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ORDER NO. MD0601012C2
CD Stereo System
SA-AK640E SA-AK640EB SA-AK640EG
Colour (S)... Silver Type
Notes: This model's CD mechanism changer unit is CRS1. Please refer to the original Service Manual (Order No. MD0509368C0) for this mechanism.
Specifications
n AMPLIFIER SECTION RMS output power THD 10%, 1 kHz (Low channel-both channels driven) 90 W per channel (3 ) 10 kHz (High channel-both channels driven) 90 W per channel (3 ) 60 Hz (Subwoofer channel) Total output power n FM/AM TUNER, TERMINALS SECTION Preset station Frequency Modulation (FM) Frequency range 87.50 to 108.00 MHz (50 kHz steps) Sensitivity S/N 26dB Antenna terminal(s) Amplitude Modulation (AM) Frequency range Sensitivity S/N 20dB (at 999 kHz) 560 µV/m 522 to 1629 kHz (9 kHz step) 4.0 µV (IHF) 2.2 µV 75 (unbalanced) n DISC SECTION Disc played [8 cm or 12 cm] (1) CD-Audio (CD-DA) (2) CD-R/RW (CD-DA, MP3, WMA formatted disc) (3) MP3/WMA FM 15 stations AM 15 stations 180 W (8 ) 540 W Music Port input jack Terminal Sensitivity Phone jack Terminal n CASSETTE DECK SECTION Track system Heads Record/playback Erasure Motor Recording system Erasing system Tape speed Overall frequency response (+3, -6 dB) at DECK OUT NORMAL S/N ratio Wow and flutter Fast forward and rewind time 35 Hz to 14 kHz 50 dB (A weighted) 0.18 % (WRMS) Approx. 120 seconds with C-60 cassette tape Solid permalloy head Double gap ferrite head DC servo motor AC bias 100 kHz AC erase 100 kHz 4.8 cm/s 4 track, 2 channel Stereo, 3.5 mm jack Stereo, 3.5 mm jack 100 mV, 4.7 k
© 2006 Matsushita Electric Industrial Co. Ltd.. All rights reserved. Unauthorized copying and distribution is a violation of law.
SA-AK640E / SA-AK640EB / SA-AK640EG
Bit rate MP3, WMA Sampling frequency MP3/WMA CD-DA Decoding Digital filter D/A converter Pick up Wavelength Beam Source Audio output (Disc) Number of channels n GENERAL Power supply For E/EG only For EB only Power consumption Power consumption in standby mode Dimensions (W x H x D) AC 230 V, 50Hz AC 230 to 240 V, 50Hz 128 W 0.5 W 250 x 330 x 343 mm 2 (Stereo) (FL,FR) 780 nm Semiconductor laser 32 kHz, 44.1 kHz, 48 kHz 44.1 kHz 16 bit linear 8 fs MASH (1 bit DAC) 32 kbps to 320 kbps
Mass Operating temperature range Operating humidity range n SYSTEM SC-AK640 (E)
7.1 kg +5 to +35°C 5 to 90% RH (no condensation) Music center: SA-AK640 (E) Speaker: SB-AK640 (EG) Subwoofer: SB-WAK640 (EG)
SC-AK640 (EB)
Music center: SA-AK640 (EB) Speaker: SB-AK640 (EG) Subwoofer: SB-WAK640 (EG)
SC-AK640 (EG)
Music center: SA-AK640 (EG) Speaker: SB-AK640 (EG) Subwoofer: SB-WAK640 (EG)
For information on speaker system, please refer to the original Service Manual (Order No. MD0601006C2) for SB-AK640EG and (Order No. MD0601007C2) for SB-WAK640EG. Notes: 1. Specifications are subject to change without notice. Mass and dimensions are approximate. 2. Total harmonic distortion is measured by the digital spectrum analyzer.
CONTENTS
Page
1 Safety Precautions 1.1. General Guidelines 1.2. Caution for AC Mains Lead 1.3. Before repair and adjustment 1.4. Protection Circuitry 2 Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices 3 Handling Precautions For Traverse Deck 4 Precaution of Laser Diode 5 Handling the Lead-free Solder 5.1. About lead free solder (PbF) 6 New Features 6.1. CRS1 Mechanism Overview 6.2. Music Port 7 Accessories 8 Operating Instructions Procedures 9 Self diagnosis and special mode setting 9.1. Special Mode Table 9.2. Error code Table 10 Assembling and Disassembling 10.1. Caution 10.2. Disassembly flow chart 10.3. Main Parts Location 10.4. Disassembly of Top Cabinet 6 7 8 9 9 10 10 12 13 14 16 16 18 22 22 23 24 25 4 4 5 5 6 10.5. Disassembly of Rear Panel 10.6. Disassembly of CD Changer Unit (CRS1) 10.7. Disassembly of Main P.C.B. 10.8. Disassembly of Transformer P.C.B. 10.9. Disassembly of Power P.C.B. 10.10. Disassembly of Front Panel Unit 10.11. Disassembly for Panel P.C.B. 10.12. Disassembly of Deck mechanism unit 10.13. Disassembly of Deck P.C.B. 10.14. Disassembly of Traverse Unit 10.15. Disassembly of optical pickup unit (CD mechanism) 10.16. Disassembly of Deck Mechanism 10.17. Replacement for cassette lid 10.18. Rectification for tape jam problem 11 Service Fixture and Tools 12 Service Positions 12.1. Checking and Repairing of Main P.C.B. 12.2. Checking and Repairing of Transformer P.C.B. 12.3. Checking and Repairing of Panel, Deck & Deck Mechanism P.C.B. 12.4. Checking and Repairing of Power P.C.B. 13 Adjustment Procedures 13.1. Cassette Deck Section 13.2. Tuner Section 42 43 44 44 45
Page
25 25 27 27 28 29 30 31 31 31 33 36 38 39 40 40 40 41
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14 Voltage and Waveform Chart 14.1. CD Servo P.C.B. & Main P.C.B. 14.2. Power P.C.B. & Transformer P.C.B. 14.3. Waveform Chart 15 Wiring Connection Diagram 16 Block Diagram 17 Schematic Diagram 17.1. Notes of Schematic Diagrams 17.2. (A) CD Servo Circuit 17.3. (B) Main (Tuner) Circuit 17.4. (B) Main Circuit 17.5. (C) Panel Circuit 17.6. (D) Transformer Circuit 17.7. (H) Power Circuit 17.8. (F) Deck Circuit & (G) Deck Mechanism Circuit 18 Printed Circuit Board 18.1. (A) CD Servo P.C.B.
47 47 49 50 52 53 57 57 59 61 63 67 69 71 75 77 78
18.2. (B) Main P.C.B. 18.3. (C) Panel P.C.B. 18.4. (D) Transformer P.C.B. 18.5. (E) Power P.C.B. 18.6. (F) Deck P.C.B. & (G) Deck Mechanism P.C.B. 19 Illustration of ICs, Transistors and Diodes 20 Terminal Function of IC's 20.1. IC7001 (MN6627954MA) Servo Processor,Digital Signal Processor/Digital filter and D/A Converter 20.2. IC7002 (BA5948FPE2) IC 4CH Drive 20.3. IC2801 (C2CBYY000066) System Microprocessor 21 Exploded Views 21.1. Cabinet Parts Location 21.2. Deck Mechanism Parts Location (RAA4502-S) 21.3. Packaging 22 Replacement Parts List
79 80 81 82 83 85 86 86 87 87 89 91 93 95 97
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1 Safety Precautions
1.1. General Guidelines
1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. 2. After servicing, ensure that all the protective devices such as insulation barriers and insulation papers shields are properly installed. 3. After servicing, check for leakage current checks to prevent from being exposed to shock hazards.
1.1.1.
Leakage Current Cold Check
1. Unplug the AC cord and connect a jumper between the two prongs on the plug. 2. Using an ohmmeter measure the resistance value, between the jumpered AC plug and each exposed metallic cabinet part on the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the chassis, the reading should be between 1M and 5.2M. When the exposed metal does not have a return path to the chassis, the reading must be .
Fig. 1
1.1.2.
Leakage Current Hot Check (See Figure 1)
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check. 2. Connect a 1.5k, 10 watts resistor, in parallel with a 0.15µF capacitor, between each exposed metallic part on the set and a good earth ground such as a water pipe, as shown in Figure 1. 3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor. 4. Check each exposed metallic part, and measure the voltage at each point. 5. Reverse the AC plug in the AC outlet and repeat each of the above measurements. 6. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) may be used to make the hot checks, leakage current must not exceed 1/2 milliamp. Should the measurement is out of the limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to the customer.
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1.2.
Caution for AC Mains Lead
1.3.
Before repair and adjustment
Disconnect AC power, discharge Power Capacitors C5101, C5104, C5171, C5172, C5920, C5940 and C5950 through a 10, 5W
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SA-AK640E / SA-AK640EB / SA-AK640EG
resistor to ground. DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices. After repairs are completed, restore power gradually using a variac, to avoid overcurrent. Current consumption at AC 240V, 50 Hz in NO SIGNAL mode (volume min at CD mode) should be ~ 350mA.
1.4.
Protection Circuitry
The protection circuitry may have operated if either of the following conditions are noticed: · No sound is heard when the power is turned on. · Sound stops during a performance. The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are "shorted", or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used. If this occurs, follow the procedure outlines below: 1. Turn off the power. 2. Determine the cause of the problem and correct it. 3. Turn on the power once again after one minute. Note : When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.
2 Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage caused by electro static discharge (ESD). 1. Immediately before handling any semiconductor component or semiconductor-equiped assembly, drain off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equiped with ES devices, place the assembly on a conductive surface such as aluminium foil, to prevent electrostatic charge build up or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ES devices. 4. Use only an anti-static solder remover device. Some solder removal devices not classified as "anti-static (ESD protected)" can generate electrical charge to damage ES devices. 5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminium foil or comparable conductive material). 7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. Caution Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize body motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to damage an ES device).
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3 Handling Precautions For Traverse Deck
The laser diode in the traverse deck (optical pickup) may break down due to potential difference caused by the static electricity of clothes or our human body. So, be careful of electrostatic breakdown during repair of the traverse deck (optical pickup). · Way of handling the traverse deck (optical pickup) 1. Do not subject the traverse deck (optical pickup) to static electricity as it is extremely sensitive to electrical shock. 2. To prevent the breakdown of the laser diode, an antistatic shorting pin is inserted into the flexible board (FFC board). 3. Do not to apply excessive stress to the flexible board (FFC board). When removing or connecting the short pin, finish the job in as short time as possible. 4. Do not turn the variable resistor for laser power adjustment. (It is pre-adjusted during production time)
Grounding for electrostatic breakdown prevention 1. Human body grounding Use the anti-static wrist strap to discharge the static electricity from your body. 2. Work table grounding Put a conductive material (sheet) or steel sheet on the area where the traverse deck (optical pickup) is place, and ground the sheet. Caution : The static electricity of your clothes will not be grounded through the wrist strap. So, take care not to let your clothes touch the traverse deck (optical pickup). Caution when replacing the Traverse Deck The traverse deck has a short point shorted with solder to protect the laser diode against electrostatics breakdown. Be sure to remove the solder from the short point before making connections.
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4 Precaution of Laser Diode
Caution : This product utilizes a laser diode with the unit turned "ON", invisible laser radiation is emitted from the pick up lens. Wavelength : 780 nm Maximum output radiation power from pick up : 100 µW/VDE Laser radiation from pick up unit is safety level, but be sure the followings: 1. Do not disassemble the optical pick up unit, since radiation from exposed laser diode is dangerous. 2. Do not adjust the variable resistor on the pick up unit. It was already adjusted. 3. Do not look at the focus lens using optical instruments. 4. Recommend not to look at pick up lens for a long time. ACHTUNG : Dieses Produkt enthält eine Laserdiode. Im eingeschalteten Zustand wird unsichtbare Laserstrahlung von der Lasereinheit abgestrahlt. Wellenlänge : 780nm Maximale Strahlungsleistung der Lasereinheit :100 µW/VDE Die Strahlung an der Lasereinheit ist ungefährlich, wenn folgende Punkte beachtet werden: 1. Die Lasereinheit nicht zerlegen, da die Strahlung an der freigelegten Laserdiode gefährlich ist. 2. Den werkseitig justierten Einstellregler der Lasereinhit nicht verstellen. 3. Nicht mit optischen Instrumenten in die Fokussierlinse blicken. 4. Nicht über längere Zeit in die Fokussierlinse blicken. ADVARSEL: I dette a apparat anvendes laser. CAUTION!
THIS PRODUCT UTILIZES A LASER. USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.
n Use of caution label
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5 Handling the Lead-free Solder
5.1. About lead free solder (PbF)
Distinction of PbF P.C.B.: P.C.B.s (manufactured) using lead free solder will have a PbF stamp on the P.C.B. Caution: · Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher. Please use a high temperature soldering iron. In case of soldering iron with temperature control, please set it to 700 ± 20°F (370 ± 10°C). · Pb free solder will tend to splash when heated too high (about 1100°F/600°C). · When soldering or unsoldering, please completely remove all of the solder on the pins or solder area, and be sure to heat the soldering points with the Pb free solder until it melts enough.
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6 New Features
6.1. CRS1 Mechanism Overview
6.1.1.
General Feature
· This is a five disc changer mechanism for CD/DVD. The outline figure is shown below.
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· The mechanism has "CHANGE WHILE PLAY" function. It open other trays for disc exchanging while one tray is at PLAY position performing recording or reproducing. · The mechanism can quickly change all trays with "CHANGE ALL" function. All trays can be move to OPEN position with one operation. · There is no sensor to indicate presence of disc on any tray.
6.1.2.
Hardware composition
Function The switch is used to detect normal tray opening The switch is used for detect tray being manually push/trigger when full open Is used to detect cam gear home position Used for normal single tray closing Used to detect cam gear rotate to Play Driving position Detect TRV clamping complete position Detect tray completely transfer for play position to stocking position Detect TRV vertical movement position Detect a default position of TRV vertical movement position To drive Motor Main driving source for changer Switching the driving source from motor to: 1. Tray open/close 2. Drive tray to play/stock position and TRV vertical movement
· Below is the hardware components of the mechanism
Name Open Switch (OPEN-SW) Home Switch (HOME-SW) Close Sensor (CLOSE-SENSOR) Play Switch (PLAY-SW) Stocking Switch (STOCK-SW) UD Sensor (UD-SENSOR) Top Switch (TOP-SW) Driver IC Motor Plunger
6.1.3.
Mechanism Operation
· This mechanism has the following state: 1. Driving of a tray to open/close 2. Up/down operation of a traverse performs a state changes of tray. By using the plunger to lift/release of a switching gear, and the cam gear to lift/release the function gear the motor can be link to several gear trains to perform various operations. · The functions that can be perform in this mechanism are described as below:
Condition Open current playing tray Open All Stock Play Play & Open Tray-* Change Close All Explanation The state to change current playing disc. All tray will be open at once and current tray at PLAY position will be expose. The state where all trays being driven to OPEN position. The disc can be taken in or out from tray to tray by close tray one by one from top to bottom. The state where the trays are stored in STOCK position The state where one of the tray 5 trays is being driven to PLAY position and clamped by traverse unit The state where one of the tray is in playing position performing recording or reproducing, other trays can be used (OPEN position) for disc exchanging without stopping the recording or reproducing process. The state when one of the opened tray being driven from OPEN position to STOCK position and other opened trays remain still at OPEN position. The state where all open trays will being driven from OPEN position to STOCK position, one by one from top to bottom
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Note: * represent tray number (from 1 ~ 5)
6.1.4.
Note:
New CD Mechanism (CRS1)
This service manual does not contain the following information for the mention CD Mechanism drive: · Schematic Diagram, Block Diagram and P.C.B. layout of CD Loading P.C.B. · Part List for individual parts of the mechanism. · Exploded View and Parts List for individual parts of the CD Mechanism drive. Please refer to the original service manual (Order No. MD0509368C0) for the CD Mechanism Drive CRS1.
6.2.
Music Port
With reference to page 16 of the operating instruction manual.
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7 Accessories
Remote Control
FM Antenna Wire
AC Cord (For E/EG only)
AC Cord (For EB only)
AM Loop Antenna
Antenna Adaptor (For EB only)
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8 Operating Instructions Procedures
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9 Self diagnosis and special mode setting
This unit is equipped with functions for checking and inspecting namely: Self-Diagnostic and Test Mode.
9.1.
Special Mode Table
FL Display Key Operation Front Key 1. Select [
Item Mode Name Description Self -Diagnostic To enter into self Mode diagnostic checking for main unit.
] for TAPE mode (Ensure no tape is inserted). 2. Press and hold [ seconds follow by [ ]button for 3 ].
CD Test Mode
To enter into checking the reliability of changer unit.
button on To exit, press main unit or remote control. 1. Select [ ] for CD mode. 2. Press and hold [ seconds follow by [ ] button for 3 ].
CD Auto Adjustment
To check the CD auto adjustment result for FLOCK, TLOCK and CLVS.
button on To exit, press main unit or remote control. In CD Test Mode: 1. Press [0] button on the remote control. To exit, press main unit or remote control. button on
CD Changer Reliability Test (CRS1)
To determine the reliability of CD Changer Unit. (For more information, refer to section 9.1.1)
In Self-Diagnostic Mode: ] for CD mode. 1. Select [ 2. Press [ ] button. button on To exit, press main unit or remote control. (The tray will return to PLAY position and then power off) 1. In any mode: ] button on main unit 1. Press [ follow by [4] and [7] on remote control. To exit, press [ENTER] button on remote button on main control or unit or remote control. 2.
Doctor Mode
To enter into Doctor Mode for checking of various items and displaying EEPROM and firmware version.
1. All segments will light up for 1 second. 2. The Check Sum of EEPROM and firmware version will be display. * ROM correction ** Firmware version No: Cold Start To activate cold start upon next AC power up. In doctor mode: 1. Press [4] button on remote control. To exit, press [ENTER] button on remote button on main control or unit or remote control. In doctor mode: 1. Press [DISC] on remote control. To exit, press [ENTER] button on remote button on main control or unit or remote control.
Changer Reliability Test
To check the function operation of changer unit. (For more information, refer to 9.1.1)
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Item Mode Name Description FL Display Test To check the FL segments display (All segments will light up and LED will blink at 0.5 second interval) Tape Eject Test To check on the tape eject function (For deck 1/2)
FL Display
Key Operation Front Key In doctor mode: 1. Press [DIMMER] button on remote control.
In doctor mode: 1. Press [PROGRAM] button on remote control.
9.1.1.
CD changer unit ageing test mode
Below is the process flow chart of ageing for the CD changer unit. (CRS1)
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9.2.
Error code Table
Self-Diagnosis Function (refer Section 9.1) provides information on any problems occuring for the unit and its respective components by displaying the error codes. These error code such as U**, H** and F** are stored in memory and held unless it is cleared.
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The error code is automatically display after entering into self-diagnostic mode.
Error Code H01 Diagnosis Contents Description of error Mode SW, plunger and capstan motor abnormal Rec INH SW abnormal Automatic FL Display Remarks For deck mechanism unit (For deck 1/2). ] on main unit for Press [ next error. For deck mechanism unit (For deck 2). ] on main unit for Press [ next error. For deck mechanism unit (For deck 1/2). ] on main unit for Press [ next error. For deck mechanism unit (For deck 1/2). ] on main unit for Press [ next error.
H02
H03
HALF SW abnormal
F01
Reel pulse abnormal
F02
TPS error
F15
RESET SW abnormal Transmission error between CD Servo LSI IC and microprocessor IC
REST SW: ON is not detected within the specified time.
For CD unit (For Traverse). ] on main unit for Press [ next error. For CD unit (For Traverse). Press [ ] on main unit for next error.
F26
F61
IHMS
When set to CD mode, the sense signal does not turn "Low", a fail safe time after system command transmission is sent. Power Amp IC output Upon power on, abnormal PCONT=HIGH, DCDET=L after checking LSI. Cam gear Cam gear does not abnormality rotate to "HOME" position.
For power. Press [ next error.
] on main unit for
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
ICSL
Cam gear/gear units abnormal
Cam gear does not rotate to "PLAY" driving position and hence does not drive playing tray to "STOCK" position.
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
ISTK
Drive rack/gear assembly abnormal
The tray drive rack does not move to "STOCK" position. (Tray does not move to "STOCK" position)
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
IPLY
Drive rack/gear assembly abnormal
The tray drive rack does not move to "PLAY" position. (Tray does not move to "PLAY" position)
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
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Error Code ITOP
Diagnosis Contents Description of error UD assembly UD Rack does not move to front direction. This lead to UD base not raise to top position.
Automatic FL Display
Remarks For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
IUDS
UD assembly
After TOP SW is detected, UD rack does not move into tray 1 position.
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
HOME
Cam gear/gear assembly abnormal
Cam gear does not move to "HOME" position under following conditions 1. After tray is load to "PLAY" position. 2. After tray is unload to "STOCK" position.
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
LOAD
Tray drive assembly abnormal
Tray unit does not move from "STOCK" to "PLAY" position
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
PDRV
Cam gear/gear assembly abnormal
Cam gear does not move from "HOME" to "PLAY" drive position.
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
UDU
UD base asssembly abnormal UD base asssembly abnormal
UD Base assembly does not move upwards from tray 5 to tray 2 UD Base assembly does not move downwards from tray 1 to tray 5. UD Base assembly does not move to tray 1.
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error. For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error. For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error. For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
UDD
UD1
UD base asssembly abnormal
F1NG
Fail - safe mode. (For When the tray open open/close tray operation is performed, it unit(s)) fails to open. It will automatically close all trays after the time-out by the microprocessor. During this time when it fails, the error code will appear. Fail - safe mode. (For When the tray close open/close tray operation is performed, it unit(s)) fails to close. It will automatically open all trays after the time-out by the microprocessor. During this time when it fails, the error code will appear.
F2NG
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
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Error Code SRVC_TRV
Diagnosis Contents Description of error To unlock the 1. All trays set to traverse unit for "STOCK" position service 2. Mechanism set to tray 5 3. Cam gear set to "HOME" position During tray re-open, the cam gear will rotate in the opposite direction to reset the cam gearposition. When it fails, the error code will appear.
Automatic FL Display
Remarks For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit.
RSET
Cam gear jam/close sensor faulty
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
CRS1 Error Code display 1. The errors that occured in CRS1 Mechanism can be recalled and displayed, in the order of the occurence under self-diagnostic (Refer to Section 9.1 for procedures to enter this mode. · Only the first 5 errors will be memorized (in backup memory). The subsequence error shall be ignored and not memorize. For system with EEPROM as memory backup,memory space in EEPROM is neccesary. 2. To display all error code memorized In CRS1 Self-Diagnostic mode, press [SINGLE CHANGE] to display subsequence error code. It shall repeat after reaching error no. 5. e.g.: [1 _ _ _ _ I H M S] [SINGLE CHANGE] [2 _ _ _ _ I T O P] [SINGLE CHANGE] [3 _ _ _ _ H O M E] [SINGLE CHANGE] [4 _ _ _ _ L O A D] [SINGLE CHANGE] [5 _ _ _ _ _ U D D] [SINGLE CHANGE] 3. To clear the error code memory In CRS1 Self-Diagnostic mode, long press [SINGLE CHANGE] key (2s or more)
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10 Assembling and Disassembling
10.1. Caution
Special Note: This model uses a new CD changer unit CRS1. In this following section does not contain the necessary disassembly & assembly information for the CD changer unit (CRS1) except the disasembly & assembly of traverse unit. Kindly refer to the original service manual for the CD changer unit. (Order No. MD0509368C0). "ATTENTION SERVICER" Some chassis components may have sharp edges. Be careful when disassembling and servicing. 1. This section describes procedures for checking the operation of the major printed circuit boards and replacing the main components. 2. For reassembly after operation checks or replacement, reverse the respective procedures. Special reassembly procedures are described only when required. 3. Select items from the following index when checks or replacement are required. 4. Refer to the Parts No. on the page of "Parts Location and Replacement Parts List" (Section 22), if necessary. Warning :This product uses a laser diode. Refer to caution statement Precaution of Laser Diode. Caution: After replacing of CD Changer Unit, ageing test is necessary. Please confirm operation for CD Changer Unit.
Below is the list of disassembly sections · Disassembly of Top Cabinet · Disassembly of Rear Panel · Disassembly of CD Changer Unit · Disassembly of Main P.C.B. · Disassembly of Transformer P.C.B. · Disassembly of Power P.C.B. · Disassembly of Front Panel Unit · Disassembly of Panel P.C.B. · Disassembly of Deck Mechanism Unit · Disassembly for Deck P.C.B. · Disassembly of Traverse Unit · Disassembly of Optical Pickup Unit (CD Mechanism) · Disassembly of Deck Mechanism · Replacement for cassette lid · Rectification for tape jam problem
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SA-AK640E / SA-AK640EB / SA-AK640EG
10.2. Disassembly flow chart
The following chart is the procedure for disassembling the casing and inside parts for internal inspection when carrying out the servicing. To assemble the unit, reverse the steps shown in the chart as below.
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SA-AK640E / SA-AK640EB / SA-AK640EG
10.3. Main Parts Location
24
SA-AK640E / SA-AK640EB / SA-AK640EG
10.4. Disassembly of Top Cabinet
Step 1 Remove 3 screws at each side and 5 screws at rear panel. Step 2 Lift up both sides of the top cabinet, push the top cabinet towards the rear to remove the top cabinet.
10.5. Disassembly of Rear Panel
· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet Step 1 Remove 6 screws. Step 2 Disconnect cable CN2810 (Fan) at Main P.C.B.. Step 3 Remove rear panel.
10.6. Disassembly of CD Changer Unit (CRS1)
· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet Step 1 Remove 1 screw at rear panel.
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SA-AK640E / SA-AK640EB / SA-AK640EG
Step 2 Detach the FFC cables (CN2801 & CN2805).
Step 4 Lift the CD changer unit upwards to remove it. · Disassembly of Mecha Chassis
Step 3 Release the claws on both ends.
Step 5 Remove 2 screws. Step 6 Remove the Mecha Chassis. Note: For disassembly & assembly of traverse unit, please refer to section 10.14 of this service manual.Please refer to original Service Manual for the Disassembly and Assembly of the CD Changer Unit (CRS1).
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SA-AK640E / SA-AK640EB / SA-AK640EG
10.7. Disassembly of Main P.C.B.
· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet · Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit · Follow the (Step 1) - (Step 3) of Item 10.5 - Disassembly of Rear Panel Step 1 Disconnect FFC cables (CN2803, CN2806 and CN2951). Step 2 Detach connectors (CN2808 & CN2809). Step 3 Remove Main P.C.B..
10.8. Disassembly of Transformer P.C.B.
· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet · Follow the (Step 1) - (Step 3) of Item 10.5 - Disassembly of Rear Panel · Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit Step 1 Disconnect connectors (CN5950 & CN5951). Step 2 Remove 3 screws (Mounting screws for transformer to bottom chassis).
Step 3 Push the Transformer P.C.B. sidewards to remove it.
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SA-AK640E / SA-AK640EB / SA-AK640EG
10.9. Disassembly of Power P.C.B.
· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet · Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit · Follow the (Step 1) - (Step 3) of Item 10.5 - Disassembly of Rear Panel · Follow the (Step 1) - (Step 3) of Item 10.7 - Disassembly of Main P.C.B. Step 1 Remove the 5 screws on Power P.C.B..
Step 5 Cut the joints with a metal cutter as shown below.
Step 2 Detach cable (CN5950) remove the 5 screws on Power P.C.B.. Step 3 Remove Power P.C.B.. Note: Insulate the Power P.C.B. with insulation material to avoid short circuit. · Replacement of the Power Amp IC or Voltage Regulator Step 4 Remove 2 screws at the Power Amp IC and/or 3 screws to Voltage Regulator. Step 6 Desolder the terminals to replace the components.
Step 7 Fix back the cut portion with a screw as shown.
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SA-AK640E / SA-AK640EB / SA-AK640EG
10.10. Disassembly of Front Panel Unit
· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet · Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit Step 1 Disconnect connectors (CN2803, CN2806, CN2951, CN5950 & CN5951). Step 3 Release 2 claws outwards.
Step 4 Remove the front panel unit. Step 2 Bent the front panel unit slightly forward as arrow shown. Note: Ensure 2 claws located at the bottom chassis is seated into the 2 slots at bottom of front panel at 2 catches (one on each side) of bottom chassis to be aligned to front panel's slot. Assembly is secured upon hearing clicking sound.
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SA-AK640E / SA-AK640EB / SA-AK640EG
10.11. Disassembly for Panel P.C.B.
· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet · Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit · Follow the (Step 1) - (Step 4) of Item 10.10 - Disassembly of Front Panel Unit Step 1 Remove the volume knob.
Step 2 Remove Lid. Note: Do not misplace the spring.
Step 2 Remove 12 screws.
Step 3 Release 2 catches. Step 4 Remove Panel P.C.B..
10.11.1. Disassembly of Lid
Step 1 Lift the spring sideward.
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SA-AK640E / SA-AK640EB / SA-AK640EG
10.12. Disassembly of Deck mechanism unit
· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet · Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit · Follow the (Step 1) - (Step 4) of Item 10.10 - Disassembly of Front Panel Unit Step 1 Detach FFC cable (CN971). Step 2 Disconnect FFC cable (CN1001). Step 3 Remove the 5 screws. Step 4 Push the lever upward, and then open the cassette lid ass'y (For DECK1 and DECK2).
Step 5 Tilt the cassette mechanism unit in the direction of arrow (1), and then remove it in the direction of arrow (2). Note: For disassembly of parts for deck mechanism unit, refer to Section 10.15.
10.13. Disassembly of Deck P.C.B.
· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet · Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit · Follow the (Step 1) - (Step 4) of Item 10.10 - Disassembly of Front Panel Unit Step 1 Remove 2 screws. Step 2 Desolder wire at deck motor terminals (W1002).
Step 3 Remove Deck P.C.B.
10.14. Disassembly of Traverse Unit
· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet · Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit Important notes: Ensure all the trays are in the "STOCK" position before proceeding to the disassemble of traverse unit. For procedures to set the trays in "STOCK" position, please refer to original Service Manual for CRS1, Section 7. Disassembling Procedure When Tray In Play Position, Order No. MD0509368C0.
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SA-AK640E / SA-AK640EB / SA-AK640EG
Step 3: Remove the traverse unit as arrow shown. · Assembly of Traverse Unit
Step 1: Press and hold the plunger lever and rotate the gear as arrows shown until it stop.
Step 1: Turn over the unit and install the traverse unit.
Step 2: Push the traverse slide plate as arrow shown to release the traverse unit. Caution: Do not exert strong force on the traverse slide plate.
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SA-AK640E / SA-AK640EB / SA-AK640EG
Step 2: Push the traverse slide plate as arrow shown to lock the traverse unit.
10.15. Disassembly of optical pickup unit (CD mechanism)
· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet · Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit · Follow the (Step 1) - (Step 2) of Item 10.14 - Disassembly of Traverse Unit Step 1 Pull out FFC.
Step 3 Remove 4 pins.
Step 2 Widening the catch, push the pin in.
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SA-AK640E / SA-AK640EB / SA-AK640EG
Step 8 Remove the catch of the drive rack, and take out the drive rack.
Step 4 Remove the traverse deck. Note: As floating springs (4 pieces) come off at the same time, be careful not to lose them.
Step 9 Place the convex part of an optical pickup to the concave part of a traverse base, then take out the optical pickup.
Step 5 Remove 3 screws. Step 6 Remove the CD Servo P.C.B. and turn it over. Note: Insert a short pin into FFC of the optical pickup. Step 7 Rotate the traverse deck (B) to the arrow direction and shift the optical pickup to the furthest backward.
34
SA-AK640E / SA-AK640EB / SA-AK640EG
35
SA-AK640E / SA-AK640EB / SA-AK640EG
10.16. Disassembly of Deck Mechanism
· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet · Follow the (Step 1) - (Step 4) of Item 10.6 - Disassembly of CD Changer Unit · Follow the (Step 1) - (Step 4) of Item 10.10 - Disassembly of Front Panel Unit · Follow the (Step 1) - (Step 5) of Item 10.12 - Disassembly of Deck Mechanism Unit
10.16.1. Disassembly of the pinch roller ass'y and head block
* The mechanism as shown below is for DECK1. For DECK 2, perform the same procedures. Step 1 Release the catch, and then remove the pinch roller (F). Step 2 Release 2 claws and detach the head block connector.
Step 3 Remove 2 screws. Step 4 Remove head block.
10.16.2. Disassembly of capstan motor ass'y, capstan belt A, capstan belt B and winding belt
Step 1 Detach the head block connector (Deck P.C.B.). Step 2 Desolder wire(W1002) at motor assembly. Step 3 Remove Deck P.C.B.
Step 4 Remove 3 screws (for deck 1 & 2). Step 5 Remove capstan belt A/B.
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SA-AK640E / SA-AK640EB / SA-AK640EG
Step 6 Remove the flywheel R. Step 7 Release the claw and remove the winding lever and spring. [Installation of the belt] Step 1 The boss and marking should be positioned horizontally. Step 2 Put the winding belt on the pulley temporarily. Step 3 Install the flywheel F. Step 4 Put the winding belt on the flywheel F. Step 5 Install the winding lever and spring while pressing the winding arm in the direction of arrow. Step 6 Install the flywheel R.
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SA-AK640E / SA-AK640EB / SA-AK640EG
tighten screws.
Step 7 Put the capstan belt A temporarily as shown below. Step 10 Install 3 screws. Step 11 Put the capstan belt B as shown below.
Step 8 Put the capstan belt B on the motor ass'y pulley. Step 9 Install the sub chassis to the mechanism, and then Step 12 Put the capstan belt A on the motor ass'y pulley.
10.17. Replacement for cassette lid
· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet Step 1 Lift up the lever upward, open the cassette deck. (For DECK1 and DECK2)
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SA-AK640E / SA-AK640EB / SA-AK640EG
Step 2 Push up the cassette lid (L/R) in the direction of arrow. (For DECK1 and DECK2).
10.18. Rectification for tape jam problem
· Follow the (Step 1) - (Step 2) of Item 10.4 - Disassembly of Top Cabinet Step 1 If a cassette tape cannot be removed from the deck (the tape is caught by the capstan or pinch roller during playback or recording), rotate the flywheel F in the direction of the arrow to remove it.
Step 2 Push the lever upward and open the cassette lid. Remove the cassette tape.
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SA-AK640E / SA-AK640EB / SA-AK640EG
11 Service Fixture and Tools
Service Tools Extension FFC (A) Deck P.C.B. - Main P.C.B. (B) Panel P.C.B. - Deck Mechanism P.C.B. REEX0485 (14 Pins) REEX0484 (10 Pins)
12 Service Positions
Note: For description of the disassembly procedures, see the Section 10.
12.1. Checking and Repairing of Main P.C.B.
40
SA-AK640E / SA-AK640EB / SA-AK640EG
12.2. Checking and Repairing of Transformer P.C.B.
41
SA-AK640E / SA-AK640EB / SA-AK640EG
12.3. Checking and Repairing of Panel, Deck & Deck Mechanism P.C.B.
42
SA-AK640E / SA-AK640EB / SA-AK640EG
12.4. Checking and Repairing of Power P.C.B.
43
SA-AK640E / SA-AK640EB / SA-AK640EG
13 Adjustment Procedures
13.1. Cassette Deck Section
· Measurement Condition - Reverse-mode selector switch: - Deck Tape Select: NORMAL - Make sure head, capstan and press roller are clean. - Judgeable room temperature 20 ± 5 °C (68 ± 9°F) · Measuring instrument - EVM (DC Electronic voltmeter) - Digital frequency counter · Test Tape - Tape speed QZZCWAT gain adjustment (3 kHz, -10 dB);
13.1.2. Bias Voltage Check
1. Set the unit "AUX" position. 2. Insert the Normal blank tape (QZZCRA) into DECK 2 and the unit to "REC" mode (use "l REC/STOP" key). 3. Measure and make sure that the output is within the standard value.
Bias voltage for Deck 2 14±4mV (Normal)
13.1.1. Tape Speed Adjustment (Deck 1/2)
1. Insert the test tape (QZZCWAT) to DECK 2 and playback (FWD side) the middle portion of it. 2. Adjust Motor VR (DECK 2) for the output value shown below.
Adjustment target: 2910 ~ 3090 Hz (NORMAL speed)
Fig. 2
3. After alignment, assure that the output frequency of the DECK 1 FWD are within ±60 Hz of the value of the output frequency of DECK 2 FWD.
Fig. 3
Fig. 1
13.1.3. Bias Frequency Adjustment (Deck 1/2)
1. Set the unit to "AUX" position. 2. Insert the Normal blank tape (QZZCRA) into DECK 2 and set the unit to "REC" mode (l use "REC/STOP" key). 3. Adjust L1002 so that the output frequency is within the standard value as below.
Standard Value: 89 ~ 110 kHz
Fig. 4
13.1.3.1. Cassette Deck Section
Below is the locations of test points for Deck P.C.B.:-
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SA-AK640E / SA-AK640EB / SA-AK640EG
13.2. Tuner Section
This section include details on the alignment of AM-IF and AM RF adjustment.
13.2.1. AM-IF Alignment
1. Set up the equipments as shown in Fig. 5. 2. Select [TUNER] mode on selector and set to [AM] mode. 3. Apply signal as shown in Fig. 5 from AM-SG. 4. Adjust Z2602 accordingly so that the output frequency is maximized at 450kHz in Fig. 6.
Fig. 5
Fig. 6
13.2.2. AM RF Adjustment
1. Set up the equipments as shown in Fig. 7. 2. Select [TUNER] on selector and set to [AM] mode. 3. Set AM-SG to 520kHz. 4. Receive 520kHz in the unit. 5. Adjust L2601 (OSC) so that the EVM-AC is maximized. 6. Set AM-SG to 600Hz. 7. Receive 600Hz in the unit. 8. Adjust L2601 (ANT) so that the EVM-SG is maximized. 9. Set AM-SG to 520kHz. 10. Receive 520kHz in the unit. 11. Adjust L2602 (OSC) so that the EVM-DC value is with 1.1±0.5V.
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SA-AK640E / SA-AK640EB / SA-AK640EG
Fig. 7
13.2.3. Adjustment Point
Below is the locations of alignment points on the Main (Tuner) P.C.B.
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SA-AK640E / SA-AK640EB / SA-AK640EG
14 Voltage and Waveform Chart
Note: Circuit voltage and waveform described herein shall be regarded as reference information when probing defect point, because it may differ from an actual measuring value due to difference of Measuring instrument and its measuring condition and product itself.
14.1. CD Servo P.C.B. & Main P.C.B.
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SA-AK640E / SA-AK640EB / SA-AK640EG
48
SA-AK640E / SA-AK640EB / SA-AK640EG
14.2. Power P.C.B. & Transformer P.C.B.
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SA-AK640E / SA-AK640EB / SA-AK640EG
14.3. Waveform Chart
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SA-AK640E / SA-AK640EB / SA-AK640EG
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SA-AK640E / SA-AK640EB / SA-AK640EG
15 Wiring Connection Diagram
FM ANT
PbF
AM ANT
H5104/ W5104 CN5103
9 ........
JK2601 To Fan CN2810
12
1 .........
1
H TUNER PACK P.C.B
12
12 ........ 1
B MAIN P.C.B
SOLDER SIDE
TUNER PACK
E POWER P.C.B
CN2801
21 1 .........
SOLDER SIDE
CN5102
........ ......
CN2809
BLACK RED
2 1
16 17
12
FAN MOTOR
CN2808
12 ........ 1
CN2805
15 14 ....... .......... 2
JK5102
JK5101
PbF
CN2803
14 . . . . . . .2 13 . . . . . . .1
CN2806 CN2951
10 . . . 2 9...1 30 . . . . . . . . . . . . 2 29 . . . . . . . . . . . . .1
1
SUB WOOFER
LEFT SPEAKER
RIGHT SPEAKER
9. . . . . .1 H6555/ W6555
To CRS1 (CN1)
MOTOR
PbF
2 - 1+
CN1001
2 1 .......... ..........
1
W1002
M
TRAVERSE MOTOR M7301
1615
CN7001
14 13
CS1002
1 3 5 2 4
F DECK P.C.B
SOLDER SIDE
M
CS1001
135 24
SPINDLE MOTOR M7302
... . ... .... ... ... ... ..
PHONE SENSOR VOLUME
JK6551
Z6481
CAUTION RISK OF ELECTRIC SHOCK AC VOLTAGE LINE. PLEASE DO NOT TOUCH THIS P.C.B
C PANEL P.C.B
SOLDER SIDE
PbF
T5951 SUB-TRANSFORMER
VR6491 CN5951
1 ....... 9 9 . . . . . . . . .1
JK5950
T5950 POWER TRANSFORMER
AC IN 230V~240V 50HZ...EB 230V 50HZ ....E/EG
CN6601
2 1 .................... ....................
CN5950
D TRANSFORMER P.C.B
SOLDER SIDE
29 30
JK6751
PbF
MUSIC PORT
A CD SERVO P.C.B
SOLDER SIDE
PbF
1...9 2 . . . 10
CN971
CN7002
17 16 ......... ............
G DECK MECHANISM P.C.B
SOLDER SIDE
2
21
OPTICAL PICKUP
PbF
(DECK 2) R/P HEAD
(DECK 1) PLAYBACK HEAD
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SA-AK640E / SA-AK640EB / SA-AK640EG
16 Block Diagram
OPTICAL PICKUP SEMICONDUCTOR LASER
Q7601 LASER POWER DRIVE B TOMAINBLOCK LPD LD
MCLK MDATA
A
B
B
B
X7201
81
X1
PHOTO DETECTOR
A A C
/RST
80
X2 (SMCK) (PMCK)
70
STAT
69
MLD
67 68
MCLK MDATA
51 53 52 54
ARFIN IREF DSLF PLLF
55
PLLFO
B B B B
A, B, C, D, E, F
LD LPD ARFF ARFF
79 NTEST2 82 NTEST 61 NSRVMONON 72 NRST 47 AVDD2 31 AVSS2 35~40 A,B,C,D,E,F 42 41 50 49 48 LD PD ARFFB ARFOUT ARFDC
B B
TIMING GENERATOR [GEN]
MICRO COMPUTER INTERFACE [MCIF] SPINDLE CPU [DSV]
DSL/PLL/VCO [DSLPLL] EFM DEMODUALTION SYNC INTERPOLATION CIRC ECC CDROM ECC [DEMECC] CIRC RAM
TXTCK TXTD DQSY
B B F F B E E B D
SUBCODE INTERFACE [DEMECC]
(SBCK) (SUBC) (TXNCLDCK) FLAG BLKCK 65 71 20 18
CMOS RF AMPLIFIER
SERVO CPU [DSV] BUS CONTROL UNIT [BCU]
45 RFOUT 46 RFIN 43 CENV
B B B IC7002 BA5948FPE2
33 CTRCRS 32 OSCIN 34 VREF 44 RFENV
1Mbit DRAM
PRAMVDD33 PRAMVSS33
BLKCK
STAT
ARFF
MLD
B
D0~D15 A0~A11 BA0,BA1
83~92,94~99 1~7,11~15 16,17 8,9 10,100 62 63 64
4 CH DRIVE
VREF 26
A/D CONVERTER
MP3/WMA DECORDER FS CONVERTER [FSC] SERIAL OUTPUT INTERFACE [DAO]
NWE,NCAS NRAS,SDRCK EXT0 EXT1 EXT2 (LRCK) (BCLK) (SRDATA)
B
FOP
PC SPOUT TRVP TRP FOP
22 PC 21 SPOUT 23 TRVP 24 TRP 25 FOP 29 SRVMON0 30 SRVMON1
F-
16 D3[CH3] 15 D3+ LEVEL SHIFT
FOCUS COIL
IN3
28
F+
OUTPUT PORT
DIGITAL FILTER 1bitDAC PWM LOGIC [DF, MASH] REGULATOR ANALOG LOWPASS FILTER
T-
18 D4[CH4] 17 D4+ LEVEL SHIFT
(DVDD2)
76
TRACKING COIL
IN4
27
TRP DIGITAL OUT
B
T+
IOVDD2
OUTR
SPINDLE MOTOR
M7302
M TRVM SPSP+
13 D2-
[CH2]
LEVEL SHIFT
TX
IC7001 MN6627954MA
12 D1+ 11 D1[CH1] LEVEL SHIFT MUTE [CH1] MUTE [CH2] IN1 3 SPOUT
66
57 58
59 56
OUTL
TRV+
14 D2+
IN2
1
TRVP
60 78
26
76
28
93 27 77
TRAVERSE MOTOR
M7301
SERVO PROCESSOR/ DIGITAL SIGNAL PROCESSOR/ DIGITAL FILTER D/A CONVERTER
B
CD SIGNAL RCH
B
B
B
PC1 4 PC2 2
PC
53
IOVDD1
DRVDD
DVDD2
DVDD1
AVDD1
DVSS3
DVSS2
DVSS1
AVSS1
B
SA-AK640E / SA-AK640EB / SA-AK640EG
FMANT 1 5 6 (FM) RF AMP
AMANT Z2620 MIXER OSC BUFFER 8 7 CF2601 Q2601 FM IF AMP CF2602 (DECK 1) P.B. HEAD L2601 D2602 L2602 LCH 24(23) 1(2) 22(3) 21(4)
GR12 GR1 SG16 SG1
P.B EQ ALC/T
IC1001 AN7348
B
B
FL6602 FL DISPLAY
FROM POWER TRANSFORMER
(DECK 2) R/P HEAD
LCH
17(8) 6 19 15 12
31~42
Q2610 SWITCH
14~22, 23~29
5~16,24
FL10 FL24 FL25
25~40
24
23
22
21
20
19
18
17
16
15
14
13
9 ALC BUFFER LEVEL DET FM IF AM OSC S-CURVE FM DET AM/FM IF BUFFER AM MIX AM RMAMP AGC AM IF COMP TUNING DRIVE REG
SD ST
7
CLK
STB
DIN
FL DRIVER
IC6601 C0HBB0000039
8 4 2
FL40
RCH
(DECK 2) ERASE HEAD
L1002
DECODER PILOT PHASE CANCEL DET STEREO SWITCH
AM DET
3 5
VCO FF REG 8 9 10 11 12 FF FF PILOT DET
DET_OUT
IC1004 C1AA00000612
Q1003 SWITCHING (BEAT PROOF/ RECH)
R/P SELECT
2 MPX
C1BB00000962 FM/AM IF AMP, DET/AM OSC, MIX/FM MPX
IC2601
B
Z2602 AM IFT X2602 /RST PLLCE STAT ST/DO
9 XIN
1
2
3
4
5
6
7
8 XOUT
IC2809 RDS_DA C1BB00000987 RDS CIRCUIT RDS_CLK
4 5 Q1017 MOTOR SWITCH M1002 Q2980 DECK MOTOR SWITCH
X2803
M
B
ST/DO SD
CD STATUS INTERFACE
Q2907
MODE
UNLOCK DETECTOR
S951
11
12 BITS PROGRAMMABLE DIVIDER
13
TO CD LOADING CIRCUIT
RDS_CLK FL_DOUT CHG_CCW CLOSE_SW BOTTOM_SW OPEN_SW UP_SENSOR HOME_SW PLAY_SW CHG_CW
PHOT0_1
UNIVERSAL COUNTER B 15 POWER ON RESET 19 Q2606 TUNER 15V SUPPLY SWITCH (FM) 10
SHIFT REGISTER LATCH
C2B I/F
DO 5 CE 2 DI 3 CL 4
ST/DO CE PLLDA PLLCLK
B
MLD MDATA
DET_OUT
22
SD
19
BLKCK
5 21
PLLCK ST/DO
78
STATUS
4 74
PLLCE CD_RST
5
4
RDS_DA
70 71 72
FL_CS FL_CLK
80
81
SPEED
82
83
84
85
86
ST_SW
87
89
90
S952
18
SWALLOW COUNTER 1/6,1/17,4 BITS
1 2
14 12
Z971 INTERFACE 97 91
DECK2
53
MODE_1
52
HALF_1
76 MLD 77 MDATA 78 MCLK
7
6
9
8
MCLK CE
C2CBYY000066 IC2801 MICROPROCESSOR
/RESTSW V_JOG_A V_JOG_B VOL_LED XC_OUT SW_LED
3 PLLCE
B
B
PLL FREQUENCY SYNTHESIZER
A TO CDDRIVE BLOCK
IC2602 C1CB00001937
XC_IN
X_OUT
82 S7201 RESET SWITCH
67 68
X_IN
10 X2801
11
13
15 X2802
66
65
B
D6462
QR6457
LED DRIVE
B
D6459
QR6459
LED DRIVE
VR6491 JOG VOL
54
S971
S975
17
S972
SD
HALF
20
BLKCK
BLKCK INTERFACE SWITCH
X2603
Q2906
PHOTO INTERRUPTER
MODE
HALF
16
PHASE DETECTOR CHARGE PUMP
REFERENCE DIVIDER
1
IC951 CNB13030R2AU
RECINH_F
PLLCLK
SA-AK640E / SA-AK640EB / SA-AK640EG
AUDIO SOUND PROCESSOR
IC1001 AN7348S-E1
3(4) IN-L2(R2) L-OUT(R-OUT) 42(37) Q2411(Q2311) MUTING CONTROL Q2142(Q2242) AGC CONTROL SWITCH 2(6) 3(5)
IC2803 C1BB00001121
IC OP-AMP
IC2804 C0AABB000125
1(7)
P.B EQ/REC AMP/ ALC/TPS AMP
(DECK 1) P.B. HEAD LCH 24(23) 1(2) 22(3) 21(4) (DECK 2) R/P HEAD LCH 17(8) 6 19 15 12 LOGIC L/H ALC NOR/CrO & HI/LO LOGIC LOGIC REC/PB 9 RIPPLE REJECTION 11 Q2978 CONTROL SWITCH 18(7) 10 16 14 13 7(8) RCH IN_L4(R4)
DATA
FILTER
Q2317 (Q2417) MUTING CONTROL
20(5)
1(2) IN-L1(R1) 53(17) REC-L(R) 54(16) GV-OUT-L(R)
IC2810 C0ABBB000244
5 6 3 2 7 1
DUAL OP-AMP
Q2555 MUTING SWITCH HP_L(R) PCONT/EFP_/CE
CD SIGNAL
5(6)
IN-L3(R3)
CLK
MUTE_D_AMP Q2553, Q2554 LEVEL CONTROL SWITCH PA_SW
40 JK6751
39
(DECK 2) ERASE HEAD 4 2 3 5 Q1003 SWITCHING (BEAT PROOF/ RECH)
L1002
B
BIAS OSC CONTROL Q1004, Q1005, Q1007
STANDBY
MUSIC PORT INPUT
DC_DET
R/P SELECT
IC1004 C1AA00000612
Q2501 METER CONTROL SWITCH
B
Q2511 MUTING CONTROL
Q2551, Q2552 SUPPLY CONTROL
FAN HP_SW
Q1017 MOTOR SWITCH M1002
M
Q2980 DECK MOTOR SWITCH
B
Q2942,Q2943 FAN MOTOR DRIVE
SYNC
FILTER
FAN
B
D2811
B
M
Q2948,Q2949 DC DETECT SWITCH
F_HOP
D2503
RECINH_F
IC951 CNB13030R2AU
MODE HALF
MODE
PHOTO INTERRUPTER
IC971 CNB13030R2AU
HALF
E-EPROM
Q2959,Q2960 PLUNGER SUPPLY SWITCH/ PLUNGER:ON/OFF SWITCH Q2957,Q2958 PLUNGER SUPPLY SWITCH/ PLUNGER:ON/OFF SWITCH 6 D971 5 4
IC2871
Q5201 HOPPING SWITCH
X52
(NOT SUPPLIED)
3
PHOTO INTERRUPTER
B
D2813 S6101~S6108, S6201~S6207, S6302~S6307
DC_DET Q5202 HOPPING SWITCH
S972
S971
S975
D951
S952
Z971 INTERFACE 97
PHOT0_1
HP_SW PA_SW
S951
53
MODE_1
52
HALF_1
91
DECK2
95
PHOTO_2
58
MTR
59
REC
60
DECK1_H
56
PLG1
57
PLG2
43
EE_DAT
42
EE_CLK
41
EE_CS
1
LM_1
26
ASP_DAT
27
ASP_CLK
40
MUTE_A
24(25)
SW_LV-1(2)
47
DCDET
92 ~ 94
KEY3 KEY1
PCONT/EFP_/CE 20 39 7 46 6 STANDBY SYNC MUTE_D_AMP F_HOP
SYNC MUTE_DA F_HOP PCONT/EFP_/CE STANDBY
C2CBYY000066 IC2801
SW_LED
MICROPROCESSOR
C2CBYY000066 IC2801 MICROPROCESSOR
65
18
B
D6459
QR6459
LED DRIVE
Z6481 REMOTE SENSOR
RMT
55
SA-AK640E / SA-AK640EB / SA-AK640EG
MP
0125
1(7)
IC5301 C1BA00000407 FILTER
Q2317 (Q2417) MUTING CONTROL 2 IN1+ 3 IN122 IN2+ 21 IN2Q2555 MUTING SWITCH HP_L(R) PCONT/EFP_/CE Q2341 (Q2441) HEADPHONE MUTING Q5154 PCONT SWITCH Q5153 MODE SWITCH Q5173 SWITCH Q5103,Q5104 FAN SWITCH
2-CH DIGITAL AMP
IC5401 C1BA00000407
2 IN1+ 3 IN122 IN2+ 21 IN2-
2-CH DIGITAL AMP
IC5501 C1BA00000407
2 IN1+ 3 IN122 IN2+ 21 IN2-
2-CH DIGITAL AMP
0244
7 1
-AMP
BOOT2(OUT2)
BOOT2(OUT2)
BOOT1(OUT1)
BOOT1(OUT1)
23 MODE 1 OSC
VDDP1(2) VSSP1(2)
8(16) 11(13)
23 MODE 1 OSC
VDDP1(2) VSSP1(2)
8(16) 11(13)
BOOT1(OUT1)
BOOT2(OUT2)
23 MODE 1 OSC
VDDP1(2) VSSP1(2)
8(16) 11(13)
15(16)
15(16)
PA_SW
STANDBY
L5301
L5401
L5501 SUBWOOFER
DC_DET
15(16)
9(10)
9(10)
9(10)
MUTE_D_AMP
B
D5126
LCH LEFT CH (6 W) JK5101 (JK5102)
FAN HP_SW Q5952 SYNCHRONISING SWITCH
LCH
SYNC Q2942,Q2943 FAN MOTOR DRIVE
B
Q2950~Q2952 DECK CONTROL SWITCH/ SUPPLY CONTROL SWITCH/ PCONT CONTROL SWITCH Q5950 SYSTEM 6V VOLTAGE REGULATOR D5961~D5964
RIGHT CH (6 W)
FILTER
FAN
M
RCH Q2948,Q2949 DC DETECT SWITCH F_HOP 1 2 Q5201 HOPPING SWITCH X5202 5 X5201 DC_DET Q5202 HOPPING SWITCH 3(6) 10 FP5940 T5950 T5951
SUB TRANSFORMER
B
Q5111 15V VOLTAGE REGULATOR
Q5101,Q5110 CURRENT CONTROL SWITCH/ 26V VOLTAGE REGULATOR Q5102,Q5108,Q5109 CURRENT CONTROL SWITCH/ SWITCH/ VOLTAGE REGULATOR
D5950~D5953
HEADPHONE
JK6551
FP5920
POWER TRANSFORMER
IC5201 C0JBAB000011
B
Q5115 5.7V VOLTAGE REGULATOR D5961~D5964 D5986,D5987
RL5950 Z5950
LOGIC IC
F1
L5950 LINE FILTER
JK5950 AC INLET
B
D5954~D5957 Q5112~Q5114 CURRENT STABLISER/ LIMITER SWITCH/ 11V VOLTAGE REGULATOR Q5951 VOLTAGE REGULATOR (-VP)
8, 7, 7
FP5950 D5959
HP_SW PA_SW PCONT/EFP_/CE 20 39 7 46 6 STANDBY SYNC MUTE_D_AMP F_HOP
B
B
TO FL DISPLAY
NC
DA
OP
/CE
Q5953 PCONT CONTROL
DBY
SIGNAL LINES : MAIN SIGNAL LINE : FM OSC SIGNAL LINE : FM SIGNAL LINE ( ) Indicates the Pin No. of Right Channel. : CD SIGNAL LINE : AM OSC SIGNAL LINE : AUX SIGNAL LINE : AM SIGNAL LINE : FM/AM SIGNAL LINE : CD-DA (AUDIO/VIDEO) SIGNAL LINE NOTE : Signal Lines are applicable to the Left Channel only. : PLAYBACK SIGNAL LINE : RECORD SIGNAL LINE
56
SA-AK640E / SA-AK640EB / SA-AK640EG
17 Schematic Diagram
(All schematic diagrams may be modified at any time with the development of the new technology)
17.1. Notes of Schematic Diagrams
Note: S951 S952 S971 S972 S975 S6101 S6102 S6103 S6104 S6105 S6106 S6107 S6108 S6201 S6202 S6203 S6204 S6205 S6206 S6207 S6301 S6302 S6303 S6304 S6305 S6306 S6307 S6308 S7201 VR6491 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : MODE Switch HALF Switch MODE Switch HALF Switch RECINH_F Switch POWER Switch SINGLE DISC CHANGE Switch OPEN/CLOSE Switch CD 1 Switch CD 2 Switch CD 3 Switch CD 4 Switch CD 5 Switch DECK 2 OPEN Switch DISPLAY/DEMO Switch DECK 1/2 Switch H.BASS Switch FF Switch REW Switch DECK 1 OPEN Switch CD Switch TAPE Switch STOP Switch REC Switch TUNER/BAND Switch MUSIC PORT Switch SUBWOOFER Switch MULTI DISC CHANGE Switch REST Switch VR VOLUME
· The voltage value and waveforms are the reference voltage of this unit measured by DC electronic voltmeter (high impedance) and oscilloscope on the basis of chassis. Accordingly, there may arise some error in voltage values and waveforms depending upon the internal impedance of the tester or the measuring unit. · Importance safety notice : Components identified by mark have special characteristics important for safety. Furthermore, special parts which have purposes of fire-retardant (resistors), highquality sound (capacitors), low-noise (resistors), etc. are used. When replacing any of components, be sure to use only manufacturer“s specified parts shown in the parts list. IC, LSI and VLSI are sensitive to static electricity. Secondary trouble can be prevented by taking care during repair. · Cover the parts boxes made of plastics with aluminium foil. · Put a conductive mat on the work table. · Ground the soldering iron. · Do not touch the pins of IC, LSI or VLSI with fingers directly.
57
SA-AK640E / SA-AK640EB / SA-AK640EG
58
SA-AK640E / SA-AK640EB / SA-AK640EG
17.2. (A) CD Servo Circuit
OPTICAL PICKUP CIRCUIT
LASER DIODE 6 8 11 12 C C 1 GND C 2 VCC 3 BIN 4 AIN NBOUT 8 GND 7 NAOUT 6 VREF 5 C
SCHEMATIC DIAGRAM - 1 CD SERVO CIRCUIT
CP701 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 CN7001 VCC F E LD LD GND GND A GND B VREF LPD GND TT+ FF+ W7025 W7023 0 0
: +B SIGNAL LINE
: CD-DA SIGNAL LINE
W7022 0 W7020
: CD SIGNAL LINE
0 R7217 1K W7019 0 W7018 0 C7225 1000P C7218 0.082
C7231 6.3V220P C7230 0.1
R7650 5.6
C7614 6.3V100P C7613 0.1 W7026 W7024 0 0
Q7601
Q7601
W7007 0
C7233
R7601 4.7 C7601 6.3V33
C7670 0.1
C7626 0.1
0.1
16
C7227 50V1
17 19
W7006 0
14 C7232 6.3V220P 18
B1ADCF000001 LASER POWER DRIVE
R7218 1K R7212 820
100
C7226 C7228 1000P 50V1
D7650 MAZ80560ML
W7008 0 W7009 0 W7010 0 8 C7263 0.1 13
C7241 1000P R7211 82K C7244 0.015 C7217 0.1 51(RF) C7216 680P
7 9 31
4 9 10 5 2 3
R7221
W7005 0
C
24
4
W7011 0
ARFIN DSLF IREF PLLF PLLF0 OUTL AVSS1 AVDD1 OUTR DVSS3 NSRVMONON EXT0 EXT1 EXT2 FLAG TX MCLK MDATA MLD STAT BLKCK NRST DQSYTXT SMCK PMCK
W7014 0 C7203 6.3V220P C7223 50V4.7 C7204 0.1 50 W7017 W7021 0 0 W7016 0 R7329 C7335 0.1 C7334 10V220 15
D3-
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75
C7253 470P
C7243 0.1 W7028 0
LCH OUT A.GND RCH OUT +3.3V D.GND LD SW +7.5V PGND MCLK MDATA MLD BLKCK STAT /RST REST SW LOADING
C7161 0.1 W7015 C7102 C7142 C7107
1K
R7328 R7349 18K
10K W7012
R7327 1K
R7111 0 W7013 C7154 C7155
FOP TRP TRVP PC SPOUT PRAMVDD33 PRAMVDD15 PRAMVSS33 BA1 BA0 A10 A0 A1 A2 A3 NRAS NCAS NWE A4 A5 A6 A7 A8 A9 A11
16
D3+
17
D4-
18
D4+
19
PVCC2
20
PGND2
21
NC
VREF
IN4
PGND1
PVCC1
IC7002 BA5948FPE2 4 CH DRIVE
8 GND
NC NC NC NC
VCC
IN3
NC
NC
NC
GND
22
23
24
25
26
27
28
50 49 48 47 0.47 46 45 3300P 44 0.022 43 42 41 40 39 38 37 36 35 34 33 10K 32 0 31 30 29 0.1 28 0.1 27 26 0
ARFFB ARFOUT ARFDC AVDD2 RFIN RFOUT RFENV CENV LD PD A C B D F E VREF CTRCRS OSCIN AVSS2 SRVMON1 SRVMON0 DVDD1 IOVDD2 DVSS1
DIGITAL SIGNAL PROCESSOR/ DIGITAL FILTER D/A CONVERTER
IC7001 MN6627954MA SERVO PROCESSOR/
DVDD2 76 IOVDD1 77 DVSS2 78 NTEST2 79 X2 80 X1 81 NTEST 82 D2 83 D1 84 D0 85 D3 86 D4 87 D5 88 D6 89 D7 90 D15 91 D14 92 DRVDD 93 D13 94 D12 95 D11 96 D10 97 D9 98 D8 99 SDRCK 100
R7253 R7254 C7166
10 1K 0.01
17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
TO MAIN CIRCUIT (CN2801) ON SCHEMATIC DIAGRAM-3
X7201
R7214 470
CN7002 3
R7220 1M X7201 H2B169500005 C7264 0.1 W7004 0 W7002 0 W7003 0 W7001 0
25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 C7352 0.018 C7339 0.018 C7234 0.1 C7235 16V10
C7165 10 C7164 10 PC1 PC2 IN1 IN2
D2+
D1+
D2-
14
13
12
D1-
11
10
9
7
6
5
4
3
2
1
R7336 10
W7027 0 R7335 100 C7338 0.056 R7323 3.3K R7325 330 C7315 0.47
R7339 1K
R7330 5.6K
2
10
39
M M
38 M7301 TRV MOTOR 36 M7302 SRL MOTOR
R7332 1K R7315 3.3K 1
37
S7201 RESET SW 11
R7331 22K
SA-AK640E/EB/EG CD SERVO CIRCUIT
59
SA-AK640E / SA-AK640EB / SA-AK640EG
60
SA-AK640E / SA-AK640EB / SA-AK640EG
17.3. (B) Main (Tuner) Circuit
SCHEMATIC DIAGRAM - 2 MAIN (TUNER) CIRCUIT
HVM27 33K 33K HVM27
: +B SIGNAL LINE : FM/AM SIGNAL LINE
: FM SIGNAL LINE : FM OSC SIGNAL LINE
R2604 1K
: AM SIGNAL LINE : AM OSC SIGNAL LINE
FM EXT ANT 75 OHM GND
0.47uH 100K 18P HVM27
7P
4P
1P
1uH 1.5M 10K
1 2
100K
22P
Z2620 ENV17290G1Y 22P 15P 1 1P 2 3 4 5
Q2606
2SK238 8P
8P
4P 2SC2620
22
IFT
220P
220 2SC2996 470K 0.022
330
150
3 AM LOOP ANT 4 AM EXT ANT JK2601
0.022
0.022 100
10K
33K
100uF 16V
0.022
C2603 CF2601 0.01 J0B1075AA006 7 1 3 C2604 1000P 2 R2605 470
R2607 330 R2606 470K
CF2602 R2601 J0B1075AA006 0 3 1 2
B1GCCFJJ0016 TUNER 15V
SUPPLY SWITCH Q2601
Q2606
Q2601
C2602 16V100 R2621 22K R2643 22K R2603 100 C2620 16V10 C2638 0.01 R2639 22K R2640 22K
6
B1AABC000003 FM IF AMP Q2610 2SC3311ARA SWITCH
Q2610
2.7K
330
8P
HVM27
2SK360 8P
C2601 0.01
15P
2SC2996
47P
100K
1.2K 18P
33P
10K
3P
C2910 680P R2620 47K
C2618 0.01
R2602 4.7K C2637 3300P
L2601 G2A411C00001 R2610 C2607 1K 0.047
L2602 G2BPC0000016 R2612 100K C2608 8P
R2619 3.3K
24
OSC OUT
23
OSC
22
AFC
21
AM RF IN
20
AGC
C2615 50V4.7
DET/AM OSC MIX/ FM MPX
19
AM OUT
18
DET OUT
17
PILOT IN
16
MPX IN
15
PILOT OUT
R2623 68K
C1BB00000962 FM/AM IF AMP
IC2601
C2616 0.033 C2631 100P
14
RCH
C2617 0.01
D2602 B0CDBB000015
C2639 50V4.7
2P
8
C2636 1000P
C2614 50V3.3
C2609 1000P
R2646 100K R2642 C2644 6.8K 4700P
13
LCH
C2642 50V1 R2641 6.8K C2641 50V1 R2645 100K C2643 4700P
R2618 3.3K
FM IF IN
AM MIX OUT
AM IF IN
FM DET
FM/AM
IC2601
SD
1
2
3
4
5
6
7
8
9
10
11
3 2 1 Z2602 G2BAD0000003 R2611 390
R2613 10K
4
R2627 470 R2622 C2622 2.7K 50V1
C2648 0.01 R2626 1K
X2602 H3F1065A0002 R2625 470
C2627 16V22
C2626 1
C2606 1000P
C2647 1000P
R2624 33
MONO
GND
REG
VCC
ST
STRQ
12
C2621 50V0.47 C2623 50V1
5
6
R2644 120 R2631 120
D2601 B0BC5R000009 R2614 5.6K C2633 12P
C2630 C2632 6.3V100 1000P
C2625 16V22 C2611 50V4.7
R2651 82 C2613 1000P
R2617 68K
R2628 82 R2629 27K
C2629 6.3V100
C2649 0.1
C2612 0.01 20
XOUT
R2615 560
C2624 100P
R2616 1K 19
VSS
18
AOUT
17
AIN
16
PD
15
VDD
14
FMIN
13
AMIN
12
MONO
11
IFIN
X2603 H0H720400007
XIN
DO
AM
SDC
STRQ
R2652 0
R2633 1K
W2919
C2610 0.01
IC2602 C1CB00001937 PLL FREQUENCY SYNTHESIZER
LW CL
R2632 10K
FM
1 C2634 12P R2638 3.3K
2
1K
3
1K
4
1K
5
470
6
7
8
9
10
TGND 15V DET_OUT DO/ST SD +7.5V 1A RCH CE LCH PLLDA DO/ST PLLCLK 1B
TO MAIN CIRCUIT (2A) ON SCHEMATIC DIAGRAM-3
CE
DI
0
CE
SA-AK640E/EB/EG MAIN (TUNER) CIRCUIT
SD
DO/ST
R2630 10K
TO MAIN CIRCUIT (2B) ON SCHEMATIC DIAGRAM-3
R2637
PLLDA R2636
PLLCLK R2635
DO/ST R2634
61
SA-AK640E / SA-AK640EB / SA-AK640EG
62
SA-AK640E / SA-AK640EB / SA-AK640EG
17.4. (B) Main Circuit
SCHEMATIC DIAGRAM - 3 MAIN CIRCUIT
1/4
: +B SIGNAL : -B SIGNAL
: FM/AM SIGNAL LINE : MAIN SIGNAL LINE
: TAPE RECORD SIGNAL LINE : TAPE PLAYBACK SIGNAL LINE
: CD SIGNAL LINE
SA-AK640E/EB/EG MAIN CIRCUIT
4.7K 8.2K C2182 1 C2181 1 R2173
W2511 0 R2701 1K
C2101 1
C2 C2
1K 0.22 3300P 0.01 0.01 0.1 0.056 1 0
0 680
R2172
C2703 470P
R2183 C2183 C2175 C2173 C2174 C2171 C2172 C2301 C2302
R2182 R2181
AGC CONTROL SWITCH
R2703 220K
Q2142 B1ABCF000176
R2702 1K
56 55 54 53 52 51 50 49 48 47 46 45 44 43
OP-IN OP-OUT SV_OUT-L REC-L PRE-VIN-L SUR1 SUR2 TRE-L MID-L1 MID-L2 BASS-L1 BASS-L2 T-OUT-L POST-VM-L
B1ABGC000005 MUTING SWITCH
42 41 40 39 38 37 36 35 34 33 32 31 30 29 C2311 1 R2311 470 R2312 10K R2355 270K R2455 270K C2411 1 R2412 10K R2411 470
Q2311,Q2411
R2145 1K R2314 0 C2312 1
R2146 1K
R23 56
C2112 C2212 C2122 C2222 C2132 C2232 C2152 C2252
1 1 1 1 1 1 1 1
REF-OUT GV-OUT-R REC_L PRE-VIN-R HB-MIX-IN HB-MIX-OUT HB-FLT-OUT HARMIN HARMOUT HB-ATT-IN HB-ATT-OUT HB-LPF-IN HB-LPF-OUT NC
C2114 0
C2214 0
C2582 16V100
15 16 17 18 19 20 21 22 23 24 25 26 27 28
C2191 50V4.7 B0ACCK000005 C2192 0.1
C2124
C2224
C2134
C2234
C2154
C2254
R2706 3.3K
0 680
R2195 10K 10K C2195 0.47
R2415 56K
W2506 0
0 0 0 0 0 0
R2245 1K
C2706 50V1
C2414 10P
1 2 3 4 5 6 7 8 9 10 C2161 0.01 11 C2261 0.01 12 13 C2581 16V100 14
IN-L1 IN-R1 IN-L2 IN-R2 IN-L3 IN-R3 IN-L4 IN-R4 IN-L5 IN-R5 IN-L6 IN-R6 GND REF-IN
IC2803 C1BB00001121 AUDIO SOUND PROCESSOR
L-OUT NC DATA CLK VCC R-OUT POST-VM-R T-OUT-R BASS-R2 BASS-R1 MID-R2 MID-R1 TRE-R NC
C2401 C2402 C2272 C2271 C2274 C2273
1 0.082 0.15 0.01 0.01
0
C2342 1 C2442 1 R2413 100K R2414 0
R2704
R2313 100K
C2704 470P
W2514 0
Q2311
220K
4
3
IC2804 C0AABB0001 OP AMP
5
C2413 47P
Q2411
C2412 1
6
R2212 3.3K
R2112 3.3K
R2282 R2281
W2503 0
Q2242 B1ABCF000176 AGC CONTROL SWITCH
R2246 1K
D2241 B0ACCK000005
1
1
C2282
C2281
D2191
R2196
W2501 0 14 13 12 11 10 9 8 7 6 5 4 3 2 1 PB_L PB_R GND REC_IN_L REC_IN_R +B REC_H MO+B MO_GND NC DECK1_H NC MOTOR NC
W2520 0 R2102 3.3K R2104 R2204 27K 27K R2103 2.2K C2201 1 R2203 2.2K W2577 0
C2193 1
R2111 2.2K
R2211 2.2K
R2193 4.7K R2283 100K C2283 0.047
R2194 100K
C2194 0.1
C2275 3300P
R2273 4.7K
R2271 6.8K
D2583 B0BC9R000008
C2583 16V100
C2588 0.1
B1GDCFJJ0047 MUTING CONTROL B1ABGC000005 HEADPHONE MUTING
R2347 1 R2346 3.3K
W2530 0
Q2341,Q2441
Q2511
R2247 100K
C2245 16V10
R2248 6.8K
TO DECK CIRCUIT (CN1001) ON SCHEMATIC DIAGRAM-7
R2202 3.3K
C2509 16V33
R2509 560
R2510 C2585 220P 220
R2585 330K
C2584 220P
W2513 0
W2531 0
R2342 0 R2344 0
+15V C2976 16V10 MOT_12V P_GND REC[59] R2122 3.3K C2121 3300P
C2501 1
R2501 330K
R2503 2.7K
C2503 1
D2503 B0ADCC000002
Q2511
R2507 100K C2507 0.22 R2508 1K
Q2341
R2357 100K
C2344 0.47
CN2803
Q2501 B1ABCF000176 LEVEL METER
R2502 82K A_GND R2504 100 CONTROL SWITCH R2505 0
R2345 1.5K
SW5V
1.2K
C2444 0.47
Q2978 B1GDCFJJ0047 REC:ON/OFF CONTROL SWITCH Q2980
W2553 0
R2511 2.2K
R2512 100K
R2222 3.3K
C2221 3300P
MTR[58] DECK_H
R2587
SUPPLY CONTROL SWITCH (DECK MOTOR)
B1GDCFJJ0047
Q2980
R2584 330K W2546 0 W2526 0
R2586 1.2K
C2511 50V2.2
N
R2457 100K R2446 3.3K
R2445 1.5K R2442 0 R2444 0 R R
Q2441
47K
10K
ASP_CLK ASP_DA +15V
MUTE_A
R2674 47K
10K
R2121 3.3K
R2221 3.3K
R2447 1
A_GND
SW15V
R2673
R2672
R2671
TUNER RCH
R2675
63
HP_R
LM_1
HP_L
-9V
C2313 47P C2314
2
7
R2 3. R2 3.
R R
SA-AK640E / SA-AK640EB / SA-AK640EG
W2511 0 R2701 1K C2701 0.01 C2702 C2705 16V100 50V1
SA-AK640E/EB/EG MAIN CIRCUIT
2/4
C2703 470P
R2703 220K
Q2142 B1ABCF000176 AGC CONTROL SWITCH B1ABGC000005 MUTING SWITCH
C2311 1 R2311 470 R2312 10K R2355 270K R2455 270K C2411 1 R2412 10K R2411 470 R2245 1K Q23