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Sony XR-C7220R Service Manual

Fm/mw/lw cassette car stereo
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SERVICE MANUAL
For RM-X4S (Remote Commander),
please refer to RM-X4S Service Manual
(9-925-698-∏) previously issued.
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
"DOLBY" and the double-D symbol a are trade-
marks of Dolby Laboratories Licensing Corporation.
MICROFILM
XR-C7220R
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
SPECIFICATIONS
FM/MW/LW CASSETTE CAR STEREO
AEP Model
UK Model
XR-C8100R
MG-25D-136

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  • Page 1 XR-C7220R SERVICE MANUAL AEP Model UK Model For RM-X4S (Remote Commander), please refer to RM-X4S Service Manual (9-925-698-∏) previously issued. Dolby noise reduction manufactured under license Model Name Using Similar Mechanism XR-C8100R from Dolby Laboratories Licensing Corporation. Tape Transport Mechanism Type MG-25D-136 “DOLBY”...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Flexible Circuit Board Repairing • Keep the temperature of the soldering iron around 270 ˚C dur- ing repairing. GENERAL • Do not touch the soldering iron on the same conductor of the Location of controls ............3 circuit board (within 3 times).
  • Page 3 SECTION 1 This section is extracted from instruction manual. GENERAL – 3 –...
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  • Page 12: Disassembly

    SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. 1 connector (CN802) SUB PANEL ASS’Y 3 two claws 2 three screws (PTT2.6 × 6) 3 claw 4 connector (CN500) 5 sub panel ass’y 2 screw (PTT2.6 × 6) MECHANISM DECK (MG-25D-136) 3 two screws (2.6 ×...
  • Page 13 MAIN BOARD, HEAT SINK 6 inverter ass’y 5 screw (PTT2.6 × 10) 3 screw (PTT2.6 × 10) 9 seven screws (PTT2.6 × 10) 1 connector 8 cord (with connector) (CN553) (ANT) 1 connector (J10) 2 three ground point 7 screw screws (PTT2.6 ×...

  • Page 14: Assembly Of Mechanism Deck

    SECTION 3 ASSEMBLY OF MECHANISM DECK Note: Follow the assembly procedure in the numerical order given. 7 Holder the hanger by bending the claw. HOUSING 5 Fit projection on C part. 1 Install the catch to the hanger. 2 Install the hanger onto two claws of the housing.
  • Page 15 LEVER (LDG-A)/(LDG-B) shaft A shaft A shaft B shaft C shaft B 1 Fit the lever (LDG-A) on shafts A – C and install it. 3 type-E stop ring 2.0 2 Fit the lever (LDG-B) on shafts A and B and install it.
  • Page 16 GUIDE (C) 2 guide (C) 1 three claws MOUNTING POSITION OF CAPSTAN/REEL MOTOR (M901) two precision screws (P2 × 2) capstan/reel motor (M901) 30˚ – 16 –...

  • Page 17: Mechanical Adjustments

    SECTION 4 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 18: Electrical Adjustments

    SECTION 5 ELECTRICAL ADJUSTMENTS TEST MODE See the adjustment location from on page 22 for the This set have the test mode function. In the test mode, FM Auto adjustment. Scan/Stop Level and MW Auto Scan/Stop Level adjustments can be performed easier than it in ordinary procedure. TAPE DECK SECTION 0 dB=0.775 V <Set the Test Mode>...

  • Page 19: Tuner Section

    FM Stereo Separation Adjustment (Wide) TUNER SECTION 0 dB=1 µV Setting: [SOURCE] button : FM Cautions during repair [SHIFT] button : ON (light up SET UP and When the tuner unit is defective, replace it by a new one be- PLAY MODE) cause its internal block is difficult to repair.
  • Page 20 FM Stereo Separation Adjustment (Narrow) FM RDS S-Meter Adjustment Setting: Setting: [SOURCE] [SOURCE] button : FM button: FM [SHIFT] button : ON (light up SET UP and FM RF signal PLAY MODE) generator Preset (PLAY MODE) antenna jack (n) buttons : NARROW mode 0.01 µ...
  • Page 21 MW Auto Scan/Stop Level Adjustment Setting: [SOURCE] [MODE] buttons : MW 30 Ω 15 pF 65 pF AM RF signal generator AM dummy antenna (50 Ω ) antenna jack Carrier frequency : 999 kHz 30% amplitude modulation by 1 kHz signal : 33 dB (44.7 µ...
  • Page 22 Adjustment Location: – SET UPPER VIEW – Tape Speed Adjustment TUX10 RV1 MW Auto Scan/Stop Level Adjustment RV2 FM Auto Scan/Stop Level Adjustment RV3 FM Stereo Separation Adjustment (Wide) RV4 FM Stereo Separation Adjustment (Narrow) RV10 FM RDS S-Meter Adjustment RV240 RV230 (R-CH)

  • Page 23: Diagrams

    XR-C7220R SECTION 6 DIAGRAMS FM B+ AM B+ 6-1. BLOCK DIAGRAM – TUNER/TAPE Section – FM/AM TUNER UNIT TUX10 BAND-PASS FM-L (Page 25) FM L-OUT FILTER IC50 (FM/AM ANTENNA) FM-ANT FM R-OUT R-CH MUTING R-CH AM-ANT (Page 25) AM-DET FM-DET...

  • Page 24: Block Diagram - Main Section

    XR-C7220R 6-2. BLOCK DIAGRAM – MAIN Section – • SIGNAL PATH CN780 (1/2) : FM AUDIO IN : AM (MW/LW) INPUT SELECT, : TAPE PLAY ELECTRICAL VOLUME IC301 : BUS AUDIO IN R-CH CN780 (2/2) AUX-IN-L FM-L FNTO1 FM-IN-L VOLUME...

  • Page 25: Block Diagram - Display/Key Control Section

    XR-C7220R 6-3. BLOCK DIAGRAM – DISPLAY/KEY CONTROL Section – RE900 VOLUME/BASS/TREBLE/ BALANCE/FADER CONTROL LED800 LSW900 – 910, (TAPE WINDOW) D510 LSW912 – 918, LED802 S900, SW801 ROTARY ENCODER J500 RE900 REMOTE IN LED800, 802 D506 LED DRIVE BUZZER SW500 BZ600...

  • Page 26: Block Diagram - Bus Control/Power Supply Section

    FM+B (FM CIRCUIT B+) REMOTE CONTROL CN600 REGULATOR RECEIVER BUS CONTROL IN IC502 IC901 AM B+ AM+B (FOR SONY BUS) (AM CIRCUIT B+) D604 SIRCS BUFFER COM +8V SIRCS 24 SIRCS COM8V Q602 (AUDIO CIRCUIT B+) SONY BUS INTERFACE IC602...

  • Page 27: Note For Printed Wiring Boards And Schematic Diagrams

    XR-C7220R 6-5. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS • Waveforms – MAIN Board – – KEY Board – 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 1 IC10 @º...

  • Page 28: Printed Wiring Board - Main Board (Component Side)

    XR-C7220R 6-6. PRINTED WIRING BOARD – MAIN Board – (Component Side) • Semiconductor Location (Component Side) Ref. No. Location Ref. No. Location F-13 IC201 D200 IC250 H-11 D201 IC301 D202 IC302 F-10 D506 J-12 IC500 D508 IC600 D509 B-10 IC602...

  • Page 29: Printed Wiring Board - Main Board (Conductor Side)

    XR-C7220R 6-7. PRINTED WIRING BOARD – MAIN Board – (Conductor Side) • Semiconductor Location (Conductor Side) Ref. No. Location E-10 E-10 J-12 D501 D502 D503 K-10 D504 D507 D512 J-12 D515 J-12 D516 J-12 D518 J-12 D520 J-12 D521 K-10...
  • Page 30 XR-C7220R 6-8. SCHEMATIC DIAGRAM – MAIN Board (1/4) – • See page 32 for Waveforms. • See page 51 for IC Block Diagrams. (Page 39) (Page 43) (Page 41) – 38 – – 37 –...
  • Page 31 XR-C7220R 6-9. SCHEMATIC DIAGRAM – MAIN Board (2/4) – • See page 52 for IC Block Diagrams. (Page (Page (Page 43) – 39 – – 40 –...
  • Page 32 XR-C7220R 6-10. SCHEMATIC DIAGRAM – MAIN Board (3/4) – • See page 32 for Waveforms. • See page 51 for IC Block Diagrams. (Page 37) (Page (Page – 41 – – 42 –...

  • Page 33: Schematic Diagram - Main Board (1/4)

    XR-C7220R 6-11. SCHEMATIC DIAGRAM – MAIN Board (4/4) – • See page 53 for IC Block Diagrams. (Page 40) (Page 38) (Page 50) (Page (Page 50) (Page 50) (Page 50) – 43 – – 44 –...

  • Page 34: Printed Wiring Board - Key Board

    XR-C7220R 6-12. PRINTED WIRING BOARD – KEY Board – • Semiconductor Location (Component Side) Ref. No. Location IC901 LED900 LED901 LED902 LED903 LED904 LED905 LED906 LED907 • Semiconductor Location (Conductor Side) Ref. No. Location D901 D903 B-10 IC900 Q900 B-11...

  • Page 35: Schematic Diagram - Key Board

    XR-C7220R 6-13. SCHEMATIC DIAGRAM – KEY Board – • See page 32 for Waveforms. (Page 50) – 48 – – 47 –...

  • Page 36: Printed Wiring Board - Sub/Inverter Board

    XR-C7220R 6-14. PRINTED WIRING BOARD – SUB/INVERTER Board – 6-15. SCHEMATIC DIAGRAM – SUB/INVERTER Board – • See page 32 for Waveform. (Page 36) (Page 46) (Page 44) (Page 47) (Page 44) (Page 35) (Page 44) (Page 44) (Page 36) –...
  • Page 37 • IC Block Diagrams – MAIN Board – IC10 BU2624FV-E2 XOUT PHASE REFERENCE DIVIDER MAIN FMIN PRESCALER COUNT SHIFT REGISTER LATCH AMIN IF COUNT 20BIT COUNT IFIN IC150 SAA6588T-118 IC201 LB1638M POWER SUPPLY PAUSE N.C. & RESET DETECTOR MULTI PATH 57kHz DETECTOR 8th ORDER...
  • Page 38 IC250 CXA2510AQ-T4 120µ/ 70µ + – MSMODE – NR BIAS PBFB1 DRSW MODE PBRIN1 TAPE/AUX TAPESW PBREF1 INSW TAPE EQ PBFIN1 NRSW MODE FWD/RVS PBGND MS ON/ DETECT – PBFIN2 MSOUT PBREF2 DGND PBRIN2 PBFB2 MSTC OFF/B 120µ/ 70µ 8 9 10 IC301 CXA1946BQ-T6 35 34 30 29 28 27 26...
  • Page 39 IC502 BA3918-V3 IC602 BA8270F-E2 BUS ON BUS ON SWITCH REGULATOR RESET SWITCH BUS ON CLK IN BATTERY BATT BU IN SWITCH OVER VOLTAGE PROTECT VREF – DATA IN DATA DATA OUT 2 3 4 – 53 –...

  • Page 40: Ic Pin Function Description

    CSV-RST Reset signal output to the CSV “L”: reset Not used (open) BUS-ON Bus on/off control signal output to the SONY bus interface (IC602) “L”: bus on SYSRST Reset signal output to the SONY bus interface (IC602) “L”: reset DOORSW Front panel open/close detection signal input “L”...
  • Page 41 Pin No. Pin Name Function LCD INH Blank indicate control signal output to the liquid crystal display driver (IC900) “L”: no display — Ground terminal — Connected to coupling capacitor for the power supply A/D converter power control signal output terminal When the KEYACK (pin &§) that controls reference voltage power for key A/D conversion input AD-ON is active, “L”...
  • Page 42 Input of acknowledge signal for the key entry Acknowledge signal is input to accept function KEYACK and eject keys in the power off status On at input of “H” Battery detect signal input from the SONY bus interface (IC602) and battery detect circuit BU-IN “L” is input at low voltage...
  • Page 43 Pin No. Pin Name Function Motor drive signal output to the loading/tape operation motor drive (IC201) “H” active LM-LOD (For the loading direction and forward side operation) *1 CM-ON Capstan/reel motor (M901) drive signal output terminal “H”: motor on TAPEON Tape system power supply on/off control signal output terminal “H”: tape on Forward/reverse direction control signal output to the CXA2510AQ (IC250) N-ROUT...

  • Page 44: Exploded Views

    SECTION 7 EXPLODED VIEWS NOTE: • Items marked “*” are not stocked since they • -XX and -X mean standardized parts, so they may have some difference from the original are seldom required for routine service. Some one. delay should be anticipated when ordering these items.
  • Page 45 (2) FRONT PANEL SECTION not supplied (KEY board) not supplied EL900 LCD900 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3377-533-1 PANEL SUB ASSY, FRONT 3-022-308-01 BUTTON (PTY. AF/TA) 3-022-332-01 BUTTON (10 KEY) * 63 3-022-327-01 PLATE (LCD), GROUND (SHIFT.
  • Page 46 (3) MECHANISM DECK SECTION (MG-25D-136) HP901 M901 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-3291-667-A CLUTCH (FR) ASSY 3-933-346-01 CATCHER * 152 3-019-130-01 LEVER (LDG-A) 3-933-344-01 GUIDE (C) * 153 3-019-131-01 LEVER (LDG-B) 3-014-798-01 SCREW (HEAD), SPECIAL 3-020-539-01 SPRING (LD-1), TENSION 3-364-151-01 WASHER 3-020-540-01 SPRING (LD-2), TENSION...

  • Page 47: Electrical Parts List

    SECTION 8 INVERTER ELECTRICAL PARTS LIST NOTE: When indicating parts by reference • Due to standardization, replacements in the • Items marked “*” are not stocked since they number, please include the board. parts list may be different from the parts speci- are seldom required for routine service.
  • Page 48 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark IC901 8-749-012-25 IC RS-170-TU R916 1-216-053-00 METAL CHIP 1.5K 1/10W < LIQUID CRYSTAL DISPLAY > R917 1-216-057-00 METAL CHIP 2.2K 1/10W R918 1-216-061-00 METAL CHIP 3.3K 1/10W LCD900 1-803-504-11 DISPLAY PANEL, LIQUID CRYSTAL R919 1-216-065-00 RES,CHIP...
  • Page 49 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < CAPACITOR > C158 1-164-161-11 CERAMIC CHIP 0.0022uF 10% 100V C159 1-163-135-00 CERAMIC CHIP 560PF 1-163-235-11 CERAMIC CHIP 22PF 1-104-665-11 ELECT 100uF C160 1-164-505-11 CERAMIC CHIP 2.2uF 1-163-809-11 CERAMIC CHIP 0.047uF C161...
  • Page 50 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C407 1-126-157-11 ELECT 10uF C712 1-104-942-11 ELECT C408 1-164-161-11 CERAMIC CHIP 0.0022uF 10% 100V C713 1-126-157-11 ELECT 10uF C409 1-126-159-11 ELECT 0.47uF C410 1-126-157-11 ELECT 10uF C714 1-126-572-11 ELECT 4.7uF C432...
  • Page 51 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark D521 8-719-422-64 DIODE MA8062-M D522 8-719-422-64 DIODE MA8062-M IC500 8-759-443-72 IC RH5VL43AA-T1 D523 8-719-404-50 DIODE MA111-TX IC501 8-759-495-76 IC RN5VD33AA-TL D524 8-719-040-04 DIODE MA721WK-(TX) IC502 8-759-347-50 IC BA3918-V3 D525 8-719-404-50 DIODE MA111-TX IC503...
  • Page 52 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark Q440 8-729-420-68 TRANSISTOR 2SD1328-R-TX 1-216-069-00 METAL CHIP 6.8K 1/10W Q501 8-729-020-67 TRANSISTOR XN1A312-TX 1-216-073-00 METAL CHIP 1/10W Q502 8-729-020-67 TRANSISTOR XN1A312-TX 1-216-071-00 METAL CHIP 8.2K 1/10W Q503 8-729-424-59 TRANSISTOR UN2212 (AEP, UK, South European) Q504...
  • Page 53 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R307 1-216-809-11 METAL CHIP 1/16W R523 1-216-025-00 RES,CHIP 1/10W R333 1-216-033-00 METAL CHIP 1/10W R524 1-216-025-00 RES,CHIP 1/10W R334 1-216-081-00 METAL CHIP 1/10W R335 1-216-049-11 RES,CHIP 1/10W R530 1-216-675-11 METAL CHIP 0.5%...
  • Page 54 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R702 1-216-206-00 RES,CHIP 2.2K 1/8W LED802 8-719-038-07 LED CL-190PG-CD-T (6) R703 1-216-049-11 RES,CHIP 1/10W < RESISTOR > R704 1-216-017-00 RES,CHIP 1/10W R705 1-216-073-00 METAL CHIP 1/10W R800 1-216-049-11 RES,CHIP 1/10W R706...
  • Page 55 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark ACCESSORIES & PACKING MATERIALS ******************************** 1-473-067-71 WIRED REMOTE COMMANDER (RM-X4S) 3-012-070-01 LABEL (SOUND) (2) (for RM-X4S) 3-865-829-11 MANUAL, INSTRUCTION (ENGLISH, SPANISH, SWEDISH) (AEP, UK) +P4 × 6 3-865-829-21 MANUAL, INSTRUCTION FRAME ×...
  • Page 57 XR-C7220R Sony Corporation 99B057542-1 9-926-430-11 Personal & Mobile Communication Company Printed in Hungary © 1999. 2 – 70 – Published by Quality Assurance Dept.

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