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Sony XR-C7500RX Service Manual
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Sony XR-C7500RX Service Manual

Sony XR-C7500RX Service Manual

Fm/mw/lw cassette car stereo
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XR-C7500R/C7500RX
SERVICE MANUAL
(XR-C7500R/C7500RX: AEP, UK)
For RM-X4S (Remote Commander),
please refer to RM-X4S Service Manual
(9-925-698-S) previously issued.
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
"DOLBY" and the double-D symbol ; are trade-
marks of Dolby Laboratories Licensing Corporation.
Cassette player section
Cassette type
Dolby B NR
Tuner section
FM
MW/LW
Photo: XR-C7500R
SPECIFICATIONS
Power amplifier section
Dolby NR off
General
Design and specifications are subject to change
without notice.
FM/MW/LW CASSETTE CAR STEREO
Model Name Using Similar Mechanism XR-C7300/C5300R
Tape Transport Mechanism Type
AEP Model
UK Model
XR-C7500R/C7500RX
E Model
XR-C7500RX
MG-25G-136

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Summary of Contents for Sony XR-C7500RX

  • Page 1 Model Name Using Similar Mechanism XR-C7300/C5300R Tape Transport Mechanism Type SPECIFICATIONS Power amplifier section Dolby NR off General Design and specifications are subject to change without notice. FM/MW/LW CASSETTE CAR STEREO AEP Model UK Model XR-C7500R/C7500RX E Model XR-C7500RX MG-25G-136...

  • Page 2: Table Of Contents

    (within 3 times). • Be careful not to apply force on the conductor when soldering or unsoldering. MODEL IDENTIFICATION The XR-C7500R and XR-C7500RX have three types of MAIN boards respectively. – MAIN BOARD (Conductor Side) – TUX1 ... 12 ...

  • Page 3: General

    Be sure to press (OFF) on the unit for two seconds to turn off the clock display after turning off the engine. (OFF) (XR-C7500RX: E) The corresponding buttons of the card remote commander control the same functions as those on this unit.

  • Page 4: Installation

    Installation Instalación Precautions Precauciones Mounting angle adjustment Ajuste del ángulo de montaje How to detach and attach the Forma de extraer e instalar el front panel panel frontal Before installing the unit, detach the front Antes de instalar la unidad, extraiga el panel panel.
  • Page 5 Installation in the dashboard Instalación en el salpicadero 1 8 2 5 3 m Bend these claws outward for a tight fit, if necessary. Si es necesario, doble estas uñas hacia afuera para que encaje firmemente. För att få en tät passning böj dessa flikar vid behov.

  • Page 6: Connections

    Connections Conexiones Cautions Precauciones Conecte todos los cables de puesta a masa a Run all earth wires to a common earth point. un punto común. Warning when installing in a car Advertencia sobre la instalación en without ACC (accessory) position on un automóvil que no disponga de the ignition key switch posición ACC (accesorios) en el...
  • Page 7 (XR-C7500R/XR-C7500RX: AEP, UK) Connection example Ejemplo de conexiones Note for the aerial connecting Nota sobre la conexión de la antena If your car aerial is an ISO (International Si la antena del automóvil es del tipo ISO Organisation for Standardisation) type, use the (International Organization for Standardization), supplied adaptor 6 to connect it.
  • Page 8 (XR-C7500RX: E)
  • Page 9 Power connection diagram Diagrama de conexión de alimentación Auxiliary power connector Conector de alimentación auxiliar Yttre strömanslutning Conector de corrente auxiliar Rojo Rojo Röd Röd Vermelho Vermelho Yellow Yellow Amarillo Amarillo Amarelo Amarelo Connection diagram Diagrama de conexiones Equipment used in illustrations (not supplied) Equipo utilizado en las ilustraciones Front speaker...

  • Page 10: Disassembly

    SECTION 3 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. 1 screw (PTT2.6 SUB PANEL ASS’Y 2 cover 4 two claws 6 sub panel ass’y 3 screw (PTT2.6 5 flexible flat cable 3 four screws (CN580) (PTT2.6 4 claw 3 screw (PTT2.6 MECHANISM DECK (MG-25G-136)
  • Page 11 MAIN BOARD 3 rubber cap (25) 1 three screws (PTT2.6 2 three ground point screws 4 main board HEAT SINK (2P) 1 three screws (PTT2.6 2 two screws (PTT2.6 3 heat sink (2P) 1 three screws (PTT2.6...

  • Page 12: Assembly Of Mechanism Deck

    SECTION 4 ASSEMBLY OF MECHANISM DECK Note: Follow the assembly procedure in the numerical order given. HOUSING 7 Hold the hanger by bending the claw. 5 Fit projection on C part. 1 Install the catch to the hanger. 2 Install the hanger onto two claws of the housing.
  • Page 13 LEVER (LDG-A) / (LDG-B) shaft A shaft B 1 Fit the lever (LDG-A) on shafts A – C and install it. GEAR (LDG-FT) gear (LDG-D) hole hole lever (LDG-A) gear (LDG-FB) 4 Align hole in the gear (LDG-D) with hole the lever (LDG-A). 2 tension spring (LD-2) shaft C 3 type-E stop ring 2.0...
  • Page 14 GUIDE (C) MOUNTING POSITION OF CAPSTAN/REEL MOTOR (M901) 2 guide (C) 1 three claws two precision screws capstan/reel motor (M901) 30˚...

  • Page 15: Mechanical Adjustments

    SECTION 5 MECHANICAL ADJUSTMENTS 1. Clean the following parts with a denatured-alcohol-moistened swab: playback head pinch roller rubber belt capstan idler 2. Demagnetize the playback head with a head demagnetizer. 3. Do not use a magnetized screwdriver for the adjustments. 4.

  • Page 16: Tape Deck Section

    TAPE DECK SECTION 0 dB=0.775 V Tape Speed Adjustment Setting: speed checker frequency counter test tape WS-48A (3 kHz, 0 dB) 10 k LINE OUT REAR jack (CN13) Procedure: 1. Put the set into the FWD PB mode. 2. Adjust adjustment resistor for inside capstan motor so that the reading on the speed checker or frequency counter becomes in specification.

  • Page 17: Diagrams

    SECTION 7 DIAGRAMS 7-1. BLOCK DIAGRAM – TUNER/TAPE Section – FM/AM TUNER UNIT TUX1 (FM/AM ANTENNA) 2 FM-ANT AM-ANT TAPE EQUALIZER AMP, DOLBY NR AMP, AMS HP901 IC250 RV230 (PLAYBACK) DOLBY LEVEL (L) TAPE OUT1 L-CH EQ AMP MUTE R-CH R-CH R-CH R-CH...

  • Page 18: Block Diagram - Main Section

    XR-C7500R/C7500RX 7-2. BLOCK DIAGRAM – MAIN Section – DIGITAL SIGNAL PROCESSOR, DIGITAL FILTER, D/A CONVERTER IC100 35 LIN R-CH 46 RIN CN13 (1/2) INPUT SELECT, FM MPX AUDIO IN IC10 (1/2) R-CH LOUDNESS/ SOFT VOLUME MUTE FD1L– (Page 17) MUTE TAPE L (Page 17) AM-IF...

  • Page 19: Block Diagram - Display/Key Control Section

    S901 – 904 ROTARY ENCODER J520 RE901 REMOTE IN D580 48 72 116 115 CNP801 (XR-C7500R) CN801 (XR-C7500RX) MAIN BODY SIDE DSPDATA,DSPCKO (Page 18) X800 18.432MHz 61 63 33 LIQUID CRYSTAL DISPLAY DRIVE CONTROLLER IC800 (1/2) 64 66 100 99 98 SEG1 –...

  • Page 20: Block Diagram - Bus Control/Power Supply Section

    XR-C7500R/C7500RX 7-4. BLOCK DIAGRAM – BUS CONTROL/POWER SUPPLY Section – D501 SIRCS SIRCS BUFFER Q503 RESET SIGNAL B/U +5V GENERATOR IC560 S500 RESET SONY BUS INTERFACE IC500 RESET RESET SWITCH DATA DATA IN DATA DATA OUT CLK IN BUS ON/OFF SWITCH BUS ON Q502 ON IN...

  • Page 21: Note For Printed Wiring Boards And Schematic Diagrams

    7-5. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS Note on Printed Wiring Board: Note on Schematic Diagram: • X : parts extracted from the component side. • All capacitors are in µF unless otherwise noted. pF: µµF • Y : parts extracted from the conductor side. 50 WV or less are not indicated except for electrolytics •...

  • Page 22: Printed Wiring Board - Main Board (Component Side)

    XR-C7500R/C7500RX 7-6. PRINTED WIRING BOARD – MAIN Board (Component Side) – • Semiconductor Location (Component Side) Ref. No. Location Ref. No. Location G-10 IC201 I-13 IC250 H-11 D201 IC500 D500 IC560 D501 IC600 D502 IC800 D506 IC801 D507 D520 F-10 D522 E-13 D551...

  • Page 23: Printed Wiring Board - Main Board (Conductor Side)

    7-7. PRINTED WIRING BOARD – MAIN Board (Conductor Side) – (Page 28) XR-C7500R/C7500RX (EXCEPT C7500RX: E) RL– GRN/BLK • Semiconductor CN700 FL– WHT/BLK Location FR– GRY/BLK (Conductor Side) RR– VIO/BLK Ref. No. Location I-13 D170 WHT/BLK D202 D503 GRN/BLK D504 VIO/BLK D505 D508...

  • Page 24: Schematic Diagram – Main Board (1/4)

    XR-C7500R/C7500RX 7-8. SCHEMATIC DIAGRAM – MAIN Board (1/4) – • • See page 29 for Waveforms. See page 32 for IC Block Diagrams. (Page 25) (Page 27) (Page 26)

  • Page 25: Schematic Diagram – Main Board (2/4)

    XR-C7500R/C7500RX 7-9. SCHEMATIC DIAGRAM – MAIN Board (2/4) – • See page 29 for Waveforms. • See page 32 for IC Block Diagrams. (Page (Page (Page 27)

  • Page 26: Schematic Diagram - Main Board (1/4)

    XR-C7500R/C7500RX 7-10. SCHEMATIC DIAGRAM – MAIN Board (3/4) – • • See page 29 for Waveforms. See page 32 for IC Block Diagrams. (Page 24) (Page (Page...

  • Page 27: Schematic Diagram - Main Board (2/4)

    XR-C7500R/C7500RX 7-11. SCHEMATIC DIAGRAM – MAIN Board (4/4) – • See page 29 for Waveforms. • See page 32 for IC Block Diagrams. (Page 25) (Page 24) (Page (Page 28)

  • Page 28: Printed Wiring Board - Sub Board

    XR-C7500R/C7500RX 7-12. PRINTED WIRING BOARD – SUB Board – 7-13. SCHEMATIC DIAGRAM – SUB Board – (Page 31) (Page 27) (Page 23) (Page 30)
  • Page 29 • Waveforms – MAIN Board – 6 IC600 os (X0) 1 IC50 5 (OSCI) 4.5 Vp-p 2.6 Vp-p 231 ns 272 ns 2 IC100 ra (XTLI38) 7 IC800 ih (EXTAL) 980 mVp-p 980 mVp-p 59 ns 54.2 ns 3 IC100 ug (BCK) 4.3 Vp-p 352 ns 4 IC100 uh (LRCK)

  • Page 30: Printed Wiring Board - Key Board

    XR-C7500R/C7500RX 7-14. PRINTED WIRING BOARD – KEY Board – • Semiconductor Location (Component Side) Ref. No. Location IC951 LED901 LED902 LED903 LED904 LED910 B-12 LED911 B-12 LED912 A-12 LED913 LED914 LED915 • Semiconductor Location (Conductor Side) Ref. No. Location D901 B-13 D902 C-11...

  • Page 31: Schematic Diagram - Key Board

    XR-C7500R/C7500RX 7-15. SCHEMATIC DIAGRAM – KEY Board – • See page 29 for Waveforms. (Page...
  • Page 32 • IC Block Diagrams – MAIN Board – IC10 TDA7402TR 33 32 31 MIXER MONO- MONO- MONO- MONO- FADER FADER FADER FADER ACINLF FRONT SWINR ACIN OUTPUT SWINL REAR SELECTOR ACOUTR MAIN ACOUTL SECOND CREF VOICE BANDPASS BASS TREBLE HIGH-CUT VOLUME S&H SOFTMUTE...
  • Page 33 IC201 LB1930M-TLM BUFFER MOTOR CONTROL DRIVE CIRCUIT CIRCUIT BUFFER S-GND IC250 CXA2510AQ-T4 120 / – PBFB1 PBRIN1 PBREF1 PBFIN1 PBGND PBFIN2 PBREF2 PBRIN2 PBFB2 – + – 120 / OUT1 OUT2 P-GND + – MSMODE NR BIAS DRSW MODE TAPE/AUX TAPESW INSW TAPE EQ...

  • Page 34: Ic Pin Function Description

    7-16. IC PIN FUNCTION DESCRIPTION MAIN BOARD IC100 CXD2726Q-4 (DIGITAL SIGNAL PROCESSOR, DIGITAL FILTER, D/A CONVERTER) Pin No. Pin Name VSS1 — Ground terminal (digital system) 2 to 15 Input terminal for the test (fixed at “L”) 16 to 21 TST0 to TST5 Input terminal for the test (fixed at “L”) 22 to 24...
  • Page 35 Pin No. Pin Name Transfer enable signal output to the system controller (IC600) REDY “L”: transfer prohibition Serial data output to the system controller (IC600) and liquid crystal display drive controller TRDT (IC800) XLAT Serial data latch pulse input from the system controller (IC600) RVDT Serial data input from the system controller (IC600) Serial data 24/32 bit slot selection signal input terminal...
  • Page 36 MAIN BOARD IC600 MB90574BPMT-G-265-BND (SYSTEM CONTROLLER) Pin No. Pin Name Not used (open) Whether a music is present or not from CXA2510AQ (IC250) is detected at auto music sensor AMSIN “L”: music is present, “H”: music is not present Tape auto music sensor control signal output to the CXA2510AQ (IC250) AMSON “L”...
  • Page 37 Pin No. Pin Name DSPLAT Serial data latch pulse output to the CXD2726Q (IC100) DSPRST Reset signal output to the CXD2726Q (IC100) “L”: reset Not used (open) DVCC — Power supply terminal (+5V) (for D/A converter) DVSS — Ground terminal (for D/A converter) 40, 41 Not used (open) AVCC...
  • Page 38 “L”: line driver is not mounted, “H”: line driver is mounted Setting terminal for the illumination color COL SEL “L”: 2 color (XR-C7500R), “H”: 1 color (XR-C7500RX) AMPATT Power amplifier muting on/off control signal output terminal “H”: muting on BOOT...
  • Page 39 Pin No. Pin Name Setting terminal for the internal mechanism CD or MD CD MD “L”: CD, “H”: MD (fixed at “L” in this set) Not used (fixed at “L”) Tuner system power supply on/off control signal output terminal TUNON “H”: tuner power on Not used (open) Dial pulse input of the rotary encoder (RE901) (A phase input)

  • Page 40: Exploded Views

    NOTE: • -XX and -X mean standardized parts, so they may have some difference from the original one. • Color Indication of Appearance Parts Example: KNOB, BALANCE (WHITE) . . . (RED) Parts Color Cabinet's Color (1) GENERAL SECTION MG-25G-136 supplied Front panel section...
  • Page 41 (2) FRONT PANEL SECTION Ref. No. Part No. Description 3-041-004-01 BUTTON (1-6/D) (o MODE. 1. 2. 3. 4. 5. 6) 3-040-987-02 BUTTON (OFF) 3-040-986-01 BUTTON (MENU/SOUND) 3-041-003-01 BUTTON (LIST/ENTER) (DSPL. LIST. ENTER) 3-040-980-01 BUTTON (SOURCE) 3-042-458-01 KNOB (VOL-DSO) * 59 3-040-997-01 PLATE (LCD), GROUND 1-694-660-11 CONDUCTIVE BOARD, CONNECTION * 61...
  • Page 42 (3) MECHANISM DECK SECTION (MG-25G-136) Ref. No. Part No. Description A-3291-667-A CLUTCH (FR) ASSY * 152 3-019-130-01 LEVER (LDG-A) * 153 3-019-131-01 LEVER (LDG-B) 3-020-539-01 SPRING (LD-1), TENSION 3-020-540-01 SPRING (LD-2), TENSION 3-020-542-01 GEAR (LOADING FT) 3-341-753-11 WASHER, POLYETHYLENE 3-020-533-01 HOUSING * 159 3-020-532-01 ARM (SUCTION) 3-020-534-01 HANGER...

  • Page 43: Electrical Parts List

    NOTE: • Due to standardization, replacements in the parts list may be different from the parts speci- fied in the diagrams or the components used on the set. • -XX and -X mean standardized parts, so they may have some difference from the original one.
  • Page 44 Ref. No. Part No. Description LSW908 1-771-610-11 SWITCH, TACTILE (WITH LED) (o MODE) LSW908 1-771-883-11 SWITCH, TACTILE (WITH LED) (o MODE) LSW909 1-762-737-11 SWITCH, KEYBOARD (LED) (DSO) LSW910 1-762-620-21 SWITCH, KEY BOARD (WITH LED) (TA) LSW910 1-771-476-11 SWITCH, KEY BOARD (WITH LED) (TA) LSW911 1-762-620-21 SWITCH, KEY BOARD (WITH LED) (AF) LSW911 1-771-476-11 SWITCH, KEY BOARD (WITH LED) (AF) LSW912 1-771-610-11 SWITCH, TACTILE (WITH LED) (6) (C7500R)
  • Page 45 Ref. No. Part No. Description < SWITCH > S901 1-771-884-11 SWITCH, TACTILE (WITH LED) S902 1-771-884-11 SWITCH, TACTILE (WITH LED) S903 1-771-884-11 SWITCH, TACTILE (WITH LED) S904 1-771-884-11 SWITCH, TACTILE (WITH LED) ************************************************************** A-3326-274-A MAIN BOARD, COMPLETE (C7500R: TYPE A) A-3326-278-A MAIN BOARD, COMPLETE (C7500R: TYPE B) A-3326-280-A MAIN BOARD, COMPLETE (C7500R: TYPE C) A-3326-284-A MAIN BOARD, COMPLETE (C7500RX: TYPE A)
  • Page 46 MAIN Ref. No. Part No. Description C171 1-164-004-11 CERAMIC CHIP C172 1-131-353-00 TANTALUM C174 1-131-353-00 TANTALUM C201 1-124-234-00 ELECT C204 1-117-370-11 CERAMIC CHIP C205 1-164-004-11 CERAMIC CHIP C206 1-164-004-11 CERAMIC CHIP C207 1-164-222-11 CERAMIC CHIP C210 1-126-934-11 ELECT C230 1-163-227-11 CERAMIC CHIP C231 1-162-915-11 CERAMIC CHIP C232...
  • Page 47 Ref. No. Part No. Description C613 1-163-235-11 CERAMIC CHIP C614 1-163-235-11 CERAMIC CHIP C616 1-162-968-11 CERAMIC CHIP C617 1-164-004-11 CERAMIC CHIP C620 1-164-004-11 CERAMIC CHIP C650 1-107-826-11 CERAMIC CHIP C661 1-165-176-11 CERAMIC CHIP C701 1-126-933-11 ELECT C703 1-124-233-11 ELECT C704 1-164-004-11 CERAMIC CHIP C705 1-164-004-11 CERAMIC CHIP...
  • Page 48 MAIN Ref. No. Part No. Description FB103 1-469-152-11 FERRITE FB104 1-469-152-11 FERRITE FB601 1-469-152-11 FERRITE FB602 1-469-152-11 FERRITE FB603 1-469-152-11 FERRITE FB604 1-469-152-11 FERRITE FB605 1-469-152-11 FERRITE < IC > IC10 8-759-653-27 IC TDA7402TR IC41 8-759-909-71 IC BA4558F IC50 8-759-650-68 IC SAA6588T/V2-118 IC90 8-759-909-71 IC BA4558F IC100...
  • Page 49 Ref. No. Part No. Description 1-216-809-11 METAL CHIP 1-216-298-00 METAL CHIP 1-216-001-00 METAL CHIP 1-216-295-00 SHORT 1-216-001-00 METAL CHIP 1-216-113-00 METAL CHIP 1-216-821-11 METAL CHIP 1-216-061-11 METAL CHIP 1-216-817-11 METAL CHIP 1-216-809-11 METAL CHIP 1-216-809-11 METAL CHIP 1-216-001-00 METAL CHIP 1-216-845-11 METAL CHIP 1-216-845-11 METAL CHIP 1-216-821-11 METAL CHIP...
  • Page 50 MAIN Ref. No. Part No. Description R431 1-216-845-11 METAL CHIP R432 1-216-835-11 METAL CHIP R433 1-216-864-11 METAL CHIP R434 1-216-025-00 RES-CHIP R435 1-216-081-00 METAL CHIP R437 1-216-837-11 METAL CHIP R439 1-216-821-11 METAL CHIP R451 1-216-057-00 METAL CHIP R452 1-216-825-11 METAL CHIP R460 1-216-833-11 RES-CHIP R461...
  • Page 51 Ref. No. Part No. Description R661 1-216-089-00 RES-CHIP R662 1-216-085-00 METAL CHIP R663 1-216-857-11 METAL CHIP R664 1-216-809-11 METAL CHIP R671 1-216-809-11 METAL CHIP R672 1-216-809-11 METAL CHIP R673 1-216-821-11 METAL CHIP R674 1-216-821-11 METAL CHIP R675 1-216-295-00 SHORT R676 1-216-097-00 RES-CHIP R690 1-216-833-11 RES-CHIP...
  • Page 52 XR-C7500R/C7500RX Ref. No. Part No. Description ************** HARDWARE LIST ************** 7-685-793-09 SCREW +PTT 2.6X8 (S) 7-621-772-20 SCREW +B 2X5 7-685-792-09 SCREW +PTT 2.6X6 (S) 7-627-553-28 SCREW, PRECISION +P 2X2.5 7-685-647-79 SCREW +BVTP 3X10 TYPE2 N-S 7-624-104-04 STOP RING 2.0, TYPE-E 7-627-553-17 PRECISION SCREW +P 2X2 TYPE 3 7-685-106-19 SCREW +P 2X10 TYPE2 NON-SLIT 7-685-795-09 SCREW +PTT 2.6X12 (S)

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