DOWNLOAD Sony HCD-GN700 / HCD-GX8800 / MHC-GN700 / MHC-GX8800 Service Manual ↓ Size: 4.66 MB | Pages: 71 in PDF or view online for FREE

Model
HCD-GN700 HCD-GX8800 MHC-GN700 MHC-GX8800
Pages
71
Size
4.66 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-gn700-hcd-gx8800-mhc-gn700-mhc-gx8800.pdf
Date

Sony HCD-GN700 / HCD-GX8800 / MHC-GN700 / MHC-GX8800 Service Manual ▷ View online

Model Name Using Similar Mechanism
NEW
CD
CD Mechanism Type
CDM74-K6BD47S
Section
Base Unit Name
BU-K6BD47S
Optical Pick-up Name
KSM-213DCP
TAPE
Model Name Using Similar Mechanism
HCD-XGR66/XGR600
Section
Tape Transport Mechanism Type
CWM43RR23
MiNi Hi-Fi COMPONENT SYSTEM
US Model
HCD-GX8800
E Model
HCD-GN700
HCD-GN700/GX8800
Ver 1.0  2003.04
9-877-280-01
Sony Corporation
2003D0200-1
Home Audio Company
C
 2003.04
Published by Sony Engineering Corporation
SPECIFICATIONS
HCD-GN700/GX8800 are the amplifier,
CD player, tape deck and tuner section
in MHC-GN700/GX8800.
– Continued on next page –
SERVICE MANUAL
Photo: HCD-GN700
AUDIO POWER SPECIFICATIONS
(MHC-GX8800 USA model only)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
With 6-ohm loads, both channels driven, from 120 Hz – 10 kHz; rates
200 watts per channel minimum RMS power, with no more than 10%
total harmonic distortion from 250 miliwatts to rated output.
Amplifier section
MHC-GX8800
Total harmonic distortion
Less than 0.1%
(6 ohms at 1 kHz, 100 W)
MHC-GN700
The following are measured at AC 127V, 60 Hz (Mexican model only)
The following are measured at AC 120, 220, 240V 50/60 Hz
(except Mexican model)
DIN power output (rated)
160 + 160 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
200 + 200 watts
(6 ohms at 1 kHz, 10% THD)
Inputs
GAME (VIDEO):
1 Vp-p, 75 ohms
(phono jack)
GAME (AUDIO):
Voltage 250 mV,
(phono jacks)
impedance 47 kilohms
MD/VIDEO (AUDIO) IN:
voltage 450 mV/250 mV,
(phono jacks)
impedance 47 kilohms
MIC:
sensitivity 1 mV,
(phone jack)
impedance 10 kilohms
Outputs
VIDEO OUT:
max. output level 1 Vp-p,
(phono jacks)
unbalanced, Sync.
negative load impedance 75 ohms
PHONES:
accepts headphones of
(stereo mini jack)
8 ohms or more
FRONT SPEAKER:
accepts impedance of 6 to 16 ohms
SURROUND SPEAKER:
accepts impedance of 24 ohms or more
CD player section
System
Compact disc and digital audio system
Laser
Semiconductor laser
(
λ
=795nm)
Laser Output
Max. 44.6 
µ
W*
*This output is the value measured at a
distance of 200 mm from the objective
lens surface on the Optical Pick-up
Block with 7 mm aperture.
Frequency response
2 Hz – 20 kHz (
±
0.5 dB)
Wave length
795 nm
CD OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)
Wave length
660 nm
Output Level
–18 dBm
HCD-GN700/GX8800
2
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing 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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
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  PUB-
LISHED  BY  SONY.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.
Tape player section
Recording system
4-track 2-channel stereo
Frequency response
50 – 13,000 Hz (
±
3 dB), using Sony
TYPE I cassette
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
87.5 – 108.0 MHz
Antenna
FM lead antenna
Antenna terminals
75 ohm unbalanced
Intermediate frequency
10.7 MHz
AM tuner section
Tuning range
North and Latin American models:
530 – 1,710 kHz
(with the interval set at 10 kHz)
531 – 1,710 kHz
(with the interval set at 9 kHz)
Middle Eastern models:
531 – 1,602 kHz
(with the interval set at 9 kHz)
Other models:
531 – 1,602 kHz
(with the interval set at 9 kHz)
530 – 1,710 kHz
(with the interval set at 10 kHz)
Antenna
AM loop antenna
Antenna terminals
External antenna terminal
Intermediate frequency
450 kHz
General
Power requirements
US model:
120 V AC, 60 Hz
Mexican models:
120 or 127 V AC, 60 Hz
Argentina models:
220 V AC, 50/60 Hz
Other models:
120 V, 220 V or
230 - 240 V AC, 50/60 Hz
Adjustable with voltage selector
Power consumption
MHC-GN700
205 watts
MHC-GX8800
220 watts
Dimensions (w/h/d)
Approx. 280 x 360 x 386.5 mm
Mass :
HCD-GN700/GX8800
Approx. 11.4 kg
Design and specifications are subject to change without notice.
To Exposed Metal 
Parts on Set
0.15 
µ
F
1.5 k
AC
Voltmeter
(0.75 V)
Earth Ground
Fig. A.  Using an AC voltmeter to check AC leakage.
    After correcting the original service problem, perform the fol-
lowing safety checks 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
    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 microampers).
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 2V AC range are suitable. (See
Fig. A)
SAFETY  CHECK-OUT
HCD-GN700/GX8800
3
TABLE  OF  CONTENTS
1.
SERVICING NOTES
................................................
4
2.
GENERAL
Location of Controls .......................................................
5
3.
DISASSEMBLY
3-1. Case .................................................................................
8
3-2. Loading (Panel) ...............................................................
8
3-3. Front Panel Assy .............................................................
9
3-4. Tuner Pack, Sub Trans Board .........................................
9
3-5. CD Mechanism Deck ...................................................... 10
3-6. Game In Board, Tape Mechanism Deck ......................... 10
3-7. CD Switch Board, Display Board .................................. 11
3-8. Volume Board .................................................................. 11
3-9. Subwoofer Board, Rear Panel ........................................ 12
3-10. Main Board ...................................................................... 12
3-11. Power Amp Board ........................................................... 13
3-12. SW Board, Driver Board ................................................. 13
3-13. CD Board, CD Block Assy ............................................. 14
3-14. Sensor Board ................................................................... 14
3-15. Motor (TB) Board ........................................................... 15
3-16. Motor (LD) Board ........................................................... 15
4.
TEST  MODE
.............................................................. 16
5.
MECHANICAL  ADJUSTMENTS
....................... 20
6.
ELECTRICAL  ADJUSTMENTS
Deck section .................................................................... 20
CD Section ...................................................................... 22
7.
DIAGRAMS
7-1. Circuit Board Location ................................................... 26
7-2. Block Diagram  – CD Servo Section – ........................... 28
Block Diagram  – Tuner/Tape Deck Section – ............... 29
Block Diagram  – Main/Power Section – ....................... 30
Block Diagram  – Display Section – .............................. 31
7-3. Printed Wiring Board  – CD Board – ............................. 32
7-4. Schematic Diagram  – CD Board – ................................ 33
7-5. Printed Wiring Board  – CD Mechanism Board – ......... 34
7-6. Schematic Diagram  – CD Mechanism Board – ............ 35
7-7. Printed Wiring Boards  – Main Board – ......................... 36
7-8. Schematic Diagram  – Main Board (1/3) – .................... 37
7-9. Schematic Diagram  – Main Board (2/3) – .................... 38
7-10. Schematic Diagram  – Main Board (3/3) – .................... 39
7-11. Printed Wiring Boards
– Game In, CD Switch Board – ...................................... 40
7-12. Schematic Diagram
– Game In, CD Switch Board – ...................................... 41
7-13. Printed Wiring Board  – Display Board – ...................... 42
7-14. Schematic Diagram  – Display Board – ......................... 43
7-15. Printed Wiring Board  – Power Amp Board – ................ 44
7-16. Schematic Diagram  – Power Amp Board – .................. 45
7-17. Printed Wiring Boards  – Trans Board – ........................ 46
7-18. Schematic Diagram  – Trans Board – ............................. 47
7-19. IC Block Diagram ........................................................... 48
7-20. IC Pin Function Description ........................................... 49
8.
EXPLODED  VIEWS
8-1. Case, Rear Panel Section ................................................ 54
8-2. Front Panel Section ......................................................... 55
8-3. Chassis Section ............................................................... 56
8-4. CD Mechanism Deck Section-1
(CDM74-K6BD47S) ....................................................... 57
8-5. CD Mechanism Deck Section-2
(CDM74-K6BD47S) ....................................................... 58
9.
ELECTRICAL  PARTS  LIST
............................... 59
4
HCD-GN700/GX8800
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 flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
LASER  DIODE  AND  FOCUS  SEARCH  OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and
check that the S curve waveforms is output three times.
• MODEL  IDENTIFICATION
– Back Panel –
MODEL
PART No.
GN700 : E2, E3models
4-244-106-0
[]
GN700 : E51 model
4-244-106-1
[]
GN8800 : US models
4-244-106-2
[]
GN700 : Mexican model
4-244-106-3
[]
GN700 : Argentina model
4-244-106-4
[]
Abbreviation
E2
: 120 V AC Area in E model
E3
: 240 V AC Area in E model
E51
: Chilean and Peruvian model
PART No.
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Sony HCD-GN700 / HCD-GX8800 / MHC-GN700 / MHC-GX8800 Service Manual ▷ Download

  • DOWNLOAD Sony HCD-GN700 / HCD-GX8800 / MHC-GN700 / MHC-GX8800 Service Manual ↓ Size: 4.66 MB | Pages: 71 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony HCD-GN700 / HCD-GX8800 / MHC-GN700 / MHC-GX8800 in PDF for free, which will help you to disassemble, recover, fix and repair Sony HCD-GN700 / HCD-GX8800 / MHC-GN700 / MHC-GX8800 Audio. Information contained in Sony HCD-GN700 / HCD-GX8800 / MHC-GN700 / MHC-GX8800 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.