Sony - HCD - GPX5G - GPX7G - GPX8G ver.1.1.pdf

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HCD-GPX5G/GPX7G/GPX8G SERVICE MANUAL E Model Ver. 1.1 2012.07 ã HCD-GPX5G is the amplifier, USB, CD player and tuner section in MHC-GPX5. ã HCD-GPX7G is the amplifier, USB, CD player and tuner section in MHC-GPX7. ã HCD-GPX8G is the amplifier, USB, CD player and tuner section in MHC-GPX8. Photo: HCD-GPX8G (E2 Model) “WALKMAN” and “WALKMAN” logo are registered trademarks of Sony Corporation. MPEG Layer-3 audio coding technology and patents licensed from Fraunhofer IIS and Thomson. CD Secti

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  SERVICE MANUAL Sony Corporation Published by Sony EMCS (Malaysia) PG Tec HCD-GPX5G/GPX7G/GPX8G SPECIFICATIONS9-890-600-02 2012G08-1 © 2012.07 E Model  Ver. 1.1 2012.07 ã HCD-GPX5G is the ampli fi er, USB, CD player and tuner section in MHC-GPX5.ã HCD-GPX7G is the ampli fi er, USB, CD player and tuner section in MHC-GPX7.ã HCD-GPX8G is the ampli fi er, USB, CD player and tuner section in MHC-GPX8.Photo: HCD-GPX8G (E2 Model) “WALKMAN” and “WALKMAN” logo are registered trademarks of Sony Corporation.MPEG Layer-3 audio coding technology and patents licensed from Fraunhofer IIS and Thomson.Windows Media is either a registered trademark or trademark of Microsoft Corporation in the United States and/or other countries.This product contains technology subject to certain intellectual property rights of Microsoft.Use or distribution of this technology outside of this product is prohibited without the appropriate license(s) fromMicrosoft. CD SectionModel Name Using Similar Mechanism NEW CD Mechanism Type CDM74I-DVBU201//M Optical Pick-up NameCMS-ST6RFS3 COMPACT DISC RECEIVER Ampli fi er section The following are measured at Mexican model:AC 120 V – 240 V, 60 HzOther models:AC 120 V – 240 V, 50/60 Hz MHC-GPX8 Front/Satellite speaker  Power Output (rated): 300 W + 300 W (at 4 ohms, 1 kHz, 1% THD)Front speaker  RMS output power (reference): 360 W + 360 W (per channel at 6 ohms, 1 kHz)Satellite speaker  RMS output power (reference): 180 W+ 180 W (per channel at 12 ohms, 1 kHz)Subwoofer  RMS output power (reference): 260 W + 260 W (per channel at 8 ohms, 100 Hz) MHC-GPX7 HIGH speakers Power Output (rated): 300 W + 300 W (at 4 ohms, 1 kHz, 1% THD) RMS output power (reference): 495 W + 495 W (per channel at 4 ohms, 1 kHz)LOW speakers RMS output power (reference): 180 W + 180 W (10 ohms, 100 Hz) MHC-GPX5 Front speaker  Power Output (rated): 240 W + 240 W (at 5 ohms, 1 kHz, 1% THD) RMS output power (reference): 370 W + 370 W (per channel at 5 ohms, 1 kHz)Subwoofer  RMS output power (reference): 360 W (5 ohms, 100 Hz) Inputs TV (AUDIO IN) L/R  Voltage 1.2 V, impedance 47 kilohmsDVD/SAT (AUDIO IN) L/R  Voltage 1.2 V, impedance 47 kilohmsPC/GAME (AUDIO IN) L/R  Voltage 1.2 V, impedance 47 kilohmsMIC (MHC-GPX8/MHC-GPX7 only) Sensitivity 1 mV, impedance 10 kilohms   A (USB), B (USB) port: Type A USB section Supported bit rate MP3 (MPEG 1 Audio Layer-3): 32 kbps – 320 kbps, VBR  WMA: 48 kbps – 192 kbps AAC: 48 kbps – 320 kbpsSampling frequencies MP3 (MPEG 1 Audio Layer-3): 32 kHz/44.1 kHz/48 kHz WMA: 44.1 kHz AAC: 44.1 kHzSupported USB device Mass Storage ClassMaximum current 500 mA Disc player section System Compact disc and digital audio systemLaser Diode Properties Emission Duration: Continuous Laser Output*: Less than 44.6 μ W * This output is the value measurement at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture.Frequency response 20 Hz – 20 kHzSignal-to-noise ratio More than 90 dBDynamic range More than 88 dB Tuner section FM stereo, FM/AM superheterodyne tuner Antenna: FM lead antenna AM loop antenna FM tuner section Tuning range 87.5 MHz – 108.0 MHz (50 kHz step) AM tuner section Tuning range Pan American models: 530 kHz – 1,710 kHz (10 kHz step) 531 kHz – 1,710 kHz (9 kHz step) Other models: 530 kHz – 1,610 kHz (10 kHz step) 531 kHz – 1,602 kHz (9 kHz step) General Power requirements Mexican model: AC 120 V – 240 V, 60 Hz Other models: AC 120 V – 240 V, 50/60 HzPower consumption MHC-GPX8: 250 WMHC-GPX7: 230 WMHC-GPX5: 200 WDimensions (w/h/d) (excl. speakers)(Approx.) 280 mm × 355 mm × 440 mmMass (excl. speakers) (Approx.) HCD-GPX8G/HCD-GPX7G/HCD-GPX5G: 7.0 kgSupplied accessories Remote control (1)R6 (Size AA) batteries (2)FM lead/AM loop antenna (1)Spacer A (MHC-GPX8 only) (2)Spacer B (MHC-GPX8 only) (2) Speaker pads (MHC-GPX7 only) (8)Design and speci fi cations are subject to change without notice.  HCD-GPX5G/GPX7G/GPX8G 2  NOTES ON CHIP COMPONENT REPLACEMENT ã Never reuse a disconnected chip component.ã Notice that the minus side of a tantalum capacitor may be damaged by heat. FLEXIBLE CIRCUIT BOARD REPAIRING ã Keep the temperature of soldering iron around 270 °C during repairing.ã Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).ã Be careful not to apply force on the conductor when soldering or unsoldering. SAFETY-RELATED COMPONENT WARNING!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.CAUTION Use of controls or adjustments or performance of procedures other than those speci fi ed herein may result in hazardous radiation exposure. SAFETY CHECK-OUT After correcting the srcinal service problem, perform the following safety check before releasing the set to the customer:Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage.Check leakage as described below. LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes.). Leakage current can be measured by any one of three methods.1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers’ instructions to use these instruments.2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job.3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A) 1.5 k  Ω 0.15 μ F  AC voltmeter (0.75 V)To Exposed Metal Parts on Set Earth Ground  Fig. A. Using an AC voltmeter to check AC leakage. This appliance is classified as a CLASS 1 LASER product. This marking is located on the rear exterior.  HCD-GPX5G/GPX7G/GPX8G 3 TABLE OF CONTENTS1. SERVICING NOTES  ................................................ 4 2. DISASSEMBLY 2-1. Disassembly Flow ........................................................... 82-2. Case ................................................................................. 92-3. Loading Panel ................................................................. 92-4. Front Panel Section ......................................................... 102-5. CD Mechanism Section (CDM741-DVBU201//M) ....... 102-6. TUNER1AM3R Board ................................................... 112-7. MAIN Board ................................................................... 112-8. Back Panel Section ......................................................... 122-9. 4CH DAMP board .......................................................... 132-10. Chassis Section ............................................................... 142-11. Cover Dust CDM ........................................................... 152-12. Optical Pick Up ............................................................... 152-13. DMB22 Board ................................................................. 162-14. DRIVER Board, SWITCH Board ................................... 162-15. SENSOR Board .............................................................. 172-16. MOTOR (TB) Board....................................................... 172-17. MOTOR (LD) Board ...................................................... 18 3. TEST MODE  ............................................................. 19 4. ELECTRICAL CHECK  .......................................... 22 5. DIAGRAMS 5-1. Block Diagram - CD/USB Section - ............................... 235-2. Block Diagram - MAIN Section - ................................... 245-3. Block Diagram - AMP Section - ..................................... 255-4. Block Diagram - PANEL/POWER SUPPLY Section - .. 265-5. Printed Wiring Board - 4CH DAMP Board (Component side) ............................ 285-6. Printed Wiring Board - 4CH DAMP Board (Conductor side) .............................. 295-7. Schematic Diagram - 4CH DAMP Board (1/3) - ............ 305-8. Schematic Diagram - 4CH DAMP Board (2/3) - ............ 315-9. Schematic Diagram - 4CH DAMP Board (3/3) - ............ 325-10. Printed Wiring Board - DISPLAY Board - ..................... 335-11. Schematic Diagram - DISPLAY Board - ........................ 345-12. Printed Wiring Board - MAIN Board (Component side) ..................................... 355-13. Printed Wiring Board - MAIN Board (Conductor side) ....................................... 365-14. Schematic Diagram - MAIN Board (1/4) - ..................... 375-15. Schematic Diagram - MAIN Board (2/4) - ..................... 385-16. Schematic Diagram - MAIN Board (3/4) - ..................... 395-17. Schematic Diagram - MAIN Board (4/4) - ..................... 405-18. Printed Wiring Board - USB, VOLUME and MIC Board - ................................. 415-19. Schematic Diagram - USB, VOLUME and MIC Board - ................................. 425-20. Printed Wiring Board - DRIVER, SENSOR, SWITCH, MOTOR (LD) and MOTOR (TB) Board ....................... 435-21. Schematic Diagram - DRIVER, SENSOR, SWITCH, MOTOR (LD) and MOTOR (TB) Board - ..................... 445-22. Printed Wiring Board - TUNER1AM3R Board ............. 455-23. Schematic Diagram - TUNER1AM3R Board - .............. 455-24. Printed Wiring Board - DMB22 Board - ........................ 465-25. Schematic Diagram - DMB22 Board (1/3) - .................. 475-26. Schematic Diagram - DMB22 Board (2/3) - .................. 485-27. Schematic Diagram - DMB22 Board (3/3) - .................. 49 6. EXPLODED VIEWS 6-1. Case Section ................................................................... 616-2. Front Panel Section ........................................................ 626-3. Back Panel Section ......................................................... 636-4. Chassis Section ............................................................... 646-5. CD Mechanism Section (1)(CDM74I-DVBU201//M) ............................................... 656-6. CD Mechanism Section (2) ............................................. 66 7. ELECTRICAL PARTS LIST  ............................... 67  HCD-GPX5G/GPX7G/GPX8G 4 SECTION 1SERVICING NOTES NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro-static break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body.During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts.The fl exible board is easily damaged and should be handled with care. UNLEADED SOLDER Boards requiring use of unleaded solder are printed with the lead-free mark (LF) indicating the solder contains no lead.( Caution:  Some printed circuit boards may not come printed with the lead free mark due to their particular size)  : LEAD FREE MARK Unleaded solder has the following characteristics.ã Unleaded solder melts at a temperature about 40 °C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350 °C. Caution:  The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful!ã Strong viscosity Unleaded solder is more viscous (sticky, less prone to fl ow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc.ã Usable with ordinary solder  It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder. NOTE OF REPLACING THE IC502 ON THE DMB22 BOARD IC502 on the DMB22 board cannot exchange with single. When these parts on the DMB22 board are damaged, exchange the entire mounted board. RELEASING THE DISC TRAY LOCK The disc tray lock function for the antitheft of an demonstration disc in the store is equipped. Releasing Procedure: 1. Press [ I / 1  STANDBY] button to turn the power on.2. Press the [CD/DISC SKIP] button to select CD function.3. While pressing the [ x ] button, press the [ENTER] button for more 5 seconds).4. The message “UNLOCKED” is displayed and the disc tray is unlocked. Note:  When “ LOCKED ”  is displayed, the slot lock is not released by turning power on/off with the  [ I / 1  STANDBY]  button. MODEL IDENTIFICATION – Back Panel – ModelPart No. HCD-GPX8G: E2, E51, E44-411-595-0 [] HCD-GPX7G: E2, E514-411-595-1 [] HCD-GPX5G: E2, E514-411-595-2 [] HCD-GPX8G: MX4-411-595-3 [] HCD-GPX7G: MX4-411-595-4 [] HCD-GPX5G: MX4-411-595-5 [] NOTES ON LASER DIODE EMISSION CHECK The laser beam on this model is concentrated so as to be focused on the disc re fl ective surface by the objective lens in the optical  pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens. PART No. Note : Refer to SUPPLEMENT-1 for adding SERVICING NOTES (TROUBLESHOOTING) Ver. 1.1
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