CDX-GT475ER, CDX-GT475UR, CDX-GT525UR - Sony Car Audio Service Manual (repair manual)

cdx-gt475er, cdx-gt475ur, cdx-gt525ur service manual
Model
CDX-GT475ER CDX-GT475UR CDX-GT525UR
Pages
51
Size
3.13 MB
Type
PDF
Document
Service Manual
Brand
Device
Car Audio
File
cdx-gt475er-cdx-gt475ur-cdx-gt525ur.pdf
Date

Read Sony CDX-GT475ER / CDX-GT475UR / CDX-GT525UR Service Manual online

SERVICE MANUAL
Sony Corporation
Published by Sony Techno Create Corporation
(CDX-GT475ER/GT475UR)
(CDX-GT525UR)
Tuner section
FM
Tuning range: 
FM1/FM2: 87.5 – 108.0 MHz (at 50 kHz step)
FM3: 65 – 74 MHz (at 30 kHz step)
Tuning range: 87.5 – 108.0 MHz
CDX-GT475ER
CDX-GT475UR
Antenna (aerial) terminal: 
External antenna (aerial) connector
Intermediate frequency: 25 kHz
Usable sensitivity: 8 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 80 dB (stereo)
Separation: 50 dB at 1 kHz
Frequency response: 20 – 15,000 Hz
MW/LW
Tuning range: 
MW: 531 – 1,602 kHz
LW: 153 – 279 kHz
Antenna (aerial) terminal: 
External antenna (aerial) connector
Intermediate frequency: 
9,124.5 kHz or 9,115.5 kHz/4.5 kHz
Sensitivity: MW: 26 μV, LW: 45 μV
Tuner section
FM
Tuning range:
87.5 – 108.0 MHz (at 50 kHz step)
87.5 – 108.0 MHz (at 100 kHz step)
87.5 – 107.9 MHz (at 200 kHz step)
FM tuning step: 
50 kHz/100 kHz/200 kHz switchable
Antenna (aerial) terminal: 
External antenna (aerial) connector
Intermediate frequency: 25 kHz
Usable sensitivity: 8 dBf
Selectivity: 75 dB at 400 kHz
Signal-to-noise ratio: 80 dB (stereo)
Separation: 50 dB at 1 kHz
Frequency response: 20 – 15,000 Hz
AM
Tuning range: 
531 – 1,602 kHz (at 9 kHz step)
530 – 1,710 kHz (at 10 kHz step)
AM tuning step: 
9 kHz/10 kHz switchable
Antenna (aerial) terminal: 
External antenna (aerial) connector
Intermediate frequency: 
9,124.5 kHz or 9,115.5 kHz/4.5 kHz 
(at 9 kHz step)
9,115 kHz or 9,125 kHz/5 kHz 
(at 10 kHz step)
Sensitivity: 26 μV
CD Player section
Signal-to-noise ratio: 120 dB
Frequency response: 10 – 20,000 Hz
Wow and flutter: Below measurable limit
USB Player section
Interface: USB (Full-speed)
Maximum current: 1 A
Power amplifier section
Output: Speaker outputs
Speaker impedance: 4 – 8 ohms
Maximum power output: 52 W u 4 (at 4 ohms)
General
Outputs: 
Audio outputs terminal (rear/sub switchable)
Power antenna (aerial)/Power amplifier control 
terminal (REM OUT)
Inputs: 
Remote controller input terminal
Antenna (aerial) input terminal
AUX input jack (stereo mini jack)
USB port
Power requirements: 12 V DC car battery 
(negative ground (earth))
Dimensions: Approx. 178 u 50 u 177 mm 
(7
1
/
8
 u 2 u 7 in) (w/h/d)
Mounting dimensions: Approx. 182 u 53 u 160 mm 
(7
1
/
4
 u 2
1
/
8
 u 6
5
/
16
 in) (w/h/d)
Mass: Approx. 1.2 kg (2 lb 11 oz)
Supplied accessories: 
Remote commander: RM-X211 (CDX-GT525UR only)
Parts for installation and connections (1 set)
Design and specifications are subject to change 
without notice.
CDX-GT475ER/GT475UR/
GT525UR
SPECIFICATIONS
9-893-555-02
2012K33-1
© 
2012.11
E Model
CDX-GT525UR
Russian Model
CDX-GT475ER/GT475UR
Ver. 1.1  2012.11
Model Name Using Similar Mechanism
CDX-GT470UE/GT520U
Mechanism Type
MG-101CA-188
Optical Pick-up Name
DAX-25A
•  The tuner and CD sections have no adjustments.
Photo: CDX-GT475ER
CDX-GT475ER/GT475UR
FM/MW/LW COMPACT DISC PLAYER
CDX-GT525UR
FM/AM COMPACT DISC PLAYER
CDX-GT475ER/GT475UR/GT525UR
2
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.
FLEXIBLE  CIRCUIT  BOARD  REPAIRING
• 
Keep the temperature of 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.
SAFETY-RELATED  COMPONENT  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.
CAUTION
Use of controls or adjustments or performance of procedures 
other than those specifi ed herein may result in hazardous radia-
tion exposure.
Android is a trademark of Google Inc. Use 
of this trademark is subject to Google 
Permissions.
ZAPPIN and Quick-BrowZer are
trademarks of Sony Corporation.
Windows Media is either a registered 
trademark or trademark of Microsoft 
Corporation in the United States and/or 
other countries.
This product contains technology subject 
to certain intellectual property rights of 
Microsoft. Use or distribution of this 
technology outside of this product is 
prohibited without the appropriate 
license(s) from Microsoft.
MPEG Layer-3 audio coding technology 
and patents licensed from Fraunhofer IIS 
and Thomson.
CDX-GT475ER/GT475UR/GT525UR
3
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 electro-
static 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
Never look into the laser diode emission from right above when 
checking it for adjustment. It is feared that you will lose your sight.
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.
optical pick-up
semi-fixed resistor
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.
1. 
SERVICING  NOTES 
 .............................................   3
2. GENERAL 
 ..................................................................   7
3. DISASSEMBLY
3-1. Disassembly 
Flow 
...........................................................  11
3-2.  Mini Fuse (Blade Type) (10A/32V) (FU1), Cover .........   12
3-3.  Sub Panel Block ..............................................................   12
3-4.  CD Mechanism Deck (MG-101CA-188) .......................   13
3-5.  Connection Cable (Automobile) (
) (USB1) ..............   13
3-6. MAIN 
Board 
...................................................................  14
3-7. SERVO 
Board 
.................................................................  14
3-8.  Chassis (T) Sub Assy ......................................................   15
3-9. Roller 
Arm 
Assy 
..............................................................  15
3-10. Chassis (OP) Assy ...........................................................   16
3-11.  Chucking Arm Sub Assy .................................................   16
3-12. Sled Motor Assy ..............................................................   17
3-13.  Optical Pick-up Section ..................................................   18
3-14. Optical Pick-up ...............................................................   18
4. DIAGRAMS
4-1.  Block Diagram - SERVO Section - ................................   19
4-2.  Block Diagram - MAIN Section - ...................................   20
4-3.  Block Diagram - PANEL/POWER SUPPLY Section - ...   21
4-4.  Schematic Diagram - MAIN Section (1/5) - ...................   23
4-5.  Schematic Diagram - MAIN Section (2/5) - ...................   24
4-6.  Schematic Diagram - MAIN Section (3/5) - ...................   25
4-7.  Schematic Diagram - MAIN Section (4/5) - ...................   26
4-8.  Schematic Diagram - MAIN Section (5/5) - ...................   27
4-9.  Printed Wiring Board - MAIN Section (1/2) - ................   28
4-10.  Printed Wiring Boards - MAIN Section (2/2) - ..............   29
4-11.  Printed Wiring Board - KEY Board -..............................   30
4-12.  Schematic Diagram - KEY Board - ................................   31
5. 
EXPLODED  VIEWS
5-1. Main 
Section 
...................................................................  40
5-2.  Front Panel Section .........................................................   41
5-3.  CD Mechanism Deck Section (MG-101CA-188) ..........   42
6. 
ELECTRICAL  PARTS  LIST 
 ..............................   43
Accessories are given in the last of the electrical parts list.
TABLE  OF  CONTENTS
CDX-GT475ER/GT475UR/GT525UR
4
NOTE  THE  MAIN  BOARD  OR  SYSTEM  CONTROLLER 
(IC501) REPLACING
When the MAIN board or system controller (IC501) is replaced, 
the destination setting is necessary. 
1. Destination Setting
Set destination according to the procedure below.
1-1.  Setting the Destination Code
1.  In the state of source off (the clock is displayed), enter the test 
mode by pressing the buttons in order of the [SHUF 4] t [5] 
t [PAUSE 6] (press only the [PAUSE 6] button for two sec-
onds).
2.  In the state in which the system controller version is displayed 
on the liquid crystal display (refer to following fi gure), enter 
the destination setting mode by pressing the buttons in order 
of the [
> M
 SEEK+] t [SEEK– 
m
 
.
] t [PUSH EN-
TER/MENU].
 
(Displayed characters/values in the following fi gure are ex-
ample)
System controller version
SHUF
3.  Input the alphanumeric character of 12 digits of “F    XXXXXX” 
displayed on the liquid crystal display, and execute the destina-
tion setting.
Note: Refer to following “1-3. Entering the Destination Code” for opera-
tion method.
4.  The resetting operation is executed by pressing the [
 
OFF 
SOURCE] button for 1 second after the setting ends, and the 
unit returns to the normal condition.
1-2.  Display in Destination Setting Mode
(Displayed characters/values in the following fi gure are example)
Destination code
12 digit
OP5 OP4 OP3 OP2 OP1 OP0
SHUF
1-3.  Entering the Destination Code
•  Method of operation by main unit
1.  Rotate the control dial, and select the alphanumeric character 
of “0 to F”.
2.  The digit advances by pressing the [PUSH ENTER/MENU] or 
[
> M
 SEEK+] button.
 
The digit returns by pressing the [  MODE] or [SEEK– 
m
 
.
] button.
3.  The setting is completed by pressing the [PUSH ENTER/
MENU] button, and the initialization operation is done.
•  Method of operation by remote commander
 (CDX-GT525UR 
only)
 
Note: The model to which the remote commander is not attached can 
also be operated by using the remote commander.
1. Press the [ ] or [ ] button, and select the alphanumeric char-
acter of “0 to F”.
2.  The digit advances by pressing the [
] button.
 
The digit returns by pressing the [
] button.
3.  The setting is completed by pressing the [ENTER] button, and 
the initialization operation is done.
1-4. Destination Code
Model
Destination OP5 OP4 OP3 OP2 OP1 OP0
CDX-GT475ER Russian
8
0
B
1
C
7
CDX-GT475UR Russian
8
0
B
1
C
1
CDX-GT525UR E, Mexican
0
0
B
9
C
0
2. Confi rmation After Destination Setting
Execute the following operation after completing the destination 
setting, and confi rm a correct destination was set.
Destination setting checking method:
1.  In the state of source off (the clock is displayed on the liquid 
crystal display),  enter the test mode by pressing the buttons in 
order of the [SHUF 4] t [5] t [PAUSE 6] (press only the 
[PAUSE 6] button for two seconds).
2.  In the state in which the system controller version is displayed 
on the liquid crystal display (refer to following fi gure), enter 
the destination setting value display mode by pressing the [
 
SCRL DSPL] button twice.
 
(Displayed characters/values in the following fi gure are ex-
ample)
System controller version
SHUF
3. Confi rm the alphanumeric character of 12 digits in liquid crys-
tal display is an value correctly input.
 
(Displayed characters/values in the following fi gure are ex-
ample)
Destination code
12 digit
OP5 OP4 OP3 OP2 OP1 OP0
SHUF
4.  The resetting operation is executed by pressing the [
 
OFF 
SOURCE] button for 1 second after the confi rming ends, and 
the unit returns to the normal condition.
Ver. 1.1
Page of 51
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