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Sony CDX-GT121 Service Manual
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Sony CDX-GT121 Service Manual

Sony CDX-GT121 Service Manual

Fm/mw/lw compact disc player
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CDX-GT121/GT220/GT222
SERVICE MANUAL
Ver. 1.0 2007. 08
• The tuner and CD sections have no adjustments.
CD player section
Signal-to-noise ratio
120 dB
Frequency response
10 – 20,000 Hz
Wow and flutter
Below measurable limit
Tuner section
FM
Tuning range
87.5 – 108.0 MHz
Antenna terminal
External antenna connector
Intermediate frequency 10.7 MHz/450 kHz
Usable sensitivity
9 dBf
Selectivity
75 dB at 400 kHz
Signal-to-noise ratio
67 dB (stereo), 69 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
MW/LW
Tuning range
MW: 531 – 1,602 kHz
LW: 153 – 279 kHz
Antenna (aerial) terminal
External antenna (aerial) connector
Intermediate frequency 10.7 MHz/450 kHz
Sensitivity
MW: 30 µV, LW: 40 µV
Sony Corporation
9-887-811-01
eVehicle Division
2007H04-1
Published by Sony Techno Create Corporation
© 2007. 08
(Photo: CDX-GT220)
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
Power amplifier section
Outputs
Speaker impedance
Maximum power output
General
Output
Inputs
Tone controls
Loudness
FM/MW/LW COMPACT DISC PLAYER
AEP Model
UK Model
NEW
MG-101TC-188//Q
DAX-25A
Speaker outputs (sure seal connectors)
4 – 8 ohms
45 W × 4 (at 4 ohms)
Audio outputs terminal (sub/rear switchable)
Power antenna (aerial) relay control terminal
Power amplifier control terminal
Telephone ATT control terminal
Antenna (aerial) input terminal
AUX input jack (stereo mini jack)
Low: ±10 dB at 60 Hz (XPLOD)
Mid: ±10 dB at 1 kHz (XPLOD)
High: ±10 dB at 10 kHz (XPLOD)
+4 dB at 100 Hz
+2 dB at 10 kHz
– Continued on next page –

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  • Page 1 LW: 153 – 279 kHz Antenna (aerial) terminal External antenna (aerial) connector Intermediate frequency 10.7 MHz/450 kHz Sensitivity MW: 30 µV, LW: 40 µV FM/MW/LW COMPACT DISC PLAYER Sony Corporation 9-887-811-01 eVehicle Division 2007H04-1 Published by Sony Techno Create Corporation © 2007. 08...
  • Page 2 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. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

  • Page 3: Table Of Contents

    CDX-GT121/GT220/GT222 This compact disc player is classified as a CLASS 1 LASER TABLE OF CONTENTS product. The CLASS 1 LASER PRODUCT label is located on the exterior. SERVICE NOTE ............4 GENERAL Location of Controls ............5 Connections ..............5 DISASSEMBLY This label is located on the bottom of the chassis.

  • Page 4: Service Note

    CDX-GT121/GT220/GT222 SECTION 1 SERVICE NOTE EXTENSION CABLE AND SERVICE POSITION When repairing or servicing this set, connect the jig (extension cable) as shown below. • Connect the MAIN board (CNP301) and the SERVO board (CN2) with the extension cable (Part No. J-2502-076-1).

  • Page 5: General

    (front panel release) button page 4 J DSPL (display)/SCRL (scroll) button (CDX-GT225C/GT222/GT220) page 8 To change display items (press); scroll the display item (press and hold). DSPL (display) button (CDX-GT121) page 8 To change display items. PUSH SELECT K SEEK –/+ buttons...
  • Page 6 CDX-GT121/GT220/GT222 Note for the antenna (aerial) connecting Hinweis zum Anschließen der Antenne Remarque sur le raccordement de Nota per il collegamento dell’antenna Opmerking bij de antenne-aansluiting If your car antenna (aerial) is an Wenn Ihre Autoantenne der ISO-Norm l’antenne Se l’antenna dell’auto è di tipo...

  • Page 7: Disassembly

    CDX-GT121/GT220/GT222 SECTION 3 DISASSEMBLY Note: This set can be disassemble according to the following sequence. 3-1. SUB PANEL ASSY (Page 8) 3-2. CD MECHANISM BLOCK (Page 8) 3-4. SERVO BOARD 3-3. MAIN BOARD (Page 9) (Page 9) 3-5. CHASSIS (T) SUB ASSY (Page 10) 3-6.

  • Page 8: Sub Panel Assy

    CDX-GT121/GT220/GT222 Note: Follow the disassembly procedure in the numerical order given. 3-1. SUB PANEL ASSY 3 two claws 2 two claws 1 two screws (+PTT 2.6 × 6) 4 sub panel assy 3-2. CD MECHANISM BLOCK 6 bracket (CD) 7 CD mechanism block 5 two screws (+PTT 2.6 ×...

  • Page 9: Main Board

    CDX-GT121/GT220/GT222 3-3. MAIN BOARD 2 two screws (+PTT 2.6 × 8) 4 two screws (+P 2.6 × 8) 5 two screws (+PTT 2.6 × 10) 1 three ground point screws 6 screw (+PTT 2.6 × 6) (+P 2.6 × 10) 7 screw (+PTT 2.6 ×...

  • Page 10: Chassis (T) Sub Assy

    CDX-GT121/GT220/GT222 3-5. CHASSIS (T) SUB ASSY 2 two precision screws 1 two precision screws (+P 1.7 × 2.2) (+P 1.7 × 2.2) 4 chassis (T) sub assy 3 claw 3-6. ROLLER ARM ASSY 5 roller arm assy 4 gear (RA1)

  • Page 11: Chassis (Op) Assy

    CDX-GT121/GT220/GT222 3-7. CHASSIS (OP) ASSY 6 chassis (OP) assy 1 tension spring (KF) 7 coil spring (damper) (natural) 8 coil spring (damper) (blue) 4 slider (R) 3 lever (D) 2 gear (LE1) 3-8. CHUCKING ARM SUB ASSY 3 chucking arm sub assy 1 spring Note: Have this portion receive the chassis.

  • Page 12: Sled Motor Assy

    CDX-GT121/GT220/GT222 3-9. SLED MOTOR ASSY 2 three serration screws (M 2 × 3) 3 sled motor assy 1 spring turn table spring stand Note: Never remove these parts since they were adjusted. stand Note: Place the stand with care not to touch the turn table.

  • Page 13: Optical Pick-Up Section

    CDX-GT121/GT220/GT222 3-10. OPTICAL PICK-UP SECTION 2 optical pick-up section Note: Be careful not to touch the lens and hologram terminal when removing the optical pick-up section. 3-11. OPTICAL PICK-UP 1 pan tapping screw (M 1.4 × 2.5) 2 leaf spring (sub guide)

  • Page 14: Diagnosis Function

    CDX-GT121/GT220/GT222 SECTION 4 DIAGNOSIS FUNCTION Description of the Diagnostics function: 4. Contents of each display mode 4-1. Reset count display mode 1. Setting the Diag display mode With the power off, press the [4] button, [5] button, and [4] button on the set body or the remote control (for more than 2 seconds) in turn.
  • Page 15 CDX-GT121/GT220/GT222 4-5. CD error information display mode 4-6. OFFSET/FAILURE error display mode 4-5-1. Error description 0 6 1 X X X X X 0 5 1 Operating hours Error information Error description Error description Indication Description (in hexadecimal (0: OFFSET, 1: FAILURE)
  • Page 16 CDX-GT121/GT220/GT222 MEMO...

  • Page 17: Diagrams

    CDX-GT121/GT220/GT222 SECTION 5 DIAGRAMS 5-1. BLOCK DIAGRAM — MAIN SECTION — ELECTRONIC VOLUME IC401 J330 AUDIO SUBOUT L R-CH SUBOUT R I2C BUS CONTROLLED R-CH REAR POWER AMP/MULTIPLE VOLTAGE REGULATOR MUTE IC750 Q481 R-CH J901 CN601 9 AUX-LCH R-CH 7 AUX-RCH...

  • Page 18: Block Diagram -Display Section

    CDX-GT121/GT220/GT222 5-2. BLOCK DIAGRAM — DISPLAY SECTION — • NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. SYSTEM CONTROL DISPLAY CONTROL (In addition to this, the necessary note is...

  • Page 19: Printed Wiring Board -Main Section

    CDX-GT121/GT220/GT222 5-3. PRINTED WIRING BOARD — MAIN SECTION — : Uses unleaded solder. J330 CN601 C464 C775 C774 JW32 FU601 R482 R472 C751 IC750 C765 C764 C771 R432 C763 JW14 C753 R442 C617 R471 C442 JW16 JW19 D617 C432 JW15...

  • Page 20: Schematic Diagram -Main Section (1/4)

    CDX-GT121/GT220/GT222 • Refer to page 18 for Waveforms. 5-4. SCHEMATIC DIAGRAM — MAIN SECTION (1/4) — • Refer to page 26 for IC Block Diagrams. J330 C464 C454 R431 C431 JW126 Q431 R432 C412 IC401 C401 C413 Q451 R452 C404...

  • Page 21: Schematic Diagram -Main Section (2/4)

    CDX-GT121/GT220/GT222 5-5. SCHEMATIC DIAGRAM — MAIN SECTION (2/4) — • Refer to page 26 for IC Block Diagrams. C775 C765 C764 C774 C751 D751 D752 C750 D753 IC B/D D754 JC754 JC755 D755 D756 C435 C432 IC750 D757 D758 CN601...

  • Page 22: Schematic Diagram -Main Section (3/4)

    CDX-GT121/GT220/GT222 • Refer to page 18 for Waveforms. 5-6. SCHEMATIC DIAGRAM — MAIN SECTION (3/4) — • Refer to page 27 for IC Pin Description of IC501. (Page 20) (Page 21) D511 R531 R690 R536 R535 R693 R692 R564 R519...

  • Page 23: Schematic Diagram -Main Section (4/4)

    CDX-GT121/GT220/GT222 5-7. SCHEMATIC DIAGRAM — MAIN SECTION (4/4) — (Page 21) (Page 20) JC681 FB604 R155 C153 C151 C152 IC602 C623 R153 C622 R154 D719 R601 R151 R152 L151 C519 C154 C155 CN701 JW52 Q651 JW53 JW140 R541 R653 (Page 22)

  • Page 24: Printed Wiring Board -Key Section

    CDX-GT121/GT220/GT222 5-8. PRINTED WIRING BOARD — KEY SECTION — : Uses unleaded solder. LED942 LED942, LED941, S902 LED944, S901 S903 S902 LED931 (LCD BACK LIGHT) S901 R902 R943 S903 LED943 LED951 LCD901 LSW901 LIQUID CRYSTAL DISPLAY PANEL LSW904 LSW903 R948...

  • Page 25: Schematic Diagram -Key Section

    CDX-GT121/GT220/GT222 5-9. SCHEMATIC DIAGRAM — KEY SECTION — R975 R943 R945 R949 R951 LSW903(2/2) LED941 LED951 R981 R931 LED944 LSW905(2/2) R982 LSW901(2/2) LSW911(2/2) R932 R941 IC971 R971 R933 R947 LSW908(2/2) R942 LSW902(2/2) C971 LED931 LSW906(2/2) LED952 LSW904(2/2) LSW910(2/2) LED945 LSW909(2/2)
  • Page 26 CDX-GT121/GT220/GT222 • IC Block Diagrams IC401 BD3442FS-E2 (MAIN Board (1/4)) IC750 TDA8589BJ/N2/R1/M5 (MAIN Board (2/4)) BUS-L VCC2 32 FIL OUT-FL- C BUS 100k 31 GND BUS-R OUT-FL+ INPUT INPUT VOLUME1 TREBLE VOLUME2 100k SELECTOR GAIN /MUTE /BASS TU-L 3 30 SDA...
  • Page 27 CDX-GT121/GT220/GT222 • IC PIN DESCRIPTIONS • IC501 MB90F045PF-G-9065-SPE2 (SYSTEM CONTROL) (MAIN BOARD (3/4)) Pin No. Pin Name Pin Description AREASEL0 Destination function setting pin 0 AREASEL1 Destination function setting pin 1 AREASEL2 Destination function setting pin 2 AREASEL3 Destination function setting pin 3...
  • Page 28 CDX-GT121/GT220/GT222 Pin No. Pin Name Pin Description CODEC_SEL MP3 select signal input “H”: MP3, “L”: Non-MP3 ILLUMI SEL Illumination voltage setting signal input “H”: 10.4 V, “L”: 9.0 V Not used. (Open) SIRCS Remote control signal input 65 to 67 Not used.

  • Page 29: Exploded Views

    CDX-GT121/GT220/GT222 SECTION 6 EXPLODED VIEWS NOTE: • The mechanical parts with no reference • -XX and -X mean standardized parts, so The components identified by mark 0 or dotted line with mark number in the exploded views are not supplied.

  • Page 30: Front Panel Section

    A-1314-001-A PANEL COMPLETE ASSY, FRONT (GT121) 3-214-259-11 ILLUMINATOR (LCD) X-2179-451-1 BUTTON ASSY (S) 3-214-246-01 PANEL, BACK 3-251-320-01 EMBLEM (NO. 2.5), SONY 3-250-543-21 SCREW (+B P-TITE M2) X-2179-388-1 PANEL SUB ASSY, FRONT (GT121) X-2149-228-2 CASE ASSY (for FRONT PANEL) X-2179-389-1 PANEL SUB ASSY, FRONT (GT220)

  • Page 31: Cd Mechanism Section (Mg-101Tc-188//Q)

    CDX-GT121/GT220/GT222 6-3. CD MECHANISM SECTION (MG-101TC-188//Q) not supplied not supplied not supplied not supplied not supplied not supplied not supplied not supplied not supplied not supplied not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-1289-450-A MECHANICAL BLOCK ASSY (08) 3-348-998-31 SCREW (M1.4X2.5), TAPPING, PAN...

  • Page 32: Electrical Parts List

    CDX-GT121/GT220/GT222 SECTION 7 ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in • Items marked “*” are not stocked since The components identified by mark 0 or dotted line with mark the parts list may be different from the they are seldom required for routine service.
  • Page 33 CDX-GT121/GT220/GT222 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R912 1-216-824-11 METAL CHIP 1.8K 1/10W A-1313-874-A MAIN BOARD, COMPLETE (GT220/GT222) R913 1-216-825-11 METAL CHIP 2.2K 1/10W A-1313-999-A MAIN BOARD, COMPLETE (GT121) R914 1-216-827-11 METAL CHIP 3.3K...
  • Page 34 CDX-GT121/GT220/GT222 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C454 1-163-251-11 CERAMIC CHIP 100PF D502 6-502-131-01 DIODE LRB751V-40T1G (GT220/GT222) C455 1-165-908-11 CERAMIC CHIP D503 8-719-988-61 DIODE 1SS355TE-17 C461 1-126-964-11 ELECT 10uF D510 6-501-656-01 DIODE LBAT54ALT1G...
  • Page 35 CDX-GT121/GT220/GT222 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 6-551-696-01 TRANSISTOR ISA1235AC1TP-1EF R472 1-216-833-11 METAL CHIP 1/10W Q431 8-729-027-44 TRANSISTOR DTC114TKA-T146 R479 1-216-805-11 METAL CHIP 1/10W Q441 8-729-027-44 TRANSISTOR DTC114TKA-T146 R481 1-216-813-11 METAL CHIP 1/10W...
  • Page 36 CDX-GT121/GT220/GT222 MAIN SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R609 1-249-425-11 CARBON 4.7K 1/4W ACCESSORIES (GT121) ************ R631 1-249-425-11 CARBON 4.7K 1/4W R632 1-216-841-11 METAL CHIP 1/10W 3-218-435-11 MANUAL, INSTRUCTION (ENGLISH,GERMAN, R633 1-216-841-11 METAL CHIP...
  • Page 37 CDX-GT121/GT220/GT222 MEMO...

  • Page 38: Revision History

    CDX-GT121/GT220/GT222 REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the top of the revised page allows you to jump to the next revised page. Ver. Date Description of Revision 2007. 08...

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