DOWNLOAD Sony HCD-GN880 / MHC-GN880 Service Manual ↓ Size: 5.15 MB | Pages: 77 in PDF or view online for FREE

Model
HCD-GN880 MHC-GN880
Pages
77
Size
5.15 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-gn880-mhc-gn880.pdf
Date

Sony HCD-GN880 / MHC-GN880 Service Manual ▷ View online

HCD-GN880
E Model
Australian Model
SERVICE MANUAL
MiNi Hi-Fi COMPONENT SYSTEM
Sony Corporation
Home Audio Division
Published by Sony Techno Create Corporation
9-877-802-02
2006B02-1
© 2006.02
SPECIFICATIONS
Ver. 1.1  2006. 02
– Continued on next page –
• HCD-GN880 is the Amplifier,
CD player, tape deck and tuner
section in MHC-GN880.
Model Name Using Similar Mechanism
HCD-GX450
CD
CD Mechanism Type
CDM74-F1BD81
Section
Base Unit Name
BU-F1BD81A
Optical Pick-up Name
KSM-215DCP/C2NP
TAPE
Model Name Using Similar Mechanism
NEW
Section
Tape Transport Mechanism Type
CWM43RR35
Amplifier section
The following are measured at
Mexican model:
AC 127 V, 60 Hz
Other models:
AC 120, 220, 240 V, 50/60 Hz
DIN power output (rated)
180 + 180 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
225 + 225 watts
(6 ohms at 1 kHz, 10% THD)
Inputs
VIDEO/MD (AUDIO) IN (phono jacks):
voltage 250/450 mV, impedance 47
kiloohms
GAME (VIDEO) IN (phono jack):
1 Vp-p, 75 ohms
GAME (AUDIO) IN (phono jack):
voltage 250 mV, impedance 47 kiloohms
MIC (phone jack):
sensitivity 1 mV, impedance 10 kiloohms
Outputs
VIDEO OUT (phono jack):
max. output level
1 Vp-p, unbalanced, Sync
negative, load impedance 75 ohms
PHONES (stereo mini jack): accepts headphones of 8 ohms or
more
FRONT SPEAKER:
Use only the supplied speaker
SS-GN880
SURROUND SPEAKER:
Use only the supplied speaker SS-RS880
SUBWOOFER OUT:
Use only the supplied subwoofer SS-WG880
Disc player section
System
Compact disc and digital audio system
Laser
Semiconductor laser
(
λ=780 nm)
Emission duration: continuous
 Laser Output
Max. 44.6 
µW*
*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
780 – 790 nm
Signal-to-noise ratio
More than 90 dB
Dynamic range
More than 90 dB
OPTICAL CD DIGITAL OUT
Wave length
660 nm
Output Level
–18 dBm
2
HCD-GN880
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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
This appliance is classified as
a CLASS 1 LASER product.
This label is located on the rear
exterior.
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.
Tape deck section
Recording system
4-track 2-channel stereo
Frequency response
50 – 13,000 Hz (
±
3 dB), using Sony
TYPE I tape
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
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
Australian model:
230 – 240 V AC, 50/60 Hz
Mexican model:
127 V AC, 60 Hz
Other models:
120 V, 220 V or 230 – 240 V AC, 50/
60 Hz
Adjustable with voltage selector
Power consumption
350 watts
Dimensions (w/h/d) (Approx.)
280 x 360 x 394.5 mm
Mass (Approx.)
14.4 kg
Supplied accessories:
Remote Commander (1)
Batteries (2)
AM loop antenna (1)
FM lead antenna (1)
Front speaker pads (8)
Surround speaker pads (8)
Subwoofer pads (4)
Design and specifications are subject to change without notice.
3
HCD-GN880
TABLE OF CONTENTS
1.
SERVICING NOTES
................................................
4
2.
GENERAL
Location of Controls ........................................................
5
3.
DISASSEMBLY
3-1.
Disassembly Flow ...........................................................
7
3-2.
Case .................................................................................
8
3-3.
Loading Panel Assy .........................................................
8
3-4.
Front Panel Assy ..............................................................
9
3-5.
CD Mechanism Deck (CDM74-F1BD81) ......................
9
3-6.
Tape Mechanism Deck, Game Board .............................. 10
3-7.
CD Switch Board, Panel Board ....................................... 10
3-8.
Switch Board ................................................................... 11
3-9.
Tuner Pack ....................................................................... 11
3-10. Primary Board ................................................................. 12
3-11. Rear Panel ........................................................................ 12
3-12. Main Board ...................................................................... 13
3-13. Surround Board, PA Board .............................................. 13
3-14. Power Transformer .......................................................... 14
3-15. Driver Board, SW Board ................................................. 14
3-16. BD Board, Optical Pick-Up (KSM-215DCP/C2NP) ...... 15
3-17. Sensor Board ................................................................... 15
3-18. Motor (TB) Board ........................................................... 16
3-19. Motor (LD) Board ........................................................... 16
4.
TEST  MODE
.............................................................. 17
5.
MECHANICAL  ADJUSTMENTS
....................... 21
6.
ELECTRICAL  ADJUSTMENTS
Deck section .................................................................... 21
CD Section ...................................................................... 22
7.
DIAGRAMS
7-1.
Circuit Board Location .................................................... 26
7-2.
Block Diagram  – CD Section – ...................................... 28
7-3.
Block Diagram  – Tuner/Tape Deck Section – ................ 29
7-4.
Block Diagram  – Main Section – ................................... 30
7-5.
Block Diagram  – Display/Power Section – .................... 31
7-6.
Printed Wiring Board  – BD Board – .............................. 32
7-7.
Schematic Diagram  – BD Board – ................................. 33
7-8.
Printed Wiring Board  – CD Mechanism Board – ........... 34
7-9.
Schematic Diagram  – CD Mechanism Board – ............. 35
7-10. Printed Wiring Boards  – Main Board – .......................... 36
7-11. Schematic Diagram  – Main Board (1/3) – ..................... 37
7-12. Schematic Diagram  – Main Board (2/3) – ..................... 38
7-13. Schematic Diagram  – Main Board (3/3) – ..................... 39
7-14. Printed Wiring Boards
– Game, CD Switch Board – ........................................... 40
7-15. Schematic Diagram
– Game, CD Switch Board – ........................................... 41
7-16. Printed Wiring Board  – PA Board – ............................... 42
7-17. Schematic Diagram  – PA Board – .................................. 43
7-18. Printed Wiring Board  – Surround Board – ..................... 44
7-19. Schematic Diagram  – Surround Board – ........................ 45
7-20. Schematic Diagram  –Panel Board (1/2) – ...................... 46
7-21. Schematic Diagram  –Panel Board (2/2) – ...................... 47
7-22. Printed Wiring Board  – Panel Board – ........................... 48
7-23. Printed Wiring Boards  – Primary Board – ..................... 49
7-24. Schematic Diagram  – Primary Board – .......................... 50
7-25. IC Block Diagram ........................................................... 50
7-26. IC Pin Function Description ............................................ 52
8.
EXPLODED  VIEWS
8-1.
Case, Rear Panel Section ................................................. 58
8-2.
Front Panel Section ......................................................... 59
8-3.
Chassis Section ................................................................ 60
8-4.
CD Mechanism Deck Section-1
(CDM74-F1BD81) .......................................................... 61
8-5. CD Mechanism Deck Section-2
(CDM74-F1BD81) .......................................................... 62
9.
ELECTRICAL  PARTS  LIST
................................ 63
4
HCD-GN880
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 electrostatic
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 emission, 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 waveform is output several times.
• MODEL  IDENTIFICATION
– Back Panel –
MODEL
PART No.
E2, E3models
4-252-723-0[]
AUS model
4-252-723-1[]
E51 model
4-252-723-2[]
Mexican model
4-252-723-3[]
• Abbreviation
E2
: 120 V AC Area in E model
E3
: 240 V AC Area in E model
E51 : Chilean and Peruvian model
AUS : Australian model
PART No.
Page of 77
Display

Sony HCD-GN880 / MHC-GN880 Service Manual ▷ Download

  • DOWNLOAD Sony HCD-GN880 / MHC-GN880 Service Manual ↓ Size: 5.15 MB | Pages: 77 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony HCD-GN880 / MHC-GN880 in PDF for free, which will help you to disassemble, recover, fix and repair Sony HCD-GN880 / MHC-GN880 Audio. Information contained in Sony HCD-GN880 / MHC-GN880 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.