DOWNLOAD Sony HCD-V4800 / LBT-V4800 / LBT-V4800R Service Manual ↓ Size: 1.32 MB | Pages: 67 in PDF or view online for FREE

Model
HCD-V4800 LBT-V4800 LBT-V4800R
Pages
67
Size
1.32 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-v4800-lbt-v4800-lbt-v4800r.pdf
Date

Sony HCD-V4800 / LBT-V4800 / LBT-V4800R Service Manual ▷ View online

MINI Hi-Fi COMPONENT SYSTEM
MICROFILM
E Model
Chinese Model
SPECIFICATIONS
SERVICE MANUAL
HCD-V4800
HCD-4800 is the tuner, deck, Video CD and
amplifier section in LBT-V4800/V4800R.
CD
Section
Tape deck
Section
Model Name Using Similar Mechanism
HCD-V3500
CD Mechanism Type
CDM37L-5BD21AL
Base Unit Name
BU-5BD21AL
Optical Pick-up Name
KSS-213D/Q-NP
Model Name Using Similar Mechanism
HCD-V808
Tape Transport Mechanism Type
TCM-220WR2
*
Dolby noise reduction manufactured under
license from Dolby Laboratories
Licensing Corporation.
“DOLBY” and the double-D symbol 
a
are trademarks of Dolby Laboratories
Licensing Corporation.
– Continued on next page –
– 2 –
SAFETY-RELATED  COMPONENT  WARNING!!
COMPONENTS  IDENTIFIED  BY  MARK  
!  OR  DOTTED  LINE
WITH  MARK  
!  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 specified herein may result in hazardous ra-
diation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
The following caution label is located inside the unit.
MODEL  IDENTIFICATION
– BACK  PANEL –
MODEL
PART NO.
Singapore
4-992-219-0
π
Malaysia, Thai
4-992-219-1
π
Chinese
4-992-219-2
π
Indonesia
4-992-219-3
π
PART No.
– 3 –
TABLE OF CONTENTS
1.
GENERAL
.................................................................. 4
2.
DISASSEMBLY
......................................................... 7
3.
TEST  MODE
............................................................. 15
4.
MECHANICAL  ADJUSTMENTS
...................... 18
5.
ELECTRICAL  ADJUSTMENTS
DECK Section ................................................................. 18
CD Section ....................................................................... 21
VIDEO Section ................................................................ 22
6.
DIAGRAMS
6-1. IC Pin Function Description ............................................ 23
6-2. Printed Wiring Board —BD Section— ........................... 33
6-3. Schematic Diagram —BD Section— .............................. 35
6-4. Printed Wiring Boards —CD MOTOR Section— .......... 37
6-5. Schematic Diagram —CD MOTOR Section— ............... 39
6-6. Printed Wiring Boards —VIDEO Section— ................... 42
6-7. Schematic Diagram —VIDEO Section— ....................... 45
6-8. Schematic Diagram —DECK Section— ......................... 51
6-9. Printed Wiring Boards —DECK Section— .................... 55
6-10. Printed Wiring Boards
—MAIN/DECK/POWER SUPPLY Section— ............... 58
6-11. Schematic Diagram
—MAIN/POWER SUPPLY Section— ........................... 61
6-12. Schematic Diagram —PANEL Section— ....................... 68
6-13. Printed Wiring Boards —PANEL Section— ................... 71
6-14. Schematic Diagram
—POWER AMP/KEY CONTROL Section— ................ 74
6-15. Printed Wiring Boards
—POWER AMP/KEY CONTROL Section— ................ 77
7.
EXPLODED  VIEWS
............................................... 88
8.
ELECTRICAL  PARTS LIST
................................ 97
SERVICING NOTES
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.
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 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.
NOTES  ON  HANDLING  THE  OPTICAL  PICK-UP
BLOCK  OR  BASE  UNIT
– 4 –
1 POWER button
2 SPECTRUM ANALYZER button
3 DISPLAY/DEMO button
4 Remote control receiver
5 Fluorescent indicator tube
6 EFFECT button and indicator
7 ENTER/NEXT button and indicator
8 TUNER MEMORY button
9 TUNING MODE button
0 TUNING – button
!¡ TUNER/BAND button and indicator
!™ TUNING + button
!£ STEREO/MONO button
!¢ FUNCTION button
!∞ VOLUME control knob
!§ SUPER WOOFER button and indicator
!¶ SUPER W MODE button
!• p button (deck B side)
!ª ) button  (deck B side)
@º 0 button (deck B side)
@¡ § EJECT button (deck B side)
@™ 6 OPEN button
@£ t /CLOCK SET button
@¢ SLEEP button
@∞ REC button
@§ ) button  (deck A side)
@¶ p button (deck A side)
@• 0 button (deck A side)
@ª § EJECT button (deck A side)
#º DIRECT PLAY DISC 1 to DISC 5 buttons
#¡ ˆ RETURN button
#™ PREV button
#£ NEXT button
#¢ Cassette holder (deck A side)
#∞ CD disc tray
#§ Cassette holder (deck B side)
#¶ 0 button
#• ≠ AMS ± jog dial knob
#ª ) button
SECTION  1
GENERAL
LOCATION  OF  CONTROLS
— Front Panel —
0 !¡
9
8
7
6
5
4
3
2
1
!™

!∞


!•


@™

@∞

@•
#¡ #™ #£
#¢ #∞
#¶ #• #ª
Page of 67
Display

Sony HCD-V4800 / LBT-V4800 / LBT-V4800R Service Manual ▷ Download

  • DOWNLOAD Sony HCD-V4800 / LBT-V4800 / LBT-V4800R Service Manual ↓ Size: 1.32 MB | Pages: 67 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony HCD-V4800 / LBT-V4800 / LBT-V4800R in PDF for free, which will help you to disassemble, recover, fix and repair Sony HCD-V4800 / LBT-V4800 / LBT-V4800R Audio. Information contained in Sony HCD-V4800 / LBT-V4800 / LBT-V4800R 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.