Sony HCD-GTX88 User manual

1
Ver. 1.0 2007. 06
Model Name Using Similar Mechanism NEW
CD CD Mechanism Type CDM74KF-K6BD91UR-WOD//M
Section Optical Pick-up Name KSM-213DCP/C2NP
Tape Deck Model Name Using Similar Machanism HCD-GN1100D
Section
SERVICE MANUAL
E Model
Australian Model
HCD-GTX88
Amplifier section
Brazil model only
The following are measured at
AC 127 V or 220 V, 50/60 Hz
Front/Surround speaker
RMS output power: 205 W + 205 W
(at 8 Ω, 1 kHz, 10% THD)
Subwoofer
RMS output power: 130 W + 130 W
(at 6 Ω, 100 Hz, 10% THD)
Other models
The following are measured at
Mexican model: AC 127V, 60 Hz
Other models: AC 120, 220, 240 V, 50/60 Hz
Front/Surround speaker
Power Output (rated): 175 W + 175 W
(at 8 Ω, 1 kHz, 1% THD)
RMS output power (reference):
255 W + 255 W
(per channel at 8 Ω, 1 kHz,
10% THD)
Subwoofer
RMS output power (reference):
130 W + 130 W
(at 6 Ω, 100 Hz, 10% THD)
SPECIFICATIONS
Inputs
VIDEO (AUDIO IN) L/R:
Voltage 250 mV,
impedance 47 kilohms
AUDIO (AUDIO IN) L/R:
Voltage 450 mV,
impedance 47 kilohms
MIC: Sensitivity 1 mV,
impedance 10 kilohms
(USB) port: Type A
Outputs
PHONES: accepts headphones of
8 ohms or more
Disc player section
System Compact disc and digital
audio system
Laser Semiconductor laser
(λ=770 – 810 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.
Sony Corporation
Personal Audio Division
Published by Sony Techno Create Corporation
9-887-753-01
2007F04-1
© 2007. 06
– Continued on next page –
CD DECK RECEIVER
•HCD-GTX88 is the tuner, deck,
CD and amplifier section in
MHC-GTX88.

2
HCD-GTX88
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON 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.
Frequency response 20 Hz – 20 kHz
Wave length 770 – 810 nm
Signal-to-noise ratio More than 90 dB
Dynamic range More than 88 dB
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
Brazil model: 87.5 – 108.0 MHz
(100 kHz step)
Other models: 87.5 – 108.0 MHz
(50 kHz step)
Antenna FM lead antenna
Antenna terminals 75 ohm unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
Latin American and Oceanian models:
530 – 1,710 kHz (with the
interval set at 10 kHz)
531 – 1,710 kHz (with the
interval set at 9 kHz)
Other models: 531 – 1,602 kHz (with the
interval set at 9 kHz)
530 – 1,610 kHz (with the
interval set at 10 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
USB section
Supported bit rate MP3 (MPEG 1 Audio Layer 3):
32 – 320 kbps, VBR
Sampling frequencies MP3 (MPEG 1 Audio Layer 3):
32/44.1/48 kHz
Transfer speed Full-Speed
Supported USB device Mass Storage Class
Maximum current 500 mA
General
Power requirements
Mexican model: 127 V AC, 60 Hz
Brazil model: 127 V or 220 V AC, 50/60 Hz,
Adjustable with voltage
selector
Oceanian model: 230 – 240 V AC, 50/60 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 430 W
Dimensions (w/h/d) (Approx.)
281 ×361 ×417 mm
Mass (Approx.) 14.2 kg
Design and specifications are subject to change without
notice.

3
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
HCD-GTX88
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
breakdown 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 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.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead
free 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 usinga temperature regulatorshouldbe set toabout
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 viscou-s (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.
This appliance is
claassified as a CLASS 1
LASER product. This
label is located on the
rear exterior.
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 component in this product is capable
of emitting radiation exceeding the limit for
Class 1.

4
HCD-GTX88
MODEL IDENTIFICATION
– MODEL NUMBER LABEL –
MODEL PARTS No.
GTX88: E2 3-113-126-0s
GTX88: E51 3-198-009-0s
GTX88: AUS 3-197-997-0s
GTX88: AR 3-198-001-0s
•Abbreviation
E2 : 120V AC area in E model
E51 : Chilean and Peruvian model
AR : Argentina model
AUS : Australian model
PART No.

5
TABLE OF CONTENTS
HCD-GTX88
1. GENERAL
Guide to parts and controls...................................................... 6
2. DISASSEMBLY
2-1. Case (Top) ......................................................................... 13
2-2. Loading Panel.................................................................... 13
2-3. Tuner Pack......................................................................... 14
2-4. CD Block Section.............................................................. 14
2-5. Front Panel Section ...........................................................15
2-6. Tape Mechanism Deck, Mic Board,
USB Connector Board....................................................... 15
2-7. Panel Board, Function Board, Jog Board.......................... 16
2-8. CD-SW Board ................................................................... 16
2-9. Cover (CDM) .................................................................... 17
2-10. Back Panel Section............................................................ 17
2-11. Power Board Section .........................................................18
2-12. Main Board ....................................................................... 18
2-13. Subwoofer Board, Power Board........................................ 19
2-14. Power Transformer (T1200).............................................. 19
2-15. BD91 Board ...................................................................... 20
2-16. Driver Board, SW Board, USB Board .............................. 20
2-17. Optical Pick-up ................................................................. 21
2-18. Sensor Board ..................................................................... 21
2-19. Motor (TB) Board ............................................................. 22
2-20. Motor (LD) Board .............................................................22
3. TEST MODE ..................................................................... 23
4. MECHANICAL ADJUSTMENTS ............................... 27
5. ELECTRICAL ADJUSTMENTS................................. 28
6. DIAGRAMS
6-1. Block Diagram — RF/Servo Section — ........................... 31
6-2. Block Diagram — Tape/Tuner Section — ........................ 32
6-3. Block Diagram — Main Section —.................................. 33
6-4. Block Diagram — USB Section — .................................. 34
6-5. Block Diagram — AMP/Subwoofer Section — ............... 35
6-6. Block Diagram — Display/Power Section — .................. 36
6-7. Circuit Boards Location .................................................... 37
6-8. Printed Wiring Board — BD91 Section — .......................40
6-9. Schematic Diagram — BD91 Section —..........................41
6-10. Printed Wiring Boards — Driver Section —..................... 42
6-11. Schematic Diagram — Driver Section —......................... 43
6-12. Schematic Diagram — Main Section (1/4) — .................. 44
6-13. Schematic Diagram — Main Section (2/4) — .................. 45
6-14. Schematic Diagram — Main Section (3/4) — .................. 46
6-15. Schematic Diagram — Main Section (4/4) — .................. 47
6-16. Printed Wiring Board — Main Section — ........................ 48
6-17. Printed Wiring Board — USB Connector Section — ....... 49
6-18. Schematic Diagram — USB Connector Section —.......... 49
6-19. Printed Wiring Board — USB Section —......................... 50
6-20. Schematic Diagram — USB Section — ........................... 51
6-21. Printed Wiring Board — Effector Section — ................... 52
6-22. Schematic Diagram — Effector Section — ......................53
6-23. Printed Wiring Board — Panel Section —........................ 54
6-24. Schematic Diagram — Panel Section — .......................... 55
6-25. Printed Wiring Boards — Function Section —................. 56
6-26. Schematic Diagram — Function Section — ..................... 57
6-27. Printed Wiring Board — PowerAmp Section — ............. 58
6-28. Schematic Diagram — Power Amp Section — ................ 59
6-29. Printed Wiring Board — Subwoofer Section — ............... 60
6-30. Schematic Diagram — Subwoofer Section —.................. 61
6-31. Printed Wiring Boards — Trans Section — ......................62
6-32. Schematic Diagram — Trans Section — .......................... 63
7. EXPLODED VIEWS
7-1. Main Section ..................................................................... 78
7-2. Front Panel Section (1)...................................................... 79
7-3. Front Panel Section (2)...................................................... 80
7-4. Front Panel Section (3)...................................................... 81
7-5. Chassis Section ................................................................. 82
7-6. CD Mechanism Section (1) ............................................... 83
7-7. CD Mechanism Section (2) ............................................... 84
8. ELECTRICAL PARTS LIST ........................................ 85

6
HCD-GTX88 SECTION 1
GENERAL This section is extracted
from instruction manual.
6
GB
Guide to parts and controls
This manual mainly explains operations using the buttons on the unit, but the same
operations can also be performed using the buttons on the remote having the same or
similar names.
Unit
–Front view
–Top view
qdqfqgqh
1234
5
6
qj
qk
ql
w;
wa
ws
wd
wf
7
8
9
q;
qa
qs
wkwj wgwh

7
HCD-GTX88
7
GB
Guide to parts and controls
1FLANGER (pages 35, 43, 48)
DELAY (pages 35, 43, 48)
CHORUS (pages 36, 43, 48)
SOUND FLASH (page 35)
Press to create a party atmosphere.
BDisplay (pages 9, 38, 39, 48)
CSURROUND SPEAKER MODE
(MHC-GTX88 only) (page 34)
Press to select the sound system.
SURROUND
(MHC-GTX77/MHC-GTX66only)
(page 34)
Press to select the surround effect.
DDisc tray (pages 9, 17, 44, 48)
EAMP MENU (page 38)
Press to change the spectrum
analyser display or to adjust the
brightness of the display.
FRETURN (pages 17, 25)
Press to return to the parent folder.
GNX (play/pause)(pages 17,22,
24, 30, 44)
Press to start or pause playback.
x(stop) (pages 17, 23, 25, 28,
29, 30, 32, 44)
Press to stop playback or recording.
./> (go forward/go
backward) (pages 17, 20, 23, 25,
27, 31, 48)
Press to select a track.
TUNING +/– (pages 28, 29)
Press to tune in a radio station.
+/– (pages 17, 20, 23, 25, 27,
31)
Press to select a folder.
m/M (rewind/fast forward)
(page 30)
Press to fast forward or rewind.
HCD- SYNC/REC 1 (page 22)
Press to record from a disc onto the
connected optional USB device
(Digital music player or USB storage
media).
CD-TAPE SYNC (page 31)
TAPE REC PAUSE/START
(page 31)
Press to record onto a tape.
IPUSH OPEN/CLOSE Z (Deck B)
(page 30)
Press to insert or eject a tape.
Deck B (pages 30, 31, 37, 48)
JENTER (pages 23, 29, 33, 48)
Press to enter the selection.
KERASE (page 23)
Press to erase MP3 audio tracks or
folders on the connected optional
USB device (Digital music player or
USB storage media).
LMASTER VOLUME (pages 17,
24, 39, 43)
Turn to adjust the volume.
MMIC (jack) (pages 36, 43, 52)
Connect an optional microphone.
MIC LEVEL (pages 32, 36, 43)
Turn to adjust the microphone
volume.
USB
Continued
l

8
HCD-GTX88
8
GB
NREC/ERASE (indicator)
(pages 23, 25)
Lightsupwhenrecordingfrom adisc
onto the connected optional USB
device (Digital music player or USB
storage media).
Lights up when erasing MP3 audio
tracks from the connected optional
USB device (Digital music player or
USB storage media).
O(USB) port (pages 22, 23,
24, 41, 52)
Connect an optional USB device
(Digitalmusic playeror USB storage
media).
PPHONES (jack) (pages 43, 52)
Connect the headphones.
QPower illuminator (pages 35, 39)
RPRESET EQ (page 33)
Press to select a preset sound effect.
SZPUSH OPEN/CLOSE (Deck A)
(page 30)
Press to insert or eject a tape.
Deck A (pages 30, 48)
TFunction buttons:
CD (pages 14, 17, 22, 29, 31, 38)
TUNER/BAND (pages 29, 38)
TAPE A/B (pages 30, 38)
AUDIO (pages 38, 41)
VIDEO (pages 38, 41)
(pages 23, 24, 26, 38)
Press to select a function.
U"/1 (on/standby) (pages 13, 14,
29, 43, 48)
Press to turn the system on or off.
VGROOVE (page 33)
Press to reinforce the bass.
WIR Receptor (page 43)
XEQ BAND/MEMORY (page 33)
Press to select a frequency band
when adjusting the graphic
equalizer.
YDISPLAY (pages 38, 39, 40)
Press to change the information in
the display.
ZOPERATION DIAL (pages 17,
25, 33, 35, 38)
Turn to select a track or folder.
Turn to select a setting.
wj ILLUMINATION (page 39)
Press to change the power
illuminator pattern.
wk DISC SKIP/EX-CHANGE
(pages 14, 17, 18, 20)
Press to skip a disc.
Press to exchange other discs during
playback.
ZOPEN/CLOSE (pages 14, 17,
44)
Press to load or eject a disc.
DISC 1 ~ 3 (pages 18, 20)
Press to select a disc.
Press to switch to CD function from
other function.
USB

9
HCD-GTX88
9
GB
Guide to parts and controls
–Display
ALights up when the USB function is
selected (page 24).
B“MP3” lights up when an MP3 audio
track is recognized. “CD” lights up
when a disc is recognized.
CIndicates the type of MP3 audio track
information that displayed (page 39).
“”lights up when a track name is
displayed. “ ” lights up when an
artist name is displayed. “ ” lights
up when a folder name is displayed.
DIndicates the tuner band (page 28).
ELights up when the MP3 audio track
contains ID3 tag information.
FDisplays the current status and
information (page 39).
GIndicators for the TUNER function
(page 28).
HLights up when the Play Timer or
Recording Timer is set (page 37).
ILights up when the Sleep Timer is
activated (page 37).
JLights up during recording (pages 22,
31).
KIndicators for the TAPE function
(page 30).
“”and “ ” lights up when the
system is turned on.
“”lights up when there is a tape in
the deck.
LLights up when an optional USB
device (Digital music player or USB
storage media) is recognized
(page 22).
MIndicates the selected play mode
(pages 19, 26).
NIndicators for the disc tray (page 17).
“”lights up when the disc is
selected. “ ” lights up when there is
a disc on the disc tray. “1”, “2” and
“3” light up when the system is turned
on.
OIndicates the activated sound effect
(pages 33, 35).
Note
“LINK”, “MATRIX SUR 1” and
“MATRIX SUR 2” light up for
MHC-GTX88 only.
FM AM ID3 AUTO PRESET ST
MONO
MHz
kHz
TUNED
REC
PLAY
SLEEP
CD
USB
MP3 BOOSTER
SUR
FLANGER CHORUS DELAY
MATRIX SUR 12
LINK
Z
GROOVE
SHUF TAPE USB
USB
MEMORY
PGM
ALL 1 DISC S
REP 1
SYNC
AB
1
2
3
q
a
q
;
q
s
432 5 6 7 81
9q
d
q
f
q
g
MP3
REC
A B
Continued
l

10
HCD-GTX88
10
GB
Subwoofer A (SS-WG88A)
1SUBWOOFER ON/OFF
(page 13)
Press to turn the subwoofer on or off.
2SUBWOOFER LEVEL (page 13)
Turn to adjust the subwoofer level.
Remote
1"/1 (on/standby) (pages 13, 16,
43)
Press to turn the system on or off.
BCLOCK/TIMER SELECT
(page 38)
CLOCK/TIMER SET (pages 16,
37)
Press to set the clock and the timers.
CREPEAT/FM MODE (pages 21,
27, 29, 47)
Press to change the Repeat Play
setting.
Press to select the FM monaural or
stereo reception.
DUSB (page 24)
Press to select the USB function.
CD (page 17)
Press to select the CD function.
TUNER/BAND (page 28)
Press to select the TUNER function.
Press to select FM or AM band.
FUNCTION (pages 30, 41)
Press to select a function.
2
1
q;
qa
qs
qd 3
4
5
2
6
7
9
8
qf
1qg

11
HCD-GTX88
11
GB
Guide to parts and controls
E./> (go forward/go
backward) (pages 17, 20, 23, 25,
27, 31, 37, 48)
Press to select a track.
+/– (tuning) (pages 28, 29)
Press to tune in a radio station.
m/M (rewind/fast forward)
(pages 17, 25, 30)
Press to find a point in a track.
(play) (pages 17, 24, 30, 44)
X(pause) (pages 17, 30)
x(stop) (pages 17, 25, 28, 30,
32)
Press to start, pause or stop playback.
FENTER (pages 16, 23, 28, 33,
37)
Press to enter the selection.
GDISC SKIP (pages 18, 20)
Press to skip a disc.
H+/– (pages 17, 20, 23, 25, 27,
31)
Press to select a folder.
IVOLUME +/–*(pages 17,24, 39,
43)
Press to adjust the volume.
*TheVOLUME+button hasa tactiledot.
Use the tactile dot as a reference when
operating the system.
JEQ (page 33)
Press to select a preset sound effect.
KCLEAR (pages 21, 27)
Press to delete a pre-programmed
track.
LPLAY MODE/TUNING MODE
(pages 19, 26, 28, 29, 44)
Press to select the play mode of CD
or USB function.
Press to select the tuning mode.
qd TUNER MEMORY (page 28)
Press to preset a radio station.
qf DISPLAY (pages 38, 39, 40)
Press to change the information on
the display.
qg SLEEP (page 37)
Press to activate the Sleep Timer.

12
HCD-GTX88 SECTION 2
DISASSEMBLY
Note : Disassemble the unit in the order as shown below.
2-19. MOTOR (TB) BOARD
(Page 22)
2-20. MOTOR (LD) BOARD
(Page 22)
2-1. CASE (TOP)
(Page 13)
2-2. LOADING PANEL
(Page 13)
SET
2-3. TUNER PACK
(Page 14)
2-16. DRIVER BOARD,
SW BOARD,
USB BOARD
(Page 20)
2-15. BD91 BOARD
(Page 20)
2-17. OPTICAL PICK-UP
(Page 21)
2-4. CD BLOCK SECTION
(Page 14)
2-10. BACK PANEL SECTION
(Page 17)
2-5. FRONT PANEL SECTION
(Page 15) 2-18. SENSOR BOARD (Page 21)
2-9. COVER (CDM)
(Page 17)
2-11. POWER BOARD SECTION
(Page 18)
2-13. SUBWOOFER BOARD,
POWER BOARD
(Page 19)
2-14. POWER TRANSFORMER
(T1200)
(Page 19)
2-12. MAIN BOARD
(Page 18)
2-6. TAPE MECHANISM DECK,
MIC BOARD,
USB CONNECTOR BOARD
(Page 15)
2-8. CD-SW BOARD
(Page 16)
2-7. PANEL BOARD,
FUNCTION BOARD,
JOG BOARD
(Page 16)

13
HCD-GTX88
2-2. LOADING PANEL
Note : Follow the disassembly procedure in the numerical order given.
2-1. CASE (TOP)
1 screw
(case 3 TP2)
6 screw
(case 3 TP2)
2 two screws
(case 3 TP2)
7 two screws
(case 3 TP2)
4
9
qs
3
two screws
(+BVTP 3
× 10)
8 two screws
(+BVTP 3
× 10)
qa two screws
(+BVTP 3
× 10)
qd case (top)
5 panel (side-R)
0 panel (side-L)
3 loading panel
2 Pull-out the disc tray.
1 Turn the pulley to the direction of the arrow.
pulley
Front panel side
CD mechanism deck (CDM74KF)

14
HCD-GTX88
2-3. TUNER PACK
2-4. CD BLOCK SECTION
3 tuner pack
2 wire (flat type) (9 core)
(CN1)
1 two screws
(+BVTP 3 × 8)
1 screw
(+BVTP 3 × 8)
5 three screws
(+BVTP 3 × 12)
2 lug
3 tapping screw
4 tapping screw
6 wire (flat type) (13 core)
(CN701)
qs CD block section
7
9 wire (flat type) (21 core)
(CN5053)
0 CN903 (5P)
qa CN901 (2P)
8 wire (flat type) (27 core)
(CN5051)

15
HCD-GTX88
2-6. TAPE MECHANISM DECK, MIC BOARD, USB CONNECTOR BOARD
2-5. FRONT PANEL SECTION
0 front panel section
3
2 three screws
(+BVTP 3 × 8)
1 three screws
(+BVTP 3 × 8)
4 wire (flat type) (17 core)
(CN508)
5 wire (flat type) (11 core)
(CN509)
7 CN503 (3P)
8 CN507 (8P)
9 CN903 (3P)
6 CN100 (4P)
1 three screws
(+BVTP 2.6 (3CR))
2 three screws
(+BVTP 2.6 (3CR))
5 two screws
(+BVTP 2.6 (3CR))
7 two screws
(+BVTP 2.6 (3CR))
9 two screws
(+BVTP 2.6 (3CR))
0 USB CONNECTOR board
bracket (MIC shield)
8 MIC board
6
3
tape mechanism deck
4 knob (MIC)

16
HCD-GTX88
2-7. PANEL BOARD, FUNCTION BOARD, JOG BOARD
2-8. CD-SW BOARD
2 two screws
(+BVTP 2.6 (3CR))
3 two screws
(+BVTP 2.6 (3CR))
8 five screws
(+BVTP 2.6 (3CR))
9 four screws
(+BVTP 2.6 (3CR))
0 six screws
(+BVTP 2.6 (3CR))
qj three screws
(+BVTP 2.6 (3CR))
4 PANEL board
qa PANEL board
qs knob (volume)
qd nut
qf holder (jog)
qg knob jog assy
qh gear (encoder)
qk JOG board
1 CN956 (2P)
6 CN905 (2P)
7 CN904 (3P)
5 wire (flat type) (25 core)
(CN900)
2
1
two screws
(+BVTP 2.6 (3CR)
)
3 two screws
(+BTTP (M2.6))
4 three screws
(+BTTP (M2.6))
5 CD-SW board
6 escucheon (CD)

17
HCD-GTX88
2-10. BACK PANEL SECTION
2-9. COVER (CDM)
1 two screws
(+BVTP 3
× 10)
3 cover (CDM)
CD mechanism dec
k
2 screw
(+BVTP 3
× 10)
5 four screws
(+BVTP 3 × 10)
7 two screws
(+BVTP 3 × 10)
8 three screws
(+BVTP 3 × 10)
6 two screws
(+BVTP 3 × 10)
4 wire (flat type) (17 core)
(CN1502)
1 CN1200 (3P)
2 CN1204 (4P)
3 CN1202 (2P)
9 CN580 (3P)
0 back panel section

18
HCD-GTX88
2-11. POWER BOARD SECTION
2-12. MAIN BOARD
2 two screws
(+BV3 (3-CR))
7 two screws
(+BV3 (3-CR)
)
8 screw
(+BV3 (3-CR))
9 screw
(+BV3 (3-CR))
3 DC fan(M892)
6 three screws
(+BVTP 3 × 10)
0 two screws
(+BVTP 3 × 10)
qa POWER board section
1 CN581 (3P)
4 CN1214 (6P)
5 CN1212 (7P)
1 screw
(+BVTP 3
× 10)
2 MAIN boar
d
POWER board assy
CN600
CN601
CN700

19
HCD-GTX88
2-14. POWER TRANSFORMER (T1200)
2-13. SUBWOOFER BOARD, POWER BOARD
1 two screws
(transistor)
9 two screws
(transistor)
qd screw
(+BVTP 3 × 10)
qf bracket
qg POWER board
qs heat sink assy
6 two screws
(+BVTP 3 × 8)
7 holder
2 two screws
(+BVTP 3 × 10)
8 two screws
(+BVTP 3 × 10)
0 two screws
(+BVTP 3 × 10)
qa
5
CN607 (5P)
4 SUBWOOFER board
3 screw
(+BV3 (3-CR))
2 two screws
(+BV3 (3-CR))
7 three screws
8 power transfomer (T1200
)
TRANS board
6 three screws
3 DC fan(M892)
4 CN1214 (6P)
5 CN1212 (7P)
1 CN581 (3P)

20
HCD-GTX88
2-15. BD91 BOARD
2-16. DRIVER BOARD, SW BOARD, USB BOARD
3 BD91 board
2 Remove the four solders.
1 wire (flat type) (16 core)
(CN301)
2 CN703 (4P)
3 CN704 (2P)
5 DRIVER board
7 SW board
1 two screws
(+BVTT (M2.6))
6 screw
(+BVTT (M2.6))
8 two screws
(+BVTP2.6 (3CR))
9 USB board
4 wire (flat type) (5 core)
(CN702)