Aiwa-CDC-X237-X437-Service-Manual 电路图 维修手册.pdf

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1、1 Ver 1.0 2003. 01 Model Name Using Similar MechanismNEW CD Drive Mechanism TypeMG-930A-185 Optical Pick-up NameOPTIMA-752B2 SERVICE MANUALUS Model Canadian Model CDC-X237/X437 AEP Model UK Model CDC-X237 CDC-X237/X437 RADIO SECTION (US, Canadian model) (FM) Frequency Range: 87.5 MHz 108 MHz Usable

2、Sensitivity: 12.7 dBf 50 dB Quieting Sensitivity: 17.2 dBf IF Rejection: 100 dB Frequency Response: 30 Hz 15,000 Hz S/N Ratio: 70 dB Stereo Separation: 35 dB at 1 kHz Alternate Channel Selectivity: 90 dB Capture Ratio: 3 dB (AM) Frequency Range: 530 kHz 1,710 kHz Usable Sensitivity: 30 V (30 dB) RAD

3、IO SECTION (AEP, UK model) (FM) Frequency Range: 87.5 MHz 108 MHz Intermediate frequency: 10.7 MHz Usable Sensitivity: 12.7 dBf 50 dB Quieting Sensitivity: 17.2 dBf IF Rejection: 100 dB Frequency Response: 30 Hz 15,000 Hz S/N Ratio: 67 dB Stereo Separation: 35 dB at 1 kHz Alternate Channel Selectivi

4、ty: 90 dB Capture Ratio: 3 dB (MW) Frequency Range: 531 kHz 1,602 kHz Intermediate frequency: 10.71 MHz/450 kHz Usable Sensitivity: 30 V (30 dB) (LW) Frequency Range: 144 kHz 288 kHz (1-kHz/9-kHz steps) Intermediate frequency: 10.71 MHz/450 kHz Usable Sensitivity: 30 V (30 dB) SPECIFICATIONS CD SECT

5、ION Frequency Response: 17 Hz 20 kHz +0/3 dB Dynamic Range: More than 85 dB Channel Separation: More than 60 dB S/N Ratio: More than 90 dB Wow/Flutter: Unmeasurable AUDIO SECTION Max. Power Output: 45 W 4 channels AUX Input Input sensitivity (load impedance) AUX: 300 mV (10 k) The tuner and CD secti

6、ons have no adjustments. Sony Corporation e Vehicle Company Published by Sony Engineering Corporation 9-877-001-01 2003A0400-1 2003. 01 Continued on next page FM/AM COMPACT DISC PLAYER CDC-X237/X437 FM/MW/LW COMPACT DISC PLAYER CDC-X237 RadioFans.CN 收音机爱 好者资料库 2 CDC-X237/X437 CAUTION Use of controls

7、 or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPL

8、ACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFIS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE

9、FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PICES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPLMENTS PUBLIS PAR SONY. GENERAL Power-Supply Voltage: 14.4 V (11 to 16 V allowable), DC, negative ground Load Impedance: 4 Tone Control: Bass 10 dB at 100 Hz, Treble 10 dB at

10、10 kHz Preamp Output Voltage (load impedance): 2.2 V (10 k) Installed size: 182 (W) 53 (H) 155 (D) mm (7 1/4 (W) 2 1/8 (H) 6 1/8 (D) inches) Supplied Accessory: Carrying case (1) CARD REMOTE CONTROL (CDC-X437) Dimensions: approx. 33 (W) 85 (H) 7.5 (D) mm (1 5/16 (W) 3 3/8 (H) 5/16 (D) inches) Weight

11、: approx. 20 g (0.7 oz.) (including battery) Specifications and external appearance are subject to change without notice due to product improvement. SERVICE NOTES NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic breakdown

12、because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic breakdown and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged a

13、nd should be handled with care. NOTES ON LASER DIODE EMISSION CHECK The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick- up block. Therefore, when checking the laser diode emission, ob- serve from more than 30 cm a

14、way from the objective lens. Notes on Chip Component Replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be dam- aged by heat. US, Canadian model AEP, UK model CAUTION Use of controls or adjustments or performance of procedures other than tho

15、se specified herein may result in hazardous radiation exposure. This compact disc player is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the exterior. RadioFans.CN 收音机爱 好者资料库 3 TABLE OF CONTENTS 1. GENERAL Connections . 4 2. DISASSEMBLY 2-1. Sub Panel Assy . 6

16、 2-2. CD Mechanism Block . 6 2-3. Main Board Section . 7 2-4. Main Board . 7 2-5. Heat Sink (CT) . 8 2-6. Sub Board. 8 2-7. Servo Board. 9 2-8. Floating Block Assy . 9 2-9. Lever Assy (CD Up Holder). 10 2-10. Lever (CD Roller) Sub Assy . 10 2-11. Lever Assy (CD Holder) . 11 2-12. Motor (Sled) Sub As

17、sy . 11 2-13. Pick-up Sub Assy . 12 3. DIAGRAMS 3-1. IC Pin Descriptions . 13 3-2. Block Diagram CD Section. 17 3-3. Block Diagram Main Section. 18 3-4. Block Diagram Front Section. 19 3-5. Circuit Boards Location . 19 3-6. Printed Wiring Boards CD Mechanism Section. 20 3-7. Schematic Diagram CD Mec

18、hanism Section. 22 3-8. Printed Wiring Board Main Section . 23 3-9. Schematic Diagram Main Section (1/2). 24 3-10. Schematic Diagram Main Section (2/2). 25 3-11. Printed Wiring Boards Front Section . 26 3-12. Schematic Diagram Front Section . 27 3-13. IC Block Diagrams. 28 4. EXPLODED VIEWS 4-1. Cha

19、ssis Section . 30 4-2. Front panel Section . 31 4-3. CD Mechanism Section (1). 32 4-4. CD Mechanism Section (2). 33 5. ELECTRICAL PARTS LIST. 34 CDC-X237/X437 RadioFans.CN 收音机爱 好者资料库 4 CDC-X237/X437 SECTION 1 GENERAL This section is extracted from instruction manual. 5 CDC-X237/X437 SECTION 2 DISASS

20、EMBLY Note : This set can be disassemble according to the following sequence. 2-1.SUB PANEL ASSY (Page 6) 2-2.CD MECHANISM BLOCK (Page 6) 2-6.SUB BOARD (Page 8) 2-7.SERVO BOARD (Page 9) SET 2-13. PICK-UP SUB ASSY (Page 12) 2-4.MAIN BOARD (Page 7) 2-5.HEAT SINK (CT) (Page 8) 2-3.MAIN BOARD SECTION (P

21、age 7) 2-8.FLOATING BLOCK ASSY (Page 9) 2-9.LEVER ASSY (CD UP HOLDER) (Page 10) 2-10. LEVER (CD ROLLER) SUB ASSY (Page 10) 2-11. LEVER ASSY (CD HOLDER) (Page 11) 2-12. MOTOR (SLED) SUB ASSY (Page 11) 6 CDC-X237/X437 2-2. CD MECHANISM BLOCK Note : Follow the disassembly procedure in the numerical ord

22、er given. 2-1. SUB PANEL ASSY 4 sub panel assy 3 claws 2 claws 1 B 2.6x6 3 CON701 6 CD mechanism block 5 holder (CD mecha) 1 PTT 2.6x6 2 PTT 2.6x6 4 P 2.6x4 7 CDC-X237/X437 2-4. MAIN BOARD 2-3. MAIN BOARD SECTION 2 cover 3 insulation sheet 4 Removal the solder. 7 MAIN board section 5 Removal the sol

23、der. 6 Removal the solder. 1 PTP 2.6x4 0 MAIN board 1 PTT 2.6x6 4 PTT 2.6x6 6 side chassis (L) 8 side chassis (R) 9 front chassis 5 PTT 2.6x6 3 PTT 2.6x6 7 PTT 2.6x6 2 PTT 2.6x6 8 CDC-X237/X437 2-5. HEAT SINK (CT) 2-6. SUB BOARD 4 heat sink (CT) 1 screw (2.6x8) 2 P 3x12 3 PTT 2.6x8 3 SUB board 1 Rem

24、oval the solders. 2 P 1.4x2 black brown blue 9 CDC-X237/X437 2-8. FLOATING BLOCK ASSY 2-7. SERVO BOARD 3 PTT 2x3 4 screws (M1.7x4) 5 SERVO board 2 PIC2 FLEXIBLE board 1 Removal the solders. white gry orange blue black red 1 tension spring 2 tension spring 3 tension spring qd floating block aasy 4 te

25、nsion spring 5 tension spring 6 claw 7 claw 8 claw qa oil-damper qs oil-damper 9 0 10 CDC-X237/X437 2-9. LEVER ASSY (CD UP HOLDER) 2-10. LEVER (CD ROLLER) SUB ASSY 1 P 1.4x2 3 special screw 4 tension spring 5 lever assy (CD up holder) 2 leaf spring (roller) 3 lever (CD roller) sub assy 1 2 11 CDC-X2

26、37/X437 2-11. LEVER ASSY (CD HOLDER) 2-12. MOTOR (SLED) SUB ASSY 2 special screw 1 torsion spring 4 lever assy (CD holder) 3 1 P 1.7x2 2 motor (sled) sub assy 12 CDC-X237/X437 2-13. PICK-UP SUB ASSY 1 B 1.4x5 2 leaf spring 3 pick-up sub assy 13 CDC-X237/X437 3-1. IC PIN DESCRIPTIONS IC202 LC78622NE

27、(DIGITAL SIGNAL PROCESSOR) (SERVO BOARD) Pin No.Pin NameI/OPin Description 1DEFIIDefect detection signal (DEF) input (Must be connected to 0 V when unused.) 2TAIITest input pin A pull-down resister is built-in. Must be connected to 0 V. 3PDOOExternal VCO control phase comparator output 4VVSSInternal

28、 VCO ground pin Must be connected to 0 V. 5ISETPDO output current adjustment resister connection pin 6VVDDInternal VCO power supply pin 7FRVCO frequency range adjustment 8VSSDigital system ground pin Must be connected to 0 V. 9EFMOOEFM signal output 10EFMINIEFM signal input 11TEST2ITest input pin A

29、pull-down resister is built-in. Must be connected to 0 V. 12CLV+ODisc motor control signal output 13CLVOCan be set to three-value output by microprocessor command. 14V/PO Rough servo/phase control automatic switching monitor output Outputs a high level during rough servo a low level. 15HFLITrack det

30、ection signal input This is a schmitt input. 16TESITracking error signal input This is a schmitt input. 17TOFFOTracking off signal output 18TGLOTracking gain switching signal output Increase the gain when low. 19JP+OTrack jump control signal output 20JPOThree-value output is also possible when speci

31、fied by microprocessor command. 21PCKO EFM data playback clock monitor signal output Output pin 4.3218 MHz when the phase is locked. Not used. (Open) Synchronization signal detection signal output 22FSEQOOutput a high level when the Synchronization signal detected from the EFM signal and the interna

32、ly generated synchronization signal range. Not used. (Open) 23VDDDigital system power supply pin 24CONT1I/OGeneral-purpose input/output 1 5 25CONT2I/OControlled by serial data commands from the microprocessor. 26CONT3I/OAny of these that are unused must be either set up as input pin ports and connec

33、ted to 27CONT4I/O0 V, or set up as output pin ports and left open. 28CONT5I/ONot used. (Open) De-emphasis monitor signal output 29EMPHOA high level indicates playback of a de-emphasis disc. General-purpose input/output pin 6. Not used. (Open) 30C2FOC2 flag output pin Not used. (Open) 31DOUTODigital

34、out signal output (EIJA format) Not used. (Open) 32TEST3ITest input pin A pull-down resister is built-in. Must be connected to 0 V. 33TEST4ITest input pin A pull-down resister is built-in. Must be connected to 0 V. General-purpose input/output command identifying pin A pull-down resister is built-in

35、. Must be connected to 0 V when used with functions 34PCCLIsimilar to those of LC78622E. H: Control possible only for the general-purpose input/output port command. L: Control possible for all commands. 35LMUTEOLeft channel mute signal output General-purpose input/output pin 7 36LVDDLeft channel pow

36、er supply pin 37LOUTOLeft channel output 38LVSSLeft channel ground pin Must be connected to 0 V. 39RVSSRight channel ground pin Must be connected to 0 V. 40ROUTORight channel output 41RVDDRight channel power supply pin SECTION 3 DIAGRAMS 14 CDC-X237/X437 Pin No.Pin NameI/OPin Description 42RMUTEORig

37、ht channel mute signal output General-purpose input/output pin 8 43XVDDCrystal oscillator power supply pin 44XOUTO Connections for a 16.9344 MHz crystal oscillator element pin 45XINI 46XVSSCrystal oscillator ground pin Must be connected to 0 V. 47SBSYOSubcode clock synchronization signal output Not

38、used. (Open) 48EFLGOC1, C2, signal and double error correction monitor pin Not used. (Open) 49PWOSubcode P, Q, R, S, T, U and W output Not used. (Open) 50SFSYO Subcode frame synchronization signal output This signal falls when the subcode are in standby stase. Not used. (Open) 51SBCKI Subcode readou

39、t clock input This is a schmitt input. (Must be connected to 0 V when unused.) 52FSXO Output pin for the 7.35 kHz synchronization signal divided from the crystal oscillator Not used. (Open) 53WRQOSubcode Q output standby output 54RWCIRead/write control signal input This is a schmitt input 55SQOUTOSu

40、bcode Q signal output 56COINICommand input pin from system control microprocessor 57CQCKI Input for both the command input acquisition clock and the SQOUT pin subcode readout clock input pin This is a schmitt input. 58RESIReset signal input This pin must be set low briefly after power is first appli

41、ed. 59TST11OTest output pin Leave open. (Normally output a low level.) Not used. (Open) 6016MO16.9344 MHz output pin Not used. (Open) 614.2MO4.2336 MHz output pin 62TEST5ITest input pin A pull-down resister is built-in. Must be connected to 0 V. 63CSI Chip select signal input A pull-down resister is

42、 built-in. Must be connected to 0 V if not controlled. 64TEST1ITest input pin No pull-down resister. Must be connected to 0 V. 15 CDC-X237/X437 IC901 LC72358N-9B50 (SYSTEM CONTROL) (MAIN BOARD) Pin No.Pin NameI/OPin Description 1XINISystem clock oscillator input (4.5 MHz) 2TEST2Not used. (Open) 3CD

43、DATA INNot used. (Open) 4NCNot used. (Open) 5NCNot used. 6E-VOL DOODate output for volume level control 7LCD DIILCD driver date signal input 8LCD DOOLCD driver date signal output 9LCD CLOOLCD driver clock signal output 10LCD CEOLCD driver CE signal output 11SQ OUTISub-code Q input terminal 12COINOCo

44、mmand output terminal for DSP 13CQCKO Transfer-out clock for command output or output terminal for sub-code transfer clock from SQ OUT 14SD/STI Stereo signal input when receiving “H”=MONO, “L”=ST FM reception. Channel detection signal input when FM/AM seeking “H”=detect channel. 15LOC/DXOLOC/DX switching output when in the radio seek mode “H”=LOC, “L”=DX. 16IF REQOIF count signal request output 17NCFM/AM power switch output “H”=A