DOWNLOAD Sony CDX-GT270MP / CDX-GT274MP / CDX-GT277ME / CDX-GT320MP Service Manual ↓ Size: 4.85 MB | Pages: 41 in PDF or view online for FREE

Model
CDX-GT270MP CDX-GT274MP CDX-GT277ME CDX-GT320MP
Pages
41
Size
4.85 MB
Type
PDF
Document
Service Manual
Brand
Device
Car Audio
File
cdx-gt270mp-cdx-gt274mp-cdx-gt277me-cdx-gt320mp.pdf
Date

Sony CDX-GT270MP / CDX-GT274MP / CDX-GT277ME / CDX-GT320MP Service Manual ▷ View online

SERVICE MANUAL
Sony Corporation
Published by Sony Techno Create Corporation
CDX-GT270MP/GT274MP/
GT277ME/GT320MP
SPECIFICATIONS
9-893-494-02
2012I33-1
© 
2012.09
US Model
Canadian Model
CDX-GT270MP
AEP Model
UK Model
CDX-GT270MP/GT274MP
E Model
CDX-GT320MP
Russian Model
CDX-GT277ME
Ver. 1.1  2012.09
Model Name Using Similar Mechanism
CDX-GT260MP/GT267ME/GT310MP
Mechanism Type
MG-101X-188
Optical Pick-up Name
DAX-25A
•  The tuner and CD sections have no adjustments.
US, Canadian, E, Mexican, Argentina and Korean models
FM/AM COMPACT DISC PLAYER
AEP, Russian and UK models
FM/MW/LW COMPACT DISC PLAYER
Saudi Arabia model
FM/MW/SW COMPACT DISC PLAYER
Tuner section 
(US and Canadian models)
(US and Canadian models)
(US and Canadian models)
(AEP and UK models)
FM
Tuning range: 
87.5 – 107.9 MHz
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: 
530 – 1,710 kHz
Antenna (aerial) terminal: 
External antenna (aerial) connector
Intermediate frequency: 
9,115 kHz or 9,125 kHz/5 kHz
Sensitivity: 26 μV
CD Player section
Signal-to-noise ratio: 120 dB
Frequency response: 10 – 20,000 Hz
Wow and flutter: Below measurable limit
Power amplifier section
Output: Speaker outputs
Speaker impedance: 4 – 8 ohms
Maximum power output: 52 W × 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)
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 × 177 mm 
(7
1
/
8
 × 2 × 7 in) (w/h/d)
Mounting dimensions: Approx. 182 × 53 × 160 mm 
(7
1
/
4
 × 2
1
/
8
 × 6
5
/
16
 in) (w/h/d)
Mass: Approx. 1.2 kg (2 lb 11 oz)
Design and specifications are subject to change 
without notice.
CEA2006 Standard
Power Output: 17 Watts RMS    4 at 
4 Ohms < 1% THD+N 
SN Ratio: 80 dBA 
(reference: 1 Watt into 4 Ohms)
AUDIO POWER SPECIFICATIONS
FOR UNITED STATES CUSTOMERS. NOT 
APPLICABLE IN CANADA, INCLUDING 
IN THE PROVINCE OF QUEBEC.
POUR LES CONSOMMATEURS AUX 
ÉTATS-UNIS. NON APPLICABLE AU 
CANADA, Y COMPRIS LA PROVINCE DE 
QUÉBEC.
Tuner section
(E, Mexican, Argentina and
Korean models)
FM
Tuning range:
For non-Argentine models:
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)
For Argentine models:
87.5 – 107.9 MHz
FM tuning step (for non-Argentine models): 
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:
 
For non-Argentine models:
531 – 1,602 kHz (at 9 kHz step)
530 – 1,710 kHz (at 10 kHz step)
For Argentine models:
530 – 1,710 kHz
AM tuning step (for non-Argentine models):
9 kHz/10 kHz switchable
Antenna (aerial) terminal: 
External antenna (aerial) connector
Intermediate frequency: 
For non-Argentine models:
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)
For Argentine models:
9,115 kHz or 9,125 kHz/5 kHz
Sensitivity: 26 μV
Tuner section 
FM
Tuning range: 
Antenna (aerial) terminal: 
External antenna (aerial) connector
FM1/FM2: 87.5 – 108.0 MHz 
 
(at 50 kHz step)
FM3: 65 
– 
74 
MHz 
 
(at 30 kHz step)
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
Supplied accessories: 
Remote commander: RM-X201 (US , Canadian,
E, Saudi Arabia, Mexican, Argentina and
Korean models only)
Parts for installation and connections (1 set)
Tuner section
FM
Tuning range: 
87.5 – 108.0 MHz
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
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
Tuning range:
 531 – 1,602 kHz
Antenna (aerial) terminal: 
External antenna (aerial) connector
Intermediate frequency: 
9,124.5 kHz or 9,115.5 kHz/4.5 kHz
Sensitivity: 26 μV
SW
Tuning range:
SW1: 2,940 – 7,735 kHz
SW2: 9,500 – 18,135 kHz
(except for 10,140 – 11,575 kHz)
Antenna (aerial) terminal: 
External antenna (aerial) connector
Intermediate frequency: 
9,124.5 kHz or 9,115.5 kHz/4.5 kHz
Sensitivity: 26 μV
(Russian model)
(Saudi Arabia model)
Photo: CDX-GT274MP
CDX-GT270MP/GT274MP/GT277ME/GT320MP
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.
ATTENTION  AU  COMPOSANT  AYANT  RAPPORT  
À  LA  SÉCURITÉ!
LES  COMPOSANTS  IDENTIFIÉS  PAR  UNE  MARQUE  
0  SUR  
LES  DIAGRAMMES  SCHÉMATIQUES  ET  LA  LISTE  DES  
PIÈCES  SONT  CRITIQUES  POUR  LA  SÉCURITÉ  DE  FONC-
TIONNEMENT.  NE  REMPLACER  CES  COMPOSANTS  QUE  
PAR  DES  PIÈCES  SONY  DONT  LES  NUMÉROS  SONT  DON-
NÉS  DANS  CE  MANUEL  OU  DANS  LES  SUPPLÉMENTS  
PUBLIÉS  PAR  SONY.
CAUTION
Use of controls or adjustments or performance of procedures 
other than those specifi ed herein may result in hazardous radia-
tion exposure.
US and Canadian models:
CAUTION
The use of optical instruments with this 
product will increase eye hazard.
For the State of California, USA only
Perchlorate Material – special handling 
may apply, See 
www.dtsc.ca.gov/hazardouswaste/perchlorate
Perchlorate Material: Lithium battery 
contains perchlorate
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.
1. 
SERVICING  NOTES 
 .............................................  
3
2. GENERAL 
 ..................................................................  
6
3. DISASSEMBLY
3-1. Disassembly 
Flow 
...........................................................  13
3-2.  Fuse (Blade Type) (10A/32V) (FU1), Cover ..................   13
3-3.  Sub Panel Block ..............................................................   14
3-4.  CD Mechanism Deck (MG-101X-188) ..........................   14
3-5. MAIN 
Board 
...................................................................  15
3-6. SERVO 
Board 
.................................................................  15
3-7.  Chassis (T) Sub Assy ......................................................   16
3-8. Roller 
Arm 
Assy 
..............................................................  16
3-9. DAXEV08 
......................................................................  17
3-10.  Chucking Arm Sub Assy .................................................   17
3-11. Sled Motor Assy 
..............................................................   18
3-12.  Optical Pick-up Block .....................................................   19
3-13. Optical Pick-up ...............................................................   19
4. DIAGRAMS
4-1. Printed 
Wiring 
Boards 
- MAIN Section (Except Saudi Arabia model) - .............   21
4-2.  Schematic Diagram - MAIN Section (1/2) - ...................   22
4-3.  Schematic Diagram - MAIN Section (2/2) - ...................   23
4-4.  Printed Wiring Board - KEY Board -..............................   24
4-5.  Schematic Diagram - KEY Board - ................................   25
5. 
EXPLODED  VIEWS
5-1. Main 
Section 
...................................................................  30
5-2.  Front Panel Section .........................................................   31
5-3.  CD Mechanism Section (MG-101X-188) .......................   32
6. 
ELECTRICAL  PARTS  LIST 
 ..............................   33
Accessories are given in the last of the electrical parts list.
TABLE  OF  CONTENTS
Note: Refer to SUPPLEMENT-1 for printed wiring board of the 
MAIN board (CDX-GT320MP: Saudi Arabia model).
Ver. 1.1
CDX-GT270MP/GT274MP/GT277ME/GT320MP
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.
Ver. 1.1
CLEANING  THE  CONNECTORS
The unit may not function properly if the connectors 
between the unit and the front panel are not clean. In order 
to prevent this, detach the front panel and clean the 
connectors with a cotton swab. Do not apply too much force. 
Otherwise, the connectors may be damaged. 
Notes
t For safety, turn off the ignition before cleaning the connectors, 
  and remove the key from the ignition switch.
t Never touch the connectors directly with yofingers or with 
  any metal device.
(US, Canadian, E, Saudi Arabia, Mexican,
Argentina and Korean models)
REPLACING  THE  LITHIUM  BATTERY
OF  THE  REMOTE  COMMANDER
When the battery becomes weak, the range 
of the remote commander becomes shorter. 
Replace the battery with a new CR2025 
lithium battery. Use of any other battery 
may present a risk of fire or explosion.
Notes on the lithium battery
t Keep the lithium battery out of the reach of 
children. Should the battery be swallowed, 
immediately consult a doctor.
t Wipe the battery with a dry cloth to assure a 
good contact.
t Be sure to observe the correct polarity when 
installing the battery.
t Do not hold the battery with metallic tweezers, 
otherwise a short-circuit may occur.
+ side up
WARNING
Battery may explode if mistreated.
Do not recharge, disassemble, or dispose 
of in fire.
CDX-GT270MP/GT274MP/GT277ME/GT320MP
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)
SHUF
System controller version
3.  Input the alphanumeric character of 8 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)
SHUF
Destination code
8 digit
OP5 OP4 OP3 OP2 OP1 OP0
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 [ ] or [SEEK– 
. m
] but-
ton.
3.  The setting is completed by pressing the [PUSH ENTER/
MENU] button, and the initialization operation is done.
•  Method of operation by remote commander
 
(US, Canadian, E, Saudi Arabia, Mexcian, Argentina 
and Korean models 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-GT270MP
US, Canadian
0
0
B
0
0
2
AEP, UK
0
0
B
0
0
1
CDX-GT274MP AEP, UK
0
0
B
0
0
1
CDX-GT277ME Russian
8
0
B
0
0
7
CDX-GT320MP
E, Mexican, 
Korean
0
0
B
8
0
0
Argentina
0
0
B
8
0
3
Saudi Arabia
0
0
B
8
0
4
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)
SHUF
System controller version
3. Confi rm the alphanumeric character of 8 digits in liquid crystal 
display is an value correctly input.
 
(Displayed characters/values in the following fi gure are ex-
ample)
SHUF
Destination code
8 digit
OP5 OP4 OP3 OP2 OP1 OP0
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 41
Display

Sony CDX-GT270MP / CDX-GT274MP / CDX-GT277ME / CDX-GT320MP Service Manual ▷ Download

  • DOWNLOAD Sony CDX-GT270MP / CDX-GT274MP / CDX-GT277ME / CDX-GT320MP Service Manual ↓ Size: 4.85 MB | Pages: 41 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony CDX-GT270MP / CDX-GT274MP / CDX-GT277ME / CDX-GT320MP in PDF for free, which will help you to disassemble, recover, fix and repair Sony CDX-GT270MP / CDX-GT274MP / CDX-GT277ME / CDX-GT320MP Car Audio. Information contained in Sony CDX-GT270MP / CDX-GT274MP / CDX-GT277ME / CDX-GT320MP Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.