Sony HCD-GN88D User Manual
HCD-GN88D
SERVICE MANUAL
Ver 1.3 2004.06
HCD-GN88D is the amplifier, DVD
player, tape deck and tuner section in
MHC-GN88D.
Model Name Using Similar Mechanism NEW
DVD
Section
TAPE
Section Tape Transport Mechanism Type CWM43RR23
DVD Mechanism Type CDM74D-DVBU23
Base Unit Name DVBU23
Optical Pick-up Name TDP022W
Model Name Using Similar Mechanism HCD-GN800
E Model
Australian Model
Amplifier section
The following are measured at AC 120, 127, 220, 240V 50/60 Hz
DIN power output (rated)
Front speaker: 185 + 185 watts
(6 ohms at 1 kHz, DIN)
Center speaker: 50 watts
(8 ohms at 1 kHz, DIN)
Surround speaker: 50 + 50 watts
(8 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
Front speaker: 235 + 235 watts
(6 ohms at 1 kHz, 10% THD)
Center speaker: 70 watts
(8 ohms at 1 kHz, 10% THD)
Surround speaker: 70 + 70 watts
(8 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
SPECIFICATIONS
Outputs
AUDIO OUT: Voltage 250 mV
(phono jacks) impedance 1 kilohms
VIDEO OUT: max. output level 1 Vp-p,
(phono jack) unbalanced, Sync.
negative load impedance
75 ohms
COMPONENT VIDEO
OUT: Y: 1 Vp-p, 75 ohms
PB/CB: 0.7 Vp-p, 75 ohms
PB/CR: 0.7 Vp-p, 75 ohms
S VIDEO OUT
(4-pin/mini-DIN jack): Y: 1 Vp-p, unbalanced,
Sync negative
C: 0.286 Vp-p load
impedance 75 ohms
PHONES: accepts headphones of
(stereo mini jack) 8 ohms or more
FRONT SPEAKER: accepts impedance of 6 to 16 ohms
SUBWOOFER OUT: Voltage 250 mV
(phono jack) impedance 1 kilohms
SURROUND SPEAKER: accepts impedance of
8 ohms to 16 ohms
CENTER SPEAKER: accept impedance of
8 ohms to 16 ohms
– Continued on next page –
9-877-457-04 Sony Corporation
2004F02-1 Home Audio Company
C 2004.06 Published by Sony Engineering Corporation
MiNi Hi-Fi COMPONENT SYSTEM
HCD-GN88D
Disc player section
Laser Semiconductor laser
(DVD: λ = 650 nm, CD: λ = 780 nm)
Emission duration: continuous
Frequency response DVD (PCM 48 kHz): 2 Hz – 22 kHz = (±1dB)
CD: 2 Hz – 20 kHz (±0.5 dB)
Video color system format NTSC, PAL
(except Latin American models)
DVD DIGITAL OUT (OPTICAL)
(Square optical connector jack, rear panel)
Wave length 660 nm
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)
Saudi Arabian 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
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 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.
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.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.
General
Power requirements
Mexican models: 127 V AC, 60 Hz
Argentina models: 220 V AC, 50/60 Hz
Australia models: 230 - 240 V AC, 50/60 Hz
Saudi Arabian Models: 120 - 127 V, 220 V or 230 - 240 V AC, 50/60 Hz
Adjustable with voltage selector
Thai 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 320 watts
Dimensions (w/h/d) Approx. 280 x 360 x 386.5 mm
Mass : Approx. 15.2 kg
Design and specifications are subject to change without notice.
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.
Unleaded solder
Boards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40°C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to
be applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set
to about 350°C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder
may also be added to ordinary solder.
2
TABLE OF CONTENTS
HCD-GN88D
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. DVD 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. Back Panel, Subwoofer Board ........................................ 12
3-10. Main Board ...................................................................... 12
3-11. Power Amp Board ........................................................... 13
3-12. Video Board, DMB03 Board, Regulator Board ............. 13
3-13. SW Board, Driver Board ................................................ 14
3-14. RF Board, Pick-up Unit .................................................. 14
3-15. Sensor Board ................................................................... 15
3-16. Motor (TB) Board ........................................................... 15
3-17. Motor (LD) Board ........................................................... 16
4. TEST MODE .............................................................. 17
5. MECHANICAL ADJUSTMENTS ....................... 19
6. ELECTRICAL ADJUSTMENTS
Deck section .................................................................... 19
Video Section .................................................................. 22
7. DIAGRAMS
7-1. Circuit Board Location ................................................... 24
7-2. Block Diagram – DVD DSP (1/2) Section – ................ 26
Block Diagram – DVD DSP (2/2) Section – ................ 27
Block Diagram – Tuner/Tape Deck Section – ............... 28
Block Diagram – Main Section – .................................. 29
Block Diagram – Amp Section – ................................... 30
Block Diagram – Display Section – .............................. 31
7-3. Printed Wiring Board – RF Board – .............................. 32
7-4. Schematic Diagram – RF Board – ................................. 33
7-5. Printed Wiring Board – DVD Mechanism Board – ...... 34
7-6. Schematic Diagram – DVD Mechanism Board – ......... 35
7-7. Printed Wiring Board – DMB03 Board (Side A)– ........ 36
Printed Wiring Board – DMB03 Board (Side B)– ........ 37
7-8. Schematic Diagram – DMB03 Board (1/8) –................ 38
7-9. Schematic Diagram – DMB03 Board (2/8) –................ 39
7-10. Schematic Diagram – DMB03 Board (3/8) – ................ 40
7-11. Schematic Diagram – DMB03 Board (4/8) – ................ 41
7-12. Schematic Diagram – DMB03 Board (5/8) – ................ 42
7-13. Schematic Diagram – DMB03 Board (6/8) – ................ 43
7-14. Schematic Diagram – DMB03 Board (7/8) – ................ 44
7-15. Schematic Diagram – DMB03 Board (8/8) – ................ 45
7-16. Printed Wiring Board – Video, Regulator Board – ....... 46
7-17. Schematic Diagram – Video, Regulator Board – .......... 47
7-18. Printed Wiring Boards – Main Board – ......................... 48
7-19. Schematic Diagram – Main Board (1/4) – .................... 49
7-20. Schematic Diagram – Main Board (2/4) – .................... 50
7-21. Schematic Diagram – Main Board (3/4) – .................... 51
7-22. Schematic Diagram – Main Board (4/4) – .................... 52
7-23. Printed Wiring Boards
– Game In, CD Switch Board – ...................................... 53
7-24. Schematic Diagram
– Game In, CD Switch Board – ...................................... 54
7-25. Printed Wiring Board – Display Board – ...................... 55
7-26. Schematic Diagram – Display Board – ......................... 56
7-27. Printed Wiring Board – Power Amp Board – ................ 57
7-28. Schematic Diagram – Power Amp Board – .................. 58
7-29. Printed Wiring Board – Surround Board – .................... 59
7-30. Schematic Diagram – Surround Board – ....................... 60
7-31. Printed Wiring Boards – Trans Board – ........................ 61
7-32. Schematic Diagram – Trans Board – ............................. 62
7-33. IC Block Diagram ........................................................... 63
7-34. IC Pin Function Description ........................................... 68
8. EXPLODED VIEWS
8-1. Case, Back Panel DMB03 Board Section ...................... 79
8-2. Front Panel Section ......................................................... 80
8-3. Chassis Section ............................................................... 81
8-4. DVD Mechanism Deck Section-1
(CDM74D-DVBU43) ..................................................... 82
8-5. DVD Mechanism Deck Section-2
(CDM74D-DVBU43) ..................................................... 83
9. ELECTRICAL PARTS LIST ............................... 84
3
HCD-GN88D
Ver 1.3
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 waveforms is output three times.
NOTES ON DMB03 BOARD EXCHANGE
If a DMB03 board is exchanged, “DRIVE AUTO ADJUSTMENT”
may be unable to be performed. In this case, initialize a memory in
the following procedure.
1. Starting Test Mode (see Supplement-1 page 2).
2. Press the 2 button of remote commander to set the Drive
Manual Operation (see Supplement-1 page 4).
3. Press the 6 button of remote commander to set the Memory
Check (see Supplement-1 page 6).
4. Press the [CLEAR] button of remote commander to initialize
a memory.
• MODEL IDENTIFICATION
– Back Panel –
PA RT No.
MODEL PART No.
E3, E15 models 4-246-186-0[]
SP model 4-246-186-1[]
MY model 4-246-186-2[]
EA model 4-246-186-3[]
E51 model 4-246-186-4[]
MX model 4-246-186-5[]
TH model 4-246-186-6[]
AUS model 4-246-186-7[]
PH model 4-246-186-8[]
• Abbreviation
AUS : Australian model
E3 : 240 V AC Area in E model
EA : Saudi Arabia model
E15 : Iran model
E51 : Chilean and Peruvian model
MX : Mexican model
PH : Philippines model
SP : Singapore model
MY : Malaysia model
TH : Thai model
DVD TRAY LOCK MODE
• This mode let you lock the disc trays. When this mode is acti-
vated, the disc tray will not open when
[DISC SKIP/EX-CHANGE] button is pressed. The mes-
ton or
sage “LOCKED” will be displayed in the will be displayed on
the fluorescent indicator tube.
Procedure:
1. Press
2. Select DVD function.
3. Press x button and
and hold down until “LOCKED” or “UNLOCKED” displayed
on the fluorescent indicator tube (around 5 seconds).
button to turn the set ON.
?/1
OPEN/CLOSE
Z
OPEN/CLOSE
Z
button simultaneously
but-
4
Main unit
ALPHABETICAL ORDER
SECTION 2
GENERAL
HCD-GN88D
This section is extracted from
instruction manual.
A - D
ALBUM +/– qg
AMP MENU rh
CD SYNC qk
DECK A e;
DECK B wf
DIRECTION 9
DISC 1~3 3
DISC SKIP EX-CHANGE 4
Disc tray 6
DISPLAY rf
Display 2
DVD rd
DVD MENU qj
DVD TOP MENU 9
E - G
ECHO LEVEL wh
EFFECT ON/OFF rj
FM MODE 8
GAME el
GAME EQ ed
GAME INPUT (jacks) wl
GAME MIXING ej
GROOVE eg
H - M
ILLUMINATION ea
IR (receptor) rg
KARAOKE/MPX eh
MD (VIDEO) r;
MIC (jack) wk
MIC LEVEL wj
MOVIE EQ qh
MULTI CHANNEL DECODING
(indicator) rk
MUSIC EQ ek
O - R
OPEN/CLOSE Z 5
P FILE ws
PHONES (jack) wg
PLAY MODE 7
Power illuminator es
PUSH ENTER q;
REC PAUSE/START ql
REPEAT 8
S - Z
SOUND FIELD wa
TAPE A/B ra
TUNER/BAND rs
TUNER MEMORY 7
VOLUME wd
rk
j
r
r
h
g
r
rf
rd
s
r
ra
r;
e
l
ek
ej
eh
eg
ef
ed
es
ea
e;
1
2 3
SYMBOLS
@/1 (power) 1
hH (play) qa
x (stop) qs
X (pause) qd
– . (go backward) qf
> + (go forward) qf
m (rewind) qg
M (fast forward) qg
V/v/B/b q;
A A (Deck A) ef
A B (Deck B) w;
4 5 6
7
9
qa
qd
qg
qj
q
wa
wd
8
0
qs
qf
qh
qk
l
w;
ws
wf
wl
wk
wj
wh
wg
5
HCD-GN88D
Remote Control
ALPHABETICAL ORDER
This section is extracted from
instruction manual.
A - D
ALBUM +/– eg
AMP MENU rd
ANGLE wd
AUDIO wf
CLEAR qd
CLOCK/TIMER SELECT 2
CLOCK/TIMER SET 3
D.SKIP qa
DISPLAY rf
DVD rk
DVD DISPLAY rs
DVD MENU ed
DVD SETUP r;
DVD TOP MENU ef
E - N
EFFECT ON/OFF wa
ENTER ea
GAME rj
GAME EQ e;
GAME MIXING rh
GROOVE ql
KEY CONTROL #/2 wj
MD (VIDEO) rg
MUSIC EQ es
MOVIE EQ wg
NEXT ej
Numeric button q;
O - S
P FILE wk
PLAY MODE qf
PRESET + ej
PRESET – ek
PREV ek
REPEAT qs
RETURN O el
SELECT qg
SOUND FIELD w;
SUBTITLE ws
SLOW / qj
SLEEP 1
T - Z
TAPE A/B 6
TUNER BAND rl
TUNING +/– eh
TV CH +/– 8
TV VOL +/– 7
TV/VIDEO 9
TV :/1 4
VOL +/– wh
rl
rk
rj
rh
rg
rf
rd
rs
ra
r;
el
ek
ej
eh
eg
ef
ed
es
ea
e;
SYMBOLS
@/1 (power) 5
x (stop) qk
X (pause) qh
nN (play) qg
> (go backward) ej
. (go forward) ek
M/m (fast forward/
M/m/</, wl
>10 ra
12345
7
9
qa
qd
qg
qj
ql
wa
wd
wg
wj
wl
rewind) eh
6
8
0
qs
qf
qh
qk
w;
ws
wf
wh
wk
6
• This set can be disassembled in the order shown below.
SET
CASE
LOADING (PANEL)
FRONT PANEL ASSY
HCD-GN88D
SECTION 3
DISASSEMBLY
DVD MECHANISM DECK
VIDEO BOARD,
DMB03 BOARD,
REGULATOR
BOARD
TUNER PACK,
SUB TRANS BOARD
BACK PANEL
SURROUND BOARD
MAIN BOARD
POWER AMP BOARD
GAME IN BOARD,
TAPE MECHANISM DECK
CD SWITCH BOARD,
DISPLAY BOARD
VOLUME BOARD
SW BOARD,
DRIVER BOARD
RF BOARD,
PICK-UP UNIT
7
HCD-GN88D
)
Note: Follow the disassembly procedure in the numerical order given.
3-1. CASE
7
Case
Catcher
5
Slightly push down
the edge of front panel
not to break the catcher.
1
Three screws
(case 3 TP2)
2
Five screws
(+BVTT3 x 6)
6
4
3
Two screws
(+BVTT3 x 6
3-2. LOADING (PANEL)
CD mechanismdeck (CDM74-K6BD47S)
1
Turn the pulley to the arrow direction.
Pulley
Front side
Pull out disc tray
2
3
1
Three screws
(case 3 TP2)
4
Loading (panel)
8
3-3. FRONT PANEL ASSY
d
)
8
3
Screw (BVTP3 x 10)
Front panel ASSY
1
(flat type)
7
From CN607 on
Game in board
HCD-GN88D
Two wires
MAIN boar
CN402
CN304
3-4. TUNER PACK, SUB TRANS BOARD
1
Wire (flat type)
(11 core)
4
CN971
8
Sub trans board
3
Screw (BVTP3 x 10)
2
Four screws (BVTP3 x 10)
3
Tuner pack
5
From CN606 on Game in board
6
From deck A head
4
From deck B head
2
Two screw (BVTP3 x 10)
7
Three screws
(BVTP3 x 10
6
CN976
5
CN974
9
HCD-GN88D
)
3-5. DVD MECHANISM DECK
qa
Connector
qs
DVD mechanism deck
8
Connector
(CN714)
6
Connector
(CN710)
5
Connector
(CN711)
4
Wire (flat type) (20 core)
3
Two screws (BVTP3 x 10)
1
Three screws
(BVTP3 x 10)
2
Three screws
(BVTT3 x 6)
CN206
CN202
CN203
9
Connector
(CN713)
q;
Connector
7
Wire (flat type)
(7 core)
3-6. GAME IN BOARD, TAPE MECHANISM DECK
8
Tape mechanism deck
2
Screw (+PTT2 x 4)
7
Three screws
(+BVTP2.6 x 8)
CN201
MAIN board
4
Two screws (+BVTP2.6 x 8)
2
Screw (+PTT2 x 4)
3
Two screws
(+BVTP2.6 x 8
Shield plate (GHX)
10
1
Two knobs (MIC)
6
GAME IN board
5
Two screws
(+BVTP2.6 x 8)
3-7. CD SWITCH BOARD, DISPLAY BOARD
)
1
Six screws
(+BVTP2.6 x 8)
2
CD SWITCH board
4
Five screws
(+BVTP2.6 x 8)
3
Wire (flat type) (17 core)
from CN604
5
DISPLAY board
HCD-GN88D
4
Five screws
(+BVTP2.6 x 8)
3-8. VOLUME BOARD
1
Knob (VOL)
5
VOLUME board
4
Four claws
3
Three screws
(+BVTP2.6 x 8)
3
Three screws
(+BVTP2.6 x 8
2
Hexagonal nut
11
HCD-GN88D
3-9. BACK PANEL, SUBWOOFER BOARD
qa
Screw
(+BVTP3 x 10)
qd
SURROUND board
CN303
qs
Bracket (IC)
q;
Two screws
(+BVTP3 x 16)
8
Connector
CN304
9
Connector
6
Back panel
with fan
7
Connector
1
Two screws
(+BVTT3 x 6)
2
Two screws
(+BVTP3 x 10)
3
Four screws
(+BVTP3 x 10)
4
Three screws
(+BVTP3 x 10)
3-10. MAIN BOARD
1
Connector
CN998
TRAN board
MAIN board
CN205
5
Connector
CN851
MAIN board
(CN901, 902)
4
POWER AMP board
(CN503, 504)
5
6
MAIN board
12
Lug
2
Screw
(+BVTP3 x 10)
3
Two screws
(+BVTP3 x 10)
3-11. POWER AMP BOARD
k
3
Bracket (HS)
2
Two screws
(+BVTP3 x 10)
1
Connector
from CN997
6
Two screws
(+BVTP3 x 10)
4
Two screws
(+BVTP3 x 10)
5
Three screws
(+BVTP3 x 10)
7
POWER AMP board
HCD-GN88D
3-12. VIDEO BOARD, DMB03 BOARD, REGULATOR BOARD
2
(CN712, CN105)
qs
Tw o
screws
(BVTT 3
qd
REGULATOR
board
×
4
6)
1
3
Three
(BVTP 3
VIDEO board
screws
5
(CN102)
Flat type wire (CN208)
×
8)
Connector
Flat type wire
8
Tw o
(BVTP 3
screws
×
8)
9
Tw o
screws
(BVTP 3
0
(DVD)
7
Flat type wire (CN107)
qa
DMB03 board
×
8)
Heat sin
6
Flat type wire (CN501)
DVD mechanism deck
(bottom view)
13
HCD-GN88D
)
)
3-13. SW BOARD, DRIVER BOARD
5
SW board
1
Screw
(+BVTP 3x8)
6
4
Screw
(+BTTP (M2.6))
CN704
0
CN702
(flat type)
7
CN703
8
Tw o
screws
(+BTTP (M2.6))
9
DRIVER board
3-14. RF BOARD, PICK-UP UNIT
8
Step
screw (M)
qa
Insulator
3
Bracket DVD
7
2
Two
screws
(+BVTP 3x8)
9
Step
qs
Insulator
qf
Pick-up unit
0
Step
Insulator
qd
1
Screw
(+BVTP 3x8
screw (M)
screw (M)
14
1
Flat type wire
5
RF board
6
Floating
qg
Holder (DBU) assy
3
Flat type wire
4
Flat type wire
2
Tw o screws (+BTTP 2.6)
screw (PTPWH M2.6
3-15. SENSOR BOARD
2
Tray
1
Floating
(+PTPWH M2.6)
6
Floating
(+PTPWH M2.6)
7
Gear (geneva)
screw
8
Screw
(+BTTP (M2.6))
screw
9
SENSOR board
0
CN731
3
Belt (table)
4
Foating
(+PTPWH M2.6)
5
screw
Pulley (table)
HCD-GN88D
3-16. MOTOR (TB) BOARD
1
6
Table motor ASSY (M741)
2
CN742 (flat type)
4
MOTOR (TB) board
5
Remove the two solderings of motor.
3
Two
screws
(+BTTP (M2.6))
15
HCD-GN88D
3-17. MOTOR (LD) BOARD
4
Remove the two solderings of motor.
5
Loading motor ASSY (M751)
2
Two
screws
(+BTTP (M2.6))
3
MOTOR (LD) board
1
Belt (loading)
16
SECTION 4
TEST MODE
HCD-GN88D
[GC TEST MODE]
• This mode is used to check the fluorescent indicator tube, LED,
model, destination, software version, volume, key and VACS
level.
Procedure:
1. Press x button, [AMP MENU] button and [DISC 2] button
simultaneously.
2. All LEDs and segments in fluorescent indicator tube are lighted
up.
3. When you want to enter the software version display mode,
press
[DISC 1] button. The model and destination are displayed.
4. Each time
MC version, GC version, CD version, ST version, TA version,
TM version and TC version in this order, and returns to the MC
version display.
5. When
are being displayed except model and destination, the date of
the software creation appear. When
again, the display returns to the software version display. When
[DISC 1] button is pressed, the display changes from
[DISC 3] button is pressed while the version numbers
[DISC 3] button is pressed
[DISC 1] button is pressed while the date of the software creation
is being displayed, the date of the software creation is displayed
in the same order of software version display.
6. Press
7. In the key check mode, the fluorescent indicator tube displays
8. When
9. When
10. To release this mode, press three buttons in the same manner as
[DISC 2] button, the key check mode is activated.
“K 0 V 0”.
Each time a button is pressed, “K” value increases. However,
once a button has been pressed, it is no longer taken into account.
“V” value increases in the manner of 0,1, 2, 3 ... if
knob is turned clockwise, or it decreases in the manner of 0, 9,
8,7 ... if
[VOLUME] knob is turned counter-clockwise.
[VOLUME]
[DISC 3] button is pressed after all LEDs and segments
in fluorescent indicator tube light up, the fluorescent indicator
tube displays “VACS A + B”. A is VACS level which is trigger
by signal level while B is VACS level which is trigger by thermal.
Total VACS value would be the sum of A and B.
[DISC SKIP/EX-CHANGE] button is pressed after all
LEDs and segments in fluorescent indicator tube light up,
alternate segments in fluorescent indicator tube would light up.
If you press
half of alternate segments in fluorescent indicator tube would
light up. Pressing
would case all segments lights up.
step 1, or disconnect the power cord.
[DISC SKIP/EX-CHANGE] button again, another
[DISC SKIP/EX-CHANGE] button again
[MC TEST MODE]
• This mode is used to check operations of the respective sections
of Amplifier, Tuner, and Tape.
Procedure:
* To enter MC Test Mode
1. Press x button, [AMP MENU] button and [DISC 3] button
simultaneously.
2. The TAPE A and TAPE B segments flash on the fluorescent
indicator tube. The function is changed to VIDEO.
* Check of Amplifier
1. When V button is pressed, GEQ increases to its maximum and
a message “GEQ MAX” appears on the fluorescent indicator
tube.
2. When v button is pressed, GEQ decreases to its minimum and
a message “GEQ MIN” appears on the fluorescent indicator
tube.
3. When B button or b button is pressed, GEQ is set to flat and
a message “GEQ FLAT” appears on the fluorescent indicator
tube.
4. When the
the sound volume increases to its maximum and a message
“VOLUME MAX” appears for two seconds, then the display
returns to the original display.
5. When the
slightly, the sound volume decreases to its minimum and a
message “VOLUME MIN” appears for two seconds, then the
display returns to the original display.
* Check of clock frequency
1. To check the frequency of clock used to run the clock of the
system, the clock output is available at IC501 pin el (CLOCK-
OUT) on the MAIN board during MC test mode.
2. The frequency is 32.768 kHz.
* Tape function
1. When a tape is inserted in Deck B and recording is started, the
function is changed to VIDEO automatically. When
button is pressed during recording in function, ALC (Automatic
Logic Control) is turned on.
2. After recording is stopped by pressing x button, press
button will change the function to TAPE B and rewind Tape B
until the recording start position and playback of Tape B is
started. If the
pause and pressed again to resume recording during recording
time, when tape deck B is rewind, tape deck B will be rewind
until the position where the pause is applied.
* AMS Test Mode
1. Select the function “TAPE A” or “TAPE B”.
2. Select Loop or Relay direction mode by pressing the
[VOLUME] knob is turned clockwise even slightly,
[VOLUME] knob is turned counter-clockwise even
[CD SYNC]
m
[REC PAUSE/ START] button is pressed for a
[DIRECTION] button. Insert a test tape AMS-110A or AMS-
120 to selected tape deck.
3. Press the
4. After the test tape is rewind to the beginning of the tape, the
AMS+ is checked, and the mechanism is shut off after detecting
the AMS signal twice.
5. Then the AMS- is checked and the mechanism is shut off after
detecting the AMS signal twice.
6. When the check is complete, a message of either OK or NG
appears.
* To release MC Test mode.
1. To release this mode, press
2. The cold reset is enforced at the same time.
[AMP MENU] button to enter the AMS test mode.
button.
?/1
17
HCD-GN88D
[COLD RESET]
• The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning
the set to the customer.
Procedure:
1. Press x button, [AMP MENU] button, and
simultaneously.
2. The fluorescent indicator tube becomes blank for a while, and
the set is reset.
?/1
button
[VACS ON/OFF]
• This mode is used to switch ON and OFF the VACS (Variable
Attenuation Control System).
Procedure:
1. Press
2. Press
simultaneously. The message “VACS OFF” or “VACS ON”
appears.
button to turn the set ON.
?/1
[AMP MENU] button and [GAME MIXING] button
[TUNER STEP CHANGE]
• The step interval of AM channels can be toggled between 9 kHz
and 10 kHz.
Procedure:
1. Press
2. Press
3. Press
4. Press [AMP MENU] button and
The system will turn ON automatically. The message “AM 9k
STEP” or AM 10k STEP” appears and thus the channel step is
changed.
button to turn the set ON.
?/1
[TUNER/BAND] button to select the “AM”.
button to turn the set OFF.
?/1
button simultaneously.
?/1
[DVD SHIP MODE (WITHOUT MEMORY CLEAR)]
• This mode moves the optical pick-up to the position durable to
vibration. Use this mode when returning the set to the customer
after repair.
Procedure:
1. Press
2. Select DVD function.
3. Press [DVD] button and
will power off automatically.
4. After the “STANDBY” blinking display finish, a message
“LOCK” is displayed on the fluorescent indicator tube and the
DVD ship mode is set.
button to turn the set ON.
?/1
button simultaneously. The set
?/1
[DVD POWER MANAGE]
• This mode let you switch on or off power supply to the BU
during TUNER function.
• When DVD POWER is set to OFF, the power supply to the BU
is cut off during TUNER function. It will increase the time taken
to access DVD when function change from TUNER to DVD
but it will improve tuner reception.
• When DVD POWER is set to ON, the power supply to the BU
is not cut off during TUNER function. It will reduce the time
taken to access DVD when function change from TUNER to
DVD but it will decrease tuner reception performance.
Procedure:
1. Press
2. Select DVD function.
3. Press
4. Press x button and
power on automatically.
5. The message “DVD POWER ON” or “DVD POWER OFF”
will be displayed on the fluorescent indicator tube.
button to turn the set ON.
?/1
button to turn the set OFF.
?/1
?/1
button simultaneously. The set will
[DVD REPEAT 5 LIMIT OFF MODE]
• The number of repeat for DVD playback is 5 times when the
repeat mode is “REPEAT ALL”. This mode enables DVD to
repeat playback for limitless times.
Procedure:
1. Press
2. Select CD function.
3. Press x button, [REPEAT] button and [DVD] button
simultaneously to enter the DVD repeat 5 limit off mode.
4. To release this mode, operate the cold reset. (Refer to the “MC
COLD RESET”)
button to turn the set ON.
?/1
[DVD SHIP MODE (WITH MEMORY CLEAR)]
• This mode moves the optical pick-up to the position durable to
vibration and clears all data including preset data stored in the
RAM to initial conditions. Use this mode when returning the
set to the customer after repair.
Procedure:
1. Press
2. Select DVD function.
3. Press x button, [AMP MENU] button and [GAME] button
simultaneously. The set will power off automatically.
4. After the “STANDBY” blinking display finish, a message
“LOCK” is displayed on the fluorescent indicator tube and the
DVD ship mode is set.
button to turn the set ON.
?/1
[DVD TRAY LOCK MODE]
• This mode let you lock the disc trays. When this mode is acti-
vated, the disc tray will not open when
[DISC SKIP/EX-CHANGE] button is pressed. The mes-
ton or
sage “LOCKED” will be displayed in the will be displayed on
the fluorescent indicator tube.
Procedure:
1. Press
2. Select DVD function.
3. Press x button and
and hold down until “LOCKED” or “UNLOCKED” displayed
on the fluorescent indicator tube (around 5 seconds).
button to turn the set ON.
?/1
OPEN/CLOSE
Z
OPEN/CLOSE
Z
button simultaneously
but-
[MD/VIDEO SWITCHING]
• This mode let you switch from MD to VIDEO and vice-versa.
Procedure:
1. Press
2. Select MD function.
3. Press [MD $VIDEO%] button and
The function will change to VIDEO. Press the same buttons
again to change from VIDEO to MD.
button to turn the set ON.
?/1
button simultaneously.
?/1
18
HCD-GN88D
SECTION 5
MECHANICAL ADJUSTMENTS
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads pinch rollers
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head
demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Torque Measurement
Mode
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Tor que meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Meter reading
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
6.96 N • m to 14.02 N • m
71 to 143 g • cm
(0.98 – 1.99 oz • inch)
9.80 N • m
100 g or more
(3.53 oz or more)
9.80 N • m
100 g or more
(3.53 oz or more)
SECTION 6
ELECTRICAL ADJUSTMENTS
DECK SECTION
1. Demagnetize the record/playback head with a head
demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
parts adjust.
4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
5. The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit
adjustment.)
6. The adjustments should be performed for both L-CH and RCH.
7. Switches and controls should be set as follows unless otherwise
specified.
•Test Tape
Tape Signal Used for
P-4-A100 10 kHz, –10 dB Azimuth Adjustment
WS-48B 3kHz, 0dB Tape Speed Adjustment
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
DECK A DECK B
Note: Perform this adjustments for both decks
Procedure:
1. Mode: Playback
test tape
P-4-A100
(10 kHz, –10 dB)
0 dB=0.775 V
MAIN board
CN301
Pin
1
3
Pin
set
MAIN board
CN301
2
Pin
(L-CH)
(R-CH)
(GND)
level meter
+
–
19
HCD-GN88D
e
set
MAIN board
AUDIO OUT jack (J730)
L-CH, R-CH
+
–
frequency counter
test tape
WS-48B
(3 kHz, 0 dB)
t
2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
Output
level
within
1dB
L-CH
peak
R-CH
peak
within
1dB
Screw
position
L-CH
peak
Screw
position
R-CH
peak
3. Mode: Playback
test tape
P-4-A100
(10 kHz, –10 dB)
L-CH
MAIN
board
CN301
set
R-CH
pin
L
R
pin
1
pin
3
2
oscilloscop
H
V
Tape Speed Adjustment
DECK B
Procedure:
Mode: Playback
1. Insert the WS-48B into the deck B.
2. Press the H button on the deck B.
3. Adjust the tape speed adjustment control inside motor so that
frequency counter reads 3,000 ± 90Hz.
Sample value of wow and flutter W.RMS (JIS) less than 0.3%
WS-48B
Adjustment Location:
Tape speed Adjustment
waveform of oscilloscope
in phase 45°90°135°180
good
wrong
°
4. After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
Tape speed adjustmen
control inside motor
20
forward
reverse
HCD-GN88D
set
MAIN board
MD/VIDEO (AUDIO) IN (J117)
315 Hz, 50 mV (–23.8 dB)
blank tape
CS-123
600
Ω
attenuator
AF OSC
+
–
set
recorded
portion
MAIN board
CN301 Pin
2
(GND)
MAIN board
CN301
Pin
1
(L-CH)
Pin
3
(R-CH)
level meter
REC BIAS ADJUSTMENT DECK B
Procedure:
In the MC test mode, the “REC memory mode” is convenient for
this adjustment. In the “REC memory mode” , when the REC starts
the input signal FUNCTION is switched to VIDEO automatically.
When the REC stops, the tape returns near to the recording start
position.
1. Press MD (VIDEO) button to select VIDEO. (This step is not
necessary if the above test mode has already been set)
2. Insert a tape into deck B.
3. After press [REC PAUSE/START] button, press [REC PAUSE/
START] button, then recording start.
4. Mode: Record
MAIN board
MD/VIDEO (AUDIO) IN (J117)
1) 315 Hz
AF OSC
2) 10 kHz
attenuator
5. Mode: Playback
recorded
portion
600
MAIN board
CN301
1
Pin
Pin
3
set
MAIN board
CN301 Pin
50 mV (–23.8 dB)
Ω
set
2
(GND)
level meter
+
–
(L-CH)
(R-CH)
blank tape
CN-123
4. Mode: Record
5. Mode: Playback
6. Confirm the play back signal recorded in step 3 becomes
adjustable level as follows.
If these levels are not adjustable level, adjust the RV301 (LCH) and RV351 (R-CH) on the MAIN board to repeat steps 4
and 5.
Adjustable level:
CN301 PB level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
– MAIN BOARD (Component Side) –
6. Confirm the playback signal recorded in step 3 becomes
adjustable level as follows.
If these levels are not adjustable level, adjust the RV304 (LCH) and RV354 (R-CH) on the MAIN board to repeat steps 4
and 5.
Adjustable level: Playback output of 315 Hz to playback output
Adjustment Location: MAIN board
REC LEVEL ADJUSTMENT DECK B
Procedure:
In the MC test mode, the “REC memory mode” is convenient for
this adjustment. In the “REC memory mode” , when the REC starts
the input signal FUNCTION is switched to VIDEO automatically.
When the REC stops, the tape returns near to the recording start
position.
1. Press MD (VIDEO) button to select VIDEO. (This step is not
necessary if the above test mode has already been set)
2. Insert a tape into deck B.
3. After press [REC PAUSE/START] button, press [REC PAUSE/
START] button, then recording start.
of 10 kHz: ±1.0 dB
REC LEVEL
ADJUSTMENT
31
CN301
(R-CH)
RV351
REC BIAS ADJUSTMENT
IC301
RV304
(L-CH)
(R-CH)
RV301
(L-CH)
RV354
21
HCD-GN88D
e
p
Ver 1.3
VIDEO SECTION
RE-ADJUSTMENT OF THE SERVO CIRUIT
The re-adjustment of the servo circuit is necessary when
the part which relates to the servo circuit is replaced.
Referring to SUPPLEMENT-1 “1. DRIVE AUTO ADJUSTMENT”
(see page 3).
Choose ALL and do the re-adjustment of each item of
DVD-SL, CD and DVD-DL.
THE PART THAT THE RE-ADJUSTMENT OF THE SERVO
CIRCUIT IS NECESSARY.
1. Optical pick-up
2. RF AMP (IC001)
3. DSP IC (IC509)
4. Motor driver IC (IC501)
5. EEPROM (IC204)
Note :
1. VIDEO board is basically designed to operate without adjustment. Therefore, check each item in order given.
2. Use DVD reference disc unless othermise indicated.
[DVD reference disc]
• LUV-P01 (4-999-032-01) (CD)
•TDV-540C (J-2501-235-A) (DVD-DL)
• TDV-520CSO (J-2501-236-A) (DVD-SL)
3. Use an oscilloscope with more than 10MΩ impedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.
RFMON Level Check
Perform a RFMON level check before exchanging optical pick-up.
Connection:
oscilloscope
JL005(RFMON)
–RF board (side B) –
JL005
(RFMON)
+
–
VC
VC
IC001
RFMON signal waveform
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
Video Level Check (VIDEO BOARD)
Purpose
This adjustment is made to satisfy the NTSC standard, and if not
adjusted correctly, the brightness will be too large or small.
Oscilloscop
75
Ω
set
J711
VIDEO OUTPUT
Procedure:
1. Connect oscilloscope to VIDEO output.
2. Load a DVD reference disc playback.
3. Check the video signal level is 1.00±0.05Vp-p.
1.00 ± 0.05 Vp-
(WHITE 100%)
• Standard value
DVD
CD
Test Disc
TDV-520CSO
(J-2501-236-A)
LUV-PO1
(4-999-032-01)
RFMON level
RFMON level
Standard Value
1.09±0.2Vp-p
1.05±0.2Vp-p
22
B
These are omitted.
CE
Q
B
These are omitted.
CE
Q
SECTION 7
DIAGRAMS
HCD-GN88D
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
• f : internal component.
2
•
• 5 : fusible resistor.
Note:
The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• C : panel designation.
• A : B+ Line.
• B : B– Line.
• H : adjustment for repair.
•Voltages and waveforms are dc with respect to ground
•Voltages are taken with a VOM (Input impedance 10 MΩ).
•Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
: nonflammable resistor.
under no-signal conditions.
RF, DMB03, VIDEO, REGULATOR boards section
no mark: DVD PLAY
Other board section
no mark: TUNER (FM/AM)
( ): DVD PLAY
< >: TAPE PLAY
[ ]: TAPE REC
Voltage variations may be noted due to normal production tolerances.
Voltage variations may be noted due to normal production tolerances.
F : TUNER (FM/AM)
E : TAPE PLAY (DECK A)
d : TAPE PLAY (DECK B)
G : RECORD
J : DVD PLAY
c : DVD PLAY (DIGITAL OUT)
q : MD/VIDEO (AUDIO) IN
j : GAME IN (AUDIO)
k : GAME IN (VIDEO)
N : MIC INPUT
4
W or less unless otherwise
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• : Pattern from the side which enables seeing.
(The other layers´ Patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B) pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A) parts face are indicated.
• Indication of transistor.
C
Q
B
E
• Abbreviation
AUS : Australian model
E3 : 240 V AC Area in E model
EA : Saudi Arabia model
E15 : Iran model
E51 : Chilean and Peruvian model
MX : Mexican model
PH : Philippines model
SP : Singapore model
MY : Malaysia model
TH : Thai model
These are omitted.
• Abbreviation
AUS : Australian model
E3 : 240 V AC Area in E model
EA : Saudi Arabia model
E15 : Iran model
E51 : Chilean and Peruvian model
MX : Mexican model
PH : Philippines model
SP : Singapore model
MY : Malaysia model
TH : Thai model
23
HCD-GN88D
7-1. CIRCUIT BOARD LOCATION
REGULATOR
CD SWITCH board
SUB TRANS board
TRANS board
board
TUNER PACK
DMB03 board
VIDEO board
SURROUND board
POWER AMP board
SW board
MOTOR (LD) board
DISPLAY board
VOLUME board
GAME IN board
SENSOR board
RF board
MOTOR (TB) board
DRIVER board
MAIN board
24
r
4MHz
2.4Vp-p
p
p
WAVEFORMS
HCD-GN88D
– MAIN BOARD –
IC501 qa XC-OUT
1
32KHz
IC501 qd X-OUT
2
16MHz
T301 4
3
TAPE REC only
µ
sec
13
VOL/DIV : 50V AC
TIME/DIV : 10µsec
T301 5
4
TAPE REC only
3.0Vp-p
VOL/DIV : 1V AC
TIME/DIV : 10µsec
2.0Vp-p
VOL/DIV : 1V AC
TIME/DIV : 50nsec
240Vp-p
64Vp-p
– DMB03 BOARD –
IC901 r; XTAL
1
20 MHz
VOL/DIV : 1V AC
TIME/DIV : 20nsec
IC906 8 XTO
2
27 MHz
IC906 0 SO2
3
30nsec
VOL/DIV : 1V AC
TIME/DIV : 20nsec
IC906 qd SO3
4
3.3 Vp-p
3.5 Vp-p
VOL/DIV : 1V AC
TIME/DIV : 20nsec
4 Vp-p
4 Vp-p
IC207 VDAC_1
6
1H
IC207 VDAC_2
7
IC207 VDAC_3
8
750mVp-p
1H
IC207 VDAC_4
9
128
976 mVp-p
VOL/DIV : 0.5V AC
TIME/DIV : 20 µsec
125
1 Vp-p
1H
VOL/DIV : 0.5V AC
TIME/DIV : 20
122
VOL/DIV : 0.5V AC
TIME/DIV : 20 µsec
119
750mVp-p
– DISPLAY BOARD –
IC601 is X OUT
1
VOL/DIV : 1V AC
TIME/DIV : 0.2µsec
µ
sec
– RF Board –
1
IC001 1 DVD RFP
0.2V/div
100nsec/div
2
IC001 el TE
0.5V/div
1msec/div
3
IC001 r; FE
0.1V/div
1msec/div
4
IC001 tj RFAC
0.7Vp-
1.8Vp-
0.3Vp-p
µ
sec
13
VOL/DIV : 50V AC
TIME/DIV : 10µsec
30nsec
IC207 VDAC_0
5
1H
VOL/DIV : 1V AC
TIME/DIV : 20nsec
131
1Vp-p
VOL/DIV : 0.5V AC
TIME/DIV : 20
1H
VOL/DIV : 0.5V AC
TIME/DIV : 20 µsec
µ
sec
0.5V/div
100nsec/div
1.2Vp-p
2525
HCD-GN88D
7-2. BLOCK DIAGRAM – DVD DSP (1/2) Section –
OPTICAL PICK-UP
BLOCK
(TDP022W)
IC001
DVD/CD RF AMP
IC509
CD DECODER
SERVO DSP
DOUT
SPINDLE
MOTOR
SLED
MOTOR
DVDLD
CDLD
LD GND
VCC
GND
FCS+
FCS-
TRK+
TRK-
M
M
INLIM
64
8
SCLK
13
WDCK
GFS
COUT22FOK24LOCK
19
DOUT
LRCK
PCMD
BCK
EXCK
C2PO
SCOR
XTAI
117
RFIN
SPIN
LRCK
163
MDAT
160
BCLK
158
SBIN
148
EXCK
147
WFCK
151
C2PO
155
SCOR
150
GSCOR
146
MDIN2
137
SPO
135
APE0
109
D0-D7 A0-A7
172-176
1,2,4
8 8
65
66
67
79SBSO
80
10WFCK
14
15
17
IC703(1/2)
AMP
25MDP
71
768FS
IC703(2/2)
AMP
IC503
AMP
5
6
50 RFAC
20 MIRR
39 FE
40 SE
41 TE
RFDC
43
CE
42
VC
38
33
FFDR
34 FRDR
31
TFDR
TRDR
32
29
SFDR
30 SRDR
26
SSTP
76
SQSO77SQCK
63
MD2
2
XRST
3
DATA5XLAT6CLOK7SENS
MUTE
4
1
RF
B
A
D
C
E
F
VC
Q001
LD
DRIVE
Q002
LD
DRIVE
PD
A +5V
SPDL+
SPDL-
SLEDA+
SLEDA-
SLEDB+
SLEDB-
DVDRFP
A23
B2
4
C25
6
D2
A12
B
11
C10
9
D
CD A16
CD B
15
CD C
14
13
CD D
17
CD F
18
CD E
VC
20
21
DVD LD
22
CD LD
23
DVDPD
24
CDPD
DO1+
36
DRV
DO1-
37
DO2+
34
DRV
DO2-
35
IC501
MOTOR/COIL DRIVE
DO5+
27
DRV
DO5-
28
IN6+
47
IN6-
46
DO3+
32
DO3-
31
DRV
DO4+
30
DO4-
29
TSD-M
57RFAC
27MIRR
40FE
39TE
MNTR
42
VI25
36
48SDEN
47SDATA
46SCLK
26LDON
42
40
IN1+
48
IN1-
1
IN2+
3
IN2-
4
43
VC VC
IN5-
13
OUT6
45
IN3-
10
IN4-
7
MUTE12
MUTE34
MUTE5
19202122
MIRR
PI/CE
SDEN
DATA RF
CLK RF
LDON
FFDR
FRDR
TFDR
TRDR
7
VC
IC701
DVD DECODER
HDB0-HDB8
XRD17XWR18XCS19XINT020XINT1
5,7,
9-14
44,41,39,35
32,30,27,24,26
46HDRQ
48
XHWR
49
XHRD NC
53XHAC
66-69,71,
MD0-MD9,
MDA-MDF
73-75,
96,97,99,
101,102,
104-106
79,80,
MA0-MA9
82-87,
89,91
XMWR
76
XRAS RAS
XOE OE
XCAS
95
MA11/MNT2
MA10/MNT1
21
XTL1
GFS
93
171
92
107
XRST
164
XSAK
XDCK
XSRQ
12
DVD DSP (2/2)
A
SECTION
B
(Page 27)
DVD DSP (2/2)
SECTION
(Page 27)
HDB-DATA
XSAK
XSDCK
XSRQ
IC706
16M DRAM
2-5,
16
7-10,
I/O0-I/O15
41-44,
46-49
21-24,
A0-A11
27-32,
20,19
WE
17
1878
3394
UCAS
34
LCAS
35
768FS-2
768FS-1
SW
X901
20MHz
Q901
40 XTAL
41 EXTAL
76
73
LDSEL
63
TSD-M
SP_ON
60
MUTE_2D
44
43
SLED_B
SLED_A
IC901(1/2)
6
MNT1
MECHANISM
CONTROLLER
SDA_EEP
SCL_EEP
WP_EEP
100
IC903
EEPROM
5 SDA
5
99
SCL
6
WP
7
• Signal Path
: DVD
: DIGITAL OUT
XRST
28
62
82
FG
LDON
2
83
SDEN
SDATA_RF
SDCLK_RF
7
8
66
FCS_JMP_1
FCS_JMP_2
65TE67FE29
PI
61
MIRR
SLED
31
52
INLIM
SQSO
98
54
3
SQCK
DOCTRL/ISBTEST
49 27 50 9 72
59
XDRST
DATA_CD
MUTE_CD
LAT_CD
CLOK_CD
71
SCLK_CD
SENS_CD
30
GFS_CD
COUT_CD
74
FOK_CD
75
LOCK_CD
26
64
SCOR
45
14-21
89-96
D0-D7
JIT
SCK_DSD
A0-A7
22
84
85
12
XRD
XWR
XCS_DVD
INIT0_DVD23INIT1_DVD
25
XRST_1882
58
GFS_DVD
2626
– DVD DSP (2/2) Section–
DOUT
DVD DSP (1/2)
SECTION
(Page 26)
A
DVD DSP
SECTION
(Page 26)
HDB-DATA
X SAK
X DCK
X SRQ
AUDIO
+5V
D +5V
ZIVA
D +3.3V
B
1 3
1 3
1 3
768FS-2
768FS-1
IC392
+3.3V
REG.
IC907
+3.3V
REG.
IC211
+1.8V
REG.
IC203
SDRAM
DQ0-DQ31
A0-A9,A10/AP,NC
D+3.3V
A3V-2
D +1.8V
8
2,4,5,7,
8,10,11,13,
74,76,77,79,
80,82,83,85,
31,33,34,36,
37,39,40,42,
45,47,48,50,
51,53,54,56
25-27
60-66
24,21
16,71,28,59
WE
17
18 52
19 51
20 49
22 48
23
ZIVA
IC901 (2/2)
MECHANISM
CONTROLLER
177-174
171-168,182
32
12
4
62,73,86,97
IC204
EEPROM
WC
DO
IC904
FF
CKQ
3 1
CLR
6
4
DVD SYSTEM PROCESSOR
SDDATA0-SDDATA7,
SDEN
179
SDCLK
183
SDREQ
178
57-60
64-71
75-78
MD0-MD31
81-84
88-95
99-102
42-33
MA0-MA11
45,46
MDQM0-MDQM3DQM0-DQM3
MWE
53
MCASCAS
MRASRAS
MCS0CS
BA0BS0
47
BA1BS1
188 DRVRDY
162 CS (ZIVA_E2P)
165 WRITE_CTRL (ZIVA_E2P)
8
6
5DI
4SK
3CS
1R/B
Q202
IC902
GATE
2
1
33
32
CS_ZIVA
IC207
SDERROR
186 DRVTXSO_ZIVA
187 DRVRXSI_ZIVA
35
34
HAD0-HAD15
184 HIRQ1DRVIRQ36191 RST_SPCRST
185 DRVCLKSCK_ZIVA
37
HA1-HA3
116 HIRQ2
38
DRVRDY
156IEC958
155DATA3(CSW)
154DATA2(SLR)
151DATA1(FLR)
150DATA0(DM)
149BCK
148LRCK
147XCK
109CDSEL
110MREQ
115ML
114MC
113MDI
131VDAC 0
128VDAC 1
125VDAC 2
122VDAC 3
119
VDAC 4
107VS
22,19-14,
11-3
2,207,206
190ALE
195HCS0
25WEH.UDS
27HEL.LDS
XIN
139
161 I2C DAI2C_SIO78160 I2C CLI2C_SCL79202 RESET
Q903
Q904
D +3.3V
DOUT
IEC958
DATA3
DATA2
DATA1
DATA0
BCK-ZIBA
LRCK-ZIBA
CDSEL
MREQ
WIDE
HAD0-15
HA1-3
HAD0-15
SYS-RESET
I2C-CL
I2C-DA
XCK
ML
MC
MDI
V
C
Y
CB/R
CR/B
49-47,45-40,38-36
27MM
768FS
768FS
40
SYS-RESET
DATA OUT SELECTOR
2
1
ADDRESS LATCH
55,54,52,51,
34,33,31
26 CE
11 WE
28
OE
CLOCK GENERATOR
3MO1
MO2
10
MO3
13
IC252
6
IC216
1LE,2LE
29 56
IC206
RAM
A0-A21
DQ0-DQ15
IC906
5
2,3,5,6,8-10
12-17,19-21,
23,24,26
25,24,23,
22-18,
8-1,48,
17,16,9,
29-36,
38-45
IIC-CLK
IIC-DATA
IC501 (1/5)
10
7XTI
8XTO
SYSTEM
CONTROL
DOUT
HA4-22
HA1-3
HA1-22
HAD0-15
X902
27MHz
M
DISPLAY
SECTION
(Page 31)
81
VIDEO OUT
25
DVD-MUTE
(DVD-A-MUTE)
34
M-REQ
33
VMUTE
32
VMUTE2
AUDIO
D +3.3V
V
C
Y
CB/R
CR/B
WIDE
EJECTSW
D-SENS
TM-R
LMF
LMR
TM-F
HCD-GN88D
IC201
OPTICAL
DIGITAL
OUT
IC302
D/A CONVERTER
VOUT7
Q223,224
BUFFER
DATA3
47
DATA2
46
DATA1
45
DATA4
31
BCK
40
LRCK
41
SCKI
38
36
ML
MC
35
MDI
34
RST
37
IC711
VIDEO AMP/BUFFER
4 V-IN
2 C-IN
6 Y-IN
12 CY-IN
CB-IN
14
16
CR-IN
15
MUTE2
3
MUTE1
VOUT8
VOUT1
VOUT2
VOUT5
VOUT3
VOUT4
VOUT6
V-OUT.B
C-OUT
Y-OUT.B
CY-OUT.B 25
CB-OUT.B 22
CR-OUT.B 19
16
20
14
13
10
12
11
9
30V-OUT.A
31
33
27Y-OUT.A
28
24CY-OUT.A
21CB-OUT.A
18CR-OUT.A
MUTE
Q215,216
MUTE
Q217,218
MUTE
Q219
MUTE
Q220,221
MUTE
Q222
2
3
1
IC710
VIDEO SELECTOR
Q701,711
7
DOWNMIX-L
DOWNMIX-R
FRONT-L
FRONT-R
CENTER
SURROUND-L
SURROUND-R
SW (LFE)
M-REQ
VMUTE
VMUTE2
42
S751
(LEVER)
D+3.3V
Q731
41
46
47
44
45
E-1
21
E-2
22
43
E-3
3
4
IC731
TABLE SENSOR
RE701
ROTARY
ENCODER
1
2
FIN
7
RIN
9
7
9
MOTOR DRIVER
FIN
RIN
MOTOR DRIVER
IC701
MOTOR
DRIVE
MOTOR
DRIVE
IC712
OUT2
OUT1
OUT2
OUT1
2
4
2
4
C
M
M
CD DIGITAL OUT
OPTICAL
D
M751
(LOADING)
M741
(TABLE)
C
VIDEO
VIDEO
Y
Y
PB/C
PR/C
DISPLAY
SECTION
(Page 31)
SECTION
(Page 29)
J712
S VIDEO
OUT
B
R
MAIN
J601 (1/2)
GAME
INPUT
J711
VIDEO
OUT
COMPONENT
VIDEO OUT
J710
• Signal Path
: DVD
: DIGITAL OUT
: VIDEO
: GAME IN (VIDEO)
2727
HCD-GN88D
– TUNER/TAPE DECK Section –
DECK-A
L – CH
PB
HEAD
R – CH
DECK-B
L – CH
REC/PB
HEAD
R – CH
ERASE
HEAD
TC BLOCK
REC(REV)
REC(FWD)
BSHUT
ASHUT
ATRGM+
BTRGM+
CAP M+
CN304
R-CH
R-CH
R-CH
BPLAY
APLAY
BHALF
AHALF
RV304
REC
BIAS(L)
C332, 333
BIAS
TRAP
T301
1
2
3
BIAS OSC
Q302, 303
RIPPLE
FILTER
Q301
REC/PB SWITCH
IC302
SWR1
GND
R-CHSWP1
TC A+9V
4
Q307,310
BUFFER
Q304,305
Q391, 392
A TRIG
DRIVE
Q395, 396
B TRIG
DRIVE
Q393,394
CAP MOTOR
DRIVE
32
34
21
AIN1
A
B
BIN1
REC-OUT1
93
120
PB/REC EQUALIZER AMP
EQ
R-CH
EQ OUT1
28 27 26
DECK A/B SELECT
IC301
13 12 11 15 14
+
A/B
NORM/HIGH SPEED
IC303
HPF
MUTE
Q306,389
TAI1
ALC ON/OFF
REC MUTE ON/OFF
AMS DETECT
Q390, 398, 399
PB OUT1
REC IN1
MUTE ON/OFF
TAPE L-CH
CN301
L
TEST
R-CH R
RV301
REC(L)
LEVEL
24
(CD/TAPE MECHANISM CONTROL)
CONNECTOR
REC L-CH
SYSTEM CONTROL
E
G
MAIN
SECTION
(Page 29)
MAIN
SECTION
(Page 29)
IC501(2/5)
63
AMS-IN
52
TC-MUTE
51
REC-MUTE
54
ALC
EQ-H/N
65
53
PB-A/B
REC BIAS
56
B REC, REV
60
A REC, FWD
66
90
B-SHUT
A-SHUT
89
61
B-PLAY
69
A-PLAY
B-HALF
91
A-HALF
67
55
TC-RELAY
59
A-TRIG
58
B-TRIG
CAPM-CTRL
57
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: TUNER (FM/AM)
: PLAYBACK (DECK A)
: PLAYBACK (DECK B)
: RECORD
AM
FM 75Ω
COAXIAL
ANTENNA
FM/AM TUNER UNIT
FM ANT
AM ANT
ST-DOUT/MC-DIN
ST-DIN/MC-DOUT
AM ANT
ST-L
ST-R
ST-MUTE
STEREO
TUNED
ST-CLK
ST-CE
TUNER L – CH
R-CH
F
MAIN
SECTION
(Page 29)
ST-MUTE
100
STEREO
1
TUNED
2
ST-DIN
65
ST-DOUT
88
97
ST-CLK
ST-CE
87
2828
– MAIN Section –
HCD-GN88D
GAME
INPUT
MD/VIDEO
(AUDIO)
AUDIO
TUNER/TAPE
SECTION
(Page 28)
TUNER/TAPE
SECTION
(Page 28)
DVD DSP
(2/2)
SECTION
(Page 27)
VC
RV722
MIC LEVEL
J721
MIC
J117
L
R
IN
L
R
J601 (2/2)
E
F
R-CH
R-CH
TAPE L-CH
TUNER L-CH
DOWNMIX-L
DOWNMIX-R
FRONT-L
FRONT-R
C
CENTER
SURROUND-L
SURROUND-R
SW (LFE)
MIC AMP
IC722(1/2)
VC (+5V)
37
40
41
2
13
6
10
15
14
1 8
+
I/F
DATA CLOCK
17 18
LPF1
IN
DIGTAL
ECHO
IC721
38
39
34
33
32
12
5
9
24
LPF2
OUT
RV721
ECHO LEVEL
R-CH
+
IC722 (2/2)
R-CH
(+5V)
MIC AMP
VC (+5V)
+5V REG.
Q721
MIC OUT
11
4
3
8
7
23
LPF
SURROUND
VOL CONTROL
IC103
A+9V
INPUT SELECT SWITCH,
GRAPHIC EQUALIZER CONTROL,
ELECTRICAL VOLUME
IC102
INC1
5
INB1
INPUT
4
INA1
3
IND1
6
INEX1
7
SUR1
42
SUR2
41
SELECT
SWITCH
R-CH
+
+
25
31
30
29
28
27
26
22
Q802 Q803
2
8
MIC
RECB1
SURROUND OR
DPL BUFFER
A+9V
Q650,651
BUFFER
MUTE
Q799
MUTE
Q800
MUTE
Q801
MUTE
Q798
REC-L
TUNER/TAPE
G
AUDIO OUT
SWITCH
IC730
SPEANA
DBFB
F/B
4
5
2
13
H
I
3
R-CH
R-CH
SWOUT
OUT1
Q101
R-CH
MUTE
Q620, 670
24
18
D130
+
COMMAND
VL
IN1
VOLUME
CONTROL
CPU
INTERFACE
DATA
CLK
BB-A1
22 1621
BB-B1
17
R-CH
C
A
B
C
A
B
+
R-CH
MID/
BASS &
TREBLE
L+R
19
F OUT2
Q105
MUTE
14 15
1
F-R
F-L
CENTER-L
J
REAR-L
REAR-R
RELAY DRIVE
Q701, 702
RY701
AC CUT DETECT
K
SECTION
(Page 30)
SECTION
Q730
DISPLAY
SECTION
(Page 31)
AMP
SECTION
(Page 30)
AMP
SECTION
(Page 30)
AMP
(Page 28)
L
AUDIO OUT
R
J730
SUBWOOFER
J716
• R-ch is omitted due to same as L-ch.
86 87 79 80 82 7071 6877
• SIGNAL PATH
: TUNER (FM/AM)
: DVD
: TAPE PLAY
: RECORD
VOLUME-CLK
VOLUME-DATA
SYSTEM CONTROL
IC501
(3/5)
LINE MUTE
MIC DETECT
SPEANA MUTE
AUDIO-CLK
AUDIO-DATA
AUDIO OUT
SW-RELAY
: MIC INPUT
: MD/VIDEO (AUDIO) IN
: GAME IN (AUDIO)
2929
HCD-GN88D
– AMP Section –
MAIN
SECTION
(Page 29)
MAIN
SECTION
(Page 29)
IC501
POWER AMP
F-L
18 10
+ +
F-R
STK MUTE
J
REAR-L
14
CT
4
OUT
3
14
12
MUTING
Q503, 504, 581
IC502
OVER CURRENT
PROTECTOR
9
DC DET
OVER
LOAD
6
TH502
VP
OCP
THERMAL
DETECT
Q505, 506
Q518
2
1
D502
OVER LOAD
DETECT
Q501, 551
D391
OVER LOAD
DETECT
Q301, 341, 351
+
REAR-R
10
5
DBFB
F/B
D+3.9V
I
D509
RELAY DRIVE
Q381, 384
MUTING
Q621, 671
MUTING
CONTROL
Q652
HP-MUTE
RY381
RY501
RELAY DRIVE
Q516, 517
F-RELAY
PROTECT
SWITCH
Q511
PROTECT
SWITCH
Q385
Q510
TM501(1/2)
+
+
-
+
-
AC CUT DETECT
H/P DET
AC CUT DETECT
FAN DET
FAN-ON
FAN-K
FAN MOTOR
DRIVE
Q851-854
TM501 (2/2)
+
+
-
L
FRONT SPEAKER
R
MAIN
K
SECTION
(Page 29)
DISPLAY
L
SECTION
(Page 31)
M891
DC FAN
M
L
R
J631
PHONES
IMPEDANCE
USE 6-16Ω
SURROUND
SPEAKER
IMPEDANCE
USE 8Ω
CENTER
STK-MUTE
75 78
STK-MUTE
PROTECTOR
15
POWER AMP
IC301
18
TH501
THERMAL
DETECT
Q514
SYSTEM CONTROL
IC501 (4/5)
Q602
VACS
CONTROL
72
VACS IN
85
84
(REAR L/R
LINE-RELAY
SURR RLAY)
RELAY DRIVE
Q383, 386
CENTER-RELAY
RY382
FAN-K
HP-MUTE
76
88
HP-MUTE
F-RELAY
83
FAN KICK
FRONT-RELAY
HP-DET
50
HP-DETECT
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: TUNER (FM/AM)
CENTER
+
SPEAKER
IMPEDANCE
-
USE 8Ω
3030
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