DOWNLOAD Sony HCD-GT22 / HCD-GT44 / HCD-GT55 / MHC-GT22 / MHC-GT22BP / MHC-GT44 / MHC-GT44BP / MHC-GT55 / MHC-GT55BP Service Manual ↓ Size: 5.41 MB | Pages: 98 in PDF or view online for FREE

5

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).

As for except Mexican model, CD mechanism deck has been changed from CDM74KF-K6BD91UR-WOD to CDM74KFV-K6BD91UR-
WOD on the way of production.
Please repair after confirming which type repaired CD mechanism deck is without fail according to how to distinguish the figure below when
you repairing exchange each part of CD mechanism deck.

CD mechanism deck

– lifter (KSM) –

for CDM74KF-K6BD91UR-WOD

DISCRIMINATION

for CDM74KFV-K6BD91UR-WOD

– lever (lifter) –

6

This section is extracted from
instruction manual.

* HCD-GT44 only

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

Z

 PUSH

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

Turn to 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

Z

 OPEN/CLOSE

Press to insert and eject a disc.

w;

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

7

•

This set can be disassembled in the order shown below.

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, USB BOARD

(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)

8

 Follow the disassembly procedure in the numerical order given.

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)

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