Sony HCD-GT22 User manual
SERVICE MANUAL
COMPACT DISC DECK RECEIVER
SPECIFICATIONS
HCD-GT22/GT44/GT55
Photo: HCD-GT55
Ver. 1.0 2007.06
– Continued on next page –
9-887-722-01
2007F05-1
© 2007.06
Sony Corporation
Personal Audio Division
Published by SonyTechno Create Corporation
E Model
HCD-GT22/GT44/GT55
Australian Model
HCD-GT22/GT44
•HCD-GT22is theamplifier,USB,CD player,tape
deck and tuner section in MHC-GT22.
•HCD-GT44is theamplifier,USB,CD player,tape
deck and tuner section in MHC-GT44.
•HCD-GT55is theamplifier,USB,CD player,tape
deck and tuner section in MHC-GT55.
Model Name Using Similar Mechanism NEW
CD CD Mechanism Type CDM74KF-K6BD91UR-WOD
Section Base Unit Name BU-K6BD91UR-WOD74
Optical Pick-up Block Name KSM-213DCP
TAPE Model Name Using Similar Mechanism NEW
Section Tape Transport Mechanism Type CWN42FF609
Amplier section
HCD-GT55
The following are measured at AC 120, 127,
220, 240V 50/60Hz
Front speaker
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)
Subwoofer
RMS output power (reference): 190 W
(at 6 Ω, 80 Hz, 10% THD)
HCD-GT44
The following are measured at AC 120, 127,
220, 240V 50/60Hz
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, 80 Hz, 10% THD)
HCD-GT22
The following are measured at AC 120, 127,
220, 240V 50/60Hz
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)
Inputs
AUDIO (phono jack): voltage 250 mV,
impedance 47 kilohms
MIC (phone jack): sensitivity 1 mV,
impedance 10 kilohms
(USB) port: Type A
Outputs
PHONES (stereo mini jack): accepts
headphones of 8 Ωor more
SPEAKER: accepts impedance of 6 to 16 Ω
SUB WOOFER OUT (HCD-GT55/GT44
only): accepts impedance of 6 to 16 Ω
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
CD player section
System: Compact disc and digital audio
system
Laser: Semiconductor laser (λ=770 –
810 nm)
Emission duration: continuous
Frequency response: 20 Hz – 20 kHz
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 88 dB
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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2
HCD-GT22/GT44/GT55
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
otherthan thosespecifiedherein mayresult inhazardous radiation
exposure.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR 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.
is classified
as a CLASS 1
LASER product.
This marking is
located on the rear
exterior.
This appliance
Tape deck section
Recording system: 4-track 2-channel, stereo
Frequency response: 50 – 13,000 Hz (±3
dB), using Sony TYPE I cassettes
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
Latin American and Oceanian
models:
530 – 1,710 kHz (with 10 kHz tuning
interval)
531 – 1,710 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: AM loop antenna, external
antenna terminal
Intermediate frequency: 450 kHz
General
Power requirements
Oceanian model: AC 230 – 240 V,
50/60 Hz
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-GT55: 225 W
HCD-GT44: 250 W
HCD-GT22: 150 W
Dimensions (w/h/d) (excl. speakers)
HCD-GT55:
Approx. 280 ×365 ×425 mm
HCD-GT44/GT22:
Approx. 280 ×325 ×425 mm
Mass (excl. speakers)
HCD-GT55: 10.5 kg
HCD-GT44/GT22: 10.0 kg
Design and specifications are subject to
change without notice.
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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3
HCD-GT22/GT44/GT55
TABLE OF CONTENTS
1. SERVICING NOTES ............................................... 4
2. GENERAL ................................................................... 6
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 7
3-2. Case (Side-L), Case (Side-R) .......................................... 8
3-3. Case (Top) ....................................................................... 8
3-4. Lid (CD) .......................................................................... 9
3-5 CD Mechanism Deck
(CDM74KF-K6BD91UR-WOD), USB board ................ 9
3-6. Front Panel Block ............................................................ 10
3-7. Mecha Deck (CWN42FF609) ......................................... 10
3-8. Back Panel Block ............................................................ 11
3-9. MAIN Board.................................................................... 11
3-10. CD Board......................................................................... 12
3-11. DRIVER Board, SW Board............................................. 12
3-12. Optical Pick-up Block (KSM-213D)............................... 13
3-13. SENSOR Board ............................................................... 13
3-14. MOTOR (TB) Board ....................................................... 14
3-15. MOTOR (LD) Board ....................................................... 14
4. TEST MODE.............................................................. 15
5. MECHANICAL ADJUSTMENTS ....................... 19
6. ELECTRICAL ADJUSTMENTS ......................... 20
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, POWERAMP Section –....... 26
7-5. Printed Wiring Board – CD Board – ............................... 28
7-6. Schematic Diagram – CD Board – .................................. 29
7-7. Printed Wiring Boards – CHANGER Section –.............. 30
7-8. Schematic Diagram – CHANGER Section – .................. 31
7-9. Printed Wiring Board – USB Board – ............................. 32
7-10. Schematic Diagram – USB Board –................................ 33
7-11. Printed Wiring Board – TC Board –................................ 34
7-12. Schematic Diagram – TC Board – .................................. 35
7-13. Printed Wiring Boards – MAIN Section – ...................... 37
7-14. Schematic Diagram – MAIN Section (1/4) – .................. 38
7-15. Schematic Diagram – MAIN Section (2/4) – .................. 39
7-16. Schematic Diagram – MAIN Section (3/4) – .................. 40
7-17. Schematic Diagram – MAIN Section (4/4) – .................. 41
7-18. Printed Wiring Board – MIC Board – ............................. 42
7-19. Schematic Diagram – MIC Board – ................................ 43
7-20. Printed Wiring Board
– AMP Board (GT22/GT55) – ........................................ 44
7-21. Schematic Diagram – AMP Board (GT22/GT55) –........ 45
7-22. Printed Wiring Board – AMP Board (GT44) – ............... 46
7-23. Schematic Diagram – AMP Board (GT44) – .................. 47
7-24. Printed Wiring Boards
– SUB WOOFER Section (GT44/GT55) – ..................... 48
7-25. Schematic Diagram
– SUB WOOFER Section (GT44/GT55) – ..................... 49
7-26. Printed Wiring Boards – PANEL Section –..................... 50
7-27. Schematic Diagram – PANEL Section – ......................... 51
7-28. Printed Wiring Boards – KEY Section – ......................... 52
7-29. Schematic Diagram – KEY Section – ............................. 53
7-30. Printed Wiring Board
– TRANS Board (GT22/GT55) –.................................... 54
7-31. Schematic Diagram
– TRANS Board (GT22/GT55) –.................................... 55
7-32. Printed Wiring Board – TRANS Board (GT44) – ........... 56
7-34. Schematic Diagram – TRANS Board (GT44) – ............. 57
8. EXPLODED VIEWS
8-1. Case Section .................................................................... 69
8-2. KEY TOP Board Section................................................. 70
8-3. TC Mecha Deck Section.................................................. 71
8-4. PANEL Board Section..................................................... 72
8-5. Front Panel Section ......................................................... 73
8-6. MAIN Board Section....................................................... 74
8-7. POWER Board, SUB WOOFER Board Section ............. 75
8-8. Chassis Section................................................................ 76
8-9. CD Mechanism Deck Section-1
(CDM74KF-K6BD91UR-WOD) .................................... 77
8-10. CD Mechanism Deck Section-2
(CDM74KF-K6BD91UR-WOD) .................................... 78
9. ELECTRICAL PARTS LIST................................ 79
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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4
HCD-GT22/GT44/GT55
MODEL IDENTIFICATION
– Model Number Label –
Model Power voltage indication
GT22: E2, E3, E51 AC: 120V/220V/230-240V -50/60Hz 150W
GT22: E13, AUS AC: 230-240V -50/60Hz 150W
GT22: MX ca-127V 60Hz 150W
GT22: AR ca 220V -50/60Hz 150W
GT44: E13, AUS AC: 230-240V -50/60Hz 250W
GT44: E2, E3, E51 AC: 120V/220V/230-240V -50/60Hz 250W
GT44: MX ca-127V 60Hz 250W
GT44: AR ca 220V -50/60Hz 250W
GT55: E2, E51 AC: 120V/220V/230-240V -50/60Hz 225W
GT55: MX ca-127V 60Hz 225W
GT55: AR ca 220V -50/60Hz 225W
•Abbreviation
AR : Argentina model
AUS:Australian model
E2 : 120V ACArea in E model
E3 : 240V ACArea in E model
E13 : 220V - 230V ACArea in E model
E51 : Chilean and Peruvian models
MX : Mexican model
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.
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 ANTITHEFT LOCK
The disc table lock function for the antitheft of an demonstration
disc in the store is equipped.
Releasing Procedure :
1. Press the I/1button to turn the power on.
2. Press the CD button to select “CD”.
3. While pressing the xbutton, press the Zbutton until
“UNLOCKED” displayed on the fluorescent indicator tube
(around 5 seconds).
Note: When “LOCKED” is displayed, the antitheft lock is not released by
turning power on/off with the I/1button.
Power Voltage
Indication
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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5
HCD-GT22/GT44/GT55
SERVICE POSITION
In checking the CD mechanism deck, prepare jig (extension cable J-2501-248-A (27 core/300 mm))/J-2501-077-A (13 core/300 mm)
Connect jig (extension cable J-2501-248-A
)
to the flexible flat cable (27 core) and
CD board (CN202).
MAIN board
CD mechanism deck
Connect jig (extension cable J-2501-077-A)
to the flexible flat cable (13 core) and
DRIVER board (CN701).
HOW TO OPEN THE TRAY WHEN POWER SWITCH TURN OFF
1
Turn the gear (loading A)
to the direction of the arrow.
2
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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6
HCD-GT22/GT44/GT55 SECTION 2
GENERAL This section is extracted from
instruction manual.
Unit
HCD-GT55
HCD-GT44/GT22
* HCD-GT44 only
Remote
1
4/1(on/standby)
Press to turn on the system.
Unit: STANDBY indicator
Lights up when the system is off.
2
Remote sensor
3
DISPLAY
Press to change the information on the
display.
Unit: ILLUMINATION
Press to change the illumination pattern
around MASTER VOLUME qg.
4
CD
Press to select the CD function.
TUNER/BAND
Press to select the TUNER function.
Press to select FM or AM reception
mode.
Unit:TAPE A/B
Press to select the TAPE function. Press
to select TAPE A or TAPE B.
Unit: AUDIO
Press to select the AUDIO function.
USB
Press to select the USB function.
Remote: FUNCTION
Press to select the function.
5
(HCD-GT55/GT44 only)
SUBWOOFER
Press to turn on and off the subwoofer.
SUBWOOFER indicator
Lights up when the subwoofer is on.
6
ZPUSH
Press to insert or eject a tape.
7
ERASE
Press to erase MP3 files and folders
from the connected optional USB device
(Digital music player or USB storage
media).
8
Unit: PRESET EQ,
GROOVE, SURROUND
Remote: EQ
Press to select the sound effect.
9
PLAY MODE/TUNING MODE
(HCD-GT55 only)
Press to select the play mode of a CD,
MP3 disc or an optional USB device
(Digital music player or USB storage
media).
Press to select the tuning mode.
EQ BAND (HCD-GT44/GT22 only)
Press to select the frequency band.
q;
PHONES jack
Connect the headphones.
qa
AUDIO INPUT L/R jacks
Connect to an audio component
(Portable audio player, etc.).
qs
(USB) port
Connect an optional USB device (Digital
music player or USB storage media).
qd
REC/ERASE indicator
Lights up when recording to the
connected optional USB device (Digital
music player or USB storage media), or
when erasing MP3 files or folders.
qf
MIC jack
Connect an optional microphone.
MIC LEVEL
Turnto adjust the microphone volume.
qg
Unit: MASTER VOLUME
Turn to adjust the volume.
Remote: VOLUME +/–
Press to adjust the volume.
qh
OPERATION DIAL
Turn to select a track, file or folder.
qj
Unit: NX (play/pause)
Remote: N(play)
X(pause)
Press to start or pause playback.
x(stop)
Press to stop playback.
./>(go back/go forward)
Press to select a track or file.
Unit: TUNING +/–
Remote: +/– (tuning)
Press to tune in the desired station.
+/– (select folder)
Press to select a folder.
m/M(rewind/fast forward)
Press to find a point in a track or file.
qk
CD-USB SYNC/REC1
Press to record from a disc onto the
connected optional USB device (Digital
music player or USB storage media).
CD-TAPE SYNC
TAPE REC PAUSE/START
Press to record onto a tape.
ql
ZOPEN/CLOSE
Press to insert and eject a disc.
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Unit: DISC 1 – 3
Press to select a disc. Press to switch to
the CD function from other function.
Unit: DISC SKIP/EX-CHANGE
Press to select a disc. Press to exchange a
disc while playing.
Remote: DISC SKIP
Press to select a disc.
wa
RETURN
Press to return to the parent folder.
Press to exit search mode.
ws
ENTER
Press to enter the settings.
wd
(HCD-GT55 only)
ENTER
Press to enter the settings.
+/– (equalizer level)
Press to adjust the equalizer level.
wf
(HCD-GT55 only)
BASS
Press to select low frequency. The
indicator lights up when the button is
pressed.
VOCAL
Press to select mid frequency. The
indicator lights up when the button is
pressed.
GUITAR
Press to select high frequency. The
indicator lights up when the button is
pressed.
FOCUS
Press to emphasize equalizer level of the
selected band.
wg
CLOCK/TIMER SELECT
CLOCK/TIMER SET
Press to set the clock and the timers.
wh
REPEAT/FM MODE
Press to listen to a disc, an USB device, a
single track or file repeatedly.
Press to select the FM reception mode
(monaural or stereo).
wj
Battery compartment lid
wk
CLEAR
Press to delete a pre-programmed track
or file.
wl
TUNER MEMORY
Press to preset the radio station.
e;
PLAY MODE/TUNING MODE
Press to select the play mode of a CD,
MP3 disc or an optional USB device
(Digital music player or USB storage
media).
Press to select the tuning mode.
ea
SLEEP
Press to set the Sleep Timer.
•Location of Controls
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
HCD-GT22/GT44/GT55
7
•This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
SET
3-2. CASE (SIDE-L), CASE (SIDE-R)
(Page 8)
3-3. CASE (TOP)
(Page 8)
3-4. LID (CD)
(Page 9)
3-9. MAIN BOARD
(Page 11)
3-14. MOTOR (TB) BOARD
(Page 14)
3-15. MOTOR (LD) BOARD
(Page 14)
3-11. DRIVER BOARD,
SW BOARD
(Page 12)
3-6. FRONT PANEL BLOCK
(Page 10)
3-7. MECHANICAL DECK
(CWM42FF609)
(Page 10)
3-5. CD MECHANISM DECK
(CDM74KF-K6BD91UR-WOD)
(Page 9)
3-10. CD BOARD
(Page 12) 3-12. OPTICAL PICK-UP BLOCK
(KSM-213D)
(Page 13)
3-13. SENSOR BOARD
(Page 13)
3-8. BACK PANEL BLOCK
(Page 11)
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
HCD-GT22/GT44/GT55
8
Note: Follow the disassembly procedure in the numerical order given.
3-2. CASE (SIDE-L), CASE (SIDE-R)
4
three screws
(case 3 TP2)
1
three screws
(case 3 TP2)
5
two screws
(BVTP3
×
10)
2
two screws
(BVTP3
×
10)
3
case (side-L)
6
case (side-R)
3-3. CASE (TOP)
1
two screws
(BVTP3
×
10)
3
2
Open the case (top).
2
Open the case (top).
2
Open the case (top).
5
case (top)
4
four claws
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3
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Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
HCD-GT22/GT44/GT55
9
3-4. LID (CD)
3-5. CD MECHANISM DECK (CDM74KF-K6BD91UR-WOD), USB BOARD
1
Turn the gear (loading A)
to the direction of the arrow.
3
four claws
2
4
lid (CD
)
7
three screws
(BVTP3
×
8)
6
screw (BVTP3
×
8)
6
screw
(BVTP3
×
8)
8
CD mechanism deck
(CDM74KF-K6BD91UR-WOD)
1
flexible flat (13 core) cable
(CN701)
2
flexible flat (27 core) cable
(CN302)
4
connector (CN901)
3
flexible flat (21 core) cable
(MAIN board: CN301/USB board: CN907)
5
connector (CN903)
9
two screws (M2.6)
0
USB board
w
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x
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3
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Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
HCD-GT22/GT44/GT55
10
3-6. FRONT PANEL BLOCK
3-7. MECHA DECK (CWN42FF609)
5
four screws
(BVTP3
×
8)
6
front panel block
1
flexible flat cable (27 core)
(CN901)
4
two connectors
(CN301, CN302)
3
flexible flat cable (13 core)
(CN061)
2
flexible flat cable (11 core)
(CN201)
1
six screws
(BVTP2.6
×
8)
2
3
mecha deck
(CWN42FF609)
w
w
w
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1
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3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
HCD-GT22/GT44/GT55
11
3-8. BACK PANEL BLOCK
3-9. MAIN BOARD
4
two screws
(BVTP3
×
10)
4
two screws
(BVTP3
×
10)
(GT44/GT55)
4
two screws
(BVTP3
×
10)
5
back panel block
2
connector
(CN041)
1
flexible flat cable (9 core)
(tuner (FM/AM))
3
connector
(CN701)
(except Australian model)
5
screw
(BVTP3
×
8)
7
screw
(BV3)
9
6
screw
(BVTP3
×
8)
8
two screws
(BVTT4
×
8)
3
connector
(CN907)
1
flexible flat cable (11 core)
(CN008)
0
connector
(CN031)
4
connector
(CN271)
qa
MAIN boar
d
qs
POWER board
2
connector
(CN903)
w
w
w
.
x
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3
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2
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4
2
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2
2
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2
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2
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1
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Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
HCD-GT22/GT44/GT55
12
3-10. CD BOARD
6
CD
board
5
Remove soldering from the four points.
4
flexible flat (16 core) cabl
e
(CN301)
CD machanism deck
(bottom side)
1
screw
(BVTP3
×
8)
2
screw
(BVTP2.6)
3
cover (OP)
3-11. DRIVER BOARD, SW BOARD
3
connector
(CN703)
4
connector
(CN704)
5
DRIVER
board
7
SW board
2
wire (flat type) (5 core)
(CN702)
1
two
screws
(BTTP (M2.6))
6
screw
(BTTP (M2.6))
CD machanism deck
(bottom side)
w
w
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Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
HCD-GT22/GT44/GT55
13
3-12. OPTICAL PICK-UP BLOCK (KSM-213D)
3-13. SENSOR BOARD
4
two
coil springs
(insulator)
7
two
coil springs
(insulator)
5
two
insulators
8
two
insulators
6
two floating
screws
(PTPWH M2.6)
2
h
older (213) assy
0
Remove the four solders of motor.
qa
flexible flat
cable
(16 core
)
(CN301)
qs
C
D board
qd
optical pick-up block
(KSM-213D)
1
floating
screw
(PTPWH M2.6)
3
two floating
screws
(PTPWH M2.6)
9
2
t
ray
3
b
elt (table)
5
p
ulley (table)
8
s
crew
(BTTP (M2.6))
0
SENSOR board
7
g
ear (geneva)
9
connector
(
CN731)
1
floating
screw
(PTPWH M2.6)
6
floating
screw
(PTPWH M2.6)
4
floating
screw
(PTPWH M2.6)
w
w
w
.
x
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3
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1
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Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
HCD-GT22/GT44/GT55
14
3-14. MOTOR (TB) BOARD
3-15. MOTOR (LD) BOARD
6
Remove the two solderings of motor.
8
MOTOR (TB) board
7
t
able motor assy (M741)
5
two
screws
(BTTP (M2.6))
4
3
wire (flat type) (5 core) (CN742)
1
stopper
2
stopper
3
Remove the two solderings of motor.
5
MOTOR (LD) board
1
b
elt (loading)
4
l
oading motor assy (M751)
2
two
screws
(BTTP (M2.6))
w
w
w
.
x
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a
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1
6
3
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2
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4
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2
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1
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Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
15
HCD-GT22/GT44/GT55
AMP TEST MODE
This mode is used to display the parameter of amplifier IC and
display the VACS status.
Procedure:
1. Press the I/1button to turn the power on.
2. Press three buttons of x, uand [USB] simultaneously.
3. When the AMP test mode is activated, the message “AMP
TEST IN” is displayed on the fluorescent indicator tube
momentarily, then amplifier adjustment mode is displayed on
the fluorescent indicator tube.
4. Press the [TAPE REC PAUSE/START] button to changed over
between VACS status display mode and the amplifier IC
parameter display mode.
5. In this mode, press the [GROOVE] button to changed over
DBFB on/off, and “DBFB ON” or “DBFB OFF” is displayed
on the fluorescent indicator tube.
6. In this mode, press the [SURROUND] button to changed over
surround on/off, and “SURROUND ON” or “SURROUND
OFF” is displayed on the fluorescent indicator tube.
−For GT22/GT44 −
7. In this mode, press the [EQ BAND] button to enter the equalizer
adjustment mode.
In the equalizer adjustment mode, press the [EQ BAND] button
to change over the adjustment band as LOW/MID/HIGH.And
turn the [OPERATION DIAL] knob to adjust the equalizer level
of each bands.
−For GT55 −
7. In this mode, press the [BASS], [VOCAL] or [GUITAR] button
to enter the parametric equalizer adjustment mode.
Intheparametric equalizeradjustment mode, pressthe [BASS],
[VOCAL] and [GUITAR] button to change over the adjustment
band. And press the [BASS], [VOCAL] or [GUITAR] button to
change over the equalizer frequency of each bands, or press
the [+] and [--] buttons to adjust the equalizer level of each
bands.
8. To releasethe amplifierIC parameterdisplay modeorequalizer
adjustment mode, press the I/1button to the power off.
MC TEST MODE
This mode is used to check operations of microprocessor.
Procedure:
1. Press the I/1button to turn the power on.
2. Press three buttons of x, uand [AUDIO] simultaneously.
3. When the MC test mode is activated,VACS level is displayed
on the fluorescent indicator tube momentarily.
4. Press the [TUNING +] button, the message “ALL EQ MAX”
is displayed on the fluorescent indicator tube momentarily
and pressthe [TUNING--]button, the message “ALL EQ MIN”
is displayed on the fluorescent indicator tube momentarily.
5. Press the [ENTER] button, the message “ALL EQ FLAT” is
displayed on the fluorescent indicator tube momentarily.
6. Turn the [VOLUME] knob clockwise, the message “VOLUME
MAX” is displayed on the fluorescent indicator tube
momentarily and turn the [VOLUME] knob counterclockwise,
the message “VOLUME MIN” is displayed on the fluorescent
indicator tube momentarily.
7. Press the [TAPE REC PAUSE/START] button to changed over
VACS on/off.
8. Press the I/1button to release from this mode, then cold reset
is performed.
SECTION 4
TEST MODE
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. Pressthreebuttonsof x,uand [GROOVE] simultaneously.
2. The message “COLD RESET” is displayed on the fluorescent
indicator tube momentarily, then becomes standby states.
TUNING STEP CHANGE-OVER
A step of AM tuning interval can be changed over between 9 kHz
and 10 kHz.
Procedure:
1. Press the I/1button to turn the power on.
2. Press the [TUNER/BAND] button to select “AM”.
3. Press the I/1button to turn the power off.
4. Press two buttons of [TUNING +] and I/1simultaneously.
5. Themessage “AM 9KSTEP”or “AM 10KSTEP” is displayed
on the fluorescent indicator tube, and thus the tuning interval
is changed over.
CD SHIP (LOCK) MODE
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 the I/1button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Press two buttons of uand I/1simultaneously.
4. Themessage“LOCK” isdisplayed on thefluorescent indicator
tube, and the CD ship mode is set.
CD SHIP (LOCK) MODE & COLD RESET
This mode is used to perform CD ship (lock) mode and cold reset
simultaneously.
Procedure:
1. Press the I/1button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Press three buttons of x, [ILLUMINATION] and I/1
simultaneously.
4. The message “COLD RESET” is displayed on the fluorescent
indicator tube momentarily, then becomes standby states.
ANTITHEFT LOCK MODE
This mode is used to unable to take sample disc out of disc table in
the shop.
Procedure:
1. Press the I/1button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Insert a disc.
4. Press two buttons of xand Zfor 5 seconds.
5. The message “LOCKED” is displayed on the fluorescent
indicator tube and the disc table is locked. (Even if pressing
the Zbutton, the message “LOCKED” is displayed on the
fluorescent indicator tube and the disc table is locked)
6. To release this mode, press two buttons of xand Zfor 5
seconds.
7. The message “UNLOCKED” is displayed on the fluorescent
indicator tube and the disc table is unlocked.
w
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.
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1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
16
HCD-GT22/GT44/GT55
VERSION DISPLAY MODE
This mode is used to check the model, destination and software
version.
Procedure:
1. Press the I/1button to turn the power on.
2. Press three buttons of x, u and [ILLUMINATION] simulta-
neously.
3. When this mode is activated, model type and destination (*1)
are displayed on the fluorescent indicator tube.
*1) GRL2H : HCD-GT22
GRL2HS : HCD-GT44
GRL3HS : HCD-GT55
Example: GRL3HS_LATIN: Latin American models of HCD-GT55
4. Press the[TAPE REC PAUSE/START] buttonto display thesoft-
ware version (*2) and year, month, day of the software cre-
ation.
*2) G**.*** : The version of system controller (IC901 on the MAIN
board).
M**.*** : The version of USB control module in the sysytem
controller.
U**.*** : The version of USB controller (IC901 on the USB
board).
5. To release this mode, press three buttons of x, uand
[ILLUMINATIOM] simultaneously.
CD ERROR CODE DISPLAY MODE
This mode can be used for error code display of CD section.
Procedure:
1. Press the I/1button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Press three buttons of x, [CD] and [SURROUND] simulta-
neously.
4. When this mode is activated, mechanism deck error code is
displayed on the fluorescent indicator tube.
5. Press the [ENTER] button to changed over between optical
pick-up error code display mode and mechanism deck error
code mode.
Note: There are two [ENTER] buttons on the HCD-GT55, but it works in
the same way whichever button is pressed.
6. Press the [TUNING +]/[TUNING ---] button to change over dis-
play of error history number.
7. To release this mode, press the I/1button to turn the power
off.
1. Mechanism Deck Error Code Mode
When this mode is entered, mechanism deck error code is displayed
with the 10-character format on the fluorescent indicator tube.
The first digit from the left indicates:
The first digit from the left indicates which mode the error history
is. In the mechanism deck error code mode, “M” is displayed on
the fluorescent indicator tube.
The second digit from the left indicates:
(Error history number display)
The second digit from the left indicates which order the error history
is. “0” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error.
The third and 4th digit from the left indicates:
(Error status display)
The third and 4th digit from the left indicates which error status is
indicated.
Display Status
00 No error
08 Table operation time-out (Table does not move to the target
position within the specified time)
16 In the chucking down operation, the operation was retried
by the maximum number of times but the operation could
not be completed
17 In the chucking up and down operation, the reverse
recovery processing was attempted but it could not be
recovered
18 In the chucking up operation, the operation was retried by
the maximum number of times but the operation could not
be completed
20 Loading operation time-out (Table does not move to the
target position within the specified time)
22 As the chuck was in the ex-open status at the initialization,
the closing was attempted but could not be completed
The 5th and 6th digit from the left indicates:
(Present status display)
The 5th and 6th digit from the left indicates which operating status
when an error occurred is indicated.
Display Status
01 Open completion status
02 From open status, the movement to chucking down position
is under way
03 From chucking down position, the open operation is under
way
04 Chucking down completion status
10 The chucking down operation is under way
11 The chucking up operation is under way
12 Close completion status
13 From close status, the ex-open operation is under way
14 From ex-open status, the close operation is under way
18 Ex-pen completion status
The 7th and 8th digit from the left indicates:
(Motor status display)
The 7th and 8th digit from the left indicates which motor output
status when an error occurred is indicated.
Display Status
×0No table motor output
×1Table motor forward output
×2Table motor backward output
×3Table motor break output
0×No loading motor output
1×Loading motor forward output
2×Loading motor backward output
3×Loading motor break output
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1
5
1
3
6
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Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
17
HCD-GT22/GT44/GT55
5 REPEAT LIMIT CANCEL MODE
Number of repeat for CD playback is 5 times when the repeat mode
is “REPEAT”. This mode is used to enables CD to repeat playback
for limitless times.
Procedure:
1. Press the I/1button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Press three buttons of x, [CD] and usimultaneously.
4. The message “LIMIT OFF” is displayed on the fluorescent
indicator tube momentarily, CD repeat 5 limit is cancelled.
CD/USB POWER MANAGE
This mode is used to changed over CD and USB power on/off for
decreasing of reception noise in the tuner mode.
Procedure:
1. Press the I/1button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Press the I/1button to turn the power off.
4. Press two buttons of xand I/1simultaneously.
5. The message “CD POWER ON” or “CD POWER OFF” is
displayed on the fluorescent indicator tube, and CD and USB
power on/off changed over in the tuner mode.
BOOSTER ON/OFF
This mode is used to changed over MP3 booster on/off.
Procedure:
1. Press the I/1button to turn the power on.
2. Press the [USB] button to select “USB”.
3. Press three buttons of x, [SURROUND] and [USB] simulta-
neously.
4. The message “BOOSTER ON” or “BOOSTER OFF” is
displayed on the fluorescent indicator tube, and MP3 booster
on/off changed over.
EXCITER ON/OFF
This mode is used to changed over the exciter on/off.
Procedure:
1. Press the I/1button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Insert a MP3 disc.
4. Press three buttons of x,[SURROUND] and [AUDIO] simul-
taneously.
5. The message “EXCITER ON” or “EXCITER OFF” is
displayed on the fluorescent indicator tube, and the exciter
on/off changed over.
CD SERVICE MODE
This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the optical pick-up.
Procedure:
1. Press the I/1button to turn the power on.
2. Press the [CD] button to select “CD”.
3. Press three buttons of x,[FOLDER ---] and [SURROUND]
simultaneously, the message “SERVICE” is displayed on the
fluorescent indicator tube.
4. Press the [TUNING ---] button to move the optical pick-up to
inside track and the message “SLED IN” is displayed on the
fluorescent indicator tude, or press the [TUNING +] button to
outside track and the message “SLED OUT” is displayed on
the fluorescent indicator tude.
5. Press the [DISPLAY] button, “LD ON” or “LD OFF” is dis-
played on the fluorescentindicatortude. Each time [DISPLAY]
button is pressed, laser diode on/off is changed over.
6. To release this mode, press three buttons of x, [FOLDER ---]
and [SURROUND].
The 9th and 10 th digit from the left indicates:
(Tray status display)
The9thand 10thdigit fromthe leftindicates whichtargetprocessing
when an error occurred is indicated.
Display Status
01 Open operation
12 Close operation
18 Ex-open operation
2. Optical Pick-up Error Code Mode
When this mode is entered, optical pick-up error code is displayed
with the 8-character format on the fluorescent indicator tube.
The first digit from the left indicates:
The first digit from the left indicates which mode the error history
is. In the optical pick-up error code mode, “D” is displayed on the
fluorescent indicator tube.
The second digit from the left indicates:
(Error history No. display)
The second digit from the left indicates which order the error history
is. “0” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error.
The third and 4th digit from the left indicates:
(Error status display)
The third and 4th digit from the left indicates which error status is
indicated.
Display Status
01 Not focused (TOC read without a disc)
02 GFS NG (TOC read with a disc chucked)
03 Start operation time-over
04 Defocused continuously (Defocused during TOC reading)
05 Q code not entered for specified time
06 Tracking not turned ON
07 Blank disc (Blank disc TOC read)
The 5th and 6th digit from the left indicates:
(Error step display)
The 5th and 6th digit from the left indicates which processing when
a trouble occurred
Display Contents
01 Power OFF in progress
02 Initialize in progress
03 Oscillation stopping
04 From oscillation stop, oscillation starting
05 Stopping
06 Stop operation is under way
07 Start operation in progress
08 TOC read in progress
09 Search operation is under way
0A Playback operation is under way
0B Pause operation is under way
0C Playback manual search operation is under way
0D Pause manual search operation is under way
0E —
The 7th and 8th digit from the left indicates:
The 7th and 8th digit from the left indicates which operation in
progress when a trouble occurred. (Step of each processing of the
5th and 6th digits is indicated)
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Q
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
18
HCD-GT22/GT44/GT55
PANEL TEST MODE
This mode is used to check the fluorescent indicator tube, LEDs, phones jack, keys and control knobs.
Procedure:
1. Press the I/1button to turn the power on.
2. Press three buttons of x, [SURROUND] and [TUNER] simultaneously.
3. All segments on the fluorescent indicator tube and all LEDs light up.
4. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the key routes check mode.
5. In this mode, each time any button is pressed, it displays key route and key number of the button. (Refer to following table)
Example: [DISPLAY] button : “KEY 10000”
[TUNER/BAND] button : “KEY 40000”
[ILLUMINATION] button : “KEY 01000”
[CD-TAPE SYNC] button : “KEY 00070”
6. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the key check mode.
7. In this mode, each time any button is pressed, “KEYCONT” value increases. However, once a button is pressed, it is no longer
taken into account. (Maximum numbers are GT22: 29, GT44: 30, GT55: 39)
8. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the phones jack check mode.
9. In this mode, “H_P ON” is displayed when phones jack is inserted, and “H_P OFF” is displayed when phones jack is pulled out.
10. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the volume check mode and display “VOLUME
FLAT”.
11. In this mode, “VOLUME UP” is displayed when [VOLUME] knob is turned clockwise, and “VOLUME DOWN” is displayed
when [VOLUME] knob is turned counterclockwise.
12. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the jog check mode and display “JOG FLAT”.
13. In this mode, “JOG UP” is displayed when [OPERATION DIAL] knob is turned clockwise, and “JOG DOWN” is displayed when
[OPERATION DIAL] knob is turned counterclockwise.
14. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to release the Panel Test mode.
KeyKey Routes
No. KEY0 KEY1 KEY2 KEY3 KEY4 (GT55 only)
1DISPLAY ILLUMINATION ENTER DISC 1 +
2POWER ERASE RETURN DISC 2 ENTER(PEQ)
3CD PRESET EQ FOLDER + DISC 3 –
4TUNER/BAND GROOVE TUNING + EX-CHANGE/ GUITAR
DISC SKIP
5TAPE A/B SURROUND PLAY/PAUSE STOP FOCUS (GUITAR)
6AUDIO EQ BAND (GT22/GT44) TUNING – CD-USB SYNC/REC1 FOCUS (VOCAL)
PLAY MODE (GT55)
7USB FOLDER – CD-TAPE SYNC VOCAL
8SUBWOOFER OPEN/CLOSE TAPE REC BASS
(GT44/GT55) PAUSE/START
9FOCUS (BASS)
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3
Q
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
19
HCD-GT22/GT44/GT55
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
demagnetizer. (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
2.6 – 6.9 mN⋅m
FWD CQ-102C (30 – 70 g⋅cm)
(0.41 – 0.97 oz⋅inch)
FWD 0.15 – 0.59 mN⋅m
Back Tension CQ-102C (1.5 – 6.0 g⋅cm)
(0.021 – 0.083 oz⋅inch)
5.4 – 16.7 mN⋅m
FF/REW CQ-201B 55 – 170 g⋅cm)
0.76 – 2.35 oz⋅inch)
TAPE TENSION MEASUREMENT
Mode Tension Meter Meter Reading
FWD CQ-403A more than 100 g
(more than 3.53 oz)
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Q
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
20
HCD-GT22/GT44/GT55
3. Mode: Playback
set
test tape
P-4-A063
(6.3 kHz, –10 dB) oscilloscope
VH
waveform of oscilloscope
0
°
+45
°
–45
°
+90
°
+135
°
+180
°
good wrong
MIC board
PHONES jack
(J803)
2. Turn the adjustmentscrewand check outputpeaks. If thepeaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
Screw
position
L-CH
peak
within
1dB
Output
level
L-CH
peak R-CH
peak
within
1dB
Screw
position
R-CH
peak
SECTION 6
ELECTRICAL ADJUSTMENTS
0 dB=0.775 VDECK SECTION
set
MIC board
PHONES jack
(J803)
+
–
level mete
r
test tape
P-4-A063
(6.3 kHz, –10 dB)
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.
TEST TAPE
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
Note: Perform this adjustment for both decks.
Procedure:
1. Mode: Playback
Tape Signal Used for
P-4-A063 6.3 kHz, -10 dB Azimuth Adjustment
4. After the adjustments, apply suitable locking compound to
the pats adjusted.
Adjustment Location: Playback Head (DECK-A)
Record/Playback/Erase Head (DECK-B)
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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