DOWNLOAD Sony HCD-GX8000 / HCD-RG77 Service Manual ↓ Size: 6.84 MB | Pages: 71 in PDF or view online for FREE

Model
HCD-GX8000 HCD-RG77
Pages
71
Size
6.84 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-gx8000-hcd-rg77.pdf
Date

Sony HCD-GX8000 / HCD-RG77 Service Manual ▷ View online

2
HCD-GX8000/RG77
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.
The following caution label is located inside the unit.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.
General
Power requirements
North America and Mexican models:
120 V AC, 60 Hz
Argentina model:
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
240 watts
Dimensions (w/h/d)
Approx. 280 x 360 x 445
mm
Mass :
Approx. 11.0 kg
Design and specifications are subject to change
without notice.
SAFETY  CHECK-OUT
After correcting the original service problem, perform the follow-
ing 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” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able.  (See Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
0.15 
µ
F
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
3
HCD-GX8000/RG77
TABLE  OF  CONTENTS
1.
SERVICING NOTES
................................................
4
2.
GENERAL
Location of Controls .......................................................
5
Setting the Clock .............................................................
6
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
7
3-2. Top Case ..........................................................................
8
3-3. Loading Panel ..................................................................
8
3-4. CD Mechanism Deck ......................................................
9
3-5. Front Panel Section .........................................................
9
3-6. Back Panel Section .......................................................... 10
3-7. MAIN Board ................................................................... 10
3-8. Base Unit (BU-30BD60C) .............................................. 11
3-9. DRIVER Board, MOTOR Board and
SENSOR (CD) Board ..................................................... 11
3-10. Tape Mechanism Deck (TCM-230AWR41CS) .............. 12
3-11. Belt .................................................................................. 12
3-12. SW Board, HEAD (A) Board and HEAD (B) Board ..... 13
4.
TEST  MODE
.............................................................. 14
5.
MECHANICAL  ADJUSTMENTS
....................... 18
6.
ELECTRICAL  ADJUSTMENTS
Deck section .................................................................... 18
CD Section ...................................................................... 21
7.
DIAGRAMS
7-1. Block Diagram  – CD SERVO Section – ....................... 23
7-2. Block Diagram  – TUNER/TAPE DECK Section – ...... 24
7-3. Block Diagram  – MAIN Section – ................................ 25
7-4. Block Diagram  – DISPLAY/KEY CONTROL/
POWER SUPPLY Section – ........................................... 26
7-5. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 27
7-6. Printed Wiring Board  – BD Board – ............................. 28
7-7. Schematic Diagram  – BD Board – ................................ 29
7-8. Printed Wiring Boards
– DRIVER/MOTOR/SENSOR (CD) Boards – .............. 30
7-9. Schematic Diagram
– DRIVER/MOTOR/SENSOR (CD) Boards – .............. 30
7-10. Printed Wiring Boards
– SW/HEAD (A)/HEAD (B) Boards – .......................... 31
7-11. Schematic Diagram  – SW Board – ................................ 32
7-12. Printed Wiring Board  – MAIN Board – ........................ 33
7-13. Schematic Diagram  – MAIN Board (1/4) – .................. 34
7-14. Schematic Diagram  – MAIN Board (2/4) – .................. 35
7-15. Schematic Diagram
– MAIN (3/4)/HEAD (A)/HEAD (B) Boards – ............. 36
7-16. Schematic Diagram  – MAIN Board (4/4) – .................. 37
7-17. Printed Wiring Board  – GAME IN Board – .................. 38
7-18. Schematic Diagram  – GAME IN Board – ..................... 39
7-19. Printed Wiring Boards
– POWER/SENSOR Boards – ........................................ 40
7-20. Schematic Diagram  – POWER/SENSOR Boards – ..... 41
7-21. Printed Wiring Boards
– PANEL/CD OPEN/CD SWITCH Boards – ................ 42
7-22. Schematic Diagram
– PANEL/CD OPEN/CD SWITCH Boards – ................ 43
7-23. Printed Wiring Boards
– PAD SWITCH/VOL Boards – ..................................... 44
7-24. Schematic Diagram  – PAD SWITCH/VOL Boards – ... 45
7-25. Printed Wiring Boards
– MAIN TRANS/SUB-TRANS Boards – ...................... 46
7-26. Schematic Diagram
– MAIN TRANS/SUB-TRANS Boards – ...................... 47
7-27. IC Pin Function Description ........................................... 49
8.
EXPLODED  VIEWS
8-1. Panel Section ................................................................... 53
8-2. Front Panel Section ......................................................... 54
8-3. Chassis Section ............................................................... 55
8-4. CD Mechanism Deck Section ......................................... 56
8-5. Base Unit Section (BU-30BD60C) ................................. 57
8-6. Tape Mechanism Deck Section
(TCM-230AWR41CS) .................................................... 58
9.
ELECTRICAL  PARTS  LIST
............................... 59
Ver 1.1
4
HCD-GX8000/RG77
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.
SECTION  1
SERVICING  NOTES
• MODEL  IDENTIFICATION
– Back Panel –
MODEL
PART No.
E, Singapore, Chilean and Peruvian models
4-237-780-1
[]
Mexican and Argentina models
4-237-780-6
[]
US model
4-237-780-9
[]
PART No.
5
HCD-GX8000/RG77
SECTION  2
GENERAL
This section is extracted from
instruction manual.
LOCATION  OF  CONTROLS
–  Front Panel –
CD eg
CD SYNC HI-DUB qf
DECK A A wh
DECK B A qh
DIMMER 9
DIRECTION q;
DISC 1~3 4
DISC SKIP EX-CHANGE 5
Disc tray 3
DISPLAY 7 
EDIT q;
EFFECT ON/OFF rs 
ENTER ra
FM MODE qs
GAME ea
GAME EQ rd
GAME INPUT wd
GAME MIXING wl
GROOVE rf 
IR (receptor) 2
MD (VIDEO) es
MIC wa 
MIC LEVEL w;
MOVIE EQ ek
MUSIC EQ eh
OPEN/CLOSE Z 6
P FILE r;
PHONES (jack) ql
PLAY MODE e;
REC PAUSE/START qg
REPEAT qs
SPECTRUM 8
SURROUND el
SURROUND SPEAKER MODE
wj
TAPE A/B ed
TUNER/BAND ef 
TUNER MEMORY e;
VOLUME qa
BUTTON DESCRIPTIONS
@/1 1
hH ws
x qd
X wk
> qj
. wg
M/+  qk
m/–  wf
v/V/b/B ej
ALPHABETICAL ORDER
A - D
M - Q
1
2 3
4
5
6
7
8
9
0
K
L
M
N
O
qh
qj
qk
ql
w;
wa
ws
W
X
wg
wh
wj
wk
wl
e;
ea
es
eg
ed
ef
ej
eh
ek
el
ra r;
rd rs
rf
E - L
R - Z
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Sony HCD-GX8000 / HCD-RG77 Service Manual ▷ Download

  • DOWNLOAD Sony HCD-GX8000 / HCD-RG77 Service Manual ↓ Size: 6.84 MB | Pages: 71 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony HCD-GX8000 / HCD-RG77 in PDF for free, which will help you to disassemble, recover, fix and repair Sony HCD-GX8000 / HCD-RG77 Audio. Information contained in Sony HCD-GX8000 / HCD-RG77 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.