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Sony WX-C570 Service Manual

Changer control audio master. us model uk model e model
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SERVICE MANUAL
SPECIFICATIONS
AUDIO POWER SPECIFICATIONS (US Model)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
17 watts per channel minimum continuous average power into 4 ohms,
4 channels driven from 20 Hz to 20 kHz with no more than 1 % total
harmonic distortion.
Other Specifications
CD player section
Signal-to-noise ratio
88 dB
Frequency response
10 - 20,000 Hz
Wow and flutter
Below measurable limit
Laser Diode properties
Material
GaAlAs
Wavelength
780 nm
Emission Duration
Continuous
Laser output power
Less than 44.6 µW*
* This output is the value measured at a distance of
200 mm from the objective lens surface on the Optical
Pick-up Block.
Cassette player section
Tape track
4-track 2-channel stereo
Wow and flutter
0.08 % (WRMS)
Frequency response
30 - 18,000 Hz
Signal-to-noise ratio
Cassette type
Dolby B NR
TYPE II, IV
67 dB
TYPE I
64 dB
MICROFILM
Dolby NR off
58 dB
55 dB
CHANGER CONTROL AUDIO MASTER
WX-C570
Model Name Using Similar Mechanism
CD
CD Drive Mechanism Type
Section
Optical Pick-up Name
Model Name Using Similar Mechanism
TC
Section
Tape Transport Mechanism Type
Tuner section
FM
Tuning range
US model:
87.5 - 107.9 MHz
UK, E model:
FM tuning interval:
50 kHz/200 kHz switchable
87.5 - 108.0 MHz
(at 50 kHz step)
87.5 - 107.9 MHz
(at 200 kHz step)
Antenna terminal
External antenna connector
Intermediate frequency 10.7 MHz
Usable sensitivity
9 dBf
Selectivity
75 dB at 400 kHz
Signal-to-noise ratio
65 dB (stereo),
68 dB (mono)
Harmonic distortion at 1 kHz
0.5% (stereo),
0.3% (mono)
Separation
35 dB at 1 kHz
Frequency response
30 - 15,000 Hz
Capture ratio
4 dB
– 1 –
US Model
UK Model
E Model
NEW
MG-338X-121
KSS-520A
XR-1750
MG-52A-135
– Continued on next page –

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  Summary of Contents for Sony WX-C570

  • Page 1 WX-C570 SERVICE MANUAL US Model UK Model E Model SPECIFICATIONS Model Name Using Similar Mechanism CD Drive Mechanism Type MG-338X-121 Section AUDIO POWER SPECIFICATIONS (US Model) Optical Pick-up Name KSS-520A POWER OUTPUT AND TOTAL HARMONIC DISTORTION 17 watts per channel minimum continuous average power into 4 ohms,...
  • Page 2 THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. parts. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE The flexible board is easily damaged and should be handled with PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR care.
  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1. GENERAL 4. MECHANICAL ADJUSTMENTS ......24 Location of Controls ............... 4 Getting Started ................ 4 5. ELECTRICAL ADJUSTMENTS Setting the Clock ..............4 Tape Section ................. 24 CD Player ................5 Tuner Section ................ 25 Cassette Player ............... 5 CD Section ................
  • Page 4: General

    SECTION 1 GENERAL This section extracted from E model’s instruction manual. – 4 –...
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  • Page 11: Disassembly

    SECTION 2 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 2-1. FRONT PANEL 7 cover 5 PTT 2.6x6 6 PTT 2.6x10 4 PTT 2.6x6 3 PTT 2.6x6 9 claws 1 PTT 2.6x14 2 PTT 2.6x6 0 front panel assy 8 claws 2-2.
  • Page 12: Cd Mechanism Block

    2-3. CD MECHANISM BLOCK 6 bracket (CD) 5 PTT 2.6x6 4 CD mechanism block 1 PTT 2.6x10 2 PTT 2.6x6 3 CN401 2-4. HEAT SINK 1 PTT 2.6x10 4 heat sink 2 PTT 2.6x10 3 PTT 2.6x10 – 12 –...
  • Page 13: Cd Board

    2-5. CD BOARD 3 CN403 2 CN404 4 ground point screws (PTT 2.6x6) 6 CD board 1 CN802 5 claw 2-6. TAPE MECHANISM BLOCK 3 PTT 2.6x6 5 tape mechanism block 4 CN305 2 PTT 2.6x6 1 CN304 – 13 –...
  • Page 14: Main Board

    2-7. MAIN BOARD 2 MAIN board 1 ground point screws (PTT 2.6x6) 3 insulating sheet 2-8. CHASSIS (T) ASSY 5 P 2x3 6 P 2x3 7 chassis (T) assy 2 Down the lever (IN SW). 3 PS 2x3 4 IN SW board 1 CN4 –...
  • Page 15: Lever (Release T)

    2-9. LEVER (RELEASE T) 4 claws 2 guide (disc) 5 lever (release T) 3 tension spring 1 claws 2-10. SERVO BOARD 4 PS 2x4 3 PS 2x4 2 CN2 1 CN3 5 SERVO board 6 P 2x3 7 loading motor assy –...
  • Page 16: Roller Assy

    2-11. ROLLER ASSY Note: Positions the arm (roller) and washer as shown in the Fig. 1. washer washer washer 3 cotter polyethylene washer Fig.1 5 roller assy 6 PS 2x3 4 arm (roller) 2 compression spring (RA-C) 7 LOAD SW board 1 tension spring (RA-E) 2-12.
  • Page 17: Optical Pick-Up Block

    2-13. OPTICAL PICK-UP BLOCK 1 P 2x3 2 sled motor assy 3 optical pick-up block – 17 –...
  • Page 18: Assembly Of Tape Mechanism

    SECTION 3 ASSEMBLY OF TAPE MECHANISM Note : Follow the assembly procedure in the numerical order given. ALIGNMENT OF ROTARY SWITCH 1 Align Δ mark on the rotary switch the position shown in the figure. hole chassis (S) assy 2 Align hole in the gear (LDG-D) with the position shown in the figure.
  • Page 19: Chassis (S) Assy

    CHASSIS (S) ASSY 3 screw (PS 2x4) 2 screw (PS 2x4) 1 chassis (S) assy LEVER (MODE) 1. Align ¢ mark on the rotary switch with hole in the lever (mode). 2. Fit on positions A , B and C and install the lever (mode).
  • Page 20: Lever (Pinch Selection)

    LEVER (PINCH SELECTION) 1 Align. 2 lever (pinch selection) HEAD PLATE ASSY 6 step screw (HP) 5 step screw (HP) head plate sub assy 2 Fit shaft in groove. 3 Press the ATS lever. 4 Position the head plate sub assy as shown in the figure.
  • Page 21: Lever (Pinch) Assy

    LEVER (PINCH) ASSY 3 polyethylene washer 6 polyethylene washer 1 Fit shaft on the lever (pinch) assy in hole on the chassis (M) assy and install the lever (pinch) assy. 2 claw 5 claw shaft 4 Fit shaft on the lever (pinch) assy in hole on the chassis (M) assy and install the lever (pinch) assy.
  • Page 22: Arm (Suction)

    ARM (SUCTION) 2 Move the arm (suction) in the arrow direction and fit on projection. projection 1 Fit the arm (suction) on the shaft. shaft D LEVER (LDG-A) / (LDG-B) shaft E shaft A shaft A shaft B shaft C shaft C 1 Fit the lever (LDG-A) on 3 two type-E stop ring 2.0...
  • Page 23: Gear (Ldg-Ft)

    GEAR (LDG-FT) 6 polyethylene washer 1 gear (LDG-A) 5 gear (LDG-FT) 2 tension spring (lever LDG) gear (LDG-D) hole gear (LDG-FB) 3 Move the lever (LDG-B) in the arrow direction. lever (LDG-A) gear (LDG-FB) 4 Align hole in the gear (LDG-D) with Δ...
  • Page 24: Mechanical Adjustments

    SECTION 4 SECTION 5 MECHANICAL ADJUSTMENTS ELECTRICAL ADJUSTMENTS PRECAUTION See the adjustment location from on page 27 for the 1. Wipe the following components with an absorbent cotton cloth adjustment. moistened with alcohol before adjustment : PB head Pinch roller TAPE SECTION 0 dB = 0.775 V Idler...
  • Page 25: Tuner Section

    TUNER SECTION 0 dB = 1 µV FM Auto Scan/Stop Level Adjustment Setting : D-BASS switch : OFF Cautions during repair TUNER button : FM When the tuner unit is defective, replace it by a new one because FREQUENCY SELECT switch (UK, E model) : FM 200K its internal block is difficult to repair.
  • Page 26 FM Stereo Separation Adjustment AM Auto Scan/Stop Level Adjustment Setting : Note : This adjustment should be performed after the FM Auto D-BASS switch : OFF Scan / Stop Level Adjustment is done. TUNER button : FM FREQUENCY SELECT switch (UK, E model) : FM 200K Setting : D-BASS switch : OFF...
  • Page 27 Adjustment Location : – set upper view – TAPE SPEED ADJ RV1 AM AUTO SCAN/STOP LEVEL ADJ RV2 FM AUTO SCAN/STOP LEVEL ADJ RV4 FM STEREO SEPARATION ADJ RV200 RV100 (R-CH) (L-CH) DOLBY LEVEL ADJ – set lower view – R-CH TP (DOLBY) DOLBY LEVEL ADJ...
  • Page 28: Cd Section

    CD SECTION Focus Gain Adjustment (Coarse adjustment) This adjustment is not required unless the following parts are replaced: Note : • Optical pick-up 1. CD Block basically constructed to operate without adjustment. • Therefore, check each item in order given. 2.
  • Page 32: Circuit Boards Location

    WX-C570 6-4. CIRCUIT BOARDS LOCATION SENSOR board IN SW board LIMIT SW board LOAD SW board SERVO board CONTROL board SUB board CD board tuner unit (TUX-006/2 (E)) REEL SENSOR board MAIN board – 35 –...
  • Page 33 WX-C570 • Waveforms (MODE:PLAY) Approx. 620mVp-p (FEO) 1.2Vp-p #¡ (RFO) Approx. 200mVp-p $™ (TEO) 2.6Vp-p 7.6μsec (MDP) 5.8Vp-p 22.7μsec @º (LRCK) 5.7Vp-p 474nsec @™ (BCK) 3.2Vp-p 16.89MHz #¢ (XTAI) Note: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
  • Page 34: Ic Block Diagrams

    • IC Block Diagrams IC1 CXD2507AQ (SERVO BOARD) IC801 PCM1717E DGND CONTROL CLKO SERVO AUTO SEQUENCER DATA LRCIN ML/MUTE INPUT XRST INTERFACE MODE MC/DM1 SENS CONT SUB CODE MUTE BCKIN MD/DM0 PROCESSOR INTERFACE DIGITAL SQCK DIGITAL FILTER RSTB ZERO LOCK SQSO TEST EXCK...
  • Page 35 IC2 CXA1782BQ (SERVO BOARD) 27 26 25 LEVEL S MIRR SENS RF IV AMP1 DFCT C.OUT XRST RF IV AMP2 FE BIAS IIL DATA REGISTER INPUT SHIFT REGISTER DATA ADDRESS DECODER OUTPUT DECODER TOG1-3 FS1-4 TG1-2 TM1-7 PS1-4 F IV AMP BAL1-3 FZC COMP E IV AMP...
  • Page 36 IC1 BU2624FV (MAIN BOARD) IC101-104, 201 µPC4558G2 A OUT XOUT B OUT – PHASE A IN– + – A IN+ B IN– REFERENCE DIVIDER B IN+ FMIN MAIN PRESCALER COUNT IC300 M62008FP SHIFT REGISTER LATCH AMIN IF COUNT INTERRUPT SIGNAL –...
  • Page 37 IC302 LC75373ED – LFIN – – – LFOUT – LSELO LROUT – – – VREF SHIFT DECODER LATCH CONTROL REGISTER – – – RROUT RSELO – RFOUT – – – – RFIN 6 7 8 9 10 IC901 HA13157 IC802 SM5852FS INPUT BUFFER 1 STBY GND1...
  • Page 38: Ic Pin Descriptions

    Music with/without detection input at AMS. PLAY/AMS TAPE AMS control output FWD/REV detection output METAL control output BUS-SI Serial data input (for SONY BUS) BUS-SO Serial data output (for SONY BUS) BUS-CKI Serial clock input (for SONY BUS) BUS-CKO Serial clock output (for SONY BUS)
  • Page 39 Pin No. Pin Name Pin Description SYS-RST System reset control output BUS-ON BUS ON control output (for SONY BUS) 56, 57 RE1, 0 Rotary encoder input AD-ON Power control output for A/D conversion. RAMBU RAM reset detection input RESET –...
  • Page 40 Serial clock output for display driver. FL BLK Blank control output for display driver. Not used. (Connect to GND.) UNISI Serial data input (for SONY BUS) UNISO Serial data output (for SONY BUS) UNICKI Serial clock input (for SONY BUS)
  • Page 41 Pin No. Pin Name Pin Description Disc detection sensor input CTL1 Driver IC control output 1 TAPEIND TAPE IN LED drive output CDIND CD IN LED drive output BASIND D-BASS LED drive output – Reset input SCOR SCOR signal detection input CNIN Track jump number count input SELFSW...
  • Page 42: Exploded Views

    SECTION 7 EXPLODED VIEWS NOTE: • The mechanical parts with no reference • -XX and -X mean standardized parts, so • Accessories and packing materials and number in the exploded views are not supplied. they may have some difference from the hardware (# mark) list are given in •...
  • Page 43: Front Panel Section

    Part No. Description Remark 3-012-482-11 PLATE, TRANSPARENT 3-012-505-01 KNOB (D-BASS) 3-012-497-01 SHEET, INDICATION 3-012-484-01 BUTTON (CD EJECT) 3-736-833-11 EMBLEM (NO.3), SONY 3-012-489-01 BUTTON (6 KEY) 3-012-487-11 BUTTON (TUNE) 3-012-503-01 PLATE, LIGHT INTERCEPTION 3-012-486-11 BUTTON (TAPE) 3-012-522-01 BUTTON (SOUND) 3-012-485-11 BUTTON (CD)
  • Page 44: Chassis Section

    7-3. CHASSIS SECTION MG-52A-135 MG-338X-121 F901 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 101 X-3373-616-1 CHASSIS ASSY * 108 3-012-511-01 BRACKET (2F) * 102 3-012-514-01 SHEET, INSULATING * 109 3-012-509-01 BRACKET (1F) * 103 A-3313-239-A MAIN BOARD, COMPLETE (US) 3-322-044-01 SPACER, RUBBER * 103...
  • Page 45: Cd Mechanism Section (1)

    7-4. CD MECHANISM SECTION (1) (MG-338X-121) not supplied M903 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-935-846-01 ARM (ROLLER) 3-906-924-01 SPRING, TENSION 3-937-562-01 SPRING (RA-C), COMPRESSION * 162 1-660-797-11 SENSOR BOARD 3-909-607-01 SCREW * 163 3-935-829-06 CHASSIS (T) 3-935-849-01 LEVER (IN SW) * 164...
  • Page 46: Cd Mechanism Section (2)

    7-5. CD MECHANISM SECTION (2) (MG-338X-121) not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-931-897-41 DAMPER (T) 3-931-894-01 BRACKET (CP) 3-931-897-31 DAMPER (T) * 211 3-913-404-11 RETAINER (DISC) A-3277-565-A CHASSIS (M) ASSY X-3372-203-1 ARM ASSY, CHUCKING 3-007-537-01 WHEEL (U), WORM 3-936-472-01 SPRING (LEFT), TORSION 3-931-882-02 GEAR (MDL)
  • Page 47: Cd Mechanism Section (3)

    7-6. CD MECHANISM SECTION (3) (MG-338X-121) M901 M902 The components identified by mark ! or dotted line with mark. ! are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark ! 251...
  • Page 48: Tape Mechanism Section (1)

    7-7. TAPE MECHANISM SECTION (1) (MG-52A-135) M904 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-017-302-01 BELT (25) * 308 3-012-502-01 GUIDE * 302 3-928-673-01 LEVER (LDG-A) 3-933-346-01 CATCHER 3-928-674-01 LEVER (LDG-B) 3-933-344-01 GUIDE (C) 3-933-341-01 SPRING (LEVER LDG), TENSION 3-341-753-11 WASHER, POLYETHYLENE 3-928-671-01 HOUSING 3-933-335-01 GEAR (LDG-FT)
  • Page 49: Tape Mechanism Section (2)

    7-8. TAPE MECHANISM SECTION (2) (MG-52A-135) HP901 S901 M905 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3371-710-6 CHASSIS (S) ASSY X-3371-713-2 LEVER (PINCH) ASSY 3-008-879-02 SPRING (B-T-R), CONE COIL X-3371-706-2 ARM (HANGER) ASSY 3-010-630-01 WASHER (TEFLON) 3-933-336-01 SPRING (ARM HANGER), TENSION 3-933-333-01 GEAR (LDG-E) * 370...
  • Page 50: Electrical Parts List

    SECTION 8 ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in • Items marked “*” are not stocked since The components identified by mark ! or dotted line with mark. ! are the parts list may be different from the they are seldom required for routine service.
  • Page 51 CONTROL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark JC451 1-216-296-00 CONDUCTOR, CHIP (3216) R424 1-216-238-00 METAL GLAZE 1/8W JC453 1-216-296-00 CONDUCTOR, CHIP (3216) R425 1-216-105-00 METAL GLAZE 220K 1/10W JC454 1-216-296-00 CONDUCTOR, CHIP (3216) R426 1-216-089-00 METAL GLAZE 1/10W JC455...
  • Page 52 CONTROL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < DIODE > < RESISTOR > D701 8-719-977-03 DIODE DTZ5.6B R701 1-216-041-00 METAL CHIP 1/10W D727 8-719-975-06 LED CL-70G-CD (CD WINDOW) R702 1-216-075-00 METAL CHIP 1/10W D728 8-719-975-06 LED CL-70G-CD (TAPE WINDOW) R703 1-216-075-00 METAL CHIP...
  • Page 53 IN SW LIMIT SW LOAD SW MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-660-798-11 IN SW BOARD 1-163-235-11 CERAMIC CHIP 22PF C100 1-163-022-00 CERAMIC CHIP 0.012uF ************ C101 1-163-023-00 CERAMIC CHIP 0.015uF < SWITCH > C102 1-163-989-11 CERAMIC CHIP 0.033uF...
  • Page 54 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C219 1-126-157-11 ELECT 10uF C526 1-126-157-11 ELECT 10uF C238 1-126-157-11 ELECT 10uF C527 1-126-157-11 ELECT 10uF C239 1-126-157-11 ELECT 10uF C528 1-163-251-11 CERAMIC CHIP 100PF C240 1-124-257-00 ELECT 2.2uF C529 1-164-232-11 CERAMIC CHIP...
  • Page 55 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark D101 8-719-404-49 DIODE MA111 IC201 8-759-100-96 IC uPC4558G2 D201 8-719-404-49 DIODE MA111 IC300 8-759-196-18 IC M62008FP-T1 D300 8-719-200-82 DIODE 11ES2 IC301 8-759-494-00 IC uPD78058GC-F35-3B9 D301 8-719-422-97 DIODE MA8091-M IC302 8-759-443-67 IC LC75373ED D302...
  • Page 56 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark Q505 8-729-424-08 TRANSISTOR UN2111 R124 1-216-071-00 METAL CHIP 8.2K 1/10W Q506 8-729-424-08 TRANSISTOR UN2111 R125 1-216-049-11 METAL GLAZE 1/10W Q507 8-729-421-22 TRANSISTOR UN2211 R126 1-216-049-11 METAL GLAZE 1/10W Q508 8-729-421-22 TRANSISTOR UN2211...
  • Page 57 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R304 1-216-065-00 METAL CHIP 4.7K 1/10W R542 1-216-097-00 METAL GLAZE 100K 1/10W R305 1-216-067-00 METAL CHIP 5.6K 1/10W R544 1-216-097-00 METAL GLAZE 100K 1/10W R306 1-216-049-11 METAL GLAZE 1/10W R545 1-216-097-00 METAL GLAZE...
  • Page 58 SENSOR SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-660-797-11 SENSOR BOARD 1-164-004-11 CERAMIC CHIP 0.1uF 1-126-204-11 ELECT CHIP 47uF ************** 1-164-004-11 CERAMIC CHIP 0.1uF < DIODE > < CONNECTOR > 8-719-045-75 LED CL-200IR-X-TU 8-719-045-75 LED CL-200IR-X-TU 1-764-616-12 HOUSING, CONNECTOR (PC BOARD) 30P 8-719-045-75 LED CL-200IR-X-TU 1-565-728-11 CONNECTOR, FPC 17P...
  • Page 59 SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark JR42 1-216-296-00 CONDUCTOR, CHIP (3216) 1-216-073-00 METAL CHIP 1/10W JR43 1-216-296-00 CONDUCTOR, CHIP (3216) 1-216-295-00 CONDUCTOR, CHIP (2012) JR44 1-216-296-00 CONDUCTOR, CHIP (3216) 1-216-101-00 METAL CHIP 150K 1/10W JR45 1-216-296-00 CONDUCTOR, CHIP...
  • Page 60 WX-C570 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark MISCELLANEOUS PARTS FOR INSTALLATION AND CONNECTIONS *************** ************************************** 1-776-207-11 CORD (WITH CONNECTOR) (POWER) X-3374-920-1 SCREW ASSY ! 251 8-848-402-02 PICK-UP, OPTICAL KSS-520A/J2NP 3-936-590-01 FRAME (N), ORNAMENT 1-659-881-11 PICK-UP FLEXIBLE BOARD...