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ORDER NO. MD0703023CE
CD Stereo System
SA-AK750GCP
Colour (K)... Black 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%, both channels driven 1 kHz (Low channel) 10 kHz (High channel) 60 Hz (Subwoofer channel) Total output power n FM/AM TUNER, TERMINALS SECTION Preset station Frequency Modulation (FM) Frequency range Sensitivity S/N 26 dB Antenna terminal(s) Amplitude Modulation (AM) Frequency range Sensitivity S/N 20 dB (at 999 kHz) Music Port input jack 560 µV/m 522 to 1629 kHz (9 kHz step) 520 to 1630 kHz (10 kHz step) n DISC SECTION Disc played [8 cm or 12 cm] (1) CD-Audio (CD-DA) 87.50 to 108.00 MHz (100 kHz steps) 4.0 µV (IHF) 2.2 µV 75 (unbalanced) FM 20 stations AM 15 stations 220 W per channel (6 ) 660 W 110 W per channel (3 ) 110 W per channel (3 ) Terminal Sensitivity Phone jack Terminal MIC jack Terminal Sensitivity n CASSETTE DECK SECTION Track system Heads Record/playback Erasure Motor Recording system Erase 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 Mono, 3.5 mm jack 0.7 mV, 680 Stereo, 3.5 mm jack Stereo, 3.5 mm jack 100 mV, 4.7 k
© 2007 Matsushita Electric Industrial Co. Ltd.. All rights reserved. Unauthorized copying and distribution is a violation of law.
SA-AK750GCP
(2) CD-R/RW (CD-DA, MP3* formatted disc) (3) MP3* * MPEG-1 Layer 3, MPEG-2 Layer 3 Bit rate MP3 Sampling frequency MP3 CD-DA Decoding Digital filter D/A converter Pick up Wavelength Beam Source Audio output (Disc) Number of channels n USB SECTION Playable USB Storage Media 1) HDD 2) USB MP3 Player/Digital audio player 3) USB Thumbdrives Supported audio file format MP3 bit rate USB memory port Maximum current Bit rate MP3 Sampling frequency 32 kbps to 320 kbps 500 mA 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
MP3 Audio output (MP3) Number of channels Frequency response (MP3) S/N Ratio USB unit out n GENERAL Power supply Power consumption Power consumption in standby mode Dimensions (W x H x D) Mass Operating temperature range Operating humidity range n SYSTEM SC-AK750 (GCP)
32 kHz, 44.1 kHz, 48 kHz 2 channel 20 Hz to 20 kHz (0+/-1.0 dB) 85 dB AC 110 to 127/220 to240 V, 50/60Hz 126 W 0.7 W 250 x 330 x 323 mm 7.1 kg +5 to +35°C 5 to 90% RH (no condensation) Music center: SA-AK750 (GCP) Speakers: SB-AK750 (PL) Subwoofer: SB-WAK750 (PL)
For information on speaker system, please refer to the original Service Manual (Order No. MD0703024CE) for SB-AK750PL-K and (Order No. MD0703025CE) for SB-WAK750PL-K. 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. Before Use 1.3. Before repair and adjustment 1.4. Protection Circuitry 1.5. Safety Part Information 2 Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices 3 Handling Precautions For Traverse Deck 4 Precaution of Laser Diode 5 Warning 5.1. Service caution based on legal restrictions 6 Accessories 7 Operating Procedures 7.1. Main Unit Key Buttons Operations 7.2. Remote Contraol Key Buttons Operations 8 New Features 5 7 9 10 10 11 12 12 12 14 4 4 4 4 4 5 Mass Storage Class Device 9 Self diagnosis and special mode setting 9.1. Service Mode Summary Table 9.2. Special Mode Table 1 9.3. Reliability Test Mode (CRS1 Mechanism) 9.4. Error code Table Display 10 Assembling and Disassembling 10.1. Caution 10.2. Disassembly flow chart 10.3. Main Parts Location 10.4. Disassembly of Top Cabinet 10.5. Disassembly of CD Changer Unit (CRS1) 10.6. Disassembly of Rear Panel 10.7. Disassembly of Main P.C.B. 10.8. Disassembly of Transformer P.C.B. 10.9. Disassembly of Power P.C.B.
Page
8.1. Using the Music Port & Connecting and Playing a USB 14 17 17 17 20 21 25 25 26 27 28 28 29 31 31 32
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10.10. Disassembly of Front Panel Unit 10.11. Disassembly for Panel P.C.B. 10.12. Disassembly of Tact Switch P.C.B. 10.13. Disassembly of USB P.C.B. 10.14. Disassembly of Deck mechanism unit 10.15. Disassembly of Deck P.C.B. 10.16. Disassembly of Traverse Unit 10.17. Disassembly for Deck Mechanism 10.18. Disassembly of Deck Mechanism P.C.B. 10.19. Disassembly of cassette lid 10.20. 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. Mechanism Unit 13.1. Operation Check with Cassette Tape 13.2. Operation Check without Cassette Tape 14 Measurement And Adjustments 14.1. Cassette Deck Section 15 Voltage and Waveform Chart 15.1. USB P.C.B. 15.2. CD Servo P.C.B. 15.3. Power P.C.B. & Transformer P.C.B. 15.4. Panel P.C.B. 15.5. Main P.C.B. 15.6. Deck P.C.B. 15.7. Waveform Chart 16 Wiring Connection Diagram 17 Block Diagram 17.1. CD Servo Diagram
33 34 35 35 36 36 37 38 41 42 42 44 44 44 45 45 46 47 47 47 49 49 51 51 51 52 52 53 54 54 55 57 57
17.2. Deck/ Deck Mechanism Diagram 17.3. Main Diagram 17.4. Panel Diagram 17.5. Power Diagram 17.6. USB/ Transformer Diagram 18 Notes Of Schematic Diagram 19 Schematic Diagram 19.1. (A) CD Servo Circuit 19.2. (B) Main Circuit 19.3. (C) Panel Circuit 19.4. (D) Sub Panel Circuit & (G) Deck Mechanism Circuit 19.5. (E) Power Circuit 19.6. (F) Deck Circuit 19.7. (H) Transformer Circuit 19.8. (I) USB Circuit 20 Printed Circuit Board 20.1. (A) CD Servo P.C.B., (F) Deck P.C.B. & (G) Deck Mechanism P.C.B. 20.2. (B) Main P.C.B. 20.3. (C) Panel P.C.B. 20.4. (D) Sub Panel P.C.B. & (I) USB P.C.B. (Side A & B) 20.5. (E) Power P.C.B. 20.6. (H) Transformer P.C.B. 21 Illustration of ICs, Transistors and Diodes 22 Terminal Function of IC's 22.1. IC7001 (MN6627954MA) Servo Processor,Digital Signal Processor/Digital filter and D/A Converter 22.2. IC7002 (BA5948FPE2) IC 4CH Drive 22.3. IC2801 (C2CBYY000423) System Microprocessor 23 Exploded Views 23.1. Cabinet Parts Location 23.2. Deck Mechanism Parts Location (RAA4403-S) 23.3. Packaging 24 Replacement Parts List
58 59 61 62 63 65 67 67 68 72 73 74 76 77 78 79 80 81 82 83 84 85 87 88 88 89 89 91 91 93 94 95
13 Procedure for Checking Operation of Individual Parts of Deck
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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 .
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.
Fig. 1
1.2.
Before Use
Be sure to disconnect the mains cord before adjusting the voltage selector. Use a minus(-) screwdriver to set the voltage selector (on the rear panel) to the voltage setting for the area in which the unit will be used. (If the power supply in your area is 110V or 120V, set to the "127V" position.) Note that this unit will be seriously damaged if this setting is not made correctly. (There is no voltage selector for some countries, the correct voltage is already set.)
1.3.
Before repair and adjustment
Disconnect AC power, discharge Power Capacitors C5101, C5104, C5171, C5172, C5920, C5940 and C5950 through a 10, 5W 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 110 ~ 127V, 60 Hz in NO SIGNAL mode (volume min at CD mode) should be ~ 500mA. Current consumption at AC AC 220 ~ 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: 4
SA-AK750GCP
· 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.
1.5.
Safety Part Information
Safety Parts List: There are special components used in this equipment which are important for safety. in the Schematic Diagrams & Replacement Parts List. It is essential that these critical parts should These parts are marked by be replaced with manufacturer's specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of manufacturer. Table 1
Reference No. S5950 L5601 L5602 L5603 L5604 T5950 T5951 Z5950 RL5950 F1 F2 FP5920 FP5940 FP5950 JK5950 A2 Part No. K0ABLB000003 G0B9R5K00001 G0B9R5K00001 G0B9R5K00001 G0B9R5K00001 G4CYAYY00143 G4C2AAJ00005 ERZV10V511CS K6B1AEA00015 K5D502BLA013 K5D252BLA013 K5G103A00019 K5G103A00019 K5G402A00025 K2AA2B000011 K2CQ2CA00006 Part name & Description SW VOLTAGE SELECTOR CHOKE COIL CHOKE COIL CHOKE COIL CHOKE COIL MAIN TRANSFORMER SUB TRANSFORMER ZENER POWER RELAY FUSE FUSE FUSE PROTECTOR FUSE PROTECTOR FUSE PROTECTOR JK AC INLET AC CORD Remarks
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. 5
SA-AK750GCP
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 : 785 nm(CD)/662 nm(DVD) 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. 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 Labels
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5 Warning
5.1.
5.1.1.
Service caution based on legal restrictions
General description about Lead Free Solder (PbF)
The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this equipment in considering the globally environmental conservation. The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin (Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86°F) more than that of the normal solder. Definition of PCB Lead Free Solder being used
The letter of "PbF" is printed either foil side or components side on the PCB using the lead free solder. (See right figure)
Service caution for repair work using Lead Free Solder (PbF) · The lead free solder has to be used when repairing the equipment for which the lead free solder is used. (Definition: The letter of "PbF" is printed on the PCB using the lead free solder.) · To put lead free solder, it should be well molten and mixed with the original lead free solder. · Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC. · Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt the lead free solder. · Use the soldering iron (more than 70W) equipped with the temperature control after setting the temperature at 350±30 degrees C (662±86°F). Recommended Lead Free Solder (Service Parts Route.) · The following 3 types of lead free solder are available through the service parts route. RFKZ03D01K-----------(0.3mm 100g Reel) RFKZ06D01K-----------(0.6mm 100g Reel) RFKZ10D01K-----------(1.0mm 100g Reel) Note * Ingredient: Tin (Sn), 96.5%, Silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3%
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6 Accessories
Remote Control
FM Antenna Wire
AC Cord
AM Loop Antenna
AC plug adaptor
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7 Operating Procedures
7.1. Main Unit Key Buttons Operations
7.2.
Remote Contraol Key Buttons Operations
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8 New Features
8.1. Using the Music Port & Connecting and Playing a USB Mass Storage Class Device
This feature enables you to enjoy music from a portable audio equipment.
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With reference to page 15 of the operating instruction manual.
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With reference to page 16 of the operating instruction manual.
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SA-AK750GCP
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.
Service Mode Summary Table
The service modes can be activated by pressing various button combination on the main unit and remote control unit. Below is the summary for the various modes for checking:
Player button [ ] Remote control button unit [4], [7] Application Enter Doctor Mode Note Refer to the section, "9.2 Special Mode Table 1 for more information.
Mode In Doctor Mode
Remote control button unit Main unit [ ], [4]+[7] [4] [Muting] [0] [DIMMER] [DISC] [7] [8] [9] [ ] [PRESET EQ] [H. Bass] [PROGRAM] [5] [6] [SLEEP] [<] [>] [ ] [ ]
Application
Note Refer to the section, "9.2.1 for more information. Refer to the section, "9.2 for more information. Clock Setting Refer to the section, "9.2 for more information. Tape Eject Test Refer to the section, "9.2 for more information. All segment display for the FL Refer to the section, "9.2 for more information. CRS1 Inspection Refer to the section, "9.2 for more information. Volume 50 Setting check Volume 41 Setting check Volume 35 Setting check Volume 0 Setting check EQ Off EQ Heavy HIC force MUTE ON/ OFF CD To Tape recording Inspection Tape record's playback TPS Inspection FM Tuning check Tuner STEREO/ forced MONO FM OK/ NG (98.1 MHz) AM OK/ NG (1000 KHz)
9.2.
Special Mode Table 1
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 [ To exit, press main unit or remote control. ]button for 3 ]. button on
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Mode Name Doctor Mode
Item Description To enter into Doctor (Display 1) Mode for checking of various items and displaying checksum and software version. FL Display sequence: Display 1 2
FL Display
Key Operation Front Key In any mode: 1. Press [ ] button on main unit follow by [4] and [7] on remote control. To exit, press [ENTER] button on remote button on main control or unit.
(Display 2)
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: CD Test Mode To enter into checking the reliability of changer unit. In any mode: 1. Select [ ] for CD mode. ] button for 3 ].
2. Press and hold [ seconds follow by [
CD Auto Adjustment
To check the CD auto adjustment result for FLOCK, TLOCK and CLVS. FLOCK: Focus Lock TLOCK: Traverse Lock CLVS: Constant Linear Velocity Speed
To exit, press button on 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 9.3)
In Self-Diagnostic Mode: 1. Select [ ] for CD mode. 2. Press [ ] button. button on To exit, press main unit. (The tray will return to PLAY position and then power off) In Tape mode: 1. With no cassette tape inserted, 2. Press [ on main unit. To exit, press [ main unit. ],[ ] button
SRVC_TRV
To unlock the traverse unit for service. FL Display sequence: Display 1 2
(Display 1)
3. Press [SINGLE CHANGE] on main unit. (Display 2) ] button on
Open/ Close Test To check the function operation of changer unit. (For more information, refer to 9.3)
In doctor mode: 1. Press [DISC] on remote control. To exit, press [ENTER] button on remote button on main control or unit.
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Item Mode Name Description 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 [0] button on remote control.
FL Display Test To check the segments display segments will light up LED will blink at second interval) Cold Start
FL (All and 0.5
In doctor mode: 1. Press [DIMMER] button on remote control.
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. In doctor mode: 1. Press [MUTING] button on remote control.
Clock Setting Check
To indicate that a clock time was set properly
9.2.1.
EEPROM Checksum (ROM Correction)
Purpose: To check for microprocessor firmware version and EEPROM checksum (ROM correction). Below are the procedures for this mode. Step 1: Enter into Doctor mode (for more information, refer to section 9.2 on the key operation to enter into this mode. Step 2: (By pressing STOP button on main unit followed by "4" and "7" on remote control) Check for firmware version and EEPROM checksum. · When entering into DOCTOR MODE, the firmware version and checksum data of EEPROM (if applicable) will appear on FL display. Below is the information on the EEPROM IC (ROM correction) under 3 possible situations: 1. In the case that the correction point existence data is other than 0 (ie. correction file exists), EEPROM checksum display for the microprocessor shall be made after calculating checksum by summing up the content of data area from EEPROM IC.
2. In the case when no EEPROM IC is installed. It is display as below (no display of checksum data)
3. In cases that the filename is different even though a EEPROM is installed, or no correction file exists, [NG] shall be displayed (the correction point existence data is set to 0 at this condition).
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Note: Microprocessor firmware refers to version number for microprocessor IC located on PANEL P.C.B.. It is subject to change which would be updated accordingly. ROM correction checksum refers to the HEX code that is displayed upon key buttons pressed if an EEPROM is loaded in the unit.
9.3.
Reliability Test Mode (CRS1 Mechanism)
Below is the process flow chart of ageing for the CD changer unit. (CRS1)
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9.4.
Error code Table Display
Self-Diagnosis Function (refer Section 9.2) 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.
9.4.1.
Error Code Table for Deck Mechanism
Description of error Normal operation during mecha transition, MODE SW abnormal is memorized. The content of abnormality can be confirmed in the abnormal detection mode explained in the later section. The content of abnormality can be confirmed in the abnormal detection mode explained in the later section. Automatic FL Display Remarks For deck mechanism unit. Press [ ] on main unit for next error.
Error Code Diagnosis Contents H01 Mode SW, plunger and capstan motor abnormal
H02
Rec INH SW abnormal
For deck mechanism unit. Press [ ] on main unit for next error.
H03
HALF SW abnormal
For deck mechanism unit. ] on main unit for Press [ next error.
F01
Reel pulse abnormal
For deck mechanism unit. ] on main unit for Press [ next error.
9.4.2.
Error Code Table For CD Changer Block
Automatic FL Display not the Remarks For CD unit (For Traverse). ] on main unit for Press [ next error.
Error Code Diagnosis Contents Description of error F15 RESET SW REST SW: ON is abnormal detected within specified time.
F26
Transmission error between CD Servo LSI IC and microprocessor IC Cam gear abnormality
IHMS
When set to CD mode, the sense signal does not turn "Low", a fail safe time after system command transmission is sent. Cam gear does not rotate to "HOME" position.
For CD unit (For Traverse). Press [ ] on main unit for next error.
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
ICSL
Cam gear/gear units abnormal
ISTK
Drive rack/gear assembly abnormal
Cam gear does not rotate to "PLAY" driving position and hence does not drive playing tray to "STOCK" position. The tray drive rack does not move to "STOCK" position. (Tray does not move to "STOCK" position) The tray drive rack does not move to "PLAY" position. (Tray does not move to "PLAY" position) UD Rack does not move to front direction. This lead to UD base not raise to top position. 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.
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
IPLY
Drive rack/gear assembly abnormal
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
ITOP
UD assembly
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
IUDS
UD assembly
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
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Error Code Diagnosis Contents Description of error HOME Cam gear/gear Cam gear does not move to assembly abnormal "HOME" position under following conditions 1. After tray is load to "PLAY" position. 2. After tray is unload to "STOCK" position. Tray unit does not move from "STOCK" to "PLAY" position
Automatic FL Display
Remarks For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
LOAD
Tray drive assembly abnormal
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
UNLD
Tray drive assembly abnormal
Tray unit does not move from "PLAY" to "STOCK" 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 assembly does not move upwards from tray 5 to tray 2
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
UDD
UD base asssembly abnormal
UD Base assembly does not move downwards from tray 1 to tray 5.
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
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. F2NG 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. SRVC_TRV To unlock the 1. All trays set to "STOCK" traverse unit for 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.
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.
RSET
Cam gear jam/close sensor faulty
For CD changer unit (CRS1). Press [SINGLE CHANGE] on main unit for next error.
9.4.3.
Error Code Table For Power Supply
Automatic FL Display Remarks For power. Press [ next error. ] on main unit for
Error Code Diagnosis Contents Description of error F61 Power Amp IC output Upon power on, abnormal PCONT=HIGH, DCDET=L after checking LSI.
9.4.4.
CRS1 Error Code display
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 for procedures to enter this mode.
23
SA-AK750GCP
· 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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SA-AK750GCP
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 24), if necessary. 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 (CRS1) · 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 USB P.C.B. · Disassembly of Tact Switch P.C.B. · Disassembly of Deck Mechanism Unit · Disassembly for Deck P.C.B. · Disassembly of Traverse Unit · Disassembly of Deck Mechanism · Disassembly of Deck Mechanism P.C.B. · Disassembly of cassette lid · Rectification for tape jam problem
Below shown is part no. of different screws types used:
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SA-AK750GCP
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-AK750GCP
10.3. Main Parts Location
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SA-AK750GCP
10.4. Disassembly of Top Cabinet
Step 1 Remove 3 screws on both sides on top cabinet. Step 2 Remove 5 screws at the rear. Step 3 Lift the sides of top cabinet outwards. Step 4 Push the top cabinet backwards to release catches. Step 5 Remove top cabinet.
10.5. Disassembly of CD Changer Unit (CRS1)
· Follow the (Step 1) - (Step 5) of Item 10.4 Step 1 Remove 1 screw at rear panel.
Step 2 Detach the FFC cables (CN2801 & CN2805) at Main P.C.B..
Step 3 Release the claws outwards on both ends.
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SA-AK750GCP
Step 4 Lift the CD changer unit upwards to remove it. · Disassembly of Mecha Chassis
Step 5 Remove 2 screws. Step 6 Remove the Mecha Chassis. Note: For disassembly & assembly of traverse unit, please refer to section 10.16 of this service manual.Please refer to original Service Manual for the Disassembly and Assembly of the CD Changer Unit (CRS1).
10.6. Disassembly of Rear Panel
· Follow the (Step 1) - (Step 5) of Item 10.4 Step 1 Remove 9 screws.
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SA-AK750GCP
Step 2 Detach cable CN2810 at Main P.C.B..
Step 3 Detach FFC cables (CN2801 & CN2805) at Main P.C.B..
Step 4 Remove rear panel.
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SA-AK750GCP
10.7. Disassembly of Main P.C.B.
· Follow the (Step 1) - (Step 5) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 · Follow the (Step 1) - (Step 4) of Item 10.6 Step 1 Detach FFC cables (CN2803, CN2806 & CN3200) at Main P.C.B.. Step 2 Remove Main P.C.B..
10.8. Disassembly of Transformer P.C.B.
· Follow the (Step 1) - (Step 5) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 · Follow the (Step 1) - (Step 4) of Item 10.6 Step 1 Detach cables (CN5950 & CN5951) at Transformer P.C.B.. Step 2 Remove 3 screws (Mounting screws for transformer to bottom chassis).
Step 3 Push the Transformer P.C.B. backwards to remove it.
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SA-AK750GCP
10.9. Disassembly of Power P.C.B.
· Follow the (Step 1) - (Step 5) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 · Follow the (Step 1) - (Step 4) of Item 10.6 · Follow the (Step 1) - (Step 3) of Item 10.7 Step 1 Remove the 5 screws on Power P.C.B..
Step 3 Remove IC5301 from heat sink unit. Note: For disassembly of IC5101, Q5101, Q5102, Q5111 and Q5112 repeat (Step 1) to (Step 2). (For information, IC5101, Q5101, Q5102, Q5111 and Q5112 does not have IC clip.) · Replacement of IC5501. Step 1 Flip the Power P.C.B. over and desolder the pins of IC5501. Step 2 Detach cable (CN5950) at Transformer 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 Power Amp IC (IC5301). Step 1 Flip the Power P.C.B. over and desolder the pins.
Step 2 Twist the heat sink leg as arrow shown.
Step 2 Remove 1 screw and IC clip.
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SA-AK750GCP
Step 3 Remove up the heat sink sub assembly (with IC5501). Step 4 Remove screw and IC clip. Step 5 Remove IC5501 from the sub assembly.
Caution: During assembly of the heat sink sub assembly (with IC5501) all soldering points is touch-up to avoid dryjoints.
10.10. Disassembly of Front Panel Unit
· Follow the (Step 1) - (Step 5) of Item 10.4 · Follow the (Step 1) - (Step 5) of Item 10.5 Step 1 Detach FFC cables (CN2803, CN2806 & CN3200) at Main P.C.B.. Step 2 Detach cable (CN5951) at Transformer P.C.B..
Step 4 Release 2 claws outwards.
Step 3 Bent the front panel unit slightly forward as arrow shown.
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SA-AK750GCP
Step 5 Remove the front panel unit. 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.
10.11. Disassembly for Panel P.C.B.
· Follow the (Step 1) - (Step 5) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 · Follow the (Step 1) - (Step 5) of Item 10.10 Step 1 Remove the volume knob.
Step 2 Remove 6 screws at Panel P.C.B.. Step 3 Release 8 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-AK750GCP
Step 2 Remove Lid. Note: Do not misplace the spring.
10.12. Disassembly of Tact Switch P.C.B.
· Follow the (Step 1) - (Step 5) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 · Follow the (Step 1) - (Step 5) of Item 10.10 Step 1 Remove 4 screws at Tact Switch P.C.B.. Step 2 Remove Tact Switch P.C.B..
10.13. Disassembly of USB P.C.B.
· Follow the (Step 1) - (Step 5) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 · Follow the (Step 1) - (Step 5) of Item 10.10 Step 1 Remove 2 screws at USB unit. Step 2 Remove USB unit.
Step 3 Remove USB bottom case as arrow shown.
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SA-AK750GCP
Step 4 Unsolder 4 points.
Step 5 Remove USB P.C.B..
10.14. Disassembly of Deck mechanism unit
· Follow the (Step 1) - (Step 5) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 · Follow the (Step 1) - (Step 5) of Item 10.10 Step 1 Remove the 4 screws.
Step 3 Tilt the cassette mechanism unit in the direction of arrow (1), and then remove it in the direction of arrow (2). Step 2 Push the lever upward, and then open the cassette lid ass'y. Note: For disassembly of parts for deck mechanism unit, refer to Section 10.17.
10.15. Disassembly of Deck P.C.B.
· Follow the (Step 1) - (Step 5) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 · Follow the (Step 1) - (Step 4) of Item 10.10 Step 1 Remove 2 screws.
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SA-AK750GCP
Step 3 Remove Deck P.C.B. Step 2 Desolder wire at deck motor terminals.
10.16. Disassembly of Traverse Unit
· Follow the (Step 1) - (Step 5) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 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 (5.3 Setting the Tray In "STOCK" position for CRS1 Service Manual order no. MD0509368C0)
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. Step 1: Press and hold the plunger lever and rotate the gear as arrows shown until it stop.
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SA-AK750GCP
Step 3: Remove the traverse unit as arrow shown. · Assembly of Traverse Unit
Step 2: Push the traverse slide plate as arrow shown to lock the traverse unit.
Step 1: Turn over the unit and install the traverse unit.
10.17. Disassembly for Deck Mechanism
· Follow the (Step 1) - (Step 4) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 · Follow the (Step 1) - (Step 5) of Item 10.10 · Follow the (Step 1) - (Step 3) of Item 10.14 · Follow the (Step 1) - (Step 3) of Item 10.15
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SA-AK750GCP
10.17.1. Replacement of Pinch Roller and Head Block
39
SA-AK750GCP
10.17.2. Replacement of Motor, Capstan Belt A, Capstan Belt B, and Winding Belt
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SA-AK750GCP
10.18. Disassembly of Deck Mechanism P.C.B.
· Follow the (Step 1) - (Step 4) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 · Follow the (Step 1) - (Step 5) of Item 10.10 · Follow the (Step 1) - (Step 3) of Item 10.14 · Follow the (Step 1) - (Step 3) of Item 10.15 Step 1 Remove 1 screw. Step 2 Desolder plunger terminals. Step 3 Release catches.
Step 4 Remove Deck Mechanism P.C.B..
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SA-AK750GCP
10.19. Disassembly of cassette lid
· Follow the (Step 1) - (Step 4) of Item 10.4 · Follow the (Step 1) - (Step 4) of Item 10.5 · Follow the (Step 1) - (Step 5) of Item 10.10 · Follow the (Step 1) - (Step 3) of Item 10.14 Step 1 Lift up the lever upward, open the cassette deck. Step 2 Remove spring and push the cassette lid in the direction of arrows.
10.20. Rectification for tape jam problem
· Follow the (Step 1) - (Step 5) of Item 10.4 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.
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SA-AK750GCP
Step 2 Push the lever upward and open the cassette lid. Remove the cassette tape. Note: Follow 10.19 Disassembly of cassette lid (Step1) to (Step 3). Remove the cassette tape.
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SA-AK750GCP
11 Service Fixture and Tools
Service Tools Extension FFC (A) Deck P.C.B. - Main P.C.B. REEX0485 (14 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.
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SA-AK750GCP
12.2. Checking and Repairing of Transformer P.C.B.
12.3. Checking and Repairing of Panel, Deck & Deck Mechanism P.C.B.
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SA-AK750GCP
12.4. Checking and Repairing of Power P.C.B.
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SA-AK750GCP
13 Procedure for Checking Operation of Individual Parts of Deck Mechanism Unit
13.1. Operation Check with Cassette Tape
1. Pull up the EJECT lever using a rubber band. (Fig. 6) 2. Supply DC5V to MOTOR. ( MOTOR rotates.) (Fig. 5) 3. Insert a cassette tape to the unit. 4. Supply DC9V to the plunger, and turn the power ON and OFF. ( Power +PL, -PL) (Fig. 5) a. FWD PLAY: Supply the plunger power in a flash. (ON: approx. 5msec) b. FWD FF: Supply the plunger power in a flash at PLAY mode. (ON: approx. 5msec) c. STOP: Supply the plunger power in a flash at FWD FF mode. (ON: approx. 5msec) d. REV PLAY: Supply the plunger power in a normal timing at STOP mode. (ON: approx. 200msec) e. REV REW: Supply the plunger power in a flash at REV PLAY mode. (ON: approx. 50msec) f. STOP: Supply the plunger power in a flash at FF mode. (ON: approx. 50msec) Repeat the operation ( FWD PLAY) (Note) Other operation may start if a timing of supplying the plunger power is missed.
13.1.1. Connection Status between Mechanism and Power Supply (Motor, Plunger)
13.1.2. Operative Parts of Deck Mechanism Unit (EJECT lever fitted with rubber band, Plunger/Rib operation)
Fig. 6
13.2. Operation Check without Cassette Tape
1. Pull up the EJECT lever using a rubber band. (Fig. 6) 2. Supply DC5V to MOTOR. ( MOTOR rotates.) 3. Lift up the mechanism unit's plunger/rib with the tip of a negative screwdriver, and operate the unit in the same timing as supplying the power. (Fig. 7)
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SA-AK750GCP
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SA-AK750GCP
14 Measurement And Adjustments
14.1. Cassette Deck Section
14.1.1. Requirements
· Test tape (QZZCFM) (QZZCWAT) · Normal blank cassette tape (QZZCRA) · Digital frequency counter · Oscilloscope · Electrical voltmeter · Headphone jack output jig (Fig 8)
14.1.2. Setting of Unit
· VOLUME: MAX
14.1.3. Preparations
1. Apply under [10. Assembling and disassembling]. 2. Remove 4 screws from the mechanism unit to disassemble. under [10.14 Disassembly of Deck Mechanism Unit]. 3. Connect the headphone jack output jig (Fig 8) to headphone jack.
Fig. 8
Fig. 9
14.1.4. Tape Speed Adjustment
· Normal speed adjustment (only during forward playback) (Product reference value: 3,000±90Hz) 1. Connect a frequency indicator. (Fig 10) 2. Playback the middle portion of the test tape (QZZCWAT). 3. Adjust the motor screw so that the following output level is produced. (Fig 11) Adjustment Range: 3,000 ± 90Hz (a constant speed)
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SA-AK750GCP
Fig. 10
Fig. 11
14.1.5. Bias Voltage Check
1. Connect an electrical voltmeter. (Fig 12) (Fig 9 for location of test points) 2. Set the function to "TAPE" position. 3. Insert a normal blank cassette tape (QZZCRA). / )] button, press [TAPE( 4. While pressing and holding down [REC( pressing the buttons till the recording pause mode is activated.) 5. Check that the output level is within the standard range. Standard Range: 16 ± 3mV )] button to pause the recording mode. (Repeat
Fig. 12
14.1.6. Bias Frequency Check
1. Connect a digital frequency counter (Fig 13). 2. Set the function to "TAPE" position. 3. Insert a normal blank cassette tape (QZZCRA) and press "REC" mode on main unit. 4. Check that the output frequency is within the standard range.
Standard Value: 98 ±8 kHz
Fig. 13
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SA-AK750GCP
15 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.
15.1. USB P.C.B.
15.2. CD Servo P.C.B.
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SA-AK750GCP
15.3. Power P.C.B. & Transformer P.C.B.
15.4. Panel P.C.B.
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15.5. Main P.C.B.
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15.6. Deck P.C.B.
15.7. Waveform Chart
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16 Wiring Connection Diagram
AUX
JK2803 CN3601
10 2 1
PbF
9 . . . . . 1
CN2810
H5104
TO TUNER PACK
. . . . . . .
FAN MOTOR
1 1
12 CN2809
. . . . . . .
2
. . . . .
21
. . . . .
E POWER P.C.B.
SOLDER SIDE
22
1
CN2801
B MAIN P.C.B.
SOLDER SIDE
22 21
. . . . .
2
. . . . .
1
TO CRS1 (CN1)
12 CN2808 15
. . . . . . . . . . . .
RIGHT SPEAKERS JK5101 LEFT SPEAKERS
CN3200
14
. . .
SUBWOOFER CN5103 JK5102
1
CN2805 CN2803
20 . . . . . . 2 21 . . . . . . . . .1
1
2
CN2806
30 . . . . . . . . 2 29 . . . . . . . . 1
PbF
1 . . . . . 12
1 . . . . . 12
CN5102
CAUTION RISK OF ELECTRIC SHOCK AC VOL TAGE LINE. PLEASE DO NOT T OUCH THIS P.C.B
MIC
MIC VOL
HEADPHONE
PbF
T5951 SUB-TRANSFORMER
JK6501 H6555 9 . . . . . . 1 VR6511 JK6551
CN5951
1
. . . . . . .
JK5950
AC IN
110 ~ 127V 220 ~ 240V
C PANEL P.C.B.
SOLDER SIDE
T5950 POWER TRANSFORMER
9 . . . . . . . 1
50/60Hz
9
VOLTAGE S5950 SELECTOR
CN5950
H TRANSFORMER P.C.B.
SOLDER SIDE
PbF
1
. . . . . . .
JW6002
PbF
10
PbF
1
2
. . . . .
. . . . .
Z6481 SENSOR
2
. . . . .
1
. . . . .
JW6001
1
. . . . . . .
21 22
USB
P901
29 30
VOLUME
P903
CN6601 VR6491 JK6751
PbF
10
I
USB P.C.B.
SOLDER SIDE (SIDE B)
MUSIC PORT
D SUB PANEL P.C.B.
PbF
SOLDER SIDE
9 . . . . . 1
CS971
PL+ PL-
SOLENOID
G DECK MECHANISM P.C.B.
SOLDER SIDE
A SERVO P.C.B.
SOLDER SIDE
4. .2 5. . . .1
PbF
CN7002
CP1301 TO R/P HEAD
22 21
. . . . . . . . . . . . . . . . .
F DECK P.C.B.
SOLDER SIDE
WR1903
2 1+
1
MOT OR
M
21 20
TRAVERSE MOTOR M7301
1615
M
SPINDLE MOTOR M7302
CN7001
CP1902
9 . . . . . 1
CN1305
2
1
.. .. .. .. .. .. .. .. . .. .. .
2
2 1
OPTICAL PICKUP
. . . . . . . . . . . . . .
PbF
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SA-AK750GCP
17 Block Diagram
17.1. CD Servo Diagram
OPTICAL PICKUP
SEMICONDUCTOR LASER
Q7601 LASER POWER DRIVE B STAT CN7002 CN2801 4 19 CN7002 CN2801 12 11 MLD MCLK B MDATA CN7002 CN2801 6 17 CN7002 CN2801 15 8 CN7002 CN2801 7 16 TO MAIN (2/2) TO MAIN (1/2)
PHOTO DETECTOR
A 81 X7201 80 70 69 67 68 51 53 52 54 55
ARFIN IREF DSLF PLLF
X2 (SMCK) (PMCK)
B B TO MAIN (1/2) B F CN7002 CN2801 3 20
3.3V 3.3V
79 REGON 82 NTEST 61 NSRVMONON 72 NRST
MCLK MDATA
PLLFO
X1
STAT
MLD
3.3V 3.3V A, B, C, D, E, F
47 AVDD2 31 AVSS2 35~40 A,B,C,D,E,F 42 41 50 49 48
LD PD
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
SUBCODE INTERFACE [DEMECC]
(SBCK) (SUBC) (TXNCLDCK) FLAG BLKCK 65 71 20 18
B E
ARFF
ARFFB ARFOUT ARFDC
B
IC7002 BA5948FPE2
VREF VREF
4 CH DRIVE
VREF 26
45 RFOUT 46 RFIN 43 CENV CTRCRS 32 OSCIN 34 VREF 44 RFENV
CMOS RF AMPLIFIER
SERVO CPU [DSV] BUS CONTROL UNIT [BCU]
CN7002 CN2801 5 18 3.3V
TO MAIN (2/2)
1Mbit DRAM
PRAMVDD33 PRAMVSS33
D0~D15 A0~A11 BA0,BA1
83~92,94~99 1~7,11~15 16,17 8,9 10,100
VREF
FOP 22 PC 21 SPOUT 23 TRVP 24 TRP 25 FOP 29 SRVMON0 30 SRVMON1
A/D CONVERTER
MP3/WMA DECORDER FS CONVERTER [FSC] SERIAL OUTPUT INTERFACE [DAO]
NWE,NCAS NRAS,SDRCK EXT0 EXT1 EXT2 (LRCK) (BCLK) (SRDATA)
F-
16 D3[CH3] 15 D3+ LEVEL SHIFT
FOCUS COIL
IN3
28
F+
62 63 64
T-
18 D4[CH4] 17 D4+ LEVEL SHIFT
OUTPUT PORT
TRACKING COIL
IN4
27
TRP
DIGITAL FILTER 1bitDAC PWM LOGIC [DF, MASH] REGULATOR ANALOG LOWPASS FILTER
T+
(DVDD2) 76
SPINDLE MOTOR
M7302
M TRVM SPSP+
TRV+
14 D2+ 13 D2-
[CH2]
LEVEL SHIFT
IN2
1
TRVP
DIGITAL OUT
AVSS1
IOVDD2
TRAVERSE MOTOR
M7301
12 D1+ 11 D1-
[CH1]
LEVEL SHIFT MUTE [CH1] MUTE [CH2]
IN1 3
SPOUT
PC1 4 PC2 2
PC
SERVO PROCESSOR/ DIGITAL SIGNAL PROCESSOR/ DIGITAL FILTER D/A CONVERTER
IC7001 MN6627954MA
66
57 58 59 56
60 78 26
76
28 93
27
IOVDD1
DRVDD
DVDD2
DVDD1
AVDD1
DVSS3
DVSS2
DVSS1
OUTR
OUTL
TX
77 S7201 REST SWITCH CN7002 CN2801 2 21 CN7002 CN2801 21 2 CN7002 CN2801 19 4 TO MAIN (1/2) TO MAIN (2/2)
3.3V 3.3V
3.3V 3.3V 3.3V LCH OUT RCH OUT
SA-AK750GCP CD SERVO BLOCK DIAGRAM
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SA-AK750GCP
17.2. Deck/ Deck Mechanism Diagram
IC1001 LCH 22
AN7326K
(DECK 1) .B. HEAD
DECK R/P IC
19 Q1101 MUTE SWITCH RCH 4 1 Q1304 MUTE SWITCH 16 Q1302 MUTE SWITCH DRIVER
CN1305 CN2803 8
(DECK 2) HEAD
CN1305 CN2803 9 CN1305 CN2803 16 CN1305 CN2803 12
TO MAIN (1/2)
15
8
17 6 9
CN1305 CN2803 13
(DECK 2) ERASE HEAD
L1301
Q1309,Q1310 BIAS SWITCH Q1317
Q1304 SWITCH
Q1303 SWITCH
CN1305 CN2803 14
Q1317 SWITCH
SWITCH
4 2 IC1000 C1AA00000612 3 5
M
9V
Q1316 SWITCH
9V Q1314 SWITCH
CN1305 CN2803 2
DECK MECHANISM CIRCUIT
CS971 CP1902 5 CS971 CP1902 3 CN1305 CN2803 21 CN1305 CN2803 1
TO MAIN (2/2)
ANALOG SWITCH
VREF IC971 CNB13030R2AU D971
9V Q1315 SWITCH
PHOTO INTERUPTOR
S971 S972 S975 MODE HALF RECINH_F
CS971 CP1902 1 CS971 CP1902 2 CS971 CP1902 6
CN1305 CN2803 6 CN1305 CN2803 4
SIGNAL LINES : MAIN SIGNAL LINE : AM SIGNAL LINE : FM SIGNAL LINE : TAPE RECORD SIGNAL LINE ( ) Indicates the Pin No. of Right Channel. : CD SIGNAL LINE : FM/AM SIGNAL LINE : AUX SIGNAL LINE : CD-DA (AUDIO/VIDEO) SIGNAL LINE : USB SIGNAL LINE : TAPE PLAYBACK SIGNAL
SA-AK750GCP DECK/DECK MECHANISM BLOCK DIAGRAM
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SA-AK750GCP
17.3. Main Diagram
IC2803 C1BB00001121
AUDIO SOUND PROCESSOR
IN-L1 IN-R1 IN-L2 IN-R2 IN-L3 IN-R3 IN-L4 IN-R4 OP-IN GV_OUT-L 55 REC-L 54 GV_OUT-R 16 2 3 6 5 Q2242 AGC CONTROL SWITCH IC3700 C0ABBB000244 L-OUT 42 R-OUT 37 Q2811 MUTE SWITCH Q2411 MUTE SWITCH Q2142 AGC CONTROL SWITCH 3 2 5 6
FROM DECK
CN1305 CN2803 8 CN1305 CN2803 9 CN3601 6 CN3601 8 CN7002 CN2801 21 2 CN7002 CN2801 19 4 CN6601 CN2806 22
1 2 3 4 5 6 7 8 56
OP-AMP
IC2804 C0AABB000125 1 HPF 7 Q2317 MUTE SWITCH Q2417 MUTE SWITCH LPF
TO TUNER PACK
CN2809 CN5102 5 CN2809 CN5102 6 CN2809 CN5102 8 CN2809 CN5102 9
FROM POWER
FROM CD SERVO
IC2810(2/2) C0ABBB000244 5 6
15V IC2810(1/2) C0ABBB000244 3 2 Q2554 SWITCH Q2553 SWITCH
CN2809 CN5102 4
SMT OP-AMP
7
SMT OP-AMP
1 Q2555 SWITCH
FROM PANEL
CN6601 CN2806 20 CN6601 CN2806 29
SMT OP-AMP
1 7
CN2809 CN5102 11
JK2803 AUX IN
11 IN-L6 12 IN-R6
REC-L 53 REC-R 17
Q2552 SWITCH DRIVER
Q2551 SWITCH DRIVER SW LVL1 SW LVL2
DATA
39
40 Q2511 MUTE SWITCH DRIVER
CN2806 CN6601 27 CN2806 CN6601 25
MUTEA
CLK
FROM PANEL
CN2803 CN1305 12 CN2803 CN1305 13
Q2501 LEVEL METER CONTROL SWITCH D2503 LM.1 ASPDA ASPCLK IDCDET
FROM DECK
TO FAN
CN2810 1 CN2810 2
D2947
Q2942 FAN MOTOR ON/OFF SWITCH
12V
Q2943 FAN SUPPLY CONTROL SWITCH
CN2809 CN5102 12
FROM POWER
Q2949 DC DETECT SWITCH
Q2948 DC DETECT SWITCH
D2946
SA-AK750GCP MAIN 1/2 DIAGRAM
59
SA-AK750GCP
SW LVL1 SW LVL2 MUTEA
IDCDET ASPDA ASPCLK LM.1
IC4000 C0DBZGC00067
2
GND
STBY 3 OUT 1
3.3 REGULATOR
D2813 15V 6V D3400 VREF 5V 5V 24 SW_LVL1 25 SW_LVL2 40 MUTE_A Q2803 RESET (MICRO-P) SWITCH Q2950 DECK SUPPLY CONTROL SWITCH Q2950 DECK SUPPLY CONTROL SWITCH D2811 26
ASP_DAT ASP_CLK LM_1
27 1
3.3V DVREF 12
/RESET EFP_RESET
7
FROM POWER
39
F_HOP MUTE_DA
CN5102 CN2809 1 CN5102 CN2809 3
IC2872 C0CBAHG000011
AV REGULATOR IC
IN
1 15V
CN1305 CN2803 5
3 56 QR3105
OUT
D2871-D2874
SWITCH
CN1305 CN2803 1
PLG FROM DECK
QR3106 SWITCH
58
CN1305 CN2803 2
MTR
97 95 59 57
DECK_AD2 DECK AD1 REC PHOTO
52
CN1305 CN2803 4 CN1305 CN2803 6 CN1305 CN2803 14 CN1305 CN2803 21
CE
22 30
D1 PLL_CLK
21
IC2801 C2CBYY000424
MICROPROCESSOR
60
TO TUNER PACK
74
CN3601 1 CN3601 2 CN3601 3 CN3601 4
SWITCH
DO
Q3601 15V
USB_IRQ/XM10
CN3200 P901 5
CN3601 7
D2937-D2941
15
Xout Xin
85
X2802 13
CN2805 4
CCW
84 80 86 83
CN3200 P901 8 CN3200 P901 10 CN3200 P901 11 CN3200 P901 13
10
FROM USB
CW HOME_SW ST_SW OPEN_SW
82
XciN Xcout
X2801 11
TO CRSI (CN1)
CLOSE_SW
33 87 55 54
PLAY_SW UP_SENSOR BOTTOM_SW
CN2805 1 CN2805 2 CN2805 5 CN2805 6 CN2805 7 CN2805 8 CN2805 11 CN2805 13 CN2805 14 CN2805 12
USB_RST(CLK)
CN3200 P901 15 CN3200 P901 16 CN3200 P901 17 CN3200 P901 18 CN3200 P901 19
78
MCLK
D2936
77
MDATA_OUT MLD BLKCK STATUS
88
76
Q2937 CHANGER PLUNGER ON/OFF SWITCH
FROM CD SERVO
19 75 81
PLUNGER
CD_RST /RESTSW STANDBY
51 90
79
CN2801 6 CN2801 7 CN2801 8 CN2801 15 CN2801 16 CN2801 17 CN2801 18 CN2801 19 CN2801 20 CN2801 21
Q2936 CD SUPPLY CONTROLSWITCH 50 47
CN7002 17 CN7002 16 CN7002 15 CN7002 8 CN7002 7 CN7002 6 CN7002 5 CN7002 4 CN7002 3 CN7002 2
VOL_LED VOL_JOG
70 71 72
DCDET FL_CS FL_DOUT FL_CLK FROM PANEL
92
46
PCONT/EFP/CS
3
41
CN6601 CN2806 17 CN6601 CN2806 16 CN6601 CN2806 13 CN6601 CN2806 12 CN6601 CN2806 11
EE_CS/EFP/EPM EE_CLK KEY3
93 94 18 20
EE_CS
4 43 42
EE_CLK
5
EE_DAT KEY2 KEY1 RMT SYNC
EE_DAT
-9V
12V
5V
3.3V
3.3V
5.3V
CN6601 CN2806 9 CN6601 CN2806 8 CN6601 CN2806 7 CN6601 CN2806 5 CN6601 CN2806 3
IC2871 E-EPROM IC (NOT SUPPLIED)
CN2808 CN5103 9 CN2808 CN5103 10 CN2808 CN5103 5 CN2808 CN5103 6 CN2808 CN5103 12 CN2808 CN5103 11 CN2808 CN5103 8 CN2808 CN5103 7 CN2808 CN5103 4
SA-AK750GCP MAIN 2/2 DIAGRAM
FROM POWER
SA-AK750GCP
17.4. Panel Diagram
FL6602 5-11
FL1
FL2
A2BD00000171
FL DISPLAY
H6555 CN5951 7 H6555 CN5951 6 H6555 CN5951 1 H6555 CN5951 2
TO TRANSFORMER
25-40
1
44
31-41
14-29 DIN 7
CN6601 CN2806 12 CN6601 CN2806 11 CN6601 CN2806 13 CN6601 CN2806 2
TO MAIN (2/2)
IC6601 C0HBB0000057
FL DRIVER
CLK STB
8 9
Z6481 REMOTE SENSOR
CN6601 CN2806 3 CN6601 CN2806 5
JK6501 MIC
Q6501 MIC AMP
Q6502 MIC AMP
VR6511 MIC VOLUME
CN6601 CN2806 29
TO MAIN (1/2) JK6751 M.PORT
CN6601 CN2806 20 CN6601 CN2806 22
S6201-S6207
CN6601 CN2806 8 CN6601 CN2806 25 CN6601 CN2806 27
TO MAIN (2/2) TO MAIN (1/2)
JK6551 HEADPHONE
SUB PANEL CIRCUIT
S6301-S6309
JW6601 JW6002 3 JW6601 JW6002 7
+VREF
CN6601 CN2806 9
VR6491 MIC VOLUME
JW6601 JW6002 2 JW6601 JW6002 4 JW6601 JW6002 10 JW6601 JW6002 9
QR6457 LED DRIVE QR6460 SUB PANEL P.C.B
+VREF
CN6601 CN2806 16
TO MAIN (2/2)
S6106-S6108
S6101-S6105
CN6601 CN2806 7 CN6601 CN2806 17
MOT10V
JW6601 JW6002 8
SA-AK750GCP PANEL DIAGRAM
61
SA-AK750GCP
17.5. Power Diagram
IC5301 2
C1AA00000755
CN2809 CN5102 6
TO MAIN (1/2) IN1+
JK5101 L5301
2CH DIGITAL AMP
OUT1 10 OUT2 14 RCH.H RCH.L 3 IN121 IN2+ Q5153 MODE SWITCH Q5173 SWITCH Q5154 MODE SWITCH 22 IN21 OSC 23 MODE VDDA1 20 VSSA1 18
SPEAKER
RCH SPEAKER RCH.HIGH SPEAKER RCH.LOW
CN2809 CN5102 9
RCH
TO MAIN (2/2)
CN2809 CN5102 3 CN2808 CN5103 8
IC5401 2
C1AA00000755
IN1+
2CH DIGITAL AMP
CN2809 CN5102 5 CN2809 CN5102 8
OUT1 10 OUT2 14 3 IN121 IN2+ 22 IN2TO MAIN (1/2) 1 OSC 23 MODE VDDA1 20 VSSA1 18
L4301
LCH.H LCH.L
LCH
SPEAKER LCH.HIGH SPEAKER LCH.LOW
LCH
IC5501 2
C1AA00000755
CN2809 CN5102 11
IN1+
JK5102 L5501
2CH DIGITAL AMP
OUT1 10 OUT2 14 3 IN121 IN2+ 22 IN2IC5201
SUBWOOFER
SUBWOOFER
C0JBAB000011
LOGIC
TO MAIN (2/2)
1 OSC 23 MODE
VDDA1 20 VSSA1 18
CN2809 CN5102 1
1 Q5201 FREQUENCY HOPPING SWITCH X5202 2
1A 1Y
5Y
10
3,6 2A,3Y 5 3A Q5202 FREQUENCY HOPPING SWITCH Q5103,Q5104 FAN ON/OFF SWITCH
X5201
TO MAIN (1/2)
CN2809 CN5102 12 CN2808 CN5103 4 CN2808 CN5103 7 CN2808 CN5103 11 CN2808 CN5103 9
D5126 Q5111 +15V REGULATOR Q5102 CURRENT CONTROL SWITCH Q5113 CURRENT LMIITER SWITCH Q5101,Q5110 CURRENT CONTROL SWITCH 26V REGULATOR Q5108,Q5109 SWITCH VOLTAGE REGULATOR
H5104 CN5950 1,2 H5104 CN5950 3,4 H5104 CN5950 8
TO TRANSFORMER
TO MAIN (2/2)
IC5101
Q5112,Q5114 CURRENT STABLISER 11V REGULATOR
C0DAZYY00005
CN2808 CN5103 10 CN2808 CN5103 5 CN2808 CN5103 6 CN2808 CN5103 4
D5130 4 1 5 5.6V 3.3V CTRL
REGULATOR IC
VCC 2
SA-AK750GCP POWER DIAGRAM
62
SA-AK750GCP
17.6. USB/ Transformer Diagram
IC951
C0DBZYE00002
6,7,8 OUT
VOLTAGE REGULATOR
VDD 2
IC900
MNZSFB5KJM1 D5V
X900 11 OSC1 12 OSC0
USB CONTROLLER IC
TO POWER NRST 14 CD_RST 8 CD_MLD 64 STIN 61 STREQ 54 TERR 51 STCLK 59 CD_DATA 58
H5104 CN5950 1,2 H5104 CN5950 3,4 H5104 CN5950 7
D5950-D5953, D5970-D5973
T5950 F2 S5950 SW VOLTAGE SELECTOR
FLAG
CTRL
P903
USB CONNECTOR
VBUS 1 D- 2 D+ 3
4
5
4 USBD6 USBD+
P901 CN3200 19 P901 CN3200 18 P901 CN3200 17 P901 CN3200 16 P901 CN3200 15 P901 CN3200 13 P901 CN3200 11 P901 CN3200 10 P901 CN3200 8 P901 CN3200 5
TO MAIN (2/2)
D5954-D5957
FP5950
H6555 CN5951 2 H6555 CN5951 1 H6555 CN5951 3 H6555 CN5951 6
TO PANEL
Q5951 VOLTAGE REGULATOR
CD_STAT 57 CD_CLK 56
Q5953 PCONT SWITCH Q5952 SYNCHRONISATION SWITCH T5951
MAIN TRANSFORMER
RL5950
I2C_REQ/WR_START 47 VERR 50
H6555 CN5951 7
SUB TRANSFORMER
D5966
F1 Z5950
L5950
JK5950
H6555 CN5951 4,5
Q5950 VOLTAGE REGULATOR
Q5954 CURRENT LIMITING SWITCH
D5963
D5951, D5952
SA-AK750GCP USB/TRANSFORMER DIAGRAM
63
SA-AK750GCP
64
SA-AK750GCP
18 Notes Of Schematic Diagram
(All schematic diagrams may be modified at any time with the development of new technology) Notes: S971: S972: S975: S5950: S6101: S6102: S6103: S6104: S6105: S6106: S6108: S6201: S6202: S6203: S6204: S6205: S6206: S6207: S6301: S6302: S6303: S6304: S6305: S6306: S6307: S6308: S6309: S7201: VR6491: VR6511: Mode switch. Half switch. Rec_Inh_F switch. Voltage Selector switch. Ac In ( ) switch. Multi Change ( ) switch. Open/ Close ( ) switch. Single Change ( ) switch. USB ( ) switch. Stop/ -Demo ( ) switch. H.Bass/ Subwoofer switch. CD1 ( ) switch. CD2 ( ) switch. CD3 ( ) switch. CD4 ( ) switch. CD5 ( ) switch. /FF/ ( ) switch. /Rew/ ( ) switch. Open ( ) switch. CD ( ) switch. Tape ( ) switch. Tuner switch. Music Port switch. Rec ( ) switch. M.EQ- switch. M.EQ switch. M.EQ+ switch. Rest switch. VR Volume jog. VR Mic Volume jog. : CD Signal line : Tape Record Signal line : Tape Playback Signal line : USB Signal line : FM/AM Signal line : Main Signal line : Aux Signal line : Mic Signal line
· Importance safety notice : Components identified by mark have special characteristics important for safety. Furthermore, special parts which have purposes of fireretardant (resistors), high-quality sound (capacitors), lownoise (resistors), etc. are used. When replacing any of components, be sure to use only manufacturer´s specified parts shown in the parts list. · Resistor Unit of resistance is OHM [] (K=1,000,000). · Capacitor Unit of resistance is µF, unless otherwise noted. F=Farad, pF=Pico-Farad · Coil Unit of inductance is H, unless otherwise noted. · Voltage and Signal lines: : +B Signal line : -B Signal line : CD DA Signal line
65
SA-AK750GCP
66
SA-AK750GCP
19 Schematic Diagram
19.1. (A) CD Servo Circuit
1 2 3 4 5 6 7 8 9 10 11 12 13 14
A
SCHEMATIC DIAGRAM - 1 OPTICAL PICKUP CIRCUIT (FOR REFERENCE ONLY)
W7022 R7601 4.7 LASER DIODE 6 8 1 2 3 11 12 C C 4 5 6 7 8 1 GND NBOUT 8 9 10 2 VCC C 4 9 3 BIN NAOUT 6 GND 7 11 12 13 14 4 AIN VREF 5 C 15 16 C7601 6.3V33 C7670 0.1 C7626 0.1 0 W7020 0 W7019 0 W7018 0
A
CD SERVO CIRCUIT
: + B SIGNAL LINE
: CD DA SIGNAL LINE
: CD SIGNAL LINE
62 14
CN7001
VCC F E LD LD GND GND A GND (GUARD) B VREF LPD 1 2 3 4 5 6 7 8 9 10
Q7601
W7025 0
B1ADCF000001
LASER POWER DRIVE W7017 0 R7650 5.6 W7023 0 C7613 0.1 C7218 0.082 C7241 1000P 0 0 R7212 820 C7614 6.3V100 R7217 1k C7225 1000P C7226 1000P R7221 100 R7218 1k
D7650 MAZ80560ML
62 16
62 19
50V1
B
B
62 18 C7227
C7228 50V1
62 51
(RF) W7014 W7026
62 17
C7231 6.3V220 W7005 0
W7021
11
C7217
GND (GUARD) 12 TT+ 13 14
0
0.1 R7211 82k
C
10 5
F- 15 F+ 16 C7244 0.015
C7230 0.1
C
62 24
62 13
LB7262 LB7263 LB7264
LB7262-LB7264 D0GBR00JA008
2 3
62 28
C VREF
W7012 C7223 6.3V4.7 0
C7216 680P C7263 0.1 W7010 0 C7234 0.1
C7203 6.3V220
C7161 0.1 50
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
CN7002
22 AGND LCH OUT AGND RCH OUT DGND ST_IN ST_CLK ST_REQ 3.3V DGND LD SW TX 7.5V PGND MCLK MDATA MLD BLKCK STAT RST RESET_SW LOADING 21 20
ARFIN
PLLF0
OUTR
PLLF
OUTL
DSLF
NRST
IREF
FLAG
EXT0
EXT1
EXT2
MLD
TX
DQSYTXT
DVSS3
MCLK
BLKCK
SMCK
NSRVMONON
AVSS1
AVDD1
MDATA
PMCK
STAT
W7016
76
W7009 0
C7204 0.1
48 ARFDC C7102 0.47 47 AVDD2 46 RFIN [50] ARFFB [49] ARFOUT
DVSS2 78 REGON 79 X2 80 X1 81 NTEST 82 D2 83 D1 84 D0 85
0
0
W7011
0
W7015
49
77
C7235 6.3V10
W7008 0 C7253 470P W7006 0 W7007 0 W7029 0
19 18 17 16 15 14 13 12 11
D
W7013
C7142 3300P
DVDD2 [76] IODD1 [77]
D
0
62 50
C7107 0.022
45 RFOUT 44 RFENV 43 CENV 42 LD 41 PD 40 A 39 C
62 12
W7028 0 C7243 0.1
TO MAIN CIRCUIT (CN2801) IN SCHEMATIC DIAGRAM - 4
IC7001 MN6627954MA
SERVO PROCESSOR/ DIGITAL SIGNAL PROCESSOR/ DIGITAL FILTER D/A CONVERTER
D3 86 D4 87 D5 88 D6 89 D7 90 D15 91 D14 92 DRVDD 93 C7233 0.1 C7232 6.3V220
10 9 8 7 6 5 4
W7024 0
38 B 37 D 36 F
E
35 E
62 90
GND1 R7327 1k TRV GAIN R7349 18k
34 VREF R7111 10k 33 CTRCRS 32 OSCIN 31 AVSS2
62 8 62 9 62 31
C7264 0.1
R7253 10
62 7
E
D13 94 D12 95 [26] DVSS1 SDRCK [100] D11 96 D10 97 D9 98
62 4
R7254 1K
62 3
S7201 REST SW
3 2
PRAMVDD33
PRAMVDD15
NRAS
FOP
NWE
TRP
BA1
BA0
A10
PC
A0
A1
A2
A3
A4
A5
A6
A7
A8
FO GAIN
R7328
10k
C7339 0.018
R7214 470
R7339 1k
C7164
IN4
D3-
D4-
D4+
PGND1 PGND2
D3+
PVCC2
VCC
GND
VREF
IN3
NC
NC
NC
NC
F
C7335 0.1
10u
14
16
17
18
19
20
21
22
23
24
25
26
27
28
R7330 5.6K
25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
A9
26
A11
R7329 1k
NCAS
TRVP
27 IODD2
SPOUT
C7352 0.018
C7154 C7155
0.1 0.1
28 DVDD1
PRAMVSS33
R7336 10
62 88 62 89
30 SRVMON1 29 SRVMON0
W7003 0
W7001 0
C7166 0.01
62 1 62 2
1
D8 99 100
2
1
W7002 0
W7004 0
R7220 1M
10u
PVCC1
PC1
D2+
D1+
D2-
D1-
PC2
IN1
GND
13
13
12
11
10
9
8
7
6
5
4
3
2
IN2
NC
NC
NC
NC
C7334 10V220
BA5948FPE2
4 CH DRIVE IC C7338 0.056 R7323 3.3k R7331 22k R7315 3.3k
62 87 62 86
IC7002
C7315 0.47
C7165
X7201 H2B169500005
1
3
F
2
1
W7027
R7325 330
62 11
R7332 1k
0
G
62 39
62 38 62 37
+ +
R7335 100
62 10
G
62 36
M7301 TRAVERSE MOTOR
M7302 SPINDLE MOTOR
H
SA-AK750GCP CD SERVO CIRCUIT
H
1
2
3
4
5
6
7
8
9
10
11
12
13
14
67
SA-AK750GCP
19.2. (B) Main Circuit
1 2 3 4 5 6 7 8 9 10 11 12 13 14
A
SCHEMATIC DIAGRAM - 2
MAIN CIRCUIT
: +B SIGNAL LINE
: CD SIGNAL
: TAPE RECORD SIGNAL LINE
W581 0 R2161 10K C2263 16V1u C2181 1
: TAPE PLAYBACK SIGNAL LINE
R2173 4.7K
: FM/AM SIGNAL LINE
: MAIN SIGNAL LINE
: AUX SIGNAL LINE
: MIC SIGNAL LINE
R2182 C2182 0 1 R2181 680 R2183 1k C2175 3300P 0.22u C2183 C2173 0.01uC2174 C2171 0.01u C2172 0.1u C2301 0.056u 1
MIC
R2172 8.2K
R2301 15K C2302 0
B
MIC_MIX C2112 C2212 C2122 C2222 C2132 C2232 C2152 C2252 1u 1u 1u 1u 1u 1u 1u 1u
Q2311,Q2411 B1ABGC000005 MUTING SWITCH
C2311 1u R2311 470
C2705 1u R2705 3.3k W584 0 R2313 100k C2312 1u
IC2804 C0AABB000125 OP AMP
R2703 220K C2703 470P 4 3 C2313 R2315 47P 56K C2314 10P 2 1 C2315 50V22
C1
R2163 56K
C
REF-OUT GV_OUT-R REC-R PRE-VIN-R HB-MIX HB-MIX-OUT HB-FLT-OUT HARMIN HARMOUT HB-ATT-IN HB-ATT-OUT HB-LPF-IN HB-LPF-OUT NC
C2113 6800P
C2274 0.01u
C2142 1u C2242 1u W619 0
C2191 50V4.7
C2192 D2191 R2193 0.1u 4.7k C2193 1u
B0BC9R000008 C2583 16V100
C2588 0.1u
C2702 16V100
D2583
R2702 1k
C2701 0.01u
C2282 1u
D QR3105
W579 0
C2275 3300P R2273 C2273 4.7k 0.01u R2271 6.8k
QR3105,QR3106 B1GBCFGG0030 SWITCH QR3106
PL 1 MOTOR_H 2 MO_GND 3 R2111 DECK_AD2 4 2.2K MOTOR 9V 5 DECK_AD1 6 R2211 +9V 7 PB_L 8 PB_L 2.2K PB_R 9 PB_R R2112 3.3K A_GND 10 A_GND A_GND 11 REC_IN_L 12 REC_IN_R 13 REC_H 14 BP 15 DMT 16 DVREF 17 VREF-GND 18 DGND 19 +5V 20 PHOTO 21
IC2872 C0CBAHG000011 VOLTAGE REGULATOR
OUT 3 2 GND VCC 1 W580 0 D2871 D2872 D2871-D2872 B0EAKM000117
+15V
REF_L D2503 B0ADCC000002 2 1 R2507 100k C2507 16V0.22u
R2509 560
R2584 330k R2586 1.2k W678 0
IC2803 1 42 C1BB00001121 2 41 AUDIO SOUND PROCESSOR 3 40 [42] L-OUT 4 IN-R2 [1] IN-L1 39 [41] NC 5 IN-L3 [2] IN-R1 [40] DATA VCC 38 [3] IN-L2 [39] CLK R-OUT 37 6 IN-R3 7 IN-L4 IC2803 POST-VM-R 36 C2401 0.22u R2401 C2402 15K 8 IN-R4 [32] MID-R2 T-OUT-R 35 C2272 1 0.082 [31] MID-R1 BASS-R2 34 9 IN-L5 [12] IN-R6 [13] GND [30] TRE-R BASS-R1 C2271 0.15 33 10 IN-R5 [14] REF-IN [29] NC 11 IN-L6 32 1