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Sony XR-C7220 Service Manual

Fm/am (mw/sw) cassette car stereo
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XR-C7220/C7300/C7300W
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 trademarks
of Dolby Laboratories Licensing Corporation.
MICROFILM
Photo: XR-C7300
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
SPECIFICATIONS
US Model
Canadian Model
E Model
XR-C7300/C7300W
– Continued on next page –
FM/AM (MW/SW)
CASSETTE CAR STEREO
XR-C7220
XR-C5100
MG-25G-136

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Summary of Contents for Sony XR-C7220

  • Page 1 XR-C7220/C7300/C7300W SERVICE MANUAL US Model Canadian Model XR-C7220 E Model XR-C7300/C7300W For RM-X4S (Remote Commander), please refer to RM-X4S Service Manual Photo: XR-C7300 (9-925-698-∏) previously issued. Dolby noise reduction manufactured under license Model Name Using Similar Mechanism XR-C5100 from Dolby Laboratories Licensing Corporation.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS GENERAL Location of Controls ............3 Setting the Clock ............. 3 Installation ............... 4 Connections ..............6 DISASSEMBLY ............8 ASSEMBLY OF MECHANISM DECK ... 10 MECHANICAL ADJUSTMENTS ....... 13 ELECTRICAL ADJUSTMENTS Test Mode ................ 13 Tape Deck Section ............13 Tuner Section ..............
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  • Page 8: Disassembly

    SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. SUB PANEL ASS’Y 3 two claws 2 five screws (PTT2.6 × 8) 3 claw 4 connector (CN500) 1 screw (PTT2.6 × 8) 5 sub panel ass’y MECHANISM DECK (MG-25G-136) 1 screw (PTT2.6 ×...
  • Page 9 MAIN BOARD, HEAT SINK 5 three screws (PTT2.6 × 8) 5 two screws (PTT2.6 × 10) 3 two ground point 1 screw screws (PTT2.6 × 8) 5 three screws (PTT2.6 × 8) 6 heat sink 4 main board 2 rubber cap (25) 1 two screws (PTT2.6 ×...

  • Page 10: Assembly Of Mechanism Deck

    SECTION 3 ASSEMBLY OF MECHANISM DECK Note: Follow the assembly procedure in the numerical order given. HOUSING 7 Holder 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 11 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 12 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˚ – 12 –...

  • Page 13: Mechanical Adjustments

    SECTION 4 SECTION 5 MECHANICAL ADJUSTMENTS ELECTRICAL ADJUSTMENTS TEST MODE 1. Clean the following parts with a denatured-alcohol-moistened swab: This set have the test mode function. In the test mode, FM Auto playback head pinch roller Scan/Stop Level and MW Auto Scan/Stop Level adjustments can rubber belt capstan be performed easier than it in ordinary procedure.

  • Page 14: Tuner Section

    Dolby Level Adjustment (XR-C7300/C7300W only) TUNER SECTION Setting: [SHIFT] XR-C7220, the tuner section has no adjustment. button : ON Preset (PLAY MODE) and 0 dB=1 µV → ) buttons : NR OFF SOUND (BAS) button : Center Cautions during repair...
  • Page 15 FM Stereo Separation Adjustment MW Auto Scan/Stop Level Adjustment Setting: Setting: [SOURCE] [SOURCE] [MODE] button : FM buttons : MW FREQUENCY SELECT switch : FM 200 k FREQUENCY SELECT switch : MW 10 k FM RF signal level meter antenna jack (J1) generator 30 Ω...
  • Page 16 Adjustment Location: – SET UPPER VIEW – Tape Speed Adjustment (XR-C7300/C7300W only) RV1 MW Auto Scan/Stop Level Adjustment RV2 FM Auto Scan/Stop Level Adjustment RV4 FM Stereo Separation Adjustment RV201 RV101 (R-CH) (L-CH) Dolby Level Adjustment – SET BOTTOM VIEW – TP (DOLBY-R) Dolby Level TP (GND)

  • Page 17: Diagrams

    SECTION 6 DIAGRAMS 6-1. 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 •...
  • Page 18 • Waveforms – MAIN Board – – KEY Board – 1 IC1 2 (OSC OUT) 1 IC901 ^º OSC 2.7 Vp-p 1.2 Vp-p 0.1 µ s 27 µ s 2 IC501 &¢ (X0A) 3.6 Vp-p 30 µ s 3 IC501 (™ (X0) 4.1 Vp-p 270 ns –...
  • Page 19 XR-C7220/C7300/C7300W 6-2. SCHEMATIC DIAGRAM – MAIN Section (1/3) – • See page 18 for Waveforms. • See page 33 for IC Block Diagrams. (Page 23) (Page 21) – 19 – – 20 –...
  • Page 20 XR-C7220/C7300/C7300W 6-3. SCHEMATIC DIAGRAM – MAIN Section (2/3) – • See page 18 for Waveforms. • See page 33 for IC Block Diagrams. (Page (Page 23) – 21 – – 22 –...

  • Page 21: Schematic Diagram - Main Section (1/3)

    XR-C7220/C7300/C7300W 6-4. SCHEMATIC DIAGRAM – MAIN Section (3/3) – (Page 20) (Page 31) (Page 22) – 23 – – 24 –...

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

    XR-C7220/C7300/C7300W 6-5. PRINTED WIRING BOARD – MAIN Board (Component Side) – • Semiconductor Location Ref. No. Location Ref. No. Location F-14 D675 D701 C-12 D702 D-11 D703 D361 D704 D362 D705 D501 D706 D707 D551 K-12 D552 K-12 D553 K-10...

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

    XR-C7220/C7300/C7300W 6-6. PRINTED WIRING BOARD – MAIN Board (Conductor Side) – • Semiconductor Location Ref. No. Location D141 C-11 D171 C-11 D172 C-10 D568 K-13 D569 K-13 D601 D602 D603 D651 D708 IC611 IC671 Q631 Q632 (Page 30) – 27 –...

  • Page 24: Printed Wiring Boards - Panel Section

    XR-C7220/C7300/C7300W 6-7. PRINTED WIRING BOARDS – PANEL Section – (Page 27) • Semiconductor • Semiconductor Location Location – KEY Board – – KEY Board – (Component Side) (Conductor Side) Ref. No. Location Ref. No. Location IC951 C-11 D901 A-10 D902...
  • Page 25 XR-C7220/C7300/C7300W 6-8. SCHEMATIC DIAGRAM – PANEL Section – • See page 18 for Waveform. (Page 24) – 31 – – 32 –...
  • Page 26 • IC Block Diagrams IC401 TDA7462D – MAIN Board – IC1 TB2118F (EL) SE3L SE3R MUTE PAUSE PAUSE 24 23 22 21 16 15 14 13 DETECT FRONT INPUT TREBLE/ VOICE BANDPASS OUT FL LOUDNESS VOLUME FADER GAIN & SOFT BASS CONTROL SE1L...

  • Page 27: Ic Pin Function Description

    — Power supply terminal (+5V) Not used (open) BUS-ON Bus on/off control signal output to the SONY bus interface (IC701) “L”: bus on SYSRST Reset signal output to the SONY bus interface (IC701) “L”: reset DOORSW Front panel open/close detection signal input “L” is input when the front panel is closed...
  • Page 28 Pin No. Pin Name Function 40, 41 Not used (open) AVCC — Power supply terminal (+5V) (for A/D converter) AVRH Reference voltage (+5V) input terminal (for A/D converter) AVRL Reference voltage (0V) input terminal (for A/D converter) AVSS — Ground terminal (for A/D converter) Key input terminal (A/D input) (LSW901 to LSW904, S901, LSW906) KEYIN0 OFF, SOURCE, MODE *, SOUND, SEEK/AMS = 0 –...
  • Page 29 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 (IC701) and battery detect circuit BU-IN “L” is input at low voltage...
  • Page 30 Pin No. Pin Name Function Dolby control in/out terminal At initial mode: valid/invalid selection input of dolby function (valid at “L” input) DOLON At normal mode: dolby on/off control signal output to the CXA2510AQ (IC301) (dolby on at “H” output) Tape muting on/off control signal output to the CXA2510AQ (IC301) “H”: muting on TAPE MUTE Active at ATA, FF/REW mode...

  • Page 31: Exploded Views

    SECTION 7 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they may have some difference from the original are seldom required for routine service. Some one. delay should be anticipated when ordering •...
  • Page 32 (2) FRONT PANEL SECTION LCD901 not supplied (KEY board) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-031-089-01 BUTTON (1-6) (OFF. SHIFT. 1. 2. 3. 4. 5. 6) 3-031-047-11 LEVER (S/A) (+. -) (C7300W) 3-031-093-01 BUTTON (OPEN) (C7220/C7300) * 59 3-031-326-01 PLATE (A), GROUND 3-031-093-11 BUTTON (OPEN) (C7300W)
  • Page 33 (3) MECHANISM DECK SECTION (MG-25G-136) HP901 M901 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3375-691-1 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 34: Electrical Parts List

    SECTION 8 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 35 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R930 1-216-671-11 METAL CHIP 6.8K 0.5% 1/10W 1-163-251-11 CERAMIC CHIP 100PF R931 1-208-806-11 RES,CHIP 1/10W 1-163-021-11 CERAMIC CHIP 0.01uF R932 1-208-810-11 RES,CHIP 1/10W 1-163-251-11 CERAMIC CHIP 100PF R951 1-216-045-00 METAL CHIP 1/10W...
  • Page 36 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C210 1-163-007-11 CERAMIC CHIP 680PF C622 1-163-809-11 CERAMIC CHIP 0.047uF C211 1-126-163-11 ELECT 4.7uF C623 1-109-982-11 CERAMIC CHIP C235 1-163-227-11 CERAMIC CHIP 10PF 0.5PF C631 1-164-489-11 CERAMIC CHIP 0.22uF C241 1-163-251-11 CERAMIC CHIP...
  • Page 37 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark D602 8-719-056-93 DIODE UDZ-TE-17-18B < SHORT > D603 8-719-056-93 DIODE UDZ-TE-17-18B D604 8-719-105-99 DIODE RD6.2M-B1 1-216-295-00 SHORT 0 (C7220) D605 8-719-105-99 DIODE RD6.2M-B1 1-216-295-00 SHORT D611 8-719-053-18 DIODE 1SR154-400TE-25 1-216-295-00 SHORT JC181 1-216-295-00 SHORT...
  • Page 38 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-067-00 METAL CHIP 5.6K 1/10W R304 1-216-105-00 RES,CHIP 220K 1/10W 1-216-049-11 RES,CHIP 1/10W R305 1-216-001-00 METAL CHIP 1/10W 1-216-073-00 METAL CHIP 1/10W R306 1-216-073-00 METAL CHIP 1/10W 1-216-295-00 SHORT 1-216-049-11 RES,CHIP 1/10W...
  • Page 39 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-673-172-11 SUB BOARD R622 1-216-295-00 RES,CHIP 1/10W ********** R623 1-216-073-00 METAL CHIP 1/10W R624 1-216-049-11 RES,CHIP 1/10W < CONNECTOR > R625 1-216-049-11 RES,CHIP 1/10W R631 1-249-389-11 CARBON 1/4W CNP801 1-774-944-11 SOCKET, CONNECTOR 14P R632...
  • Page 40 XR-C7220/C7300/C7300W Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark PARTS FOR INSTALLATION AND CONNECTIONS ************************************** X-3370-076-1 SCREW ASSY (KEY), FITTING (C7220) 3-924-961-01 SUPPORT (ND), FITTING (C7220) X-3370-077-1 SCREW ASSY (AE. KEY), FITTING (C7300/C7300W) X-3373-432-1 BRACKET ASSY (for RM-X4S)

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