CDX-GT572 — Sony Car Audio Service Manual (repair manual)

Model
CDX-GT572
Pages
38
Size
5.55 MB
Type
PDF
Document
Service Manual
Brand
Device
Car Audio
File
cdx-gt572.pdf
Date

View Sony CDX-GT572 Service Manual online

SERVICE MANUAL
Published by Sony Techno Create Corporation
Sony Corporation
Audio Business Group
SPECIFICATIONS
9-889-086-01
2008D04-1
© 
2008.04
E Model
Ver. 1.0  2008.04
Model Name Using Similar Mechanism
CDX-GT527EE/
GT570/GT570S
CD Drive Mechanism Type
MG-101TC-188//Q
Optical Pick-up Name
DAX-25A
•  The tuner and CD sections have no adjustments.
CDX-GT572
FM/MW/SW COMPACT DISC PLAYER
CD Player section
Signal-to-noise ratio: 120 dB
Frequency response: 10 – 20,000 Hz
Wow and fl utter: Below measurable limit
Tuner section
FM
Tuning range:
  87.5 – 108.0 MHz (at 50 kHz step)
  87.5 – 107.9 MHz (at 200 kHz step)
FM tuning interval:  
  50 kHz/200 kHz switchable
Antenna (aerial) terminal:
  External antenna (aerial) connector
Intermediate frequency: 10.7 MHz/450 kHz
Usable sensitivity: 9 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 
  67 dB (stereo), 69 dB (mono)
Harmonic distortion at 1 kHz: 
  0.5 % (stereo), 0.3 % (mono)
Separation: 35 dB at 1 kHz
Frequency response: 30 – 15,000 Hz
MW
Tuning range:
 
  531 – 1,602 kHz (at 9 kHz step)
  530 – 1,710 kHz (at 10 kHz step)
MW tuning interval: 
 
9 kHz/10 kHz switchable
Antenna (aerial) terminal:
  External antenna (aerial) connector
Intermediate frequency: 10.7 MHz/450 kHz
Sensitivity: 30 
μV
SW
Tuning range:
 
  SW1: 2,940 – 7,735 kHz 
  SW2: 9,500 – 18,135 kHz 
  (except for 10,140
 – 11,500 kHz)
Antenna (aerial) terminal:
  External antenna (aerial) connector
Intermediate frequency: 10.7 MHz/450 kHz
Sensitivity: 30 
μV
Power amplifi er section
Outputs: Speaker outputs (sure seal connectors)
Speaker impedance: 4 – 8 ohms
Maximum power output: 52 W × 4 (at 4 ohms)
General
Output:
  Audio outputs terminal (front/rear) 
  Subwoofer output terminal (mono) 
  Power antenna (aerial) relay control terminal
 Power 
amplifi er control terminal
Inputs:
  BUS control input terminal
  BUS audio input terminal
  Remote controller input terminal
  Antenna (aerial) input terminal
  AUX input jack (stereo mini jack)
Tone controls:
  Low: ±10 dB at 60 Hz (XPLOD)
  Mid: ±10 dB at 1 kHz (XPLOD)
  High: ±10 dB at 10 kHz (XPLOD)
Power requirements: 12 V DC car battery
  (negative ground (earth))
Dimensions: Approx. 178 × 50 × 180 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:
  Card remote commander: RM-X151
  Parts for installation and connections (1 set)
Design and specifi cations are subject to change
without notice.
CDX-GT572
2
• CD playback
You can play CD-DA (also containing CD TEXT), CD-R/CD-
RW (MP3/WMA fi les).
Type of discs
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 
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 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.
• 
Usable with ordinary solder
 
It is best to use only unleaded solder but unleaded solder may 
also be added to ordinary solder.
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.
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 fl exible 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 refl ective 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.
This compact disc player is classifi ed as a CLASS 1 LASER 
 
 
 
 
 
product. The CLASS 1 LASER PRODUCT label is located on the 
exterior.
This label is located on the bottom of the chassis.
CAUTION
Use of controls or adjustments or performance of procedures other than 
those specifi ed herein may result in hazardous radiation exposure.
If the optical pick-up block is defective, please replace the whole 
optical pick-up block.
Never turn the semi-fi xed resistor located at the side of optical 
pick-up block.
TEST  DISCS
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)
SAFETY-RELATED COMPONET WARNING!
COMPONENTS  IDENTIFIED  BY  MARK 
0 OR  DOTTED  LINE  
WITH  MARK 
0 ON  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.
optical pick-up
semi-fixed resistor
CDX-GT572
3
1. 
SERVICE  NOTE
  .....................................................   4
2. GENERAL
 
Location of Controls .......................................................   5
 Connections 
....................................................................  
5
3. DISASSEMBLY
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
4. 
DIAGNOSIS  FUNCTION 
 .....................................   14
TABLE  OF  CONTENTS
5. DIAGRAMS
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 (1/3)– ......................   20
5-5.  Schematic Diagram –Main Section (2/3)– ......................   21
5-6.  Schematic Diagram –Main Section (3/3)– ......................   22
5-7.  Printed Wiring Boards –Sub Section– ............................   23
5-8.  Schematic Diagram –Sub Section– .................................   23
5-9.  Printed Wiring Boards –Key Section– ............................   24
5-10.  Schematic Diagram –Key Section– ................................   25
6. 
EXPLODED  VIEWS
6-1. Main 
Section 
...................................................................  29
6-2.  Front Panel Section .........................................................   30
6-3.  CD Mechanism Section (MG-101TC-188//Q) ...............   31
7. 
ELECTRICAL  PARTS  LIST
  ..............................   32
CDX-GT572
4
NOTE  FOR  REPLACEMENT  OF  THE  SERVO  BOARD
When repairing, the complete SERVO board (A-1177-201-A) 
should be replaced since any parts in the SERVO board cannot be 
repaired.
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.
SECTION  1
SERVICE  NOTE
EXTENSION  CABLE  AND  SERVICE  POSITION
When repairing or servicing this set, connect the jig (extension 
cable) as shown below.
•  Connect the MAIN board (CN350) and the SERVO board 
(CN2) with the extension cable (Part No. J-2502-076-1).
KEY board
front panel
AUX jack
SERVO BOARD
CN2
MAIN BOARD
CN350
J-2502-076-1
Page of 38
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Here you can view online or download Sony CDX-GT572 Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony CDX-GT572 Car Audio. Information contained in Sony CDX-GT572 service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).