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Sony CDX-GT49UM Service Manual
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Sony CDX-GT49UM Service Manual

Fm/am compact disc player
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SERVICE MANUAL
Ver. 1.1 2009.11
• The tuner and CD sections have no adjustments.
Tuner section
FM
Tuning range:
Except Saudi Arabia model:
87.5 – 108.0 MHz (at 50 kHz step)
87.5 – 107.9 MHz (at 200 kHz step)
Saudi Arabia model:
87.5 – 108.0 MHz
FM tuning interval:
Except Saudi Arabia model:
50 kHz/200 kHz switchable
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 150 kHz
Usable sensitivity: 10 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 70 dB (mono)
Separation: 40 dB at 1 kHz
Frequency response: 20 – 15,000 Hz
AM
Tuning range:
Except Saudi Arabia model:
531 – 1,602 kHz (at 9 kHz step)
530 – 1,710 kHz (at 10 kHz step)
Saudi Arabia model:
531 – 1,602 kHz
AM tuning interval:
Except Saudi Arabia model:
9 kHz/10 kHz switchable
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 25 kHz
Sensitivity: 26 2V
Sony Corporation
9-889-625-02
2009K04-1
Audio&Video Business Group
©
2009.11
Published by Sony Techno Create Corporation
CDX-GT49UM/GT490U/
Photo: CDX-GT490US
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
CD player section
Signal-to-noise ratio: 120 dB
Frequency response: 10 – 20,000 Hz
Wow and fl utter: Below measurable limit
USB Player section
Interface: USB (Full-speed)
Maximum current: 500 mA
Power amplifi er section
Outputs: Speaker outputs (sure seal connectors)
Speaker impedance: 4 – 8 ohms
Maximum power output: 52 W K 4 (at 4 ohms)
General
Outputs:
Audio outputs terminal
(front, sub/rear switchable)
Power antenna (aerial) relay control terminal
Power amplifi er control terminal
Inputs:
Remote controller input terminal
Antenna (aerial) input terminal
AUX input jack (stereo mini jack)
USB signal input terminal
FM/AM COMPACT DISC PLAYER
GT490US/GT494U
CDX-GT490U/GT490US
Indian Model
CDX-GT49UM/GT494U
CDX-GT33U
MG-101Y-188//Q
DAX-25A
Tone controls:
Low: ±10 dB at 60 Hz (XPLOD)
Mid: ±10 dB at 1 kHz (XPLOD)
High: ±10 dB at 10 kHz (XPLOD)
Power requirements: 12 V DC car battery
(negative ground (earth))
Dimensions: Approx. 178 × 50 × 179 mm
1
1
(7
/
× 2 × 7
/
in.) (w/h/d)
8
8
Mounting dimensions:
Approx. 182 × 53 × 162 mm
1
1
1
(7
/
× 2
/
× 6
/
in.) (w/h/d)
4
8
2
Mass: Approx. 1.2 kg (2 lb. 11 oz.)
Supplied accessories:
Card remote commander: RM-X151
Parts for installation and connections (1 set)
Design and specifi cations are subject to change
without notice.
E Model

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Summary of Contents for Sony CDX-GT49UM

  • Page 1 Except Saudi Arabia model: 9 kHz/10 kHz switchable Antenna (aerial) terminal: External antenna (aerial) connector FM/AM COMPACT DISC PLAYER Intermediate frequency: 25 kHz Sensitivity: 26 2V Sony Corporation 9-889-625-02 2009K04-1 Audio&Video Business Group © 2009.11 Published by Sony Techno Create Corporation...
  • 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-GT49UM/GT490U/GT490US/GT494U TABLE OF CONTENTS SERVICE NOTE ............GENERAL Connections ..............This label is located on the bottom of the chassis. DISASSEMBLY 3-1. Sub Panel Assy ............... UNLEADED SOLDER 3-2. CD Mechanism Block ............. Boards requiring use of unleaded solder are printed with the lead- 3-3.

  • Page 4: Service Note

    CDX-GT49UM/GT490U/GT490US/GT494U 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 (CN701) and the SERVO board (CN401) with the extension cable (Part No. J-2502-076-1).

  • Page 5: General

    CDX-GT49UM/GT490U/GT490US/GT494U Ver. 1.1 SECTION 2 This section is extracted GENERAL from instruction manual. CONNECTIONS • E, Indian, Mexican model RCA pin cord (not supplied) Cable con terminales RCA (no AUDIO OUT can be switched SUB or REAR. suministrado) For details, see the supplied Operating AUDIO OUT (salida de audio) puede Instructions.
  • Page 6 CDX-GT49UM/GT490U/GT490US/GT494U • Argentina model Speaker, Rear, Right Altavoz, posterior, derecho Purple Morado Speaker, Rear, Right – Altavoz, posterior, derecho Speaker, Front, Right Altavoz, frontal, derecho Gray Gris FRONT REMOTE Speaker, Front, Right – AUDIO OUT Altavoz, frontal, derecho Speaker, Front, Left...
  • Page 7 CDX-GT49UM/GT490U/GT490US/GT494U • Saudi Arabia model Connection diagram 1 To a metal surface of the car First connect the black ground (earth) lead, then connect the yellow, and red power supply leads. 2 To the power antenna (aerial) control lead or power supply lead of antenna (aerial)

  • Page 8: Disassembly

    CDX-GT49UM/GT490U/GT490US/GT494U SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. 3-1. SUB PANEL ASSY (Page 9) 3-2. CD MECHANISM BLOCK (Page 9) 3-4. SERVO BOARD 3-3. MAIN BOARD (Page 10) (Page 10) 3-5. CHASSIS (T) SUB ASSY (Page 11) 3-6.

  • Page 9: Sub Panel Assy

    CDX-GT49UM/GT490U/GT490US/GT494U Note: Follow the disassembly procedure in the numerical order shown below. 3-1. SUB PANEL ASSY 3 two claws 2 two claws 1 two screws (+PTT 2.6 K 6) 4 sub panel assy 3-2. CD MECHANISM BLOCK 7 bracket (CD)

  • Page 10: Main Board

    CDX-GT49UM/GT490U/GT490US/GT494U 3-3. MAIN BOARD 2 two screws (+PTT 2.6 K 8) 4 two screws (+P 2.6 K 8) 5 two screws (+PTT 2.6 K 10) 1 three screws 6 screw (+BTT 2.6 K 5) (+P 2.6 K 8) 7 screw (+PTT 2.6 K 10)

  • Page 11: Chassis (T) Sub Assy

    CDX-GT49UM/GT490U/GT490US/GT494U 3-5. CHASSIS (T) SUB ASSY 2 two screws 1 two screws (M 1.7 K 2.5) (M 1.7 K 2.5) 4 chassis (T) sub assy 3 claw 3-6. ROLLER ARM ASSY 6 roller arm assy 4 gear (RA1) 1 spring (RAL)

  • Page 12: Chassis (Op) Assy

    CDX-GT49UM/GT490U/GT490US/GT494U 3-7. CHASSIS (OP) ASSY 6 chassis (OP) assy 1 tension spring (KF) 7 two coil springs (damper) (natural) 8 coil spring (damper) (green) 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 13: Sled Motor Assy

    CDX-GT49UM/GT490U/GT490US/GT494U 3-9. SLED MOTOR ASSY 2 three serration screws (M 2 K 3) 3 sled motor assy 1 spring turn table spring stand Note: Never remove these parts since they were adjusted. bearing (F) stand Note: Place the stand with care not to touch the turn table.

  • Page 14: 3-10. Optical Pick-Up Section

    CDX-GT49UM/GT490U/GT490US/GT494U 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 tapping screw (P 1.4) 2 leaf spring (OPS) 3 rack...

  • Page 18: Printed Wiring Board -Main Section

    R801 Q502 C502 S D D R802 D504 C514 Q802 Q807 L502 Q504 R816 JW203 S D D C521 R815 Q503 JW204 JW317 R512 IC501 Q808 C506 JL031 C504 JW205 R520 C807 JW206 R504 R517 Q505 JC105 R516 IC502 R514 C509 IC503 C508...

  • Page 19: Schematic Diagram -Main Section (1/3)

    BUS1 C411 1000 BU+B C409 0.01 C406 0.01 C407 0.22 C405 R832 14.4 0.22 C404 2.2uH L301 CONT PANEL+B 10.6 MECHA+6V VOUT NOISE SERVO+3.3V 0<3.3> AUDIO+B AMP-REM 13.7 CRES ANT-REM 13.7 DIAG P-GND4 OUT-FR- OUT-FR+ 14.4 OUT-RR- P-GND3 1A4-A2 OUT-RR+ D205 BEEP IN-RR...

  • Page 20: Schematic Diagram -Main Section (2/3)

    BUS1 1000p C427 1000p C426 0.5% 10k R441 0.5% 10k R440 1000p C425 0.5% 10k R439 CLK_IN UART/CLK MC_TX MC_RX XFLASH 100k R432 100k R433 TEL_ATT XFLASH 100k R447 100k R430 ACC_IN 100k R448 CDM_ON CDM_ON RESET CD_ON CD_ON AREA_SEL2 SYS_RST MODEL 100k...

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

    JW137 JW138 UDZSUSTE-176.8B D301 C302 1.5k R303 LTC614TKFP8T146 Q102 LTC614TKFP8T146 Q202 LTC614TKFP8T146 Q104 LTC614TKFP8T146 Q204 R213 R113 RT1N140C-TP-1 RT1N140C-TP-1 Q203 Q103...

  • Page 22: Printed Wiring Boards -Key Section

    FB902 FB903 FB901 LED903 CN902 R945 R946 VDR901 LED901 VDR900 C912 R928 D912 D911 D910 D909 D908 D907 D906 R907 R906 R931 D902 D901 C904 R904 C903 C902 C901 R915 R916 R909 R908 Q901 R989 R990 R991 R974 Q907 R975 R985 R999 R952...

  • Page 23: Schematic Diagram -Key Section

    COM[1] COM[2] COM[3] COM[4] SEG20 SEG37 S[48] S[20] S[37] SEG19 SEG38 S[47] S[19] S[38] SEG18 SEG39 S[46] S[18] S[39] SEG17 SEG40 S[45] S[17] S[40] SEG16 SEG41 S[44] S[16] S[41] SEG15 SEG42 S[43] S[15] S[42] SEG14 SEG43 S[42] S[14] S[43] S[41] SEG13 SEG44 S[13]...
  • Page 24 NOISE VOUT CONT REGULATOR MUTE MUTE...
  • Page 25 CDX-GT49UM/GT490U/GT490US/GT494U IC502 TC7WH123FU(TE12R) (MAIN Board (2/3)) IC503 NJM2387ADL3 (TE2) (MAIN Board (2/3)) CURRENT LIMIT OVERVOLTAGE THERMAL PROTECTION PROTECTION BAND GAP REFERENCE CONT VOUT VADJ IC001 TEF6617T/V1/S470,518 (MAIN Board (3/3)) AMRFIN 1 AMSELOUT2 AMSELOUT1 AMRFDEC 2 TUNER AMIFAGC1 FMIN2 3 AMSELIN2...
  • Page 26 CDX-GT49UM/GT490U/GT490US/GT494U IC302 BD3447AFV-E2 (MAIN Board (3/3)) I2C BUS LOGIC, FADER FADER FADER FADER FADER EFFECT 180°/0° 7 BAND 3 BAND P-EQ (TONE CONTROL) SPECTRUM ANALYZER /LEVEL METER VOLUME/MUTE SPEANA LVL METER LVL METER SPEANA INPUT GAIN INPUT SELECTOR (3 SIGLE-END AND 3 STEREO IS O)
  • Page 27 Power supply pin (+3.3 V) Š Ground Š Regulator reference capacitor connecting pin Š UNISI SONY-BUS data input (Fixed at L in this set) UNISO Not used. (Open) UNISCK Not used. (Open) USB_ON USB over current detect IC control signal output...
  • Page 28 CDX-GT49UM/GT490U/GT490US/GT494U Pin No. Pin Name Description CLK_IN Flash programming serial clock signal input Z_MUTE Z mute signal input Not used. (Open) TEST Not used. (Open) Power supply pin (+3.3 V) Š Ground Š Not used. (Open) AMP_STB Standby signal output for power regulator IC...

  • Page 29: Exploded Views

    CDX-GT49UM/GT490U/GT490US/GT494U Ver. 1.1 SECTION 5 EXPLODED VIEWS Note: • -XX and -X mean standardized parts, so • The mechanical parts with no reference The components identifi ed by mark 0 they may have some difference from the number in the exploded views are not sup- or dotted line with mark 0 are critical for original one.

  • Page 30: Front Panel Section

    PANEL (SV) ASSY, FRONT (GT490US) CN902 1-822-798-11 CONNECTOR, USB 6P (USB) X-2515-123-1 PANEL (SV) ASSY, FRONT (GT494U) LCD901 1-802-952-11 DISPLAY PANEL, LIQUID CRYSTAL X-2515-124-1 PANEL (SV) ASSY, FRONT (GT49UM) RE901 1-479-902-32 ENCODER, ROTARY (PUSH ENTER/SELECT (VOLUME)) 3-251-320-01 EMBLEM (NO. 2.5), SONY...

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

    CDX-GT49UM/GT490U/GT490US/GT494U 5-3. CD MECHANISM SECTION (MG-101Y-188//Q) not supplied 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.

  • Page 32: Electrical Parts List

    CDX-GT49UM/GT490U/GT490US/GT494U Ver. 1.1 SECTION 6 JACK ELECTRICAL PARTS LIST Note: • Due to standardization, replacements in • COILS When indicating parts by reference num- the parts list may be different from the uH: aH ber, please include the board name.
  • Page 33 CDX-GT49UM/GT490U/GT490US/GT494U Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark LED925 6-502-877-01 LED SML-310VTT86TJ (RING ILLUMINATOR) R900 1-216-812-11 METAL CHIP 1/10W (GT490U/GT490US/GT494U) (GT49UM) LED925 8-719-053-08 LED SML-310DTT86 (RING ILLUMINATOR) R904 1-216-857-11 METAL CHIP 1/10W (GT49UM) R905 1-216-809-11...
  • Page 34 CDX-GT49UM/GT490U/GT490US/GT494U MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R959 1-216-812-11 METAL CHIP 1/10W 1-107-826-11 CERAMIC CHIP 0.1uF (GT49UM) 1-107-826-11 CERAMIC CHIP 0.1uF R962 1-216-811-11 METAL CHIP 1/10W 1-107-826-11 CERAMIC CHIP 0.1uF R963 1-216-811-11 METAL CHIP...
  • Page 35 CDX-GT49UM/GT490U/GT490US/GT494U MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C406 1-162-970-11 CERAMIC CHIP 0.01uF C815 1-162-964-11 CERAMIC CHIP 0.001uF C407 1-162-970-11 CERAMIC CHIP 0.01uF C409 1-126-926-11 ELECT 1000uF < CONNECTOR > C411 1-126-924-11 ELECT 330uF...
  • Page 36 CDX-GT49UM/GT490U/GT490US/GT494U MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark IC401 6-808-763-02 IC MB90F882PF-G-111E1 < TRANSISTOR > IC402 6-702-302-01 IC TK11133CSCL-G IC403 6-712-776-01 IC PST8228UL Q102 6-551-856-01 TRANSISTOR LTC614TKFP8T146 IC501 6-710-965-01 IC TPS40200DRG4 Q103 8-729-027-44 TRANSISTOR DTC114TKA-T146...
  • Page 37 CDX-GT49UM/GT490U/GT490US/GT494U MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R308 1-216-811-11 METAL CHIP 1/10W R468 1-216-845-11 METAL CHIP 100K 1/10W R309 1-216-797-11 METAL CHIP 1/10W R501 1-216-842-11 METAL CHIP 1/10W R311 1-216-841-11 METAL CHIP 1/10W...
  • Page 38 CDX-GT49UM/GT490U/GT490US/GT494U Ver. 1.1 MAIN SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < VIBRATOR > PARTS FOR INSTALLATION AND CONNECTIONS ************************************** 1-814-300-11 QUARTZ CRYSTAL UNIT (4MHz) X401 1-814-207-21 VIBRATOR, CERAMIC (7.92MHz) X-2179-431-2 FRAME ASSY, FITTING...
  • Page 39 CDX-GT49UM/GT490U/GT490US/GT494U MEMO...

  • Page 40: Revision History

    CDX-GT49UM/GT490U/GT490US/GT494U REVISION HISTORY Checking 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 2009.09 2009.11...

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