Sony CDX-GT24 / CDX-GT28 Service Manual ▷ View online
CDX-GT24/GT28
3
Type of disc
Label on the disc
CD-DA
MP3
WMA
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
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
• 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.
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
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 fl ow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
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.
also be added to ordinary solder.
• CD Play back
You can play CD-DA (also containing CD TEXT) and CD-
R/CD-RW (MP3/WMA fi les).
R/CD-RW (MP3/WMA fi les).
CDX-GT24/GT28
4
1.
SERVICING NOTES
.............................................. 5
2. GENERAL
Location of Controls ....................................................... 6
Connections
....................................................................
7
3. DISASSEMBLY
3-1. Sub Panel Assy ............................................................... 9
3-2. CD Mechanism Block ..................................................... 9
3-3. Main Board ..................................................................... 10
3-4. Servo
3-2. CD Mechanism Block ..................................................... 9
3-3. Main Board ..................................................................... 10
3-4. Servo
Board
.................................................................... 10
3-5. Chassis (T) Sub Assy ...................................................... 11
3-6. Roller Arm Assy .............................................................. 11
3-7. Chassis
3-6. Roller Arm Assy .............................................................. 11
3-7. Chassis
(OP)
Assy
........................................................... 12
3-8. Chucking Arm Sub Assy ................................................. 12
3-9. Sled
3-9. Sled
Motor
Assy
.............................................................. 13
3-10. Optical Pick-up Section .................................................. 14
3-11. Optical Pick-up ............................................................... 14
3-11. Optical Pick-up ............................................................... 14
TABLE OF CONTENTS
4. DIAGRAMS
4-1. Block Diagram –Main Section– ..................................... 15
4-2. Block Diagram –Display Section– ................................. 16
4-3. Printed Wiring Board –Main Section– ............................ 17
4-4. Schematic Diagram –Main Section (1/3)– ...................... 18
4-5. Schematic Diagram –Main Section (2/3)– ...................... 19
4-6. Schematic Diagram –Main Section (3/3)– ...................... 20
4-7. Printed Wiring Boards –Key Section– ............................ 21
4-8. Schematic Diagram –Key Section– ................................ 22
4-2. Block Diagram –Display Section– ................................. 16
4-3. Printed Wiring Board –Main Section– ............................ 17
4-4. Schematic Diagram –Main Section (1/3)– ...................... 18
4-5. Schematic Diagram –Main Section (2/3)– ...................... 19
4-6. Schematic Diagram –Main Section (3/3)– ...................... 20
4-7. Printed Wiring Boards –Key Section– ............................ 21
4-8. Schematic Diagram –Key Section– ................................ 22
5. EXPLODED
VIEWS
5-1. Main
Section
................................................................... 28
5-2. Front Panel Section ......................................................... 29
5-3. CD Mechanism Section (MG-101L-188//Q) .................. 30
5-3. CD Mechanism Section (MG-101L-188//Q) .................. 30
6.
ELECTRICAL PARTS LIST .............................. 31
CDX-GT24/GT28
5
SECTION 1
SERVICE NOTE
EXTENSION CABLE AND SERVICE POSITION
When repairing or servicing this set, connect the jig (extension
cable) as shown below.
When repairing or servicing this set, connect the jig (extension
cable) as shown below.
• Connect the MAIN board (CNP301) and the SERVO board
(CN401) with the extension cable (Part No. J-2502-076-1).
NOTE FOR REPLACEMENT OF THE AUX JACK (J901)
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.
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.
NOTE FOR REPLACEMENT OF THE SERVO BOARD
When repairing, the complete SERVO board (Part No. A-1552-
122-A) should be replaced since any parts in the SERVO board
cannot be repaired.
When repairing, the complete SERVO board (Part No. A-1552-
122-A) should be replaced since any parts in the SERVO board
cannot be repaired.
NOTE FOR THE 15-PIN CONNECTOR (CN901)
Do not use alcohol to clean the 15-pin connector (CN901) connect-
ing the front panel with the main body.
Do not touch the connector directly with your bare hand. Poor con-
tact may be caused.
Do not use alcohol to clean the 15-pin connector (CN901) connect-
ing the front panel with the main body.
Do not touch the connector directly with your bare hand. Poor con-
tact may be caused.
SERVO BOARD
CN401
CN401
MAIN BOARD
CNP301
CNP301
J-2502-076-1
KEY board
AUX jack
front panel
CDX-GT24/GT28
6
SECTION 2
GENERAL
This section is extracted
from instruction manual.
from instruction manual.
• LOCATION OF CONTROLS
6
Location of controls and basic operations
Main unit
This section contains instructions on the location
of controls and basic operations.
For details, see the respective pages.
of controls and basic operations.
For details, see the respective pages.
" OFF button
To power off; stop the source.
# EQ3 (equalizer) button page 10
To select an equalizer type (XPLOD,
VOCAL, EDGE, CRUISE, SPACE,
GRAVITY, CUSTOM or OFF).
VOCAL, EDGE, CRUISE, SPACE,
GRAVITY, CUSTOM or OFF).
$ Control dial/select button page 10
To adjust volume (rotate); select setup items
(press and rotate).
(press and rotate).
% SOURCE button
To power on; change the source (Radio/CD/
AUX).
AUX).
& Disc slot
Insert the disc (label side up), playback
starts.
starts.
' Display window
( AUX input jack page 11
To connect a portable audio device.
) ;(eject) button
To eject the disc.
SEEK
SEEK
PAUSE
REP
SHUF
EQ3
DSPL
OFF
AF/TA
PTY
PUSH SELECT
6
1
5
3
2
4
MODE
SOURCE
SCRL
ALBUM
RB RT
R
RE
RG
7
*
(front panel release) button page 4
+ DSPL (display)/SCRL (scroll) button
page 8
To change display items (press); scroll the
display item (press and hold).
To change display items (press); scroll the
display item (press and hold).
, SEEK –/+ buttons
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).
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).
- MODE button page 8
To select the radio band (FM/MW/LW).
. AF (Alternative Frequencies)/
TA (Traffic Announcement)/
PTY (Program Type) button page 10
To set AF and TA (press); select PTY (press
and hold) in RDS.
PTY (Program Type) button page 10
To set AF and TA (press); select PTY (press
and hold) in RDS.
/ Number buttons
CD:
/ : ALBUM –/+ (during MP3/WMA
playback)
/ : ALBUM –/+ (during MP3/WMA
playback)
To skip albums (press); skip albums
continuously (press and hold).
continuously (press and hold).
: REP page 8
: SHUF page 8
: PAUSE
: SHUF page 8
: PAUSE
To pause playback. To cancel, press
again.
again.
Radio:
To receive stored stations (press); store
stations (press and hold).
To receive stored stations (press); store
stations (press and hold).