Sony CDX-GT440U Service Manual
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Sony CDX-GT440U Service Manual

Sony CDX-GT440U Service Manual

Compact disc player
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SERVICE MANUAL
Ver. 1.0 2009.11
• The tuner and CD sections have no adjustments.
AUDIO POWER SPECIFICATIONS
(US model)
CEA2006 Standard
Power Output: 17 Watts RMS  4 at
4 Ohms < 1 % THD + N
SN Ratio: 82 dBA
(reference: 1 Watt into 4 Ohms)
Tuner section
FM
Tuning range:
CDX-GT440U: US model:
87.5 – 107.9 MHz
CDX-GT440U: AEP, UK, RU model/GT444U:
87.5 – 108.0 MHz
CDX-GT447UE:
FM1/FM2: 87.5 – 108.0 MHz (at 50 kHz step)
FM3: 65 – 74 MHz (at 30 kHz step)
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
Sony Corporation
9-889-701-01
2009K0400-1
Audio&Video Business Group
©
2009.11
Published by Sony Techno Create Corporation
CDX-GT440U/GT444U/
Photo: CDX-GT440U: AEP, UK model
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
AM (US model)
Tuning range: 530 – 1,710 kHz
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 25 kHz
Sensitivity: 26 V
MW/LW (AEP, UK, RU model)
Tuning range:
MW: 531 – 1,602 kHz
LW: 153 – 279 kHz
Antenna (aerial) terminal:
External antenna (aerial) connector
Intermediate frequency: 25 kHz
Sensitivity: MW: 26 V, LW: 45V
CD player section
Signal-to-noise ratio: 120 dB
Frequency response: 10 – 20,000 Hz
Wow and fl utter: Below measurable limit
FM/AM COMPACT DISC PLAYER
FM/MW/LW COMPACT DISC PLAYER
GT447UE
US Model
CDX-GT440U
AEP Model
UK Model
CDX-GT440U/GT444U
Russian Model
CDX-GT440U/GT447UE
CDX-GT33U
MG-101Y-188//Q
DAX-25A
USB Player section
Interface: USB (Full-speed)
Maximum current: 500mA
Power amplifi er section
Outputs: Speaker outputs (sure seal connectors)
Speaker impedance: 4 – 8 ohms
Maximum power output: 52 W  4 (at 4 ohms)
– Continued on next page –
AEP, UK, Russian model
US model
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  • Page 1 CDX-GT440U AEP Model Ver. 1.0 2009.11 UK Model CDX-GT440U/GT444U Russian Model CDX-GT440U/GT447UE Photo: CDX-GT440U: AEP, UK model • The tuner and CD sections have no adjustments. Model Name Using Similar Mechanism CDX-GT33U CD Drive Mechanism Type MG-101Y-188//Q AUDIO POWER SPECIFICATIONS...
  • 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-GT440U/GT444U/GT447UE This compact disc player is classifi ed as a CLASS 1 LASER TABLE OF CONTENTS product. The CLASS 1 LASER PRODUCT label is located on the exterior. SERVICE NOTE ............AEP, UK, Russian model: GENERAL Connections ..............DISASSEMBLY 3-1. Sub Panel Assy ...............

  • Page 4: Service Note

    CDX-GT440U/GT444U/GT447UE 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-GT440U/GT444U/GT447UE SECTION 2 This section is extracted GENERAL from instruction manual. CONNECTIONS • US model           ...
  • Page 6 CDX-GT440U/GT444U/GT447UE • AEP, UK, Russian model                      ...

  • Page 7: Disassembly

    CDX-GT440U/GT444U/GT447UE SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. 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-GT440U/GT444U/GT447UE 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 4 sub panel assy 3-2. CD MECHANISM BLOCK 7 bracket (CD) 8 CD mechanism block 6 two screws (+PTT 2.6...

  • Page 9: Main Board

    CDX-GT440U/GT444U/GT447UE 3-3. MAIN BOARD US model 2 two screws (+PTT 2.6 4 two screws (+P 2.6 5 two screws 1 three screws (+PTT 2.6 (+BTT 2.6 6 screw (+P 2.6 7 screw (+PTT 2.6 8 heat sink 9 MAIN board...

  • Page 10: Chassis (T) Sub Assy

    CDX-GT440U/GT444U/GT447UE 3-5. CHASSIS (T) SUB ASSY 2 two screws 1 two screws (M 1.7 2.5) (M 1.7 2.5) 4 chassis (T) sub assy 3 claw 3-6. ROLLER ARM ASSY 6 roller arm assy 4 gear (RA1) 1 spring (RAL) 3 washer...

  • Page 11: Chassis (Op) Assy

    CDX-GT440U/GT444U/GT447UE 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 12: Sled Motor Assy

    CDX-GT440U/GT444U/GT447UE 3-9. SLED MOTOR ASSY 2 three serration screws (M 2 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 13: 3-10. Optical Pick-Up Section

    CDX-GT440U/GT444U/GT447UE 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 14: Diagrams

    CDX-GT440U/GT444U/GT447UE SECTION 4 DIAGRAMS THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) For Printed Wiring Boards: For Schematic Diagrams: Note: Note: • All capacitors are in F unless otherwise noted. (p: pF) •...

  • Page 15: Block Diagram -Main Section

    CDX-GT440U/GT444U/GT447UE 4-1. BLOCK DIAGRAM – MAIN Section – AEP, UK, RU MODEL J303 AUDIO REAR/SUB R-CH ELECTRONIC VOLUME IC302 US MODEL R/S_OUT_LCH REAR/SUB R/S_OUT_RCH R-CH (REAR/SUB) J302 R-CH AUDIO R-CH ZAPPIN1 J901 FRONT I2C BUS CONTROLLED MUTE 7 AUX_LCH R-CH...

  • Page 16: Block Diagram -Display Section

    CDX-GT440U/GT444U/GT447UE 4-2. BLOCK DIAGRAM – DISPLAY Section – SYSTEM CONTROL LCD DRIVER,LED CONTROL IC401 (2/2) IC901 SEG48 KEY_IN1 KEY MATRIX LCD901 LSW905–913, SEG1 LCD_SO DATA LIQUID PANEL+B KEY_IN0 S901–907 LCD_SCK CLK LCD CRYSTAL DISPLAY LCD_CE LED903,905,907,909,910,912, PANEL COM4 LED901 LED924,925,928,928...

  • Page 17: Printed Wiring Board -Main Section

    CDX-GT440U/GT444U/GT447UE 4-3. PRINTED WIRING BOARD – MAIN Section – • : Uses unleaded solder. J302 J303 (US) (AEP,UK,RU) AUDIO OUT REAR/SUB FRONT US MODEL J801 (REMOTE IN) C115 C215 CN802 R829 C107 C114 C214 C304 C207 C315 JW220 R826 R107...

  • Page 18: Schematic Diagram -Main Section (1/3)

    CDX-GT440U/GT444U/GT447UE 4-4. SCHEMATIC DIAGRAM – MAIN Section (1/3) – • See page 23 for IC Block Diagrams. IC B/D IC301 MAIN BOARD (1/3) IC301 TDA8588AJ/N2/R1 (GT440U:US/GT447UE) TDA8588AJ/N2/R1/M5 (GT440U:AEP,UK,RU/GT444U) I2C BUS CONTROLLED POWER AMP/MULTIPLE R830 VOLTAGE REGULATOR AEP,UK,RU MODEL US MODEL...

  • Page 19: Schematic Diagram -Main Section (2/3)

    CDX-GT440U/GT444U/GT447UE 4-5. SCHEMATIC DIAGRAM – MAIN Section (2/3) – • See page 14 for Waveforms. • See page 24 for IC Block Diagrams. • See page 27 for IC Pin Function Description. (Page 18) MAIN BOARD (1/3) MAIN BOARD (2/3)

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

    CDX-GT440U/GT444U/GT447UE 4-6. SCHEMATIC DIAGRAM – MAIN Section (3/3) – • See page 14 for Waveforms. • See page 25 for IC Block Diagrams. MAIN BOARD (3/3) AEP,UK,RU MODEL J303 C213 C113 100p 100p C207 C107 REAR/SUB AUDIO OUT 100p 100p...

  • Page 21: Printed Wiring Boards -Key Section

    CDX-GT440U/GT444U/GT447UE 4-7. PRINTED WIRING BOARDS – KEY Section – • : Uses unleaded solder. LED903,S901 LED907,932 (ILLUMINATOR) LED905 LED914,S902 DISC SLOT S901 SOURCE/OFF INDICATOR R948 LED914 LED905 LED910,S903 S902 M M= S903 /SEEK+ LED919,S904 S904 S906 LED919 LCD901 LED921,S906 LED901...

  • Page 22: Schematic Diagram -Key Section

    CDX-GT440U/GT444U/GT447UE 4-8. SCHEMATIC DIAGRAM – KEY Section – KEY BOARD CN901 LED903,905,907,909,910, 912,914,916,919,921,924, R907 925,928,929,932,934 SML-310PTT86TK IC902 USB_VBUS (GT444U/GT447UE) R906 R905 S[4] S[21] C912 SML-310VTT86TJ IC902 SEG4 SEG21 RS-470 S[3] S[22] (GT440U) USB_GND REMOTE CONTROL SEG3 SEG22 COM[4] S[23] R899,942,948,952,958,974,976,983...
  • Page 23 CDX-GT440U/GT444U/GT447UE • IC Block Diagrams IC301 TDA8588AJ/N2/R1 (CDX-GT440U: US/GT447UE) (MAIN Board (1/3)) IC301 TDA8588AJ/N2/R1/M5 (CDX-GT440U: AEP, UK, Russian/GT444U) (MAIN Board (1/3)) I2C_SIO OUT-FL– C BUS I2C_SCK OUT-FL+ OUT-RL– P-GND1 OUT-RL+ IN-RL IN-FL S-GND PROTECTION/ DIAGNOSTIC IN-FR IN-RR BEEP OUT-RR+ P-GND3 OUT-RR–...
  • Page 24 CDX-GT440U/GT444U/GT447UE IC402 TK11133CSCL-G (MAIN Board (1/3)) OVERHEAT & OVERCURRENT PROTECTION CONTROL CIRCUIT BAND GAP REFERENCE IC501 TPS40200DRG4 (MAIN Board (2/3)) UVLO ISNS DRIVER LOGIC E/A AND SS REFERENCE SOFT-START OVERCURRENT 700mV COMP ENABLE E/A IC502 TC7WH123FU(TE12R) (MAIN Board (2/3))
  • Page 25 OVERVOLTAGE THERMAL PROTECTION PROTECTION BAND GAP REFERENCE CONT VOUT VADJ IC001 TEF6617T/V1/S470,518 (CDX-GT440U: US/GT447UE) (MAIN Board (3/3)) IC001 TEF6617T/V1/S470/M5,518 (CDX-GT440U: AEP, UK, RU/GT444U) (MAIN Board (3/3)) AMRFIN 1 AMSELOUT2 AMSELOUT1 AMRFDEC 2 TUNER AMIFAGC1 FMIN2 3 AMSELIN2 TUNER FMIN1 4...
  • Page 26 CDX-GT440U/GT444U/GT447UE 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 • IC Pin Function Description MAIN BOARD (2/3) IC401 MB90F882PF-G-111E1 (SYSTEM CONTROL) Pin No. Pin Name Description Cyril select signal input (L: No cyril select (CDX-GT440U/GT444U), H: Cyril select (CDX- CYRIL_SEL GT447UE)) B-OUT_SEL Black out setting select signal input (L: No black out)
  • Page 28 CDX-GT440U/GT444U/GT447UE Pin No. Pin Name Description MC_RX MC-BUS communication and CD mechanism deck micon communication RX input MC_TX MC-BUS communication and CD mechanism deck micon communication TX output CLK_IN Flash programming serial clock signal input Z_MUTE Z mute signal input Not used.

  • Page 29: Exploded Views

    CDX-GT440U/GT444U/GT447UE 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

    Part No. Description Remark Ref. No. Part No. Description Remark A-1734-171-A PANEL COMPLETE ASSY, FRONT (GT440U:US) 3-251-320-01 EMBLEM (NO. 2.5), SONY A-1734-417-A PANEL COMPLETE ASSY, FRONT X-2514-264-1 KNOB (VOL) (SV) ASSY (GT440U:AEP,UK,RU) 2-639-881-01 SPRING (RELEASE) A-1734-421-A PANEL COMPLETE ASSY, FRONT (GT444U)

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

    CDX-GT440U/GT444U/GT447UE 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-GT440U/GT444U/GT447UE SECTION 6 JACK ELECTRICAL PARTS LIST Note: • Due to standardization, replacements in • CAPACITORS When indicating parts by reference num- the parts list may be different from the uF: μF ber, please include the board name. parts specifi ed in the diagrams or the com- •...
  • Page 33 CDX-GT440U/GT444U/GT447UE Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark LED925 6-502-877-01 LED SML-310VTT86TJ (RING ILLUMINATOR) R900 1-216-809-11 METAL CHIP 1/10W (GT440U) (GT440U) LED928 6-502-875-01 LED SML-310PTT86TK (RING ILLUMINATOR) R900 1-216-812-11 METAL CHIP 1/10W (GT444U/GT447UE) (GT444U/GT447UE) LED928...
  • Page 34 CDX-GT440U/GT444U/GT447UE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R959 1-216-809-11 METAL CHIP 1/10W R998 1-216-864-11 SHORT CHIP (GT440U) R999 1-216-295-91 SHORT CHIP R959 1-216-812-11 METAL CHIP 1/10W < ROTARY ENCODER > (GT444U/GT447UE) R962 1-216-809-11...
  • Page 35 CDX-GT440U/GT444U/GT447UE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C112 1-126-964-11 ELECT 10uF C426 1-162-964-11 CERAMIC CHIP 0.001uF C113 1-163-251-11 CERAMIC CHIP 100PF C427 1-162-964-11 CERAMIC CHIP 0.001uF C114 1-165-908-11 CERAMIC CHIP 1uF C428 1-162-964-11 CERAMIC CHIP 0.001uF...
  • Page 36 CDX-GT440U/GT444U/GT447UE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark D205 6-502-643-01 DIODE 1A4-A2 < JACK > D301 8-719-978-33 DIODE DTZ-TT11-6.8B D302 6-502-643-01 DIODE 1A4-A2 1-815-185-13 JACK (ANTENNA) D303 6-502-643-01 DIODE 1A4-A2 J302 1-774-699-42 JACK, PIN 4P (REAR/SUB AUDIO OUT,...
  • Page 37 CDX-GT440U/GT444U/GT447UE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark Q204 6-551-856-01 TRANSISTOR LTC614TKFP8T146 R404 1-216-864-11 SHORT CHIP Q303 8-729-027-43 TRANSISTOR DTC114EKA-T146 R405 1-216-849-11 METAL CHIP 220K 1/10W Q304 8-729-027-23 TRANSISTOR DTA114EKA-T146 R406 1-216-845-11 METAL CHIP...
  • Page 38 CDX-GT440U/GT444U/GT447UE MAIN SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R463 1-216-809-11 METAL CHIP 1/10W R829 1-216-864-11 SHORT CHIP R464 1-216-809-11 METAL CHIP 1/10W R830 1-216-864-11 SHORT CHIP R465 1-216-864-11 SHORT CHIP R832 1-216-833-11 METAL CHIP...
  • Page 39 CDX-GT440U/GT444U/GT447UE Ref. No. Part No. Description Remark PARTS FOR INSTALLATION AND CONNECTIONS ************************************* X-2179-431-2 FRAME ASSY, FITTING 1-465-459-41 ADAPTOR, ANTENNA (AEP,UK,RU) 1-831-838-11 CORD (WITH CONNECTOR) (ISO) (POWER) (AEP,UK,RU) 1-833-974-11 CONNECTION CORD FOR AUTOMOBILE (POWER) (US) 3-876-675-01 KEY (FRAME) 4-144-560-01 COLLAR...
  • Page 40 CDX-GT440U/GT444U/GT447UE 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 2009.11...

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