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PAMS Technical Documentation NSE­3 Series Transceivers

Disassembly & Troubleshooting Instructions

Original, 11/97

NSE­3 Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

CONTENTS Page No

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Phone is totally dead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flash programming doesn't work . . . . . . . . . . . . . . . . . . . . . . . Flash Programming (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flash Programming failure (2) . . . . . . . . . . . . . . . . . . . . . . . Flash Programming failure (3) . . . . . . . . . . . . . . . . . . . . . . . Flash Programming failure (4) . . . . . . . . . . . . . . . . . . . . . . . Power doesn't stay on, or phone is jammed . . . . . . . . . . . . . . Display Information: Contact Service . . . . . . . . . . . . . . . . . . . . The phone doesn't register to the network or phone doesn't make a call Phone register failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SIM card is out of order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SIM Card failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Audio failure (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Audio failure (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Charger failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiver Fault (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiver Fault (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiver Fault (3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiver Fault (4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiver Fault (5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiver Fault (6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiver Fault (7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transmitter Fault (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transmitter Fault (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transmitter Fault (3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 5 6 6 8 9 10 11 12 13 13 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

Page 2

Original, 11/97

PAMS Technical Documentation

NSE­3 Disassembly & Troubleshooting Instructions

Remove battery

Remove dust cap

Carefully remove A­cover Note snap fixings !

Remove back cover screws (4 pcs)

Turn around. Remove UI module screws (2 pcs)

Original, 11/97

Page 3

NSE­3 Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

Remove UI­module and frame

Remove engine module screw (1 pcs)

Remove engine module

Pull out antenna Remove RTC­battery

Remove microphone

Page 4

Original, 11/97

PAMS Technical Documentation

NSE­3 Disassembly & Troubleshooting Instructions

Trouble Shooting
The following hints should facility finding the cause of the problem when the circuitry seems to be faulty. This trouble shooting instruction is divided following section. 1. Phone is totally dead 2. Flash programming doesn`t work 3. Power doesn`t stay on or the phone is jammed 4. Display information: Contact Service 5. Phone doesn`t register to the network or phone doesn`t make a call. 6. Plug in SIM card is out of order ( insert SIM card or card rejected). 7. Audio fault. 8. Charging fault The first thing to do is carry out a through visual check of the module. Ensure in particular that: a) there are not any mechanical damages b) soldered joints are OK

Original, 11/97

Page 5

NSE­3 Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

Phone is totally dead
This means that phone doesn't take current at all when the power switch is pressed or when the watchdog disable pin (X001 pin 11) is grounded. Used battery voltage must be higher than 3.0 V. Otherwise the hardware of CCONT (N100) prevents totally to switch power on.

Phone is totally dead
YES

J232 VBAT is 3.6 V
YES

NO

Failure in VBAT line Check X101, X102, L103

Voltage at pin 29 of CCONT (N100) is 3.6 V
YES

NO

Faulty circuit N100

N100 pin 55 (VBB) 2.8 V N100 pin 25 (VXO) 2.8 V when PWR switch is pressed or watchdog disable pin is grounded
YES

NO

CCONT (N100) pin 29 0V when PWR switch is pressed or watchdog disable pin is (X001) grounded
YES

NO

Check R118, X300 Check UI module Check watchdog disable line to X001

See section: Power Doesn't Stay On

Faulty circuit N100

Flash programming doesn't work
The flash programming can be done via panel connector X001 or via system connector X100. In production, the first programming is done via panel connector X001. After this, the panel connector is cut away, thus other flash programmings must be done via system connector X100. The main differences between these are: a) FLASH programming voltage is produced different way. b) Signal routings are different. The fault finding diagrams for flash programming via panel connector are shown in figures 32 and 33. The fault finding diagrams for flash programming via system connoctor are shown in figures 34 and 35. In flash programming error cases the flash prommer can give some information about a fault.

Page 6

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PAMS Technical Documentation

NSE­3 Disassembly & Troubleshooting Instructions

The fault information messages could be: ­ MCU doesn't boot ­ Serial clock line failure ­ Serial data line failure ­ External RAM fault ­ Algorithm file or alias ID don't find ­ MCU flash Vpp error In cases that the flash programming doesn't succeed there is a possibility to check short circuits between the memories and the MCU (MAD2). This test is useful to do, when the fault information is: MCU doesn't boot, Serial clock line failure or Serial data line failure. The test procedure is following: 1. Connect the short circuit wire between the test points J229 and J230. 2. Switch power on 3. If the voltage level in testpoint J225 is 2.8 V ("1"), the interface is OK. If there is a short circuit, the voltage level in testpoint J225 stays low and 32kHz square wave signal can be seen in the lines which are already tested. One must be noticed that this test can be found only short circuits, not open pins. Also upper data lines (15:8) of flash circuit D210 are not included to this test.

CCONT pin 54 ( PURX )

MAD pin 38

( MCUAD0)

selftest passed

MAD pin 134 J225

( ExtSysResX))

Original, 11/97

Page 7

NSE­3 Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

Flash Programming (1)

Flash programming doesn't work
YES

If the fault information from the prommer is: a) MCU doesn't boot b) serial data line failure c) serial clock line failure connect:

connect watchdog disable (WDDIS) line (X001 pin 11) to the ground
OK

EEPROM (D240) pin 8 (VBB) 2.8 V J522 (VXO) 2.8 V
YES

NO

check WDDIS line: X001 pin 11 ­> N100 pin 29
OK

See section: Phone is totally dead check sleep clock circuitry (B100, R154...)

NO

check C213, R213
YES

J227 master reset (Purx) = "1" (2.8 V)
YES NO

J228 sleep clock(SCLK) square wave 32 kHz
YES

NO

J506 (RFC) 13 MHz 800 mV min
NO

MAD2 (D200) pin 93: 13 MHz sine wave clock signal: 500 mVpp min.
YES

Faulty circuit N100 or over loaded PurX line

check buffer V705 and VCXO G600

Check that following lines are correct: FCLK (MBUS) line: X001 pin 2 ­> D200 pin 112 FTX (fbus_tx) line: X001 pin 1 ­> D200 pin 104 FRX (fbus_rx) line: X001 pin 2 ­> D200 pin 109 check also pullup and pulldown resistors: R203, R201, R215 GND : X001 pin 7 ­> GND
OK

Enable the selftest function of D200 by connecting shortcircuit between testpoints J229 and J230

Connect an oscilloscope to testpoint J225 and switch power on
NO

Voltage level rises to "1" after power on at testpoint J225
YES

There is a shortcircuit somewhere in memory control lines or MCU address lines or MCU lower (7:0) data lines

There could be open pins in circuits D200 (D211, D240) If not, the PCB or D200 (D211, D240) is faulty

Page 8

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PAMS Technical Documentation

NSE­3 Disassembly & Troubleshooting Instructions

Flash Programming failure (2)

Flash progrmming doesn't work
YES

If the fault information from the prommer is: External RAM fault
YES

Check pins of SRAM (D220) Check control lines of SRAM: RAMSelX ...

Flash progrmming doesn't work
YES

If the fault information from the prommer is: Algorithm file or alias ID don't find, ID is unknown etc.
YES

Check pins of FLASH (D210) Check control lines and upper data lines (15:8) of FLASH: ROM1SelX...

Flash progrmming doesn't work
YES

If the fault information from the prommer is: MCU flash Vpp error
YES

Check connection between X001; 10 ­­> D210; 13 Check components C212, R211
OK

Faulty component D210

Original, 11/97

Page 9

NSE­3 Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

Flash Programming failure (3)

Flash programming doesn't work
YES

If the fault information from the prommer is: a) MCU doesn't boot b) serial data line failure c) serial clock line failure connect:

connect the shortcircuit fire from N100 pin 29 to ground (watchdog)
OK

EEPROM (D240) pin 8 (VBB) 2.8 V J522 (VXO) 2.8 V
YES

NO

VBAT is correct 3.6 V

YES

N100 is faulty

NO

check C213, R213
YES

J227 master reset (Purx) = "1" (2.8 V)
YES NO

J228 sleep clock(SCLK) square wave 32 kHz
YES

NO

check sleep clock circuitry (B100, R154...)

J506 (RFC) 13 MHz 800 mV min
NO

MAD2 (D200) pin 93: 13 MHz sine wave clock signal: 500 mVpp min.
YES

Faulty circuit N100 or over loaded PurX line

check buffer V705 and VCXO G600

Check that following lines are correct: FCLK (MBUS) line: X100 pin 11 ­> D200 pin 112 FTX (fbus_tx) line: X100 pin 13 ­> D200 pin 104 FRX (fbus_rx) line: X100 pin 12 ­> D200 pin 109 check also pullup and pulldown resistors: R203, R201, R215 GND : X100 pin 14 ­> GND
OK

Enable the selftest function of D200 by connecting shortcircuit between testpoints J229 and J230

Connect an oscilloscope to testpoint J225 and switch power on
NO

Voltage level rises to "1" after power on at testpoint J225
YES

There is a shortcircuit somewhere in memory control lines or MCU address lines or MCU lower (7:0) data lines

There could be open pins in circuits D200 (D211, D240) If not, the PCB or D200 (D211, D240) is faulty

Page 10

Original, 11/97

PAMS Technical Documentation

NSE­3 Disassembly & Troubleshooting Instructions

Flash Programming failure (4)

Flash progrmming doesn't work
YES

If the fault information from the prommer is: External RAM fault
YES

Check pins of SRAM (D220) Check control lines of SRAM: RAMSelX ...

Flash progrmming doesn't work
YES

If the fault information from the prommer is: Algorithm file or alias ID don't find, ID is unknown etc.
YES

Check pins of FLASH (D210) Check control lines and upper data lines (15:8) of FLASH: ROM1SelX...

Flash progrmming doesn't work
YES

If the fault information from the prommer is: MCU flash Vpp error
YES NO NO

Vpp > 4.5 V in D210 pin 13 (or C212)
YES

Vpp > 4.5 V in testpoint J221
YES

Check regulator N201

Check components C212, R211
OK

Check UI connector X300

Faulty component D210

Original, 11/97

Page 11

NSE­3 Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

Power doesn't stay on, or phone is jammed
If this kind of fault has come after flash programming, there are most probably open pins in ICs. The soldered joints of ICs: D200 (MAD2), D210 (FLASH), N100 (CCONT), D221 (SRAM) are useful to check at first. Normally the power will be switched of by CCONT (N100) after 30 seconds, if the watchdog of the CCONT can not be served by software. The watchdog updating can be seen by oscilloscope at pin 50 (DataselX) of CCONT. In normal case there is a short pulse from "1" ­> 0 every 8 seconds. The power off function of CCONT can be prevented by connecting a short circuit wire from CCONT pin 29 to ground.

Power doesn't stay on or phone is jammed
YES

CCONT watchdog is served? (pin 50 pulses 1 ­> 0)

YES

software is able to run check UI module If power is switched off after few seconds, check BSI and BTEM lines

NO

connect the shortcircuit fire from N100 pin 29 to ground (watchdog)
OK

EEPROM (D240) pin 8 (VBB) 2.8 V J522 (VXO) 2.8 V
YES

NO

VBAT is correct 3.6 V

YES

N100 is faulty

NO

check C213, R213
YES

J227 master reset (Purx) = "1" (2.8 V)
YES NO

J228 sleep clock(SCLK) square wave 32 kHz
YES

NO

check sleep clock circuitry (B100, R154...)

J506 (RFC) 13 MHz 800 mV min
NO

MAD2 (D200) pin 93: 13 MHz sine wave clock signal: 500 mVpp min.
YES

Faulty circuit N100 or over loaded PurX line

check buffer V705 and VCXO G600

Open pins or faulty circuit: D200, D210, D221, N100 R215

Page 12

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PAMS Technical Documentation

NSE­3 Disassembly & Troubleshooting Instructions

Display Information: Contact Service
This fault means that software is able to run and thus the watchog of CCONT (N100) can be served. Selftest functions are run when power is switched on and software is started to excute from flash. If any of selftests is failed, contact service information will be shown on display.

The phone doesn't register to the network or phone doesn't make a call
If the phone doesn't register to the network or the phone doesn't make a call, the reason could be either the baseband or the RF part. The phone can be set to wanted mode by WinTesla service software and determinate if the fault is in RF or in baseband part (RF interface measurements). The control lines for RF part are supplied both the System Asic (MAD2;D200) and the RFI (Cobba; N250). MAD2 handles digital control lines ( like synthe, TxP etc.) and Cobba handles analog control lines (like AFC, TxC etc.). The DSP software is constructed so that operation states of DSP (MAD2) can be seen in external flag (DSPXF) output pin (D200 pin 91). After power up, DSP signals all completed functions by changing the state of the XF pin (see figures 39 and 40).

1. DSP initialization done 2.Synchronization to network done 3. Registrarition to network done. 1 2 3

MAD2 pin 91 (DSPXF) J222

Original, 11/97

Page 13

NSE­3 Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

1
init initialize dsp constants download patch code download

initialization done

MAD2 pin 91 (DSPXF) J222

2
PSW search

last PSW OK

channel scan starts

synchronization OK

MAD2 pin 91 (DSPXF) J222

3

send RACH RACH OK

go SDCCH imediate assigment OK

MAD2 pin 91 (DSPXF) J222

Page 14

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PAMS Technical Documentation

NSE­3 Disassembly & Troubleshooting Instructions

Phone register failure
Phone doesn't register to the network or phone doesn,t make a call
YES NO

Analog supply voltage VCOBBA is >2.7 V at pin 7,12 ... of Cobba (N250)
YES

Check N100

Analog reference voltage Vref is 1.5 V at pin 9 of Cobba (N250)
YES

NO

Check R270, R271

Supply voltage VCP (N100 pin 32) > 4.8 V Supply voltage VRX (N100 pin 9) > 2.7 V Supply voltage VSYN_1 (N100 pin 15) > 2.7 V Supply voltage VSYN_2 (N100 pin 4) > 2.7 V during the receiving slot Supply voltage VTX (N100 pins 11, 20) > 2.7 V during the transmitting slot
YES

NO

Check N100, D200

Synthesizer lines: SEna (N620 pin 56), SClk (N620 pin 54) SData (N620 pin 55) pulses 0 ­> 1 during receiving slot
YES

NO

Check D200

RF control lines: RxC (N250 pin 18) 0 ­> 2.3 Vmax during receiving slot AFC (N250 pin 19) 0 ­ 1.2 V typ. during receiving slot
YES

NO

Check N250

Analog data signal RxIP (N250 pin 22) 0­> 1.5 V DC during receiving slot Analog data signal RxIN (N250 pin 22) 0­> 1.5 V DC during receiving slot Used benefit signal is biased to DC and its amplitude is 50 mVpp nominal and frequency is 13 MHz
YES NO

NO

Check N250 if DC is failed Check RF part if benefit signal is failed

DAX signal (N250 pin 48) pulses 1 ­> 0 during receiving slot
YES

Check N250 Check N250 if TxC is failed Check D200 if TxP is failed

RF control lines: TxC (N250 pin 17) 0 ­> 2.3 Vmax during transmit slot TxP (D200 pin 176) 0­>1 (2.8 V) during transmit slot
YES

NO

Analog data signals: TxIN (N250 pin 13) 0­> 0.8 V DC during transmit slot TxIP (N250 pin 14) 0 ­>0.8 V DC during transmit slot TxQN (N250 pin 15) 0 ­>0.8 V DC during transmit slot TxQP (N250 pin 16) 0 ­>0.8 V DC during transmit slot Used benefit signal is biased to DC and its amplitude is 300 mVpp nominal and frequency is 64 kHz

NO

Check N250

YES

Check RF part

Original, 11/97

Page 15

NSE­3 Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

SIM card is out of order
The hardware of the SIM interface from MAD2 (D200) to the SIM connector (X302) can be tested without SIM card. When the power is switched on and if the BSI line (X101;1) is grounded by resistor, all the used lines (VSIM, RST, CLK, DATA) rises up to 5 V four times. Thus "Insert SIM card" faults can be found without SIM card. The fault information "Card rejected" means that ATR message (the first message is always sent from card to phone) is sent from card to phone but the message is somehow corrupted, data signal levels are wrong etc. or factory set values (stored to the EEPROM) are not correct.

Page 16

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PAMS Technical Documentation

NSE­3 Disassembly & Troubleshooting Instructions

SIM Card failure
Insert SIM card fault
YES

Voltage level < 1.5 V at pin 95 of D200 when BSI resistor is connected
YES

NO

Check R120, R122, X101 C120, C160

VSIM, DATA, RESET and CLOCK lines rises up to 5 V after power on at pins of SIM card
NO

YES

Check SIM card and SIM reader connectors

VSIM(36), DATAO(43),SIMRSTO(42) and SIMCLKO(38) lines rises up to 5 V after power on at pins of N100 (CCONT)
NO

YES

Check X302, R124, R125, R128

SIMPWR(30), DATAA(44), SIMRSTA(40), SIMCLK(41) and SIMIOC(39) lines rises up to 2.8 V after power on at pins of N100 (CCONT)
NO

YES

faulty circuit N100 (CCONT)

SIMCardPwr(129), SIMCardData(120), SIMCardRstX(127), SIMCardClk(126) and SIMCardIOC(128) lines YES rises up to 2.8 V after power on at pins of D200 (MAD2)
NO

faulty PCB

Check again that voltage level at pin 95 (SIMCardDetX) of D200 is lower than 1.5V If it is, change D200

Card Rejected fault
YES

VSIM is according the specification VSIM = 2.8 V min (with 3 V SIM card) VSIM = 4.5 V min (with 5 V SIM card)
YES

NO

faulty circuit N100 (CCONT)

NO

The ATR data can be seen at pin 43 (CCONT, N100)
YES

Check X302, R124

The ATR data can be seen at pin 120 (MAD2, D200)
YES

NO

Check N100

NO

SIMIOControl line (N100 pin 36) is "1" during the ATR message
YES

Check D200

Check D200

Original, 11/97

Page 17

NSE­3 Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

Audio failure (1)

Uplink (microphone) and downlink (earphone) are broken
YES

Voltage at pin 107 of MAD2 (D200) is 2.8 V (without external audio devices) HOOKDET
YES

NO

Check R259, R260

Voltage at pin 108 of MAD2 (D200) is 2.8 V (without external audio devices) HEADDET
YES

NO

Check R257, R256, R261

Frequency at pin 138 of MAD2 (D200) is 1 MHz, square wave 2.8 Vpp
YES

NO

Check N250 (Cobba)

Frequency at pin 139 of MAD2 (D200) is 8 kHz, square wave pulses 2.8 Vpp

NO

Check N250 (Cobba)

Uplink (microphone) is broken
YES

Voltage at pin 6 of X100 is 1.8 V Voltage at pin 7 of X100 is 0.3 V during a call
YES

NO

Check microphone, X100 and micbias components V250... If OK, check that micbias control line is (D200 pin1 ) 2.8 V during a call

DC voltage at pins 59 and 60 of N250 is 1.4 V during a call
YES

NO

Check N250 (Cobba)

Analog audio signal (few millivolts) at pins 59 and 60 of N250 during a call
YES

NO

Check C262, C263 and PCB routings

Digital PCM data at pin 137 of MAD2 (D200) during a call

NO

Check N250 (Cobba)

Page 18

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PAMS Technical Documentation

NSE­3 Disassembly & Troubleshooting Instructions

Audio failure (2)

Downlink (earphone) is broken
YES

Digital PCM data at pin 52 of Cobba (N250) during a call
YES

NO

Check D200 (MAD2)

DC voltage at pins 5 and 6 of N250 is 1.4 V during a call
YES

NO

Check N250 (Cobba)

Analog audio signal (some ten millivolts) at pins 5 and 6 of N250 during a call

NO

Check N250 (Cobba)

Original, 11/97

Page 19

NSE­3 Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

Charger failure

Nothing happens when charger is connected
YES

Voltage level at pin 60 of CCONT (N100) is higher than 0.4 V when charger is connected
YES

NO

Check X100, F100, L104 R104, R103

Check N100

Display Information: Not charging
YES

Voltage level at pin 62 of CCONT (N100) is about 0.8 V when power is connected BSI resistor value should be 39 k
YES

NO

Check X101, R120, R122

Voltage level at pin 63 of CCONT (N100) is about 0.5 V when power is connected BTEMP resistor value should be 47 k
YES

NO

Check X101, R120, R122

NO

32 Hz square wave frequency at pin 7 of CHAPS (N101)
YES

Check N100

Voltage levels at pins 5 and 12 of CHAPS (N101) are same as VB
YES

NO

Check R131, N101

Voltage levels at pins 5 and 12 of CHAPS (N101) rises when charger is connected

NO

Check N101

Page 20

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PAMS

Receiver Fault (1)

Technical Documentation

Original, 11/97
Receiver Fault NO Duplexer ant­pin, SL: ­58 dBm NO N500 pin 25, loading > 1 M N500 pin 25, SL: ­61 dBm YES YES Check soldered joints of X540 and Z550, check also that X540 is assembled correct, if OK Change Z550 YES YES Change X540 Loading between X540 pin 1 and 2 ~ 0 NO NO N500 pin 23, SL: ­38 dBm YES NO Z500 input, loading > 1 M YES Check C500 soldered joints, if OK change it NO Z500 output, SL: ­47 dBm YES N500 pin 16, 1.5V YES N500 pin 7 and 8, SL: ­57 dBm YES NO N500 pin 7 and 8, loading 50 YES NO Z500 output, loading > 1 M YES Change Z500 YES NO Check C518, C504, if OK cange Z500 Z500 input, SL: ­44 dBm YES NO Check soldered joints, if OK change Z500 YES Check soldered joints of C516, C520 check internal coils YES 1st IF 71 MHz Rise up N500 pin 7,8. If level back to normal change N500 Change N500

Check C506, if OK change N500

NO

Change duplexer

NO

Duplexer Rx­pin, SL: ­61 dBm

NO

N500 pin 26, loading > 1 M YES

NO

N500 pin 26 is "HIGH"

Check PDATA0­line for short circuits

Check PDATA0­line D200 pin 171

NO

Check VRX(J510) and VSYN_1(J516) lines from CCONT

N500 pin 17 and 19, 2.8V

Check VREF_2(J518) voltage line

NO

NO

Check soldered joints of N500 and R504, if OK change R504

N500 pin 20, loading 10 k

NO

Check components in line out of pin 23, if OK change N500

N500 pin 23, loading 10 k

NSE­3

Disassembly & Troubleshooting Instructions

Page 21

NSE­3

Receiver Fault (2)

Page 22
1st IF 71 MHz N500 pin 12, 1018 MHz SL: ­28 dBm YES Check connections from G530 to N500 pin 12 NO N500 pin 9 and 10, SL: ­28 YES Z621 input 1 and 2, SL: ­30 YES NO Z621 input 1 and 2, loading > 1 M YES Check components in input line to Z621 NO Check input for short circiuts, if OK change Z621 YES NO G530 Out, 1018 MHz SL: ­28 dBm NO UHFLO YES Z621 output, SL: ­43 YES NO N620 pin 51(J530) and 52(J532), SL: ­43 YES YES NO Z621 ouput 1 and 2, loading > 1 M YES NO Check output for short circiuts, if OK change Z621 Check components in output line. Check soldered joints at N620, if OK change Z621 2nd IF 13 MHz

NO

Check VRX(J510) and soldered joints

N500 pin 6, 2.8V

NO

Check R504

N500 pin 15, loading 10 k YES

Disassembly & Troubleshooting Instructions

Rise up 9 and 10, if loading OK at pads change N500

NO

N500 pin 9 and 10, loading 10 k YES

Change N500

Checkof N620 joints soldered

NO

N620 pin 47, 2.8V

NO

N620 pin 51 and 52, loading 5 k YES

NO

N620 pin 51 and 52, DC­level ~1.7V YES

Technical Documentation

Original, 11/97

Check N620 pin 51 and 52 for short circuit

Change N620

PAMS

PAMS

Receiver Fault (3)

Technical Documentation

Original, 11/97
2nd IF 13 MHz N620 pin 8(J542), SL: ­ 28 dBm VHFLO YES N620 pin 44, SL: ­ 19 dBm YES NO Z620 input(J540), SL: ­26 dBm YES YES Change N620 NO Z620 output(J538), SL: ­28 dBm YES N620 pin 34, SL: ­36 dBm and pin 35, SL: ­33 dBm YES N620 pin 29 and 30, SL: ­ 29 dBm YES NO N250 pin 22 and 23, SL: ­29 dBm YES NO N620 pin 29 and 30, DC­level ~1V YES NO Change N620 N620 pin 53(J554), ~1.2V NO YES Check RXC control voltage from COBBA pin 18 NO N620 pin 47(J510), ~2.8V NO Check VRX supply voltage NO NO Check soldered joints at N620 and N250, if OK change N620 COBBA

Check R626 and soldered joints

Check soldered joints, if OK change Z620

Change N620

NO

N620 pin 34 and 35, DC­level, ~1.4V YES

Check R628 and R629

Check connections between N620 and N250

NSE­3

Disassembly & Troubleshooting Instructions

Page 23

NSE­3 Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

Receiver Fault (4)

COBBA

N250 pin 7,12,21,25 and 63, ~2.8V YES N250 pin 27 and 53, ~2.8V YES N250 pin 9, ~1.5V YES N250 pin 10, loading 100 k YES N250 pin 45, 13 MHz clock OK YES N250 pin 28, is "HIGH" YES Check data and adress lines between D200 and N250, if OK change N250 COBBACLK ­ signal: Oscilloscope picture in Appendix A

NO

Check VCOBBA­voltage from CCONT pin 22

NO

Check VBB­voltage from CCONT pin 55 Check VREF­voltage from CCONT pin 13 through R253 Check soldered joints and R253 Check COBBACLK­line from MAD pin 144

NO

NO

NO

NO

Check COBBARSTX­line from MAD pin 163

Page 24

Original, 11/97

PAMS Technical Documentation

NSE­3 Disassembly & Troubleshooting Instructions

Receiver Fault (5)

UHFLO

NO G530 VCC­pin voltage, 2.8V YES NO G530 VC(J500) voltage ~2.25V (Mid CH) YES Change G530 Check soldered joints in VC­line at G530, N620 and components YES Does G530 oscillate at any frequency YES N620 pin 21, 13 MHz clock YES N620 pin 9,22 and 25, 2.8V YES N620 17 and 28, 5V YES NO Check VCP­voltage from CCONT pin 32 NO Check VSYN_2(J508) from CCONT and CNTVR3­control from MAD NO Change G530 Check VSYN_1­line and R530

NO

Check C633 and soldering joints at N620

N620 pin 58, 1.5V YES

NO Check VREF_1­line

NO N620 pin 59, loading 15 k YES SCLK,working OK SDATA, SENA1 YES Change N620 NO

Check soldering joints at N620 and R635, if OK change R635 Check SCLK, SDATA, SENA1­lines from MAD

13 MHz clock oscilloscope picture in Appendix A SCLK, SDATA, SENA1 oscilloscope pictures in Appendix B

Original, 11/97

Page 25

Receiver Fault (6)

NSE­3

Page 26
VHFLO N620 pin 18, ~2.3V NO Does the VCO oscillate at any NO frequency ? YES N620 9,22 and 25, ~2.8V YES NO N620 17 and 28, ~5V YES Change N620 Check VCP voltage line NO Check VSYN_2(J508) supply voltage V581 collector, ~2.6V YES V581 base, ~1.7V YES NO Check R581, R585 and soldered joints NO Check VSYN_1(J516) supply voltage line to V581 V581 emitter, ~1V YES NO V581 emitter loading ~330 if OK change V581,

Disassembly & Troubleshooting Instructions Technical Documentation

Original, 11/97

Check V580, L581, C582, C583

PAMS

Technical Documentation

Receiver Fault (7)

Original, 11/97 Page 27

PAMS

AFC

RSSI tuning working OK ? YES

NO

Receiver Fault

NO N250 pin 19, voltage between 0.5 ­ 2.3V YES Set SpectrumAnalyzer Frequency: 13 MHz Span: 10 kHz RESBW: 3 kHz

N250 pin 19, loading > 1 M YES Change N620

NO

Check AFC­line(J520) for short circuits, if OK change

Disassembly & Troubleshooting Instructions

13 MHz in midst, (Test point J 506)

NO Use sevice software to set AFC to MAX

NOTE ! If DSP in MAD does not work properly, supply voltages stays down.

AFC­voltage(J520), NO ~2.3V YES Main clock(J506), > 13 MHz NO

Check R600 and C602, if OK change N250

NSE­3

Change G600

NSE­3

Transmitter Fault (1)

Page 28
Transmitter Fault TXLEV 5 N620 pin 8(J542) 232 MHz SL: ­28 dBm NO VHFLO YES N620 pin 61 and 62, 116 MHz SL: ­40 dBm YES NO N500 pin2(J552) and pin3 (J550) 116 MHz SL: ­32 dBm YES N620 pin 63(J514), VTX­pulse OK ? YES N620 pin 11, TXC­pulse OK? NO N500 pin 12(RX­Continous), SL: ­28 dBm YES NO N500 pin 30, SL: ­18 dBm YES YES N620 pin 59, loading 15 k YES N620 pin 61 and 62, ~0.8V NO Check R635 and soldered joints NO YES N620 pin 58, ~1.5V NO Check VREF_1 ­ line NO N620 pin 1, TXP­pulse OK? YES NO N620: TXQP, TXQN, TXIP and TXIN, OK ? YES NO NO Check TXQP, TXIP, TXQN, TXIN lines from COBBA pin 13...16 and soldered joints at N620 and N250, if OK change N250(Test pins J558 & J560) Check TXP­line from MAD Check VTX supply voltage from CCONT NO Check TXC­line from COBBA UHFLO Change N620 TXQP, TXIP, TXIN, TXQN, TXP and VTX: Oscilloscope pictures in Appendix C Transmitter 1 YES

Check N500 pin 2 and 3 for short circuits, if OK change N500

NO

N500 pin 2 and 3, loading > 1M YES

Disassembly & Troubleshooting Instructions

Check C652, C653, C655, L623, L624, R623, R625, if OK change N500

Check VTX supply voltage from CCONT

NO

N500 pin 1 and 29, ~2.8V YES

NO

Check VREF_2 ­ line(J518)

N500 pin 16, ~1.5V YES

Check R504 and soldered joints

NO

N500 pin 20, loading 10 k

Technical Documentation

Original, 11/97

Change N500

PAMS

Technical Documentation

Transmitter Fault (2)

Original, 11/97
Check Z505 output for short NO circuits, if OK change Z505 Z505 output, loading > 1 M YES Change Z505 NO Check VBATT­connections to NO N550 Check soldered joints at N550 NO N550 pin 2,4,6,12,13 and 14 ~3.6V YES N550 pin 1 and 16, VTX­pulse YES N550 pin 9, power control pulse YES Check C564,C505,C566,C572,C555,C 567,L552, if OK change N550 VTX and power contol pulse(TXC): Oscilloscope pictures in Appendix D NO Check soldered joints at N550 NO and N620, if OK change N620

PAMS

Transmitter 1 TXLEV5

Z505 input, SL: ­ 23 dBm YES Z505 output, SL: ­29 dBm YES N550 pin 8, SL: ­29 dBm YES N550 pin 13, SL: ­2 dBm YES Duplexer TX­pin, SL: 6 dBm YES

NO

Z505 input, loading > 1 M YES Check C700 Check V640 limiter circuit DC­levels(VTX­voltage), Base: ~0.6V Collector: ~0.6V Emitter: ~0.3V

NO

Check Z505 input for short circuits, if OK change Z505

NO

Check R668, R662, R664, R666, R670, C660, C662 and C562, If OK change V640

Disassembly & Troubleshooting Instructions

NO

Check components in line from N550 to Z550. Also check for short circuits, if OK change Z550

RF­connector X540 pin 1, SL: 5 dBm

NO

Check X540, if OK change Z550

Page 29

NSE­3

NSE­3 Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

Transmitter Fault (3)

Power Control TXLEV5

NO Transmitter working OK YES N250 pin 11, TXC ­ pulse OK YES N620 pin 11 and 12 pulses are about the same NO NO

Transmitter Fault

Check TXC ­ line from N250 pin 17, if OK change N250

V550 anode, DC­voltage ~0.8V YES

NO

Check VSYN_1 voltage through R550, R551 and R552

N620 pin 12, loading ~4 k YES

NO

Check C632, if OK change N620

Check C554, R553 and R554, if OK change V550

TXC ­ pulse: Oscilloscope picture in Appendix D

Page 30

Original, 11/97

PAMS Technical Documentation

NSE­3 Disassembly & Troubleshooting Instructions

Appendix A

Picture 1. COBBACLK ­ signal

Picture 2. 13 MHz Main clock ­ signal

Original, 11/97

Page 31

NSE­3 Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

Appendix B

Picture 3. SCLK ­ signal

Picture 4. SDATA ­ signal

Picture 5. SENA1 ­ signal

Page 32

Original, 11/97

PAMS Technical Documentation

NSE­3 Disassembly & Troubleshooting Instructions

Appendix C

Picture 6. TXQP, TXQN, TXIP and TXIN ­ signal

Picture 7. TXP ­ signal

Picture 8. VTX ­ signal Original, 11/97

Page 33

NSE­3 Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

Appendix D

Picture 9. TXC ­ signal (TXLEV5)

Picture 10. DET ­ signal(N620 pin 12) TXLEV5

Page 34

Original, 11/97

PAMS Technical Documentation

NSE­3 Disassembly & Troubleshooting Instructions

This page intentionally left blank.

Original, 11/97

Page 35