DOWNLOAD Sony HCD-GPX5G / HCD-GPX7G / HCD-GPX8G Service Manual ↓ Size: 6.11 MB | Pages: 87 in PDF or view online for FREE

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HCD-GPX5G HCD-GPX7G HCD-GPX8G
Pages
87
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6.11 MB
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Service Manual
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Device
Audio
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hcd-gpx5g-hcd-gpx7g-hcd-gpx8g.pdf
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Sony HCD-GPX5G / HCD-GPX7G / HCD-GPX8G Service Manual ▷ View online

SERVICE MANUAL
Sony Corporation
Published by Sony EMCS (Malaysia) PG Tec
HCD-GPX5G/GPX7G/GPX8G
SPECIFICATIONS
9-890-600-04
2013C08-1
© 
2013.03
E Model
Ver. 1.3  2013.03
•  HCD-GPX5G is the amplifi er, USB, CD player and tuner 
section in MHC-GPX5.
•  HCD-GPX7G is the amplifi er, USB, CD player and tuner 
section in MHC-GPX7.
•  HCD-GPX8G is the amplifi 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) from
Microsoft.
CD Section
Model Name Using Similar Mechanism
NEW
CD Mechanism Type
CDM74I-DVBU201//M
Optical Pick-up Name
CMS-ST6RFS3
COMPACT DISC RECEIVER
Amplifi er section
The following are measured at Mexican model:
AC 120 V – 240 V, 60 Hz
Other 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 kilohms
DVD/SAT (AUDIO IN) L/R
 
Voltage 1.2 V, impedance 47 kilohms
PC/GAME (AUDIO IN) L/R
 
Voltage 1.2 V, impedance 47 kilohms
MIC (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 kbps
Sampling frequencies
 
MP3 (MPEG 1 Audio Layer-3):
 
32 kHz/44.1 kHz/48 kHz
 
WMA: 44.1 kHz
 
AAC: 44.1 kHz
Supported USB device
 
Mass Storage Class
Maximum current
 500 
mA
Disc player section
System
 
Compact disc and digital audio system
Laser Diode Properties
 
Emission Duration: Continuous
 
Laser Output*: Less than 44.6 μW
 
* 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 kHz
Signal-to-noise ratio
 
More than 90 dB
Dynamic 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 Hz
Power consumption
 MHC-GPX8: 
250 
W
MHC-GPX7: 230 W
MHC-GPX5: 200 W
Dimensions (w/h/d) (excl. speakers)
(Approx.)
 
280 mm × 355 mm × 440 mm
Mass (excl. speakers) (Approx.)
 HCD-GPX8G/HCD-GPX7G/
HCD-GPX5G: 7.0 kg
Supplied 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 specifi cations are subject to change 
without notice.
HCD-GPX5G/GPX7G/GPX8G
2
NOTES  ON  CHIP  COMPONENT  REPLACEMENT
•  Never reuse a disconnected chip component.
•  Notice that the minus side of a tantalum capacitor may be 
damaged by heat.
FLEXIBLE  CIRCUIT  BOARD  REPAIRING
•  Keep the temperature of soldering iron around 270 °C during 
repairing.
•  Do not touch the soldering iron on the same conductor of the 
circuit board (within 3 times).
•  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 specifi ed herein may result in hazardous 
radiation exposure.
SAFETY  CHECK-OUT
After correcting the original 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 
μF
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  CONTENTS
1. SERVICING 
NOTES
 ................................................  
4
2. DISASSEMBLY
2-1. Disassembly 
Flow 
...........................................................   8
2-2. Case 
.................................................................................   9
2-3. Loading 
Panel 
.................................................................   9
2-4.  Front Panel Section .........................................................   10
2-5.  CD Mechanism Section (CDM741-DVBU201//M) .......   10
2-6. TUNER1AM3R 
Board 
...................................................  11
2-7. MAIN 
Board 
...................................................................  11
2-8.  Back Panel Section .........................................................   12
2-9.  4CH DAMP board ..........................................................   13
2-10. Chassis Section ...............................................................   14
2-11.  Cover Dust CDM  ...........................................................   15
2-12.  Optical Pick Up ...............................................................   15
2-13. DMB22 Board .................................................................   16
2-14.  DRIVER Board, SWITCH Board ...................................   16
2-15. SENSOR Board ..............................................................   17
2-16.  MOTOR (TB) Board.......................................................   17
2-17.  MOTOR (LD) Board ......................................................   18
3. 
TEST  MODE
 .............................................................   19
4. 
ELECTRICAL  CHECK
 ..........................................   22
5. DIAGRAMS
5-1.  Block Diagram - CD/USB Section - ...............................   23
5-2.  Block Diagram - MAIN Section - ...................................   24
5-3.  Block Diagram - AMP Section - .....................................   25
5-4.  Block Diagram - PANEL/POWER SUPPLY Section - ..   26
5-5.  Printed Wiring Board - 
 
4CH DAMP Board (Component side) ............................   28
5-6.  Printed Wiring Board - 
 
4CH DAMP Board (Conductor side) ..............................   29
5-7.  Schematic Diagram - 4CH DAMP Board (1/3) - ............   30
5-8.  Schematic Diagram - 4CH DAMP Board (2/3) - ............   31
5-9.  Schematic Diagram - 4CH DAMP Board (3/3) - ............   32
5-10.  Printed Wiring Board - DISPLAY Board - .....................   33
5-11.  Schematic Diagram - DISPLAY Board - ........................   34
5-12.  Printed Wiring Board - 
 
MAIN Board (Component side) .....................................   35
5-13.  Printed Wiring Board - 
 
MAIN Board (Conductor side) .......................................   36
5-14.  Schematic Diagram - MAIN Board (1/4) - .....................   37
5-15.  Schematic Diagram - MAIN Board (2/4) - .....................   38
5-16.  Schematic Diagram - MAIN Board (3/4) - .....................   39
5-17.  Schematic Diagram - MAIN Board (4/4) - .....................   40
5-18.  Printed Wiring Board - 
 
USB, VOLUME and MIC Board - .................................   41
5-19.  Schematic Diagram - 
 
USB, VOLUME and MIC Board - .................................   42
5-20.  Printed Wiring Board - DRIVER, SENSOR, SWITCH, 
MOTOR (LD) and MOTOR (TB) Board .......................   43
5-21.  Schematic Diagram - DRIVER, SENSOR, SWITCH, 
 
MOTOR (LD) and MOTOR (TB) Board - .....................   44
5-22.  Printed Wiring Board - TUNER1AM3R Board  .............   45
5-23.  Schematic Diagram - TUNER1AM3R Board - ..............   45
5-24.  Printed Wiring Board - DMB22 Board - ........................   46
5-25.  Schematic Diagram - DMB22 Board (1/3) - ..................   47
5-26.  Schematic Diagram - DMB22 Board (2/3) - ..................   48
5-27.  Schematic Diagram - DMB22 Board (3/3) - ..................   49
6. 
EXPLODED  VIEWS
6-1.  Case Section  ...................................................................   61
6-2.  Front Panel Section  ........................................................   62
6-3.  Back Panel Section .........................................................   63
6-4. Chassis 
Section 
...............................................................  64
6-5.  CD Mechanism Section (1)
(CDM74I-DVBU201//M) ...............................................   65
6-6.  CD Mechanism Section (2) .............................................   66
7. 
ELECTRICAL  PARTS  LIST
 ...............................   67
HCD-GPX5G/GPX7G/GPX8G
4
SECTION  1
SERVICING  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.
•  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!
• 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.
• 
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 –
Model
Part No.
HCD-GPX8G: E2, E51, E4, AR
4-411-595-0[]
HCD-GPX7G: E2, E51
4-411-595-1[]
HCD-GPX5G: E2, E51, AR
4-411-595-2[]
HCD-GPX8G: MX
4-411-595-3[]
HCD-GPX7G: MX
4-411-595-4[]
HCD-GPX5G: MX
4-411-595-5[]
NOTES  ON  LASER DIODE  EMISSION  CHECK
The laser beam on this model is concentrated so as to be focused 
on the disc refl 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. 1.3
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  • Here you can View online or download the Service Manual for the Sony HCD-GPX5G / HCD-GPX7G / HCD-GPX8G in PDF for free, which will help you to disassemble, recover, fix and repair Sony HCD-GPX5G / HCD-GPX7G / HCD-GPX8G Audio. Information contained in Sony HCD-GPX5G / HCD-GPX7G / HCD-GPX8G Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.