DOWNLOAD Sony CDX-GT120 / CDX-GT220 / CDX-GT22W Service Manual ↓ Size: 3.59 MB | Pages: 38 in PDF or view online for FREE

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The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown 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.

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.

If the optical pick-up block is defective, please replace the whole
optical pick-up block.
Never turn the semi-fixed resistor located at the side of optical pick-
up block.

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.

Power requirements

12 V DC car battery (negative ground)

Dimensions

Approx. 178 

×

 50 

×

 179 mm

(7

 1/8

 

×

 2 

×

 7

 1/8

 in.) (w/h/d)

Mounting dimensions

Approx. 182 

×

 53 

×

 162 mm

(7

 1/4

 

×

 2

 1/8

 

×

 6

 1/2

 in.) (w/h/d)

Mass

Approx. 1.2 kg (2 lb. 11 oz.)

Supplied accessories

Parts for installation and connections (1 set)

optical pick-up

semi-fixed resistor

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•

Never reuse a disconnected chip component.

•

Notice that the minus side of a tantalum capacitor may be damaged
by heat.

Please use the following test discs for the check on the CD section.

YDES-18 (Part No. 3-702-101-01)
PATD-012 (Part No. 4-225-203-01)

3

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.)

Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40°C higher than

ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350°C.
Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscous (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

You can play CD-DA (also containing CD TEXT) and CD-R/
CD-RW (MP3/WMA files).

Type of discs

Label on the disc

CD-DA

MP3

*

WMA

*

* CDX-GT22W/GT220 only

........................................................

4

Location of Controls ........................................................

5

Connections .....................................................................

5

3-1.

Sub Panel Assy ................................................................

8

3-2.

CD Mechanism Block .....................................................

8

3-3.

Main Board ......................................................................

9

3-4.

Servo Board .....................................................................

9

3-5.

Chassis (T) Sub Assy ....................................................... 10

3-6.

Roller Arm Assy .............................................................. 10

3-7.

Chassis (OP) Assy ........................................................... 11

3-8.

Chucking Arm Sub Assy ................................................. 11

3-9.

Sled Motor Assy .............................................................. 12

3-10. Optical Pick-up Section ................................................... 13
3-11. Optical Pick-up ................................................................ 13

........................................ 14

5-1.

Block Diagram –Main Section– ...................................... 17

5-2.

Block Diagram –Display Section– .................................. 18

5-3.

Printed Wiring Board –Main Section– ............................ 19

5-4.

Schematic Diagram –Main Section (1/4)– ...................... 20

5-5.

Schematic Diagram –Main Section (2/4)– ...................... 21

5-6.

Schematic Diagram –Main Section (3/4)– ...................... 22

5-7.

Schematic Diagram –Main Section (4/4)– ...................... 23

5-8.

Printed Wiring Board –Key Section– .............................. 24

5-9.

Schematic Diagram –Key Section– ................................. 25

6-1.

Main Section .................................................................... 29

6-2.

Front Panel Section ......................................................... 30

6-3.

CD Mechanism Section (MG-101TC-188//C) ................ 31

.................................. 32

4

SERVO BOARD
CN2

MAIN BOARD
CNP301

J-2502-076-1

When repairing or servicing this set, connect the jig (extension cable)
as shown below.

• Connect the MAIN board (CNP301) and the SERVO board (CN2)

with the extension cable (Part No. J-2502-076-1).

When repairing, the complete SERVO board (A-1201-631-A) should
be replaced since any parts in the SERVO board cannot be repaired.

To replace the AUX jack requires alignment.
1. Insert the AUX jack into the KEY board.
2. Place the KEY board on the front panel.
3. Solder the three terminals of the jack.

KEY board

front panel

AUX jack

5

This section is extracted
from instruction manual.

2

•

Be sure to connect the ground (earth) lead before connecting 
the amplifi er.

•

The alarm will only sound if the built-in amplifi er is used.

2

•

When connecting only a single CD/MD changer or other 
optional device, connect directly to this unit.

•

For connecting two or more CD/MD changers or other 
optional devices, the source selector XA-C40 (not supplied) is 
necessary.

2

•

Raccordez d’abord le câble de mise à la masse avant de 
raccorder l’amplifi cateur.

•

L’alarme est émise uniquement lorsque l’amplifi cateur intégré 
est utilisé.

2

•

En cas de raccordement d’un seul changeur de CD/MD 
uniquement ou d’autres appareils en option, raccordez-le/les 
directement à cet appareil.

•

Le sélecteur de source XA-C40 (non fourni) est nécessaire 
pour raccorder deux changeurs de CD/MD ou plus ou d’autres 
appareils en option.

*

*

*

 not supplied

  non fourni

*

 AUDIO OUT SUB/REAR

*

 AUDIO OUT SUB/REAR

J

DSPL (display)/SCRL (scroll) button 
(CDX-GT320/GT32W/GT220/GT22W)  
page 8

To change display items (press); scroll the 
display item (press and hold). 

  

page 8

To change display items.

K

CD:
To skip tracks (press); skip tracks 
continuously (press, then press again within 
about 1 second and hold); reverse/fast-
forward a track (press and hold).
Radio:
To tune in stations automatically (press); find 
a station manually (press and hold).

L

MODE button  page 8

To select the radio band (FM/AM)*.

M

BTM/CAT button (CDX-GT320/GT32W)  
page 8

To start the BTM function (press and hold).

  

page 8

To start the BTM function (press and hold).

N

 (located behind the front 

panel)

page 5

O

CD:
(1)

(2): 

(during MP3/WMA 

playback)

To skip albums (press); skip albums 
continuously (press and hold).

(3): 

REP  page 8

(4): 

SHUF  page 8

(6): 

To pause playback of a CD on this unit. 
To cancel, press again.

Radio:
To receive stored stations (press); store 
stations (press and hold).

P

The following buttons on the card remote 
commander have also different buttons/functions 
from the unit. Remove the insulation film before 
use (page 5) (CDX-GT320/GT32W only).

qj <

.

,

>

To control CD/radio, the same as (SEEK) 
–/+ on the unit.
Setup, sound setting, etc., can be operated by 
< ,.

qk

To change display items.

ql

To adjust volume.

w;

To attenuate the sound. To cancel, press 
again.

wa

The same as the select button on the unit.

ws M

m

To control CD, the same as (1)/(2) (ALBM 
–/+) on the unit.
Setup, sound setting, etc., can be operated by 
M m.

wd

To scroll the display item.

wf

To receive stored stations (press); store 
stations (press and hold).

*

In the case of a CD/MD changer or SAT tuner being 
connected; when 

(SOURCE)

 is pressed, the 

connected device (“MD,” “XM” or “SR”) will appear in 
the display, depending on which device is 
connected. Furthermore, if 

(MODE)

 is pressed, you 

can switch the changer, or SAT tuner band (CDX-
GT320/GT32W only).

Note
If the unit is turned off and the display disappears, it 
cannot be operated with the card remote commander 
unless 

(SOURCE)

 on the unit is pressed, or a disc is 

inserted to activate the unit first.

This section contains instructions on the location 
of controls and basic operations.
For details, see the respective pages.
For optional device (CD/MD changer, etc.) 
operation, see “Using optional equipment” on 
page 10. The corresponding buttons on the card 
remote commander control the same functions as 
those on the unit.

A

To power off; stop the source.

B

EQ3 (equalizer) button  page 9

To select an equalizer type (XPLOD, 
VOCAL, EDGE, CRUISE, SPACE, 
GRAVITY, CUSTOM or OFF).

C

Volume control dial/select button  
page 9

To adjust volume (rotate); select setup items 
(press and rotate).

D

To power on; change the source* (Radio/CD/
AUX).

E

Insert the disc (label side up), playback 
starts.

F

G

AUX input jack  page 10

To connect a portable audio device.

H Z 

To eject the disc.

I

 (front panel release) button  page 5

1

qa qs

q;

9

2

qd

qh

qg

4

5

8

6

7

3

qf