting may Given value cause serious damage to the computer system. 64 (10sec) (*4) 1E (3sec) (*5) 14 (2sec) This is time until bell stops ringing. 32 (5sec) (Unit: 100ms) 64 (10sec) 2A (40msec) 16 (20msec) This is pulse make time. (Unit:1ms) (*4) 3A (60msec) 1C(30msec) This is pulse break time. (Unit:1ms) (*4) 57 (870msec) 2C (440msec) This is inter-digit time in pulse mode. (*4) (Unit:10ms) Default Data 00

SMS (FSK) receiving sensitiv04 72 ity SMS (FSK) sending level 04 8C/04 8B Frequency ID Bell length 00 01 00 10~00 14 01 F6 03 8D 03 8E 03 5F 03 61 03 60 03 62 01 E4

PULSE Dial speed (10PPS -> 20PPS)

Note: (*1) Refer to Registering a Handset to the Base Unit (P.21) (*2) When you enter the address or New Data, please refer to the table below.
Desired Number (hex) 0 1 . . . 9 Input Keys 0 1 . . . 9 Desired Number (hex) A B C D E F Input Keys [R] + 0 [R] + 1 [R] + 2 [R] + 3 [R] + 4 [R] + 5

(*3)
Items C-ID (FSK) sensitivity C-ID (DTMF) sensitivity SMS (FSK) receiving sensitivity SMS (FSK) sending level Frequency ID Bell length PULSE Dial speed (10PPS -> 20PPS) Description FSKGain_shiftgain Foutgains:HPFilter Foutgains FSKGain_shiftgain wFskAttn:Signal Output Attenuation (DSP parameter) Setting value of FREQ_TRIM_REG ID Time until it stops bell. Pulse MakeTime and BreakTime. bMakeTime:Pulse MakeTime Unit: 1ms bBreakTime:Pulse Break Time Unit: 1ms Inter-digit time in Pulse mode. Unit:10ms

(*4)
Bell length PULSE Dial speed (10PPS -> 20PPS) 64(hex) = 100(dec) 100 100msec = 10000msec (10sec) 2A(hex) = 42(dec) (42-2) 1msec = 40msec 3A(hex) = 58(dec) (58+2) 1msec = 60msec 57(hex) = 87(dec) 87 10msec = 870msec

(*5) The new data must be entered in all three addresses (01 F6, 03 8A, 03 8B) using the same value. Ex.) If you want to change the bell length to "1E (3 sec)". 01 F6 - 1E 03 8A - 1E 03 8B - 1E

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

8.1.2.

Handset

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

Frequently Used Items (Handset) ex.)
Items (*2) Sending level Receiving level Battery Low Frequency ID Address 00 06 00 07 00 04 00 01 00 10~00 14 Default Data Adjusted value Adjusted value 25 75 Given value New Data Given value Given value Possible Adjusted Value MAX (hex) 6F 00 Possible Adjusted Value MIN (hex) 00 3F Remarks (*3) (*4) (*5)

Note: (*1) When you enter the address or New Data, please refer to the table below.
Desired Number (hex.) 0 1 . . . 9 Input Keys 0 1 . . . 9 Desired Number (hex.) A B C D E F Input Keys [R] + 0 [R] + 1 [R] + 2 [R] + 3 [R] + 4 [R] + 5

(*2)
Items Sending level Receiving level Battery Low Frequency ID Description Analog Front End MIC Setting for Handset Mode Analog Front End LSR Setting for Handset Mode ADC value for battery low detection Setting value of FREQ_TRIM_REG International Portable Part Equipment Identities

(*3) When adding "01" (hex) to default value, sending level increases by 0.25 dB. ex.)
Item Sending level Default Data 3A -8.5 dBm New Data 3E 36 -7.5 dBm -9.5 dBm

(*4) When reducing "01" (hex) from default value, receiving level increases by 0.25 dB. ex.)
Item Receiving level Default Data 14 -21 dBm New Data 18 10 -22 dBm -20 dBm

(*5) Use these items in a READ-ONLY mode to confirm the contents. Careless rewriting may cause serious damage to the handset.

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

9 Troubleshooting Guide
9.1. Troubleshooting Flowchart
Flow Chart

Cross Reference: Check Power (P.28) Bell Reception (P.35) Check Battery Charge (P.29) Check Link (P.30) Check Handset Transmission (P.34) Check Handset Reception (P.34) Signal Route (P.14) Check Caller ID (P.34) Check TAM Operation (P.35)

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

9.1.1. 9.1.1.1.

Check Power Base Unit

Is the AC Adaptor inserted into AC outlet? (*1)

Cross Reference: Power Supply Circuit (P.9)

Note: (*1) Refer to Specifications (P.6) for part number and supply voltage of AC Adaptor.

9.1.1.2.

Handset

Cross Reference: Power Supply Circuit/Reset Circuit (P.12)

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

9.1.2. 9.1.2.1.

Check Battery Charge Base Unit

Cross Reference: Charge Circuit (P.12)

9.1.2.2.

Handset

Cross Reference: Check Power (P.28) Charge Circuit (P.12)

9.1.2.3.

Charger Unit

Cross Reference: Charge Circuit (P.12)

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

9.1.3. 9.1.3.1.

Check Link Base Unit

Note: (*1) Refer to Troubleshooting by Symptom (Base Unit and Charger Unit) (P.36) Cross Reference: Check Point (Base Unit) (P.36) Power Supply Circuit (P.9)

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

Cross Reference: Check Point (Base Unit) (P.36)

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

9.1.3.2.

Handset

Note: (*1) Refer to Troubleshooting by Symptom (Handset) (P.40) Cross Reference: Check Point (Handset) (P.40) Power Supply Circuit/Reset Circuit (P.12)

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

Cross Reference: Check Point (Handset) (P.40)

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

9.1.4.

Check Handset Transmission

Cross Reference: Signal Route (P.14)

9.1.5.

Check Handset Reception

Cross Reference: How to Check the Handset Speaker or Receiver (P.60). Signal Route (P.14)

9.1.6.

Check Caller ID

Cross Reference: Signal Route (P.14)

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

9.1.7. 9.1.7.1.

Bell Reception Base Unit

9.1.7.2.

Handset

Cross Reference: Telephone Line Interface (P.9) Check Link (P.30) How to Check the Handset Speaker or Receiver (P.60)

9.1.8.

Check TAM Operation

Cross Reference: Power Supply Circuit (P.9) Note: (*1) When replacing FLASH MEMORY (IC9), TAM data need to be written to it. Refer to Base Unit of Things to Do after Replacing IC (P.58)

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

9.2.

Troubleshooting by Symptom (Base Unit and Charger Unit)

If your unit has below symptoms, follow the instructions in remedy column. Remedies depend on whether you have DECT tester (*1) or not.

Note: (*1) A general repair is possible even if you don't have the DECT tester because it is for confirming the levels, such as Acoustic level in detail. (*2) Refer to Check Point (Base Unit) (P.36)

9.2.1.

Check Point (Base Unit)

Please follow the items below when BBIC or EEPROM or FLASH is replaced. Note: After the measuring, suck up the solder of TP. *: PC Setting (P.51) is required beforehand. The connections of simulator equipments are as shown in Adjustment Standard (Base Unit) (P.53).
Items (A) 3.3 V Supply Confirmation (B) 2.5 V Supply Confirmation (C)* 1.8 V Supply Confirmation (D)* BBIC Confirmation Check Point VDD3 Procedure 1. Confirm that the voltage between test point VDD3 and GND is 3.3 V 0.2 V. Check or Replace Parts IC1, C31, C32, R38, R39, C36, C37 Q9, C70, C71 Q8, R72, D12, C68 IC7, R37, C62, C63, X1, C72, R75~R81, R62, R63 IC5, C51, R62, R63, Q14, C50, R57~R61

VDD2 VDD1 -

1. Confirm that the voltage between test point VDD2 and GND is 2.5 V 0.2 V. 1. Confirm that the voltage between test point VDD1 and GND is 1.8 V 0.1 V. 1. BBIC Confirmation (Execute the command "getchk"). 2. Confirm the returned checksum value. Connection of checksum value and program number is shown below.

(E)* EEPROM Confirmation

-

1. EEP-ROM Confirmation (Execute the command "ChkTG7120XXrevYY.bat"). XX: country code YY: revision number 2. Confirm the returned checksum value. 3. The checksum is displayed in the last output line.

Note:
(F)* BBIC Clock Adjustment CLK "XX", "YY", and "checksum" vary depending on the country version. You can find them in the batch file, PQZZ- mentioned in JIG and PC (P.51). 1. Input Command "rdeeprom 00 01 01", then you can confirm the current value. IC10, C111, 2. Adjust the frequency of CLK executing the command "setfreq xx (where xx is C112, X1, R73, the value)" so that the reading of the frequency counter is 10.368000 MHz C62, C63 10 Hz.

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Items (G)* Hookswitch Check with DC Characteristics

Check Point -

(H)* DTMF Generator Check

-

(I)* Transmitted Power Confirmation

-

(J)

Modulation Check and Adjustment

-

(K) Frequency Offset Check

-

(L)

Frequency Drift Confirmation

-

Check or Replace Parts 1. Connect CN1 (Telephone Socket) to Tel-simulator which is connected with L1, L2, Q3, R14, 600 . R15, Q4, R16, 2. Set line voltage to 48 V and line current to 40mA at off-hook condition of nor- R17, IC7, D3 mal telephone. 3. Execute the command "hookoff" 4. Confirm that the line current is 40 mA 5 mA. 5. Execute the command "hookon". 6. Confirm that the line current is less than + 0.8 mA. 1. Connect CN1 (Telephone Socket) to DTMF tester. (Road=600 ) IC7, R67, IC6, 2. Link Handset and push dial key. R116, C141, 3. Confirm DTMF character. R29, C22, C23, 4. Confirm that the high Group is -6.0 dBm ~ 2 dBm. R18~R24, 5. Confirm that the low Group is -8.5 dBm ~ 2 dBm. C14~C17, Q5, D4 Remove the Antenna before starting step from 1 to 7. IC7, IC10, L7, 1. Configure the DECT tester (CMD60) as follows; L3, L4, L6, C117, C118, Short A_1 and GND. C119, C120, Test mode: FP C124, C125, Traffic Carrier: 5 R106, R109, Traffic Slot: 4 DA1, C102, Mode: Loopback R102, R103, PMID: 00000 Q10, C110, RF LEVEL = -70dBm. C112, R111, 2. Execute the command "testmode". C126, C127, 3. Execute the command "sendchar dmv 2 2". R112 4. Check that "Signalling Status" has been set to "Locked", then press "ACCEPT RFPI". 5. Initiate connection from Dect tester ("set up connect") 6. Execute the command "ANT1". 7. Confirm that the NTP value at ANT is 20 dBm ~ 25 dBm. IC7, IC10, L7, Follow steps 1 to 6 of (I). L3, L4, L6, 7.Confirm that the B-Field Modulation is -350 ~ -400/+320 ~ +370 kHz/div using C117, C118, data type Fig31. 8.Adjust the B-Field Modulation if required. (Execute the command "readmod" C119, C120, C124, C125, and "wrtmod xx", where xx is the value.) R106, R109, DA1, C102, R102, R103, Q10, C110, C112, R111, C126, C127, R112 Follow steps 1 to 6 of (I). IC7, IC10, L7, 7.Confirm that the frequency offset is < 45 kHz. L3, L4, L6, C117, C118, C119, C120, C124, C125, R106, R109, DA1, C102, R102, R103, Q10, C110, C112, R111, C126, C127, R112 Follow steps 1 to 6 of (I). IC7, IC10, L7, 7.Confirm that the frequency drift is < 30 kHz/ms. L3, L4, L6, C117, C118, C119, C120, C124, C125, R106, R109, DA1, C102, R102, R103, Q10, C110, C112, R111, C126, C127, R112

Procedure

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Items (M) Sensitivity Receiver Confirmation

Check Point -

(N)

Timing Confirmation

-

(O)* RSSI Level Confirmation

-

(P) Power RAMP Confirmation

-

(Q)*

Audio Check

-

(R) (S)

Charging Check TAM Operation Confirmation

-

Check or Replace Parts Follow steps 1 to 6 of (I). IC7, IC10, L7, 7.Set DECT tester power to -90 dBm. L3, L4, L6, 8.Confirm that the BER is < 1000 ppm. C117, C118, C119, C120, C124, C125, R106, R109, DA1, C102, R102, R103, Q10, C110, C112, R111, C126, C127, R112 Follow steps 1 to 6 of (I). IC7, IC10, L7, 7.Confirm that the Timing accuracy is < 2.0 ppm. L3, L4, L6, C117, C118, C119, C120, C124, C125, R106, R109, DA1, C102, R102, R103, Q10, C110, C112, R111, C126, C127, R112 Follow steps 1 to 6 of (I). IC7, IC10, L7, 7.Execute the command "readrssi". L3, L4, L6, 8. Confirm that the returned value is 22 A (hex). C117, C118, C119, C120, C124, C125, R106, R109, DA1, C102, R102, R103, Q10, C110, C112, R111, C126, C127, R112 Follow steps 1 to 6 of (I). IC7, IC10, L7, 7.Confirm that Power RAMP is matching. L3, L4, L6, C117, C118, C119, C120, C124, C125, R106, R109, DA1, C102, R102, R103, Q10, C110, C112, R111, C126, C127, R112 1. Link with Handset. IC7, CN1, SA1, 2. Input -45dBm/1kHz to MIC of Handset. L1, L2, D3, Q3, Measure the Level at Line I/F and distortion level. Q4, R14, R15, 3. Confirm that the level is -8.5 dBm 2 dBm and that the distortion level is < 5% R16, R17 at TEL Line (600 Load). 4. Input -20 dBm/1 kHz to Line I/F. Measure the level at Receiver of Handset and distortion level (*Receive volume set to second position from minimum). 5. Confirm that the level is -21 dBm 2 dBm and that the distortion level is < 5% at Receiver (Volume Middle, 150 Load). 1. Connect Charge Contact 12 /2 W resistor between charge+ and charge-. R55, R56, C48, 2. Measure and confirm voltage across the resistor is 3.10 V 0.2 V. C49 1. TAM Confirmation (Execute the command "sendchar_VPI") IC8, IC9, R89, 2. Confirm the returned Value (Value is "D897FN"). R91, R92

Procedure

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

9.2.2.

Check Point (Charger Unit)
Items Check Point Procedure 1. Connect Charge Contact 12 /2 W resistor between charge+ and charge-. 2. Measure and confirm voltage across the resistor is 3.3 V 0.2 V. Check or Replace Parts R2, R1 R3, R4

(A)

Charging Check

Note: After the measuring, suck up the solder of TP. The connection of adjustment equipment is as shown in Adjustment Standard (Charger Unit) (P.54).

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

9.3.

Troubleshooting by Symptom (Handset)

If your unit has below symptoms, follow the instructions in remedy column. Remedies depend on whether you have DECT tester (*1) or not.

Note: (*1) A general repair is possible even if you don't have the DECT tester because it is for confirming the levels, such as Acoustic level in detail. (*2) Refer to Check Point (Handset) (P.40)

9.3.1.

Check Point (Handset)

Please follow the items below when BBIC or EEPROM is replaced. Note: After the measuring, suck up the solder of TP. *: Batch file Settings (P.56) is required beforehand. The connections of adjustment equipments are as shown in Adjustment Standard (Handset) (P.57).
Items (A)* 1.8 V Supply Adjustment Check Point VDD1 Procedure 1. Confirm that the voltage between test point VDD1 and GND is 1.8 V 0.02 V. 2. Execute the command "bandgap", then check the current value. 3. Adjust the 1.8V voltage of VDD1 executing command "bandgap XX"(XX is the value). 1. Confirm that the voltage between test point VDD3 and GND is 3.3 V 0.3 V (Backlight is ON). 1. Confirm that the voltage between test point VDD2 and GND is 2.5 V 0.1 V. 1. BBIC Confirmation (Execute the command "getchk"). 2. Confirm the returned checksum value. Connection of checksum value and program number is shown below. Check or Replace Parts IC1, Q2, C10

(B)

DC/DC Supply Confirmation

VDD3

(C) 2.5 V Supply Confirmation (D)* BBIC Confirmation

VDD2 -

IC1, F1, C1, C2, C3, R1, Q1, D1, L1 IC1, Q3, C5 IC1, X1, C6, C7, R19

(E)* EEP-ROM Confirmation

-

1. EEP-ROM Confirmation (Execute the command "ChkTGA711XXrevYY"). XX: country code YY: revision number 2. Confirm the returned checksum value.

Note:
(F) Charge Control Check & Charge Current Monitor Check -

IC1, IC3, R40, R41, R42, Q10, Q11, R43, R44, C37

"XX", "YY", and "checksum" vary depending on the country version. You can find them in the batch file, PQZZ- mentioned in JIG and PC (P.51). 1. Apply 3.5 V between J3(+) and J4(-) with DC power supply and set current limit IC1, Q4, Q5, to 250 mA. Q9, D6, D7, 2. Confirm that the current limit LED of DC power supply is ON/OFF. D8, L4, 3. Decrease current limit of DC power supply to 100mA. L5, R5, R6, 4. Confirm that the current limit LED of DC power supply is stable. (Current limiter R7, R8, F1 is ON.) (If charge control cannot be confirmed by this procedure, please use battery to handset power supply and try again.)

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

Items (G)* Charge Detection (OFF) Check

Check Point -

Procedure 1. Stop supplying 3.5 V to J3 CHARGE(+) and J4 CHARGE(-). 2. Execute the command "Backloff" then "charge". 3. Confirm that the returned value is 00 (hex).

(H)*

Battery Monitor Check

-

1. Apply 2.25 V between BATT and GND. 2. Execute the command "readbatt". It assumes that the return value is XX. a) 1E XX 2C: No need to adjust b) XX: 18 ~ 1D: Need to adjust XX: 2D ~ 32: Need to adjust Write AD value of 2.25V to EEPROM. ex) read data: XX = 1D, write data: YY = 1D read data: XX = 2D, write data: YY = 2D EEPROM = 0004(Low Voltage) write "YY" Execute the command "wreeprom 00 04 01 YY". EEPROM = 0005(No Voltage) write "YY - 1D" Execute the command "wreeprom 00 05 01 ZZ". EEPROM = 000A(Low Voltage BL) write "YY - 16" Execute the command "wreeprom 00 0A 01 WW".

Check or Replace Parts IC1, Q4, Q5, Q9, D6, D7, D8, L4, L5, R5, R6, R7, R8, F1 IC1, F1, C1 C3, R12

Note:
ZZ = YY - 1D, WW = YY - 16 No Voltage writing data limit is `00'. c) XX: 00 ~ 17: Reject XX: 33 ~ FF: Reject Apply 2.40 V between BATTERY(+) and BATTERY(-). IC1, F1, C1 Confirm that there is no flashing of Battery Icon. C3, R12 Apply 2.25 V 0.08 V between BATTERY(+) and BATTERY(-). Confirm that there is flashing of Battery Icon. Apply 2.6 V between BATTERY(+) and BATTERY(-) with DC power. IC1, X1, C6, Execute the command "conttx". C7, R19, Input Command "rdeeprom 00 01 01", then you can confirm the current value. IC4, C57 Adjust the frequency of CLK executing the command "setfreq xx (where xx is the value)" so that the reading of the frequency counter is 10.368000 MHz 10 Hz.

(I)

Battery Low Confirmation

-

(J)* BBIC Clock Adjustment

CLK

1. 2. 3. 4. 1. 2. 3. 4.

(K)* Transmitted Power Confirmation

-

(L)*

Modulation Check and Adjustment

-

(M) Frequency Offset Confirmation

-

(N)

Frequency Drift Confirmation

-

Note: CLK is displayed only for a few seconds when executing the command "conttx" after battery is inserted. Remove the Antenna before starting step from 1 to 4. IC1, IC4, C66, 1. Configure the DECT tester (CMD60) as follows; C58, C57, C50, C52, Test mode: PP C53, RFPI: 0102030405 R52, C60, Traffic Carrier: 5 C61 Traffic Slot: 4 Mode: Loopback RF LEVEL = -70 dBm 2. Execute the command "regcmd60 01 02 03 04 05". 3. Initiate connection from DECT tester. 4. Confirm that the NTP value at A201 is 19 dBm ~ 25 dBm. IC1, IC4, C66, Follow steps 1 to 3 of (K) above. 4.Confirm that the B-Field Modulation is -350 ~ -400/+320 ~ +370 kHz/div using C58, C57, data type Fig 31. C50, C52, 5.Adjust the B-Field Modulation if required. (Execute the command "Readmod" C53, and "wrtmod xx", where xx is the value.) R52, C60, C61 Follow steps 1 to 3 of (K) above. IC1, IC4, C66, 4.Confirm that the frequency Offset is < 45 kHz. C58, C57, C50, C52, C53, R52, C60, C61 Follow steps 1 to 3 of (K). IC1, IC4, C66, 4.Confirm that the frequency Drift is < 30 kHz/ms. C58, C57, C50, C52, C53, R52, C60, C61

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

Items (O) Sensitivity Receiver Confirmation

Check Point -

Procedure Follow steps 1 to 3 of (K). 4.Set DECT tester power to -88 dBm. 5.Confirm that the BER is < 1000 ppm.

(P)

Timing Confirmation

-

Follow steps 1 to 3 of (K). 4.Confirm that the Timing accuracy is < 2.0 ppm.

(Q)* RSSI Level Confirmation

-

(R) Power RAMP Confirmation

-

Follow steps 1 to 3 of (K). 4.Set DECT tester power to -81 dBm. 5.Execute the command "readrssi". 6.Confirm that the returned value is 1C 8 (hex). 7.Set DECT tester power to -63 dBm. 8.Execute the command "readrssi". 9.Confirm that the returned value is 25 8 (hex). Follow steps 1 to 3 of (K). 4.Confirm that Power RAMP is matching.

Check or Replace Parts IC1, IC4, C66, C58, C57, C50, C52, C53, R52, C60, C61 IC1, IC4, C66, C58, C57, C50, C52, C53, R52, C60, C61 IC1, IC4, C66, C58, C57, C50, C52, C53, R52, C60, C61

(S) Audio Check and Confirmation

-

1. 2. 3. 4. 5. 6.

(T)

SP phone Audio Check and Confirmation

-

1. 2. 3. 4. 5.

IC1, IC4, C66, C58, C57, C50, C52, C53, R52, C60, C61 Link to BASE which is connected to Line Simulator. IC1, R21, R22, Set line voltage to 48 V and line current to 40 mA. R23, R24, Input -45 dBm/1 KHz to MIC and measure Line output level. R25, C11, Confirm that the level is -8.5 dBm 2 dBm and that the distortion level is < 5 % D4, D5, C12, at TEL Line (600 Load). C73, C74, Input -20dBm/1KHz to Line I/F and measure Receiving level at REV1 and C75, C95, C96 REV2. Confirm that the level is -21 dBm 2 dBm and that the distortion level is < 5 % at Receiver. (vol = 2) IC1, R21, R22, Link to Base which is connected to Line Simulator. R23, R24, Set line voltage to 48 V and line current to 40 mA. R25, C11, Set the handset off-hook using SP-Phone key. Input -25 dBm/1KHz to Line I/F and measure Receiving level at SP_TEST1 C39, C12, C73, C74, and SP_TEST2. Confirm that the level is -14 dBm 2 dBm and that the distortion level is < 5 %. C75, C95, C96 (vol = 3)

9.3.2.

Troubleshooting for Speakerphone

When the customer's telephone line corresponds to the following conditions, and the transmission signal of SP-Phone is interrupted, performing the next set up to a cordless handset will improve it to some extent. Conditions 1. When customer's line has less line loss. ex.) The customer is using optical fiber, ISDN terminal adaptor, or PBX. In this case, receiving signal is strong and it may affect transmission signal. 2. When the other party is talking from noisy place. ex.) The other party is using cellular phone. The background noise is very loud. In this case, the noise from the other party (i.e. surrounding noise) may affect transmission signal. Setting Method Change the address of EEPROM (0144) from 00 to 01.

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

9.4.
9.4.1.

How to Replace the Flat Package IC
Preparation

Even if you do not have the special tools (for example, a spot heater) to remove the Flat IC, with some solder (large amount), a soldering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.

PbF (: Pb free) Solder Soldering Iron Tip Temperature of 700 F 20 F (370 C 10 C) Note: We recommend a 30 to 40 Watt soldering iron. An expert may be able to use a 60 to 80 Watt iron where someone with less experience could overheat and damage the PCB foil. Flux Recommended Flux: Specific Gravity 0.82. Type RMA (lower residue, non-cleaning type) Note: See About Lead Free Solder (Pbf: Pb free) (P.4)

9.4.2.

How to Remove the IC

1. Put plenty of solder on the IC pins so that the pins can be completely covered. Note: If the IC pins are not soldered enough, you may give pressure to the P.C. board when cutting the pins with a cutter.

2. Make a few cuts into the joint (between the IC and its pins) first and then cut off the pins thoroughly.

3. While the solder melts, remove it together with the IC pins.

When you attach a new IC to the board, remove all solder left on the board with some tools like a soldering wire. If some solder is left at the joint on the board, the new IC will not be attached properly.

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

9.4.3.

How to Install the IC

1. Temporarily fix the FLAT PACKAGE IC, soldering the two marked pins.

*Check the accuracy of the IC setting with the corresponding soldering foil. 2. Apply flux to all pins of the FLAT PACKAGE IC.

3. Solder the pins, sliding the soldering iron in the direction of the arrow.

9.4.4.

How to Remove a Solder Bridge

1. Lightly resolder the bridged portion. 2. Remove the remaining solder along the pins using a soldering iron as shown in the figure below.

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

9.5.
9.5.1.

How to Replace the LLP (Leadless Leadframe Package) IC
Preparation

PbF (: Pb free) Solder Soldering Iron Tip Temperature of 700F 20F (370C 10C) Note: We recommend a 30 to 40 Watt soldering iron. An expert may be able to use a 60 to 80 Watt iron where someone with less experience could overheat and damage the PCB foil. Hot Air Desoldering Tool Temperature: 608F 68F (320C 20C)

9.5.2.

Caution

To replace the IC efficiently, choose the right sized nozzle of the hot air desoldering tool that matches the IC package. Be careful about the temperature of the hot air desoldering tool not to damage the PCB and/or IC.

9.5.3.

How to Remove the IC

1. Heat the IC with a hot air desoldering tool through the P.C.Board.

2. Pick up the IC with tweezers, etc. when the solder is melted completely. Note: Be careful not to touch the peripheral parts with tweezers, etc. They are unstable.

When it is hard to melt the solder completely, heat it with a hot air desoldering tool through the IC besides through the P.C.Board.

3. After removing the IC, clean the P.C.Board of residual solder.

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

9.5.4.

How to Install the IC

1. Place the solder a little on the land where the radiation GND pad on IC bottom is to be attached.

2. Place the solder a little on the land where IC pins are to be attached, then place the IC. Note: When placing the IC, the positioning should be done very carefully.

3. Heat the IC with a hot air desoldering tool through the P.C.Board until the solder on IC bottom is melted. Note: Be sure to place it precisely, controlling the air volume of the hot air desoldering tool.

4. After soldering, confirm there are no short and open circuits with visual inspection.

9.5.5.

How to Remove a Solder Bridge

When a Solder Bridge is found after soldering the bottom of the IC, remove it with a soldering iron.

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

10 Disassembly and Assembly Instructions
10.1. Disassembly Instructions
10.1.1. Base Unit

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

10.1.2. Handset

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

10.1.3. Charger Unit

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

10.2. How to Replace the Handset LCD

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

11 Measurements and Adjustments
11.1. The Setting Method of JIG (Base Unit)
11.1.1. Preparation 11.1.1.1. Equipment Required
DECT tester: Rohde & Schwarz, CMD 60 is recommended. Frequency counter: It must be precise enough to measure intervals of 1 Hz (precision; 4 ppm). Hewlett Packard, 53131A is recommended. Digital multi-meter (DMM): it must be able to measure voltage and current. Oscilloscope

11.1.1.2. JIG and PC
Serial JIG JIG Cable: PQZZ1CD300E* PC which runs in DOS mode Batch file CD-ROM for setting: PQZZTG7120FX Note: *: If you have the JIG Cable for TCD500 series (PQZZ1CD505E), change the following values of resistance. Then you can use it as a JIG Cable for both TCD300 and TCD500 series. (It is an upper compatible JIG Cable.)
Resistor R2 R3 R4 R7 Old value (k) 22 22 22 4.7 New value (k) 3.3 3.3 4.7 10

11.1.2.

PC Setting

11.1.2.1. Connections
Connect the AC adaptor to CN2 (base unit). Connect the JIG Cable GND (black). Connect the JIG Cable RX (red) and TX (yellow).

Note: *: COM port names may vary depending on what your PC calls it.

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

11.1.2.2. Batch file Settings

Note: "****" varies depending on the country.

11.1.2.3. Commands
See the table below for frequently used commands.
Command name rdeeprom readid writeid setfreq hookoff hookon getchk wreeprom Function Read the data of EEPROM Read ID (RFPI) Write ID (RFPI) Adjust Frequency of RFIC Off-hook mode on Base On-hook mode on Base Read checksum Write the data of EEPROM Example Type "rdeeprom 00 00 FF", and the data from address "00 00" to "FF" is read out. Type "readid", and the registered ID is read out. Type "writeid 00 18 E0 0E 98", and the ID "0018 E0 0E 98" is written. Type "setfreq nn". Type "hookoff". Type "hookon". Type "getchk". Type "wreeprom 01 23 45". "01 23" is address and "45" is data to be written.

52

11.2.1.

(Q) AF OSC (R) DC POWER 6.5 V 600 GND L1R 12 2w L1T DC_IN CHARGE+ CHARGEDigital Volt Meter

OSC

AF VOLT (Q) METER

LOOP Simulator

(S) (Q)

BELL Simulator

Flow Solder Side View

Call - ID Simulator

DTMF Tester
CHARGE
L2T

(H)
BLACK RED
L2R L1T L1R

3 4 2 1 DC_IN

Note: (A) - (S) is referred to Check Point (Base Unit) (P.36)
2 DCM

GND GND
LINE_DC VDD3 ANT A_2

11.2. Adjustment Standard (Base Unit)

(I) (J) (K) (L) (M) (N) (O) (P) DECT Tester CMD60 ANT GND
VDD4 SP+ A_1

When connecting the simulator equipment for checking, please refer to below.

150

6.3 V 47 uF

53
VDD2

Digital Volt Meter

LINE_DC

PbF
SP SP-

GND

VDD1

AF Volt Meter
PQUP11410Z
KX-TG7100 7120 8100 8120

(I)
GND TX RX

CLK

Frequency Counter
Short A_1 and GND.
A

(F) CLK

BUZ

BUZ

VDD3

VDD4

OSC

RX TX GND

U-ART

PC (D) (E) (F) (G) (H) (I) (J) (O) (S) VDD1 VDD2

AF VOLT METER AF OSC

SP

MIC

KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

Dummy Handset

(A) (B) (C)

Digital Volt Meter

KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

11.3. Adjustment Standard (Charger Unit)
When connecting the simulator equipment for checking, please refer to below.

11.3.1.

Flow Solder Side View
(A)

DC POWER 6.5 V TP3 GND (TP4) GND (TP2)

Digital Volt Meter 12 /2 W TP1 RED TP2 TP1

2

1

Note: (A) is referred to Check Point (Charger Unit) (P.39)

PbF

TP4 BLACK
for_ PQLV30045ZA

PQUP11413Z
TP3
A

54

KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

11.4. The Setting Method of JIG (Handset)
11.4.1. Preparation 11.4.1.1. Equipment Required
DECT tester: Rohde & Schwarz, CMD 60 is recommended. Frequency counter: It must be precise enough to measure intervals of 1 Hz (precision; 4 ppm). Hewlett Packard, 53131A is recommended. DC power: it must be able to output at least 1 A current under 2.4 V for Handset. Digital multi-meter (DMM): it must be able to measure voltage and current. Oscilloscope

11.4.1.2. JIG and PC
Serial JIG JIG Cable: PQZZ1CD300E* PC which runs in DOS mode. Batch file CD-ROM for setting: PQZZTG7120FX Note: *: If you have the JIG Cable for TCD500 series (PQZZ1CD505E), change the following values of resistance. Then you can use it as a JIG Cable for both TCD300 and TCD500 series. (It is an upper compatible JIG Cable.)
Resistor R2 R3 R4 R7 Old value (k) 22 22 22 4.7 New value (k) 3.3 3.3 4.7 10

11.4.2.

PC Setting

11.4.2.1. Connections
Connect the DC Power or Battery to J1 and J2 (Handset). Connect the JIG cable GND (black). Connect the JIG cable UTX (yellow) and URX (red).

Note: *: Com port names may vary depending on what your PC calls it.

55

KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

11.4.2.2. Batch file Settings

Note: "*****" varies depending on the country.

11.4.2.3. Commands
See the table below for frequently used commands.
Command name rdeeprom readid writeid setfreq getchk wreeprom Function Read the data of EEPROM Read ID (RFPI) Write ID (RFPI) Adjust Frequency of RFIC Read checksum Write the data of EEPROM Example Type "rdeeprom 00 00 FF", and the data from address "00 00" to "FF" is read out. Type "readid", and the registered ID is read out. Type "writeid 00 18 E0 0E 98", and the ID "0018 E0 0E 98" is written. Type "setfreq nn". Type "getchk". Type "wreeprom 01 23 45". "01 23" is address and "45" is data to be written.

56

11.5.1.

Oscilloscope A (When at BATT LOW) DC POWER 2.00-2.25 V DECT Tester CMD60 1 ANT POWER KEY 56 150 REV+ REVSP+ SP56 8 1 uF GND B AF VOLT METER (S) (T) (K) (L) (M) (N) (O) (P) (Q) (R)

Oscilloscope

Component View

Current Probe

DC 6.5 V

TP20

Note: (A) - (T) is referred to Check Point (Handset) (P.40)
POWER F1 C10 C4 C9 VDD3 C8 C18 C38 ANT1 C66

TP21
KX-TG7120/TGA711
J1
C21 D7 C5 GND BAT R12 Q3 Q2 C3 VDD1 C1 VDD2

32

27

L4 R11 C15 R7 R66 R63 R8 Q4 Q5

ANT

1 26

TP20
R5 R6 Q9

60 61 41 40 1 8
C26 C22

PQUP11409Z PbF
C60 C59 D5

11.5. Adjustment Standard (Handset)

CHARGE+
D6

J3

L1
C101 C98 D4 C99

C23 R16

C33 C32 C31 C30

6.3 V 47 uF TP22 MIC+
C12 C73

IC3
4 5

C39

TP22

When connecting the simulator equipment for checking, please refer to below.

57
IC1 SP
JTAG C37 C94 Q11 Q10 Q1 R1 R2 C2 D1
SP_T E SP_T ST1 EST 2

R42 R41 R40

C71

C61

C62

D8 R22 R44 R43 R25 C97

AF GENERATOR
C74 C75

C11 R15 R24 C14 R23 R21 C95 C70 C36 C96 R13 R47 L6 C7 C20 C25 R19 C6 R92 Q7 C100 Q8 R91 C24 C19 R14 C93 R64

IC4
C72

MIC
TP23

C52 C53

TP23
80 1 21 20
R65

MICTP21
C35 C91 R45 UTX

R52

C58 C57

(S)
C34 C92 URX R46 J2 L5

REV
CLK

R51

CHARGER62 R61

J4

R EV _T ES T1

R EV _T ES T2

C51 R53

10 11 16

17

CLK_G

C56

C54

C55

C50

A

X1

VDD3 VDD2 VDD1 GND URX PC (A) (D) (E) (H) (I) (J) (K) (Q) UTX GND GND Digital Volt Meter (A) (B) (C) CLK Frequency Counter (J) OSC (S) (T) AF VOLT METER AF OSC

2.7 V Zener

DC POWER 2.30-2.60 V

LOOP Simulator

600

KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

(F) (G) (H) (I)

Dummy Base Unit

KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

11.6. Things to Do after Replacing IC
Cautions: Some of the content on this page may not apply to models from some countries. The contents below are the minimum adjustments required for operation.

11.6.1.

Base Unit

Before making the following adjustment, ensure you have carried out PC Setting (P.51) in The Setting Method of JIG (Base Unit).
IC Programs for Voice processing, interface for RF and EEPROM Necessary Adjustment 1. Default batch file: Execute the command "default.bat". 2. Country version batch file: Execute the command "TG7120XXrevYY.bat". (*1) 3. Clock adjustment: Refer to Check Point (F). (*2) 1. Change the address "0000" of EEPROM to "AA". 2. Default batch file: Execute the command "default.bat". 3. Country version batch file: Execute the command "TG7120XXrevYY.bat". (*1) 4. Clock adjustment: Refer to Check Point (F). (*2) 1. Wait more than 15 seconds after connecting the JIG Cables. 2. Execute the command "VPDL06 -8M ZZ.bin" (*1) (writing time: aprox. 1.5 min.)

BBIC (IC7)

EEPROM Adjustment parameter data (IC5) (country version batch file, default batch file, etc.)

FLASH (IC9)

Voice prompt data (vary depending on country version)

Note: (*1) XX: country code, YY: revision number, ZZ: Voice Prompt "XX", "YY" and "ZZ" vary depending on the country version. You can find them in the batch file, PQZZ- mentioned in JIG and PC (P.51). (*2) Refer to Check Point (Base Unit) (P.36)

11.6.2.

Handset

Before making the following adjustment, ensure you have carried out Batch file Settings (P.52) in The Setting Method of JIG (Handset).
IC Programs for Voice processing, interface for RF and EEPROM Necessary Adjustment 1. Default batch file: Execute the command "default.bat". 2. Default batch file (remaining): Execute the Command "TGA711DEFrevYY.bat". (*3) 3. Country version batch file: Execute the command "TGA711XXrevYY". (*3) 4. Clock adjustment: Refer to Check Point (J). (*4) 5. 1.8 V setting and battery low detection: Refer to Check Point (A), (H) and (I). (*4) 1. Change the address "0015" of EEPROM to "00". 2. Default batch file: Execute the command "default.bat". 3. Default batch file (remaining): Execute the Command "TGA711DEFrevYY.bat". (*3) 4. Country version batch file: Execute the command "TGA711XXrevYY". (*3) 5. Clock adjustment: Refer to Check Point (J). (*4) 6. 1.8 V setting and battery low detection: Refer to Check Point (A), (H) and (I). (*4)

BBIC (IC1)

EEPROM Adjustment parameter data (IC3) (country version batch file, default batch file, etc.)

Note: (*3) XX: country code, YY: revision number "XX" and "YY" vary depending on the country version. You can find them in the batch file, PQZZ- mentioned in JIG and PC (P.51). (*4) Refer to Check Point (Handset) (P.40)

58

KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

11.7. RF Specification
11.7.1. Base Unit
Value 20 dBm ~ 25 dBm -350 ~ -400/+320 ~ +370 kHz/div -45 kHz ~ +45 kHz < 30 kHz / ms < 1000 ppm < 2.0 ppm 22 hex A hex Power RAMP is matching Refer to -. * Check Point (Base Unit) (I) Check Point (Base Unit) (J) Check Point (Base Unit) (K) Check Point (Base Unit) (L) Check Point (Base Unit) (M) Check Point (Base Unit) (N) Check Point (Base Unit) (O) Check Point (Base Unit) (P)

Item TX Power Modulation Frequency Offset Frequency Drift RX Sensitivity Timing Accuracy RSSI Level Power RAMP

*: Refer to Check Point (Base Unit) (P.36)

11.7.2.

Handset
Value 19 dBm ~ 25 dBm -350 ~ -400/+320 ~ +370 kHz/div -45 kHz ~ +45 kHz < 30 kHz / ms < 1000 ppm < 2.0 ppm 1C hex 8 hex (at -81dBm) 25 hex 8 hex (at -63dBm) Power RAMP is matching Refer to -. ** Check Point (Handset) (K) Check Point (Handset) (L) Check Point (Handset) (M) Check Point (Handset) (N) Check Point (Handset) (O) Check Point (Handset) (P) Check Point (Handset) (Q) Check Point (Handset) (R)

Item TX Power Modulation Frequency Offset Frequency Drift RX Sensitivity Timing Accuracy RSSI Level Power RAMP

**: Refer to Check Point (Handset) (P.40)

59

KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

11.8. How to Check the Handset Speaker or Receiver
1. Prepare the digital voltmeter, and set the selector knob to ohm meter. 2. Put the probes at the speaker terminals as shown below.

11.9. Frequency Table (MHz)
Channel No 1 2 3 4 5 6 7 8 9 10 Transmit Frequency 1897.344 1895.616 1893.888 1892.160 1890.432 1888.704 1886.976 1885.248 1883.520 1881.792 BASE UNIT Receive Frequency 1897.344 1895.616 1893.888 1892.160 1890.432 1888.704 1886.976 1885.248 1883.520 1881.792 Transmit Frequency 1897.344 1895.616 1893.888 1892.160 1890.432 1888.704 1886.976 1885.248 1883.520 1881.792 HANDSET Receive Frequency 1897.344 1895.616 1893.888 1892.160 1890.432 1888.704 1886.976 1885.248 1883.520 1881.792

Note: Channel No. 10: In the Test Mode on Base Unit and Handset.

60

KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

12 Schematic Diagram
12.1. For Schematic Diagram
12.1.1. Base Unit (Schematic Diagram (Base Unit_Main))
Notes: 1. DC voltage measurements are taken with voltmeter from the negative voltage line.

2. The schematic diagrams may be modified at any time with the development of new technology.

12.1.2. Handset (Schematic Diagram (Handset))
Notes: 1. DC voltage measurements are taken with an oscilloscope or a tester with a ground. 2. The schematic diagram may be modified at any time with the development of new technology.

12.1.3. Charger Unit (Schematic Diagram (Charger Unit))
Notes: 1. DC voltage measurements are taken with voltmeter from the negative voltage line.

2. The schematic diagram may be modified at any time with the development of new technology.

61

KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

12.2. Schematic Diagram (Base Unit_Main)

L2T L1T L1R L2R J1 6 1 2 3 4 5 CN1 J2 SA2
(2125) (2125)

L1 C2 33u K680p NC LINE_DC 1 D3 NC J4 J3 0 K680p
2 3 1 4

NC

D16 D15

NC

SA1

2

Q3

Loop Current
R25 NC NC D7 2 NC R24 C13 NC D4
2

C9

R30 82

1 1

(1)

2

NC

39k

C10

R18

27k

C20

R14 100k

3

2

R26

2.7k C11

R11

NC

(3216)

(3216)

R2

NC

10

R15

C R17 K2.2u R16 3.9k

C

2 1

NC NC

33u
2

1

R12

10k

C R3 C5 K1000p C 180k C3 1500p C4 1500p R5 R4 1M C6

680

3 2

Q4

1

TP9

C18 5.6k R20 K4700p R19 C14 8.2k

C19 10p C R23 C22

C21

NC

3

R13

(2125)

1

L2

Q2

3

C R29

C K0.056u C24 C23 NC C 56

(4532)

12

C 10p (1005) 10p (1005) C136

R21

C TP_RLY1 L1T/TP_RLY2 L2T/TP_RLY3 for JT L1R/TP_RLY4 TP_RLY5
2

C

C12

10k

4.7k

100k R27

1u
(2125)

C

C

C C15

C K2.2u R22
(2125)

C K0.01u R28 470k C25 100k

NC (2125) C16

NC (2125) C17

180k R6 K1000p 1M R7 10p R8 NC1 NC 100k C7 D5

C

C137

D2 1 NC
3 1

(4532)

27

Q1
2
(1005)

C

C

C
+2.5V

C

C

C

C

C

C

D62

R9
1 2

10p

C8

NC DCM
1

100k

R10

1

NC

D92 1

NC C

for NL

2

C

C

+2.5V

Caller ID, Bell Signal

10k

(1005)

R1

C1

NC

J101 DC_IN

C

C C52 J220p R32 100k C53 R35 1k

TX_AF
R116 C141 56n
(1005) (1005)

NC

D8

2

Q5

NC

1

1

TP10

CN2 C

2

NC

D1

18

C

RX_AF
(1005)

K0.022u R36 C55 100k K0.1u

1k(1005)

R33

100k R37 C57

C

NC

NC

K0.1u

C56

J220p R34

C54 Bell signal

for TG7120/8120

C R68

R69 0

NSA/CLIP

+8.0V

IC1
3 NC 5 C 6 NC 7
Cont Cn GND Sub NC Vin Vout

3.3V VDD3
+3.3V

except TG7120/8120

NC

R70 0

TAMIC_CSn

R38

NC C31

K2.2u

100u

C30

120

C32

(2125)

(1005)

C36

4

10p (1608)

R72

(1005)

C34 4 NC 3 2 NC C35 C
+4.0V

Output Input Fin ADJ/GND

2 330u C37 R64 NC
1 2 3
SP+ (1005) +2.5V

D12 R67 C58
(1005)

200

NC

R117 (1005)

C147

R39

(1005)

10p

C

VDD4

C69 NC

(1005)

O/I VSS 4 CONT

for TG7100

C68

(1005)

K1u

R66 NC
64 63 62 61

Q8

C

(1005)

I/O 5 VDD

C

3.3k R71(1005) C66 NC 3.3k (1005) (1005) C67K0.1u

18

C

15

C

C

C

1

C

C

2

1

VDD1

+1.8V

1.8V

C33

R43

NC

1

C C145 10p
(1005)

+2.5V

C70K1u

60

59

58

57

R65

56

55

54

53

52

51

50

49

R46

1 10p (1005) R40 NC (1005) D10 C135
2

C38 NC C39 NC C40 C41

C144 NC

C150 10p

(2125)

C43

(1005)

NC

+VIN -VIN

V+ VOUT1

R4710p

1

3 4

6 5

C NC
(1005)

10p (1005)

C

C146 (1005)

2

VOUT2 GND

C138

(1005)

CD +VREF

8 7

R44
(1005)

SP+ SP+

0.1u
except TG7100

C59 K0.1u
(1005)

ADC0 ADC2 P13/*INT3 P14/*INT4 CIDINp MICp AGND VREFm *MIC/CIDOUT RINGING LSRp/REF *LSR/REF *CIDIN AVD2 AVS2 LDO1_Sense

NC

(1005)

IC3

NC

0

C

C

NC SP-

1 2 3

C

C

C C

R42 NC NC C42 R41 NC NC

R45 NC C(1005)

SP(1005)

C

C60 K0.1u (1005)

4 5 6 7 8 9

NC
for TG7120/8120

SPC61 K0.1u(1005) R73

C

10 11 12 13 14 15 16

RFCLKd TDO RDI SK PD1/SIO LE P31/PD1 P32/PD2 P33/PD3 P34/PD4 TDOD/P35/PD5 P36/PD6 VSS2 VDDIO2 VDD2 PCM_FSC/*INT0/P10

NC (3216) C46

+2.5V

R48

NC R51

NC

C134 (1005) R52
(1005)

C62

1

3.3M(1005) 3 C64 10u

NC

CN4 1 C44
(1005)

C

D11

NC

NC

2

2 NC

R49 NC R50

NC C151 10p C (1005)

C143
(1005)

2

(1005)

1

(1005)

17

18

19

20

21

22 23

24

25

26

27

28

29

30

31

1 3

3

Q6
1

NC
(1005)

Q7
2

I/O 5 VDD O/I VSS 4 CONT

C63 D6p C
RSSI

C45

NC

R54 NC
(1005)

C47 C149 10p NC

2

R53

R77 10k

C
for TG7100/8100

NC

NC C

1

NC

3

RFCLK L9 TDO 0 RDI SK SIO LE RESET

C74(1005) K0.1u C75 (1005) K0.1u

2

32

IC4NC NC
(1005)

C C

C65 K1u

J27p (1005) X1

*INT1/P11 VDDIO1 VDD1 VSS1 SDA1/P25 SCL1/P24 *INT5/VDDE/P15 *INT2/P12 AVD AVS CAP Xtal1 VSSRF RFCLKp RSSI/RFCLKm VDDRF

IC7
BBIC

LDO2_CTRL LDO1_CTRL VBAT1 *RST P17/CHARGE/INT7 P23/ADC1 VDD3 VSS3 P07/SPIDI/PCM_DIN P06/SPIDO/PCM_DOUT P05/SPICLK/PCM_CLK P04/SCL2 P03/SDA2 P02/JTIO P01/URX P00/UTX

48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33

C72 K220n C73 K0.1u

R81 3.3k (1005) SPIDI SPIDO SPICLK TAM_RSTn TAM_CSn

C139

NC

(1005)

C

1

C

10u

C

C

C140

C

C71

IC2

IC6

2.5V
3 2

C

Q9

VDD2

(1005) R76 1k

RFCLK

RDY

K0.1u

ROW0

R55 22
(6332)

R62

R63

C51

2.2k

(1005)

2.2k

C77

R56 22 C48 10p
(6332)

TP15 Charge-

1 2 3

A1 A2 VSS

WP 7 SCL
6

R74

C

1

A0

VCC 8

C

0.7V 0V

TX DATA
(1005)

RX DATA

2

TP23 100

NC (1005) D17

(1005)

(1005)

NC

TP16 Charge+

EEPROM

JTAG

R75

(1005)

Charge Current

+2.5V

10k

R78

C C148 10p

(1005)

C

ROW0 ROW1 ROW2 KEY0 KEY1

(2) (3)
R79 1k
(1005)

25mV p-p

J103

RX

C NC (1005) C79
(1005)

R80 NC
(1005)

J102

TX

C49

10p

4

SDA 5

1

2

C78

NC

1k

C

C

C

C

+3.3V

+2.5V

C R57 3.9k
(1005)

C76

C

R59 2

1 Q14 3

for TG7100/8100

2.2k R58 6.8k
(1005)

R61 (1005) C50
(1005) (1005)

R60

C

C

22k

1k

C

NC: No Components

K0.01u

62

NC

IC5

SW1 NC

C

C C

J104

GND

KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT

R31

820

(1)
C26 NC
(1005)

ANT_2 L10 C117 NC C29 NC 3p
(2125)

ANT_1 L11 C124 0.5p C R108
(1005)

C27

10u C28

6.8n

L3

1p

C

C

C R107 NC C118 D10p

L4 6.8n 10p (1005) DA1

C121

3

C119

NC

L5 NC

C
2 1

NC D10p C125 C R109 180 A_1

C R106 ANT 270

C12