Sony HCD-GN880 User manual

HCD-GN880
E Model
Australian Model
SERVICE MANUAL
MiNi Hi-Fi COMPONENT SYSTEM
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
9-877-802-01
2004D02-1
© 2004.04
SPECIFICATIONS
Ver 1.0 2004. 04
– 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):
voltage250mV,impedance 47kiloohms
MIC (phone jack): sensitivity1 mV, impedance10 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: Useonly thesupplied speakerSS-RS880
SUBWOOFER OUT: Useonly thesupplied subwoofer SS-WG880
Disc player section
System Compactdiscand digital audiosystem
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 0OR DOTTED LINEWITH
MARK 0ON THE SCHEMATIC DIAGRAMS AND INTHE 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 VAC, 50/60 Hz
Mexican model: 127 VAC, 60 Hz
Other models: 120 V, 220 V or 230 – 240VAC, 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, PABoard .............................................. 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 HANDLINGTHE 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-
upblock.Therefore, whenchecking thelaser diodeemission, 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 VAC Area in E model
E3 : 240 VAC Area in E model
E51 : Chilean and Peruvian model
AUS : Australian model
PART No.

5
HCD-GN880
SECTION 2
GENERAL This section is extracted
from instruction manual.
LOCATINGTHE CONTROLS
Main unit
ALBUM qh
AMP MENU ek
CD eh
CD SYNC qf
Deck A wj
Deck B w;
DIRECTION qa
DISC 1 ~ 3 3
Disc tray rs
DISPLAY r;
Display 5
EFFECT ON/OFF ej
ENTERwa
EQ EDIT 8
EX-CHANGE/DISC SKIP 4
FM MODE q;
GAME e;
GAMEINPUT (jacks) wh
GAME MIXING ef
GROOVE wl
ILLUMINATION wk
MIC (jack) wg
MIC LEVEL wf
MULTI JOG ws
P FILE MEMORY 7
PHONES (jack) wd
PLAY MODE 9
Power illuminator 2
REC PAUSE/START qg
REPEAT q;
SLEEP el
SURR SPEAKER MODE ra
TAPE A/B ed
TUNER/BAND eg
TUNER MEMORY qa
TUNING MODE 9
VIDEO/MD es
VOLUME rd
?/1 (power) 1
ZOPEN/CLOSE 6
nN (play) qs
. > (gobackward/forward)qd
m M (rewind/fast forward)
qh
X(pause) ql
x(stop) qk
ZA (Eject A) ea
ZB (Eject B) qj
List of button locations and reference pages
ALPHABETICAL ORDER
A – D
E – L
M – R
S – Z
SYMBOLS
hH
A A
wgwf wdwh
qh
qk
qg qf
qj
w;
ws
ql
wa
9
qa
qd
q;
qs
78
2
eg
rs
r;
el
ra
rd
eh
ek
ej
ef
ea
wj
41 3 65
ed
es e;
wl wk

6
HCD-GN880 This section is extracted
from instruction manual.
Remote c ontrol
ALBUM + qf
ALBUM – qh
CD wf
CLEAR qk
CLOCK/TIMER SELECT 2
CLOCK/TIMER SET 4
DISC SKIP qd
DISPLAY wh
ENTER qs
EQ qj
FM MODE 6
FUNCTION 8
PLAY MODE 5
REPEAT 6
SLEEP 1
TAPE wd
TUNER/BAND 7
TUNER MEMORY wg
TUNING MODE 5
VOLUME +/– qg
?/1 (power) 3
x(stop) qa
X(pause) ql
N (play) w;
–.(go backward) ws
>+ (go forward) wa
m(rewind) q;
M(fast forward) 9
ALPHABETICAL ORDER
A – E F – Z
SYMBOLS
7
5
q;
qg
qh
qj
qk
w;
ws
wd
wg
wh
qf
qd
qs
qa
9
8
6
4
3
12
ql
wa
wf

7
HCD-GN880
SECTION 3
DISASSEMBLY
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
3-2.CASE
(Page 8)
3-3.LOADING PANEL ASSY
(Page 8)
3-4.FRONT PANEL ASSY
(Page 9)
3-14.POWER TRANSFORMER
(Page 14)
3-11.REAR PANEL
(Page 12)
3-5.CD MECHANISM DECK
(CDM74-F1BD81)
(Page 9)
3-16. BD BOARD,
OPTICAL PICK-UP
(KSM-215DCP/C2NP)
(Page 15)
3-6.TAPE MECHANISM DECK,
GAME BOARD
(Page 10)
3-15.DRIVER BOARD,
SW BOARD
(Page 14)
3-10.PRIMARY BOARD
(Page 12)
3-18.MOTOR (TB) BOARD
(Page 16)
3-19.MOTOR (LD) BOARD
(Page 16)
3-17.SENSOR BOARD
(Page 15)
3-7.CD SWITCH BOARD,
PANEL BOARD
(Page 10)
3-12.MAIN BOARD
(Page 13)
3-13.SURROUND BOARD,
PA BOARD
(Page 13)
3-8.SWITCH BOARD
(Page 11)
3-9.TUNER PACK
(Page 11)
SET

8
HCD-GN880
Note: Follow the disassembly procedure in the numerical order given.
3-2. CASE
3-3. LOADING PANEL ASSY
1 two screws
(case 3 TP2)
(M3 x 8)
2 screw
(case 3 TP2) (M3 x 12)
3 five screws
(+BVTT3 x 6)
7 case
6
5
1
two screws
(case 3 TP2) (M3 x 8)
2 screw (case 3 TP2
)
(M3 x 12)
4 two screws
(+BVTT3 x 6)
CD mechanismdeck (CDM74-F1BD81)
1 Turn the pulley to the arrow direction.
Front side
Pulley
4 loading panel assy
3
2
Pull out disc tray

9
HCD-GN880
3-4. FRONT PANEL ASSY
3-5. CD MECHANISM DECK (CDM74-F1BD81)
3 screw (BVTP3 x 10)
2 five screws (BVTP3 x 10)
9 front panel ASSY
6 from CN801 on GAME board
5 from deck B head
CN508
CN509
7 from deck A head
8 from CN802 on
GAME board
1 two wires
(flat type)
3 screw (BVTP3 x 10)
4 fcrew (BVTP3 x 10
)
MAIN board
4 CD mechanism deck
2 wire (flat type) (27 core)
1 two screws (BVTP3 x 10
)
3 CN701
MAIN board
CN201

10
HCD-GN880
3-6.TAPE MECHANISM DECK, GAME BOARD
3-7. CD SWITCH BOARD, PANEL BOARD
2 tape mechanism deck
3 three screws
(+BVTP2.6 x 8)
1 five screws
(+BVTP2.6 x 8)
6 GAME board
5 knob (MIC)
4 bracket (MIC
)
1 five screws
(+BVTP2.6 x 8)
9 wire (flat type) (19 core)
from CN902
7 PANEL board
5 nineteen screws
(+BVTP2.6 x 8)
2 CD SWITCH board
3 knob (VOL)
6 claw
4 CN903
8 CN907