Sony HCD-GT444 User manual

SERVICE MANUAL
Sony Corporation
Audio Business Group
Published by Sony Techno Create Corporation
HCD-GT111/GT222/
GT444/GT555
SPECIFICATIONS
COMPACT DISC DECK RECEIVER
9-889-112-01
2008D05-1
© 2008.04
AEP Model
HCD-GT111/GT222/GT444
UK Model
HCD-GT444
E Model
Russian Model
HCD-GT111/GT222/GT444/GT555
Ver. 1.0 2008.04
• HCD-GT111 is the amplifier, USB, CD player, tape
deck and tuner section in MHC-GT111.
• HCD-GT222 is the amplifier, USB, CD player, tape
deck and tuner section in MHC-GT222.
• HCD-GT444 is the amplifier, USB, CD player, tape
deck and tuner section in MHC-GT444.
• HCD-GT555 is the amplifier, USB, CD player, tape
deck and tuner section in MHC-GT555. Photo: HCD-GT555
CD
Section
Model Name Using Similar Mechanism NEW
Mechanism Type CDM88A-K6BD93-WOD
Optical Pick-up Block Name KSM-213DCP
Tape deck
Section Model Name Using Similar Mechanism HCD-EC55/EC77
Tape Transport Mechanism Type TCM-J1 or CS-21SC-900TP
Amplifier section
HCD-GT555
The following are measured at AC 120, 127,
220, 230 – 240 V 50/60 Hz
Front speaker
Power output (rated): 110 W + 110 W
(at 6 Ω, 1 kHz, 1% THD)
RMS output power (reference):
200W + 200 W (per channel at 6 Ω,
1kHz,10%THD)
Subwoofer
RMS output power (reference): 190 W
(at 6 Ω,100Hz,10%THD)
HCD-GT444
The following are measured at AC 120, 127,
220, 230 – 240 V 50/60 Hz
Front speaker
Power output (rated): 90 W + 90 W
(at 6 Ω, 1 kHz, 1% THD)
RMS output power (reference):
150 W + 150 W (per channel at 6 Ω,
1 kHz, 10% THD)
Subwoofer
RMS output power (reference): 150 W
(at 6 Ω, 100 Hz, 10% THD)
HCD-GT222
The following are measured at AC 120, 127,
220, 230 – 240V 50/60 Hz
Power output (rated): 110 W + 110 W
(at 6 Ω, 1 kHz, 1% THD)
RMS output power (reference):
200 W + 200 W (per channel at 6 Ω,
1 kHz, 10% THD)
HCD-GT111
The following are measured at AC 120, 127,
220, 230 – 240V 50/60 Hz
Power output (rated): 60 W + 60 W
(at 6 Ω, 1 kHz, 1% THD)
RMS output power (reference):
100 W + 100 W (per channel at 6 Ω,
1 kHz, 10% THD)
Inputs
AUDIO INPUT L/R : voltage
250 mV, impedance 47 kilohms
MIC: sensitivity 1 mV, impedance
10 kilohms
(USB) port: Type A
Outputs
PHONES: accepts headphones of 8 Ωor
more
FRONT SPEAKER: accepts impedance of
6Ω
SUBWOOFER (HCD-GT555/
HCD-GT444 only): accepts
impedance of 6 Ω
USB section
Supported bit rate
MP3 (MPEG 1 Audio Layer-3):
32 – 320 kbps, VBR
WMA: 32 – 192 kbps, VBR
AAC: 48 – 320 kbps
Sampling frequencies
MP3 (MPEG 1 Audio Layer-3):
32/44.1/48 kHz
WMA: 44.1 kHz
AAC: 44.1 kHz
Transfer speed
Full-Speed
Supported USB device
Mass Storage Class
Maximum current
500 mA
CD player section
System: Compact disc and digital audio
system
Laser Diode Properties
Emission Duration: Continuous
Laser Output*: Less than 44.6 μW
* Thisoutputisthevaluemeasurement
at a distance of 200 mm from the
objective lens surface on the Optical
Pick-up Block with 7 mm aperture.
Frequency response: 20 Hz – 20 kHz
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 88 dB
Tape deck section
Recording system: 4-track 2-channel, stereo
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range:
87.5 – 108.0 MHz (50 kHz step)
Antenna: FM lead antenna
Antenna terminals: 75 ohms unbalanced
Intermediate frequency: 10.7 MHz
AM tuner section
Tuning range
Pan American and Oceanian models:
530 – 1,710 kHz (with 10 kHz tuning
interval)
531 – 1,710 kHz (with 9 kHz tuning
interval)
European and Russian models:
531 – 1,602 kHz (with 9 kHz tuning
interval)
Other models:
530 – 1,610 kHz (with 10 kHz tuning
interval)
531 – 1,602 kHz (with 9 kHz tuning
interval)
Antenna:AMloopantenna,externalantenna
terminal
Intermediate frequency: 450 kHz
Mexican model: AC 127 V, 60 Hz
Argentine model: AC 220 V, 50/60 Hz
Other models: AC 120, 220 or 230 –
240 V, 50/60 Hz, Adjustable with
voltage selector
Power consumption
HCD-GT555: 216 W
HCD-GT444: 286 W
HCD-GT222: 163 W
HCD-GT111: 150 W
Dimensions (w/h/d) (excl. speakers)
Approx. 231 × 361 × 437.5 mm
(9 1/8 × 14 1/4 × 17 1/4 inch)
Mass (excl. speakers)
HCD-GT555/GT444/GT222
(Except European model),
HCD-ZT4: 10.0 kg (22 lb 1 oz)
HCD-GT222 (European model):
9.6 kg
HCD-GT111: 8.0 kg
Design and specifications are subject to
change without notice.
General
Power requirements
European and Russian models:
AC 230 V, 50/60 Hz
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
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HCD-GT111/GT222/GT444/GT555
2
1. SERVICING NOTES ............................................. 3
2. GENERAL .................................................................. 7
3. DISASSEMBLY
3-1. Disassembly Flow........................................................... 9
3-2. Side-L/R Case................................................................. 10
3-3. Top Panel Block.............................................................. 10
3-4. Tape Mechanism Deck.................................................... 11
3-5. Front Panel Block ........................................................... 11
3-6. Back Panel ...................................................................... 12
3-7. MAIN Board................................................................... 12
3-8. CD Mechanism Block..................................................... 13
3-9. POWERAMP Board....................................................... 13
3-10. Base Unit......................................................................... 14
3-11. OP Base Assy (KSM-213D) ........................................... 14
3-12. Belt (DLM3A) ................................................................ 15
4. TEST MODE ............................................................ 16
5. MECHANICAL ADJUSTMENTS ...................... 20
6. ELECTRICAL ADJUSTMENTS ........................ 21
7. DIAGRAMS
7-1. Block Diagram - CD SERVO, USB Section -................ 23
7-2. Block Diagram - MAIN Section -................................... 24
7-3. Block Diagram - AMP Section -..................................... 25
7-4. Block Diagram
- PANEL, POWER SUPPLY Section -........................... 26
7-5. Schematic Diagram - CD Board (1/2) -.......................... 28
7-6. Schematic Diagram - CD Board (2/2) -.......................... 29
7-7. Printed Wiring Board - CD Board -................................ 30
7-8. Printed Wiring Board - TC Board -................................. 31
7-9. Schematic Diagram - TC Board -................................... 31
7-10. Printed Wiring Board - USB Board -.............................. 32
7-11. Schematic Diagram - USB Board -................................. 33
7-12. Printed Wiring Boards - REG Section -.......................... 34
7-13. Schematic Diagram - REG Section -.............................. 34
7-14. Printed Wiring Board - MAIN Board -........................... 35
7-15. Schematic Diagram - MAIN Board (1/4) -..................... 36
7-16. Schematic Diagram - MAIN Board (2/4) -..................... 37
TABLE OF CONTENTS
SAFETY-RELATED COMPONET 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.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of 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.
This appliance is
classified as a CLASS 1
LASER product. This
markingislocatedonthe
rear exterior.
CAUTION
Use of controls or adjustments or performance of procedures other than
those specified herein may result in hazardous radiation exposure.
7-17. Schematic Diagram - MAIN Board (3/4) -..................... 38
7-18. Schematic Diagram - MAIN Board (4/4) -..................... 39
7-19. Printed Wiring Boards - JACK Section -........................ 40
7-20. Schematic Diagram - JACK Section -............................ 40
7-21. Printed Wiring Board - POWERAMP Board -............... 41
7-22. Schematic Diagram - POWERAMP Board (1/2) -......... 42
7-23. Schematic Diagram - POWERAMP Board (2/2) -......... 43
7-24. Printed Wiring Board - DISPLAY Board -..................... 44
7-25. Schematic Diagram - DISPLAY Board -........................ 45
7-26. Printed Wiring Boards - PANEL Section - ..................... 46
7-27. Schematic Diagram - PANEL Section -.......................... 47
7-28. Printed Wiring Board
- TRANS1 Board (GT111: 120V AC area in E, 240V AC
area in E, Chilean and Peruvian models) -...................... 48
7-29. Schematic Diagram - TRANS1 Board
(GT111: 120VAC area in E, 240VAC area in E,
Chilean and Peruvian models) -...................................... 49
7-30. Printed Wiring Board - TRANS2 Board
(GT222/GT444/GT555) -............................................... 50
7-31. Schematic Diagram - TRANS2 Board
(GT222/GT444/GT555) -............................................... 51
7-32. Printed Wiring Board - TRANSX Board
(GT111:AEP, Russian and Argentina models) -............. 52
7-33. Schematic Diagram - TRANSX Board
(GT111:AEP, Russian and Argentina models) -............. 53
8. EXPLODED VIEWS
8-1. Case Section.................................................................... 63
8-2. Loading Panel Section.................................................... 64
8-3. DISPLAY Board Section ................................................ 65
8-4. Front Panel Section......................................................... 66
8-5. Meter Display Assy......................................................... 67
8-6. Top Panel Section ........................................................... 68
8-7. Back Panel Section ......................................................... 69
8-8. MAIN Board Section...................................................... 70
8-9. Chassis Section............................................................... 71
8-10. CD Mechanism Section (CDM88A-K6BD93-WOD).... 72
9. ELECTRICAL PARTS LIST .............................. 73
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
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HCD-GT111/GT222/GT444/GT555
3
SECTION 1
SERVICING NOTES
Model Part No.
GT555: E2 3-287-080-0[]
GT444: E2 3-287-080-1[]
GT222: E2 3-287-080-2[]
GT111: E2 3-287-080-3[]
GT555: MX 3-287-081-0[]
GT444: MX 3-287-081-1[]
GT222: MX 3-287-081-2[]
GT111: E3 3-287-082-0[]
GT555: AR 3-287-085-0[]
GT444: AR 3-287-085-1[]
GT222: AR 3-287-085-2[]
GT111: AR 3-287-085-3[]
GT555: E51 3-287-086-0[]
GT444: E51 3-287-086-1[]
GT222: E51 3-287-086-2[]
GT111: E51 3-287-086-3[]
GT111: AEP 3-287-088-0[]
GT222: AEP 3-287-088-1[]
GT444: AEP, UK 3-287-088-2[]
GT111: RU 3-287-090-0[]
GT222: RU 3-287-090-1[]
GT444: RU 3-287-090-2[]
GT555: RU 3-287-090-3[]
MODEL IDENTIFICATION
– Back Panel –
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostat-
ic 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
pickup block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
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 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 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.
RELEASING THE DISC TRAY LOCK
The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
Releasing Procedure:
1. Press [I/1] button to turn the power on.
2. Press the [CD] button to select CD function.
3. While pressing the [x] button, press the [Z] button for more 5
seconds).
4. The message “UNLOCKED” is displayed and the disc tray is
unlocked.
Note: When “LOCKED”is displayed, the slot lock is not released by
turning power on/off with the [I/1]button.
MODEL
NUMB
E
LABEL
• Abbreviation
AR : Argentina model
E2 : 120V AC area in E model
E3 : 240V AC area in E model
E51 : Chilean and Peruvian models
MX : Mexican model
RU : Russian model
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HCD-GT111/GT222/GT444/GT555
4
HOW TO REMOVE THE KNOB VOLUME
HOW TO OPEN THE TRAY WHEN POWER SWITCH TURN OFF
Pull the tray by the hand.
Turn a gear by
a driver till a lever
falls down to the
position of the figure.
lever
gear
hole
knob volume
hole
front panel block
(back view)
Push the knob volume by the flat head driver.
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
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HCD-GT111/GT222/GT444/GT555
5
CAPACITOR DISCHARGE FOR ELECTRIC SHOCK PREVENTION
POWERAMP board
POWERAMP board
C803
C804
In checking the MAIN board, make a capacitor discharge
of C803 and C804 for electric shock prevention.
800 Ω/2W
800 Ω/2W
CD MECHANISM BLOCK SERVICE POSITION
CD mechanism block
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http://www.xiaoyu163.com
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HCD-GT111/GT222/GT444/GT555
6
POWERAMP BOARD SERVICE POSITION
CD mechanism block
front panel block
MAIN board
POWERAMP board
TRANS1 board/
TRANS2 board/
TRANSX board
Tape Deck Name Tape Deck Part No. Belt Part No.
TCM-J1 A-1527-851-A 2-670-389-01 BELT (1)
3-214-817-01 BELT (FR)
CS-21SC-900TP 1-797-575-11 2-688-621-01 BELT (R/F)
2-688-622-01 BELT (MAIN)
HOW TO DISTINGUISH TAPE MECHANISM DECK
Two kinds of tape mechanism decks installed by this set exist.
Please do the repair exchange after confirming which tape mechanism deck set of the repair according to how to distinguish the figure
below.
motor
Metal part: TCM-J1
Mold part: CS-21SC-900TP
tape deck
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http://www.xiaoyu163.com
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HCD-GT111/GT222/GT444/GT555
7
SECTION 2
GENERAL This section is extracted
from instruction manual.
Guide to parts and controls
This manual mainly explains operations using the remote, but the same operations can also be performed using the buttons on the unit having the same or similar
names.
Unit
Front view
* HCD-GT555 and HCD-GT444 only
Top view
CD
TUNER/
BAND
TAPE
AUDIO
USB






XG
XE
XH
XT
XB
X
RM
RL
RKRI
RH
RG
RE
RT
RB R


*
XK
XI

 (on/standby)
Press to turn on the system.
The STANDBY indicator lights up when
the system is turned off.
#
DISPLAY
Press to change the information on the
display.
$
METER MODE
Press to select the preset meter display.
%
OPTIONS
Press to change the display, USB and
MP3 BOOSTER+ settings.
&
ERASE
Pressto erase audio filesand foldersfrom
the connected optional USB device.
'
Remote sensor
(+/– (select folder)
Press to select a folder.
N.(rewind/fast forward)
Press to find a point in a track.
/9(play/pause)
Press to start or pause playback.
Y(stop)
Press to stop playback.
TUNING +/–
Press to tune in the station you want.
(go back/go forward)
Press to select a track or file.
)
CD
Press to select the CD function.
TUNER/BAND
Press to select the TUNER function.
Press to select the FM or AM band.
TAPE
Press to select the TAPE function.
AUDIO
Press to select the AUDIO function.
Press to select the USB function.
*
HCD-GT555 and HCD-GT444 only
SUBWOOFER
Press to turn on and off the subwoofer.
The SUBWOOFER indicator lights up
when the subwoofer is turned on.
+
REC TIMER
Press to set the Recording Timer.
,
RETURN
Press to return to the parent folder.
Press to exit search mode.
-
ENTER
Press to enter the settings.
USB
.
DISC SKIP/EX-CHANGE
Press to select a disc. Press to exchange a
disc while playing.
/
PHONES jack
Connect the headphones.
0
AUDIO INPUT L/R jacks
Connect to an audio component
(Portable audio player, etc.).
1(USB) indicator
Lights up in red when transferring to the
connected optional USB device or when
erasing audio files or folders.
(USB) port
Connect an optional USB device.
2
MIC jack
Connect an optional microphone.
MIC LEVEL
Turn to adjust the microphone volume.
3
Disc tray
4
;OPEN/CLOSE
Press to insert or eject a disc.
5
REC TO
Press to transfer onto the connected
optional USB device.
6
DISC 1 – 3
Presstoselectadisc.Presstoswitchtothe
CD function from other function.
7
MASTER VOLUME
Turn to adjust the volume.
8
OPERATION DIAL
Turn to select a setting in the OPTIONS
menu.
Turn to select a track, file or folder.
9
PRESET EQ, GROOVE, SURROUND
Press to select a sound effect.
EQ BAND
Press to select the frequency band.
:
Display
;
Tape deck
XK
[(record)
Press to record onto a tape.
#(play)
Press to start tape playback.
*The#button has a tactile dot. Use the tactile
dot as a reference when operating the system.
N.(rewind/fast forward)
Press to rewind/fast forward a tape.
USB
Y;(stop/eject)
Press to stop tape playback.
Press to insert or eject a tape.
9(pause)
Press to pause tape playback.
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http://www.xiaoyu163.com
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HCD-GT111/GT222/GT444/GT555
8
Remote RM-AMU006 
 (on/standby)
Press to turn on the system.
#
CLOCK/TIMER SELECT
CLOCK/TIMER SET
Press to set the clock and the timers.
$
REPEAT/FM MODE
Presstolistentoadisc,anUSBdevice,a
single track or file repeatedly.
Press to select the FM reception mode
(monaural or stereo).










RH
RG
RE
RT
RB
R
%
USB
Press to select the USB function.
CD
Press to select the CD function.
TUNER/BAND
Press to select the TUNER function.
Press to select the FM or AM band.
FUNCTION
Press to select a function.
&
(go back/go forward)
Press to select a track or file.
N.(rewind/fast forward)
Press to find a point in a track or file.
+/– (tuning)
Press to tune in the station you want.
/(play)
Press to start playback.
9(pause)
Press to pause playback.
Y(stop)
Press to stop playback.
'
ENTER
Press to enter the settings.
(
DISC SKIP
Press to select a disc.
)+/– (select folder)
Press to select a folder.
*
VOLUME +/–*
Press to adjust the volume.
* The VOLUME + button has a tactile dot. Use
the tactile dot as a reference when operating
the system.
+
EQ
Presstoselectasoundeffect.
,
CLEAR
Press to delete the last step from the
program list.
-
TUNER MEMORY
Press to preset the radio station.
.
PLAY MODE/TUNING MODE
Press to select the play mode of an
AUDIO CD, MP3 disc or an optional
USB device.
Press to select the tuning mode.
/
DISPLAY
Press to change the information on the
display.
0
SLEEP
Press to set the Sleep Timer.
Hooking up the system securely
To FM lead antenna
To AM loop antenna
To subwoofer
To front speaker (left)
To front speaker (right)
a) TheFM75 ΩCOAXIALjackvariesaccordingto
models.
c) HCD-GT555 and HCD-GT444 only.
d) The VOLTAGE SELECTOR varies according to
models.
Getting Started
ANTENNA
DMPORT
SUBWOOFER
FRONT SPEAKER
$
&
'
%
"





d)
a)
c) VOLTAGE
SELECTOR
"Antennas
Find a location and an orientation that
provide good reception, and then set up
the antennas.
Keep the antennas away from the speaker
cords, the power cord and the USB cable
to avoid picking up noise.
$Subwoofer (HCD-GT555 and
HCD-GT444 only)
Be sure to insert the connector straight
into the terminals.
%Front speakers
Be sure to insert the connector straight
into the terminals.
&VOLTAGE SELECTOR
For models with a voltage selector, set
VOLTAGE SELECTOR to the local
power line voltage.
'Power
Connect the power cord to a wall socket.
Thedemonstration appears inthedisplay.
If the plug does not fit the wall socket,
detachthesupplied plug adaptor(onlyfor
models equipped with an adaptor).
When carrying this system
Use the buttons on the unit for this
operation.
1Remove all discs to protect the CD
mechanism.
2Press CD to select the CD function.
3Hold down DISC SKIP/
EX-CHANGE, and press  until
“STANDBY” appears.
4After “MECHA LOCK” appears,
unplug the power cord.
Extend the FM lead
antenna horizontally
AM loop antenna
SUBWOOFER
Purple
IMPEDANCEUSE 6Ω
RL
FRONTSPEAKER
White
Speaker pads
Attach the supplied speaker pads to the
bottom of the front speakers and
subwoofer to prevent slipping.
Front speakers:
4 pads for each speaker
Subwoofer:
4 pads (HCD-GT555 and HCD-GT444
only)
To use the remote
Slide and remove the battery
compartment lid, then, insert the two
supplied R6 (size AA) batteries, &side
first, matching the polarities shown
below.
Notes
• With normal use, the batteries should last for
about six months.
• Do not mix an old battery with a new one or
mix different types of batteries.
• If you do not use the remote for a long period
of time, remove the batteries to avoid damage
from battery leakage and corrosion.
Setting the clock
You cannot set the clock in Power Saving
Mode.
Use the buttons on the remote for this
operation.
1Press  to turn on the system.
2Press CLOCK/TIMER SET.
If “PLAY SET” appears on the
display, press /
“CLOCK SET” and then press
ENTER (RM-AMU006) or
(RM-AMU008).
3Press /repeatedly to
set the hour, and then press
ENTER.
4Use the same procedure to set
the minutes.
The clock settings are lost when you
disconnect the power cord or if a
power failure occurs.
To display the clock when the
system is turned off
PressDISPLAYrepeatedlyuntiltheclock
is displayed. The clock is displayed for
about 8 seconds.
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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HCD-GT111/GT222/GT444/GT555
9
SECTION 3
DISASSEMBLY
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
3-2. SIDE-L/R CASE
(Page 10)
3-3. TOP PANEL BLOCK
(Page 10)
3-6. BACK PANEL
(Page 12)
3-9. POWERAMP BOARD
(Page 13)
3-5. FRONT PANEL BLOCK
(Page 11) 3-4. TAPE MECHANISM DECK (Page 11)
3-7. MAIN BOARD
(Page 12) 3-8. CD MECHANISM BLOCK (Page 13)
3-10. BASE UNIT
(Page 14)
3-11. OP BASE ASSY (KSM-213D)
(Page 14)
3-12. BELT (DLM3A)
(Page 15)
SET
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
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HCD-GT111/GT222/GT444/GT555
10
Note: Follow the disassembly procedure in the numerical order given.
3-2. SIDE-L/R CASE
3-3. TOP PANEL BLOCK
four screws
(BVTP3
×10)
three screws
(BVTP3
×10)
four screws
(case3 TP)
side-L case
side-R case four screws
(case3 TP)
screw
(BVTP3
×10)
top panel block
flexible flat cable
(CN450)
two claws 
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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HCD-GT111/GT222/GT444/GT555
11
connector (CN470)
screw
(BVTP3
×10)
RT screw
(BVTP3
×10)
RB harness
RE two harnesses
connector (CN488)
connector (CN903)
flexible flat cable (CNCN403)
screw (BVTP3 ×10)
RG front panel block
two screws
(BVTP3
×10)
panel loading
screw
(BVTP3
×10)
Pull the
tray by hand.
hole
Turn a gear by
a driver till a lever
falls down to the
position of the figure.
lever
gear
3-5. FRONT PANEL BLOCK
3-4. TAPE MECHANISM DECK
Note: This illustration is seeing top panel block from inside.
two screws
(BVTP3
×12: AEP, UK, Russian)
(BVTP3
×8: except AEP, UK, Russian)
(AEP, UK, Russian)
connector (CN501)
top panel block
two screws
(BVTP2.6
×8)
two screws
(BVTP2.6
×8) bracket (deck)
TC board
two bracket (PWB)
TC shield board
tape mechanism deck
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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HCD-GT111/GT222/GT444/GT555
12
3-6. BACK PANEL
connector (CN690)
power cord connector
(CN901)
XT power cord
RG DC fan (M102)
RE two screws
(BVTP3
×12)
RI wiring bstopper
RH screw (BVTP3 ×10)
RL ferrite core
XB cord
bushing
X bushing bracket
RM two screws (BVTP3 ×10)
RT tuner
(FM/AM)
flexible flat cable
(11core (GT111: AEP/GT222: AEP/
GT444: AEP, UK)/
9 core (GT111: RU, E2, E3, E51, AR/
GT222: RU, E2, E51, MX, AR/
GT444: RU, E2, E51, MX, AR/
GT555)))
RK Cut the clamp.
two screws
(BVTP3
×8)

RB screw
(BVTP3
×10)
screw
(BVTP3
×10)
screw
(BVTP3
×10)
five screws
(BVTP3
×10)
back panel
connector
(CN890)
SW JACK
board
(GT444/GT555)
3-7. MAIN BOARD
two screws
(BVTP3
×10)
MAIN board

wire (flat type) (13 core)
(CN410)
connector
(CN907)
connector
(CN055)
wire (flat type) (31 core)
(CN430)
flexible flat cable (21 core)
(CN420)
fan connector
(CN110)
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
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HCD-GT111/GT222/GT444/GT555
13
3-8. CD MECHANISM BLOCK
3-9. POWERAMP BOARD
Note: When installing the CD mechanism section,
install two tapes for prevention of noise.
two screws
(BVTP3
×10)
screw
(BVTP3
×10)
two screws
(BVTP3
×10)
screw
(BVTP3
×10)
four screws
(BVTP3
×10)
two saranet cushions
RT CD mechanism block
RB three sheets
wire (flat type) (31 core)
(MAIN board: CN430/CD board: CN201)
chassis
wire (flat type) (13 core)
(MOTOR board/MAIN board: CN410)
two screws
(BVTP3
×10)
two screws
(transistor)
RB two screws
(BVTP3
×10)
connector (CN903)
RT POWERAMP board
screw
(BVTP3
×10) two screws
(BVTP3
×10)
two screws
(BVTP3
×10)
two screws
(BVTP3
×10)
bracket (fan)
fan (M101)
(GT222/GT444/GT555)

heat sink block
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
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HCD-GT111/GT222/GT444/GT555
14
3-10. BASE UNIT
CD mechanism block
insulator
insulator
base unit
insulator
insulator
two springs
(insulator)
two screws (PTPWHM2.6)
two screws (PTPWHM2.6)

– Bottom view –
two springs (insulator)
two polyethylene washers
Remove four solders.
flexible flat cable (16 core)
(CD board: CN301/optical pick-up block)
CD board
OP base assy
(KSM-213D)
3-11. OP BASE ASSY (KSM-213D)
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
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HCD-GT111/GT222/GT444/GT555
15
four screws
cover
two belts (DLM3A)
belt
belt
position of belt
3-12. BELT (DLM3A)
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

HCD-GT111/GT222/GT444/GT555
16
SECTION 4
TEST MODE
PANEL TEST MODE
This mode is used to check the fluorescent indicator tube, LEDs,
keys, [MASTER VOLUME] jog, [OPERATION DIAL] jog, mod-
el, destination and software version.
Procedure:
1. Press [x] button, [METER MODE] button and [DISC 2] but-
ton simultaneously.
2. All LEDs and segments in fluorescent indicator tube are lighted
up. The POWER LED is lighted up in red color if the system is
turned off and POWER LED is turn off if the system is turned
on.
3. When you want to enter to the software version display mode,
press [DISC 1] button. The model information appears on
the fluorescent indicator tube. “GSL 1R” is shown for HCD-
GT111, “GSL 2R” is shown for HCD-GT222, “GSL 2RS” is
shown for HCD-GT444 and “GSL 3RS” is shown for HCD-
GT555. Press [DISC 1] button again to view the destination
information.
4. During the destination information display, press [DISC 1]
button. Each time [DISC 1] button is pressed, the fluorescent
indicator tube shows the version of each category software in
the following sequence: SC, GC, SYS, CD, CDDM, CDMA,
CDMB, BDA, BDB, ST, TC, TA, TM, MM1, MM2 (USB
Micro computer) , MTR (METER) and return back to model
information display.
5. When [DISC 3] button is pressed while the version numbers
are being displayed except model and destination, the date
of the software creation appears. When [DISC 3] button is
pressed again, the display returns to the software version dis-
play. When [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 dis-
play.
6. Press [DISC 2] button, the key check mode is activated.
7. In the key check mode, the fluorescent indicator tube displays
“K 0 J0 V0”.
Each time a button is pressed, “K” value increases. However,
once a button has been pressed, it is no longer taken into ac-
count.
“V” value increases in the manner of 0,1, 2, 3 ... if [MASTER
VOLUME] knob is turned clockwise, or it decreases in the
manner of 0, 9, 8,7 ... if [MASTER VOLUME] knob is turned
counterclockwise.
“J” value increases in the manner of 0,1, 2, 3 ... if [OPERA-
TION DIAL] knob is turned clockwise, or it decreases in the
manner of 0, 9, 8,7 ... if [OPERATION DIAL] knob is turned
counterclockwise.
8. When [DISC SKIP/EX-CHANGE] button is pressed after all
LEDs and segments in fluorescent indicator tube light up, al-
ternate segments in fluorescent indicator tube and LEDs would
light up. If you press [DISC SKIP/EX-CHANGE] button
again, another half of alternate segments in fluorescent indica-
tor tube and LEDs would light up. Pressing [DISC SKIP/EX-
CHANGE] button again would cause all segments in fluores-
cent indicator tube and LEDs light up.
9. To release from this mode, press three buttons in the same
manner as step 1, or disconnect the power cord.
COMMON TEST MODE
This mode is used to check operations of the respective sections of
Amplifier and Tape.
To enter Common Test Mode
Procedure:
1. Press [x] button, [METER MODE] button and [DISC 3] but-
ton simultaneously.
2. The CD ring indicators flash on the fluorescent indicator tube.
The function is changed to AUDIO and the volume is changed
to VOLUME MIN.
Check of Amplifier
Procedure:
1. Press [EQ BAND] button repeatedly until a message “GEQ
MAX” appears on the fluorescent indicator tube. GEQ increas-
es to its maximum.
2. Press [EQ BAND] button repeatedly until a message “GEQ
MIN” appears on the fluorescent indicator tube. GEQ decreas-
es to its minimum.
3. Press [EQ BAND] button repeatedly until a message “GEQ
FLAT” appears on the fluorescent indicator tube. GEQ is set to
flat.
4. When the [MASTER VOLUME] knob is turned clockwise
even slightly, the sound volume increases to its maximum and
a message “VOLUME MAX” appears on the fluorescent indi-
cator tube.
5. When the [MASTER VOLUME] knob is turned counterclock-
wise even slightly, the sound volume decreases to its minimum
and a message “VOLUME MIN” appears on the fluorescent
indicator tube.
Tape function
When a tape is inserted in deck and recording is started, the func-
tion is changed to AUDIO.
To release from Common Test mode
Procedure:
1. To release from this mode, press [?/1] button.
2. The cold reset is enforced at the same time.
COLD RESET
The cold reset clears all data including preset data stored in the
EEPROM to initial conditions. Execute this mode when returning
the set to the customer.
Procedure:
1. Press [?/1] button to turn on the system.
2. Press [x] button, [ENTER] button, and [?/1] button simulta-
neously.
3. “COLD RESET” appears on the fluorescent indicator tube.
After that, the fluorescent indicator tube becomes blank for a
while, and the system is reset.
VACS ON/OFF
This mode is used to switch ON and OFF the VACS (Variable At-
tenuation Control System).
Procedure:
1. Press [?/1] button to turn on the system.
2. Press [x] button, [DISC 2], and [DISPLAY] button simultane-
ously. The message “VACS OFF” or “VACS ON” appears on
the fluorescent indicator tube.
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
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HCD-GT111/GT222/GT444/GT555
17
TUNER STEP CHANGE
(Except GT111: AEP, Russian/GT222: AEP, Russian/
GT444: AEP, Ruissian, UK/GT555: Russian models)
The step interval of AM channels can be toggled between 9 kHz
and 10 kHz. This mode is not available for Saudi Arabian, Euro-
pean and Russian models.
Procedure:
1. Press [?/1] button to turn on the system.
2. Press [TUNER/BAND] button repeatedly to select the “AM”.
3. Press [?/1] button to turn off the system.
4. Press [ENTER] button and [?/1] button simultaneously. The
system turns on automatically. The message “AM 9K STEP”
or “AM 10K STEP” appears on the fluorescent indicator tube
and thus the channel step is changed.
CD SERVICE MODE
This mode let you move the CD sled motor freely. Use this mode
when you want to clean the optical pick-up.
Procedure:
1. Press [?/1] button to turn on the system.
2. Press [CD] button to select CD function.
3. Press [x] button, [METER MODE] button, and [OPEN/
CLOSE] button simultaneously.
4. The CD service mode is activated. The message “SERVICE
MODE” appears on the fluorescent indicator tube.
5. With the disc in stop status, press [M] to move the optical
pick-up to outside track, or press [m] to move to inside track.
The message “SLED OUT” or “SLED IN” appears on the fluo-
rescent indicator tube.
6. To turn on or off the laser, press [>] button. The message
“LD ON” or “LD OFF” appears on the fluorescent indicator
tube.
7. To release from this mode, press [?/1] button.
CD AGING MODE
This mode can be used for operation check of CD section.
If an error occurs, the aging operation would stops and the status is
displayed. If there were no error occurs, the aging operation would
continue repeatedly.
Procedure:
1. Press [?/1] button to turn on the system.
2. Select CD function.
3. Load three discs on the disc tray.
4. Press [PLAYMODE] button on the remote repeatedly to select
the “ALL DISCS” mode, and press the [REPEAT] button on
the remote repeatedly to select “REPEAT OFF” mode.
5. Press [x] button, [METER MODE] button and [DISC SKIP/
EX-CHANGE] button simultaneously.
6. Aging operation is started.
7. To release from this mode, press [?/1] button or disconnect the
power cord to turn off the system.
•Aging mode sequence:
CD ERROR CODE MODE
Display the CD error code when an error occurred
Procedure:
1. Press [x] button, [METER MODE] button and [DISC 1] but-
ton simultaneously to enter the error code display mode.
2. The fluorescent indicator tube displays the number of total er-
ror.
3. Each time [ m ] or [ M ] button is pressed, display change as
below.
START (from
Disc 1)
Disc Chucking
TOC Reading
Play first track for 2
seconds
Play last track for 2
seconds
EX-CHANGE open/
close
Open the disc tray
Disc skip
Close the disc tray
Change the disc tray
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
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HCD-GT111/GT222/GT444/GT555
18
•Display of no disc errore
D*$$%%&&##00
D* : The number of no disc error (“0” is latest one)
(Press [>] button to display next error)
$$ : Error type
01 : Focus error
02 : GFS error
03 : Setup error
%% : Not used
&& :
00 : No disc judgment without chucking retry.
01 : No disc judgment after chucking retry.
## : The state when judged as no disc
01 : Stop
02 : Setup
03 : TOC reading
04 : Access
05 : Playback
06 : Pause
07 : Manual search (Play)
08 : Manual search (Pause)
CD REPEATS 5 LIMIT OFF MODE
The number of repeat for CD playback is 5 times when the repeat
mode is “REPEAT ALL”. This mode enables CD to repeat play-
back for limitless times.
Procedure:
1. Press [?/1] button to turn on the system.
2. Select CD function.
3. Press [x] button, [CD] button and [DISC 1] button simultane-
ously to enter the CD repeat 5 limit off mode and the fluores-
cent indicator tube displays “LIMIT OFF”.
4. To release from this mode, operate the cold reset. (Refer to the
“COLD RESET”)
CD 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 EE-
PROM to initial conditions during the next AC-In. Use this mode
when returning the set to the customer after repair.
Procedure:
1. Press [?/1] button to turn on the system.
2. Select CD function.
3. Press [x] button, [DISC 1] button and [?/1] button simultane-
ously. The system turns off automatically.
4. After the “STANDBY” blinking display finishes, a message
“MECHA LOCK” is displayed on the fluorescent indicator
tube and the CD ship mode is set.
CD 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 [?/1] button to turn on the system.
2. Select CD function.
3. Press [DISC SKIP/EX-CHANGE] button and [?/1] button si-
multaneously. The system turns off automatically.
4. After the “STANDBY” blinking display finishes, a message
“MECHA LOCK” is displayed on the fluorescent indicator
tube and the CD ship mode is set.
4. To clear the error record, operate the cold reset. (Refer to the
“COLD RESET”)
5. To release from this mode, press the [?/1] button or disconnect
the power plug to turn off the system.
•Display of total error
EM**ED**
EM**: The number of mechanical errors.
ED** : The number of no disc errors after chucking the disc.
•Display of mechanical errors
M*$$%%&&##00
M* : The number of mechanical error (“0” is latest one)
(Press [>] button to display the next error)
$$ : Not used
%% : Loading related error (Second figure is not used)
D : Stop by the problem other than mechanical problem
while closing.
E : Stop by the problem other than mechanical problem
while opening.
C : Stop by the problem other than mechanical problem
while chucking up.
F : Stop by the problem other than mechanical problem
while chucking down.
&& : Emerging error
01 : Stop while chucking up.
02 : Stop while chucking down.
03 : Time-out of EX-CHANGE open.
05 : Time-out of EX-CHANGE close.
## : Not used
Display of
Total Error
Display of
Mechanical
Errors
FF button
A
MS (+)
button
A
MS (+)
button
AMS (—)
button
AMS (—)
button
FR button
FF button FR button
Display of
No Disc
Errors
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

HCD-GT111/GT222/GT444/GT555
19
CD TRAY LOCK MODE
This mode let you lock the disc tray. When this mode is activated,
the disc tray will not open when [OPEN/CLOSE] button or [DISC
SKIP/EX-CHANGE] button is pressed. The message “LOCKED”
will be displayed on the fluorescent indicator tube.
Procedure:
1. Press [?/1] button to turn on the system.
2. Select CD function.
3. Press [x] button and [OPEN/CLOSE] button simultaneously
and hold down until “LOCKED” or “UNLOCKED” displayed
on the fluorescent indicator tube (around 5 seconds).
FACTORY PRESET
This mode is use to load all the factory use preset frequencies into
FM 1-FM 20 and AM 1-AM 10. Originally, frequency of FM 1-
FM 20 and AM 1-AM10 are set to the minimum frequency.
Procedure:
1. Press [?/1] button to turn on the system.
2. Press [TUNER/BAND] button, [x] button, and [DISC 1] but-
ton simultaneously and the message “FACTORY” appears
on the fluorescent indicator tube. The function is changed to
TUNER automatically.
VACS DISPLAY
This mode is used to check the VACS level.
Procedure:
1. Press [?/1] button to turn on the system.
2. Press [ERASE] button, [x] button and [ENTER] button si-
multaneously.
3. The fluorescent indicator tube displays “VACSA”. “A” repre-
sents Conventional VACS (Triggered by signal level)
4. To release from this mode, do the step 2 again.
METER SWITCH TOUCH COUNT DISPLAY
This mode is used to display the total count of meter pointer touch
initial switch and max switch.
Procedure:
1. Press [?/1] button to turn on the system.
2. Press [x] button, [ENTER] button and [DISPLAY] button si-
multaneously.
3. The fluorescent indicator tube displays “IxxxxxMyyyyy”.
“I” represents the Initial Switch touch.
“xxxxx” represents the total count of Initial Switch touch.
(Maximum Value of “xxxxx” = 65535)
“M” represents the Max Switch touch.
“yyyyy” represents the total count of Max Switch touch.
(Maximum Value of “yyyyy” = 65535)
4. To release from this mode, do the step 2 again. The fluorescent
indicator tube displays “MODE OUT”.
METER TEST MODE
This mode is used to check the meter device.
Procedure:
1. Press [?/1] button to turn on the system.
2. Press [x] button, [ENTER] button and [METER MODE] but-
ton simultaneously.
3. Meter Backlight LEDs, Meter Pointer LEDs, Power Illumina-
tor LEDs and fluorescent indicator tube are lighted up.
4. When you want to perform count total step from Initial Switch
to Max Switch operation mode, press [M] button. The me-
ter pointer will move from Initial Switch to Max Switch and
finally move back to the middle position. The total step count
information appears on the fluorescent indicator tube. “xxx
STP yy” is shown.
“xxx” represents the total step.
(Value of “xxx” should between 430 steps to 470 steps)
“yy” represents the status of total step count.
(If total step between 430 steps to 470 steps, “yy” is OK,
Else “yy” is NG)
5. When you want to perform count total step from Max Switch
to Initial Switch operation mode, press [m] button. The me-
ter pointer will move from Max Switch to Initial Switch and
finally move back to the middle position. The total step count
information appears on the fluorescent indicator tube. “xxx
STP yy” is shown.
“xxx” represents the total step.
(Value of “xxx” should between 430 steps to 470 steps)
“yy” represents the status of total step count.
(If total step between 430 steps to 470 steps, “yy” is OK, else
“yy” is NG).
6. To release from this mode, do the step 2 again. The fluorescent
indicator tube displays “TST MODE OUT”.
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T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

HCD-GT111/GT222/GT444/GT555
20
SECTION 5
MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head pinch roller
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head demag-
netizer. (Do not bring the head magnetizer close to the erase
head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, appiy 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 Torque Meter Meter Reading
FWD CQ-102AS 2.0 – 8.0 mN • m (20 to 80 g • cm)
(0.28 – 1.12 oz • inch)
FWD
Back Tension CQ-102C 0.15 – 0.6 mN • m
(1.5 to 6 g • cm)
(0.021 – 0.083 oz • inch)
FF CQ-201AS 5 – 17.7 mN • m (50 to 177 g • cm)
(0.7 – 2.48 oz • inch)
REV CQ-201B 5 – 17.7 mN • m (50 to 177 g • cm)
(0.7 – 2.48 oz • inch)
•Tape Tension Measurement
Mode Tension Meter Meter Reading
FWD CQ-403A more than 80 g
(more than 2.82 oz)
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6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com