DOWNLOAD Sony CDX-GT620U / CDX-GT627UE / CDX-GT670U / CDX-GT670US Service Manual ↓ Size: 8.04 MB | Pages: 54 in PDF or view online for FREE

Model
CDX-GT620U CDX-GT627UE CDX-GT670U CDX-GT670US
Pages
54
Size
8.04 MB
Type
PDF
Document
Service Manual
Brand
Device
Car Audio
File
cdx-gt620u-cdx-gt627ue-cdx-gt670u-cdx-gt670us.pdf
Date

Sony CDX-GT620U / CDX-GT627UE / CDX-GT670U / CDX-GT670US Service Manual ▷ View online

SERVICE MANUAL
Published by Sony Techno Create Corporation
Sony Corporation
Audio Business Group
SPECIFICATIONS
CDX-GT670U/GT670US
FM/MW/SW COMPACT DISC PLAYER
9-887-894-02
2008C04-1
© 
2008.03
US Model
Canadian Model
AEP Model
UK Model
CDX-GT620U
E Model
CDX-GT670U/GT670US
Russian Model
CDX-GT620U/GT627UE
Ver. 1.1  2008.03
Model Name Using Similar Mechanism
NEW
CD Drive Mechanism Type
MG-101I-188//Q
Optical Pick-up Name
DAX-25A
•  The tuner and CD sections have no adjustments.
CDX-GT620U/GT627UE/
GT670U/GT670US
(Photo: CDX-GT620U: AEP, UK model)
CDX-GT620U: AEP, UK, Russian model/GT627UE
FM/MW/LW COMPACT DISC PLAYER
CDX-GT620U: US, Canadian model
FM/AM 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:
  CDX-GT620U: US, Canadian model:
  87.5 – 107.9 MHz
  CDX-GT620U: AEP, UK, Russian model:
  87.5 – 108.0 MHz
  CDX-GT670U: E model/GT670US:
  87.5 – 108.0 MHz (at 50 kHz step)
  87.5 – 107.9 MHz (at 200 kHz step)
  CDX-GT670U: Saudi Arabian model:
  87.5 – 108.0 MHz (at 50 kHz step)
 CDX-GT627UE:
  FM1/FM2: 87.5 – 108.0 MHz (at 50 kHz step)
  FM3: 65 – 74 MHz (at 30 kHz step)
FM tuning interval:
  CDX-GT670U: E model/GT670US:
  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
AM
CDX-GT620U: US, Canadian model:
Tuning range: 530 – 1,710 kHz
Antenna (aerial) terminal:
  External antenna (aerial) connector
Intermediate frequency: 10.7 MHz/450 kHz
Sensitivity: 30 
μV
MW/LW
CDX-GT620U: AEP, UK, Russian model/
GT627UE:
Tuning range:
  MW: 531 – 1,602 kHz
  LW: 153 – 279 kHz
Antenna (aerial) terminal:
  External antenna (aerial) connector
Intermediate frequency:
  10.7 MHz/450 kHz
Sensitivity:
 MW: 
30 
μV, LW: 40 μV
MW
CDX-GT670U: E, Saudi Arabian model/
GT670US:
Tuning range:
  CDX-GT620U: E model/GT670US:
  531 – 1,602 kHz (at 9 kHz step)
  530 – 1,710 kHz (at 10 kHz step)
  CDX-GT670U: Saudi Arabian model:
  531 – 1,602 kHz (at 9 kHz step)
MW tuning interval:
  CDX-GT670U: E model/GT670US:
  9 kHz/10 kHz switchable
Antenna (aerial) terminal:
  External antenna (aerial) connector
Intermediate frequency: 10.7 MHz/450 kHz
Sensitivity: 30 
μV
– Continued on next page –
AUDIO POWER SPECIFICATIONS 
(CDX-GT620U: US, Canadian model)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
23.2 watts per channel minimum continuous average power into 
4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more 
than 5% total harmonic distortion.
CDX-GT620U/GT627UE/GT670U/GT670US
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.
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.
SERVICE  NOTES
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.
optical pick-up
semi-fixed resistor
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)
SW
CDX-GT670U: E, Saudi Arabian model/GT670US:
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: 10.7 MHz/450 kHz
Sensitivity: 30 
μV
USB Player section
Interface: USB (Full-speed)
Maximum current: 500mA
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:
  Telephone ATT control 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.
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.
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  COM-  POSANTS  QUE  
PAR  DES  PIÈCES  SONY  DONT  LES  NUMÉROS  SONT  DON-
NÉS  DANS  CE  MANUEL  OU  DANS  LES  SUPPLÉMENTS  
PUBLIÉS  PAR  SONY.
CDX-GT620U/GT627UE/GT670U/GT670US
3
1. 
SERVICE  NOTE
  .....................................................   4
2. GENERAL
 
Location of Controls .......................................................   5
 Connections 
....................................................................  
7
3. DISASSEMBLY
3-1.   Sub Panel Assy  ...............................................................   12
3-2.   CD Mechanism Block .....................................................   12
3-3.   Main Board .....................................................................   13
3-4. Servo 
Board 
....................................................................  13
3-5. Chassis 
(T) 
Sub 
Assy 
......................................................  14
3-6.  Roller Arm Assy ..............................................................   14
3-7. Chassis 
(OP) 
Assy 
...........................................................  15
3-8. Chucking 
Arm 
Sub 
Assy 
.................................................  15
3-9. Sled 
Motor 
Assy 
..............................................................  16
3-10.  Optical Pick-up Section ..................................................   17
3-11. Optical Pick-up ...............................................................   17
4. 
DIAGNOSIS  FUNCTION 
 .....................................   18
5. DIAGRAMS
5-1.  Block Diagram –Main Section– .....................................   21
5-2.  Block Diagram –Display Section– .................................   22
5-3.  Printed Wiring Board –Main Section– ............................   24
5-4.  Schematic Diagram –Main Section (1/4)– ......................   25
5-5.  Schematic Diagram –Main Section (2/4)– ......................   26
5-6.  Schematic Diagram –Main Section (3/4)– ......................   27
5-7.  Schematic Diagram –Main Section (4/4)– ......................   28
5-8.  Printed Wiring Board –Sub Section- ..............................   29
5-9.  Schematic Diagram –Sub Section- .................................   30
5-10.  Printed Wiring Boards –Key Section (1)– ......................   31
5-11.  Schematic Diagram –Key Section (1)– ..........................   32
5-12.  Printed Wiring Boards –Key Section (2)– ......................   33
5-13.  Schematic Diagram –Key Section (2)– ..........................   34
6. 
EXPLODED  VIEWS
6-1. Main 
Section 
...................................................................  41
6-2.  Front Panel Section .........................................................   42
6-3.  CD Mechanism Section (MG-101I-188//Q) ...................   43
7. 
ELECTRICAL  PARTS  LIST
  ..............................   44
TABLE  OF  CONTENTS
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.
This compact disc player is classifi ed as a CLASS 1 LASER 
 
 
 
 
 
product. The CLASS 1 LASER PRODUCT label is located on the 
exterior.
Except GT620U: US, Canadian model
This label is located on the bottom of the chassis.
• CD playback
You can play CD-DA (also containing CD TEXT), CD-R/CD-
RW (MP3/WMA/AAC fi les).
Type of discs
Label on the disc
CD-DA
MP3
WMA
AAC
Ver. 1.1
CDX-GT620U/GT627UE/GT670U/GT670US
4
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 
(CN401) with the extension cable (Part No. J-2502-076-1).
NOTE  FOR  REPLACEMENT  OF  THE  SERVO  BOARD
When repairing, the complete SERVO board (A-1362-921-A) 
should be replaced since any parts in the SERVO board cannot be 
repaired.
NOTE FOR REPLACEMENT OF THE USB CONNECTOR 
(J11)
To replace the USB connector requires alignment.
1.  Insert the USB connector into the front panel.
2.  Place the KEY board on the front panel and align the terminals 
of the USB connector with the holes in the KEY board.
3.  Solder the four terminals of the connector.
NOTE  FOR  THE  24-PIN  CONNECTOR (CN1)
Do not use alcohol to clean the 24-pin connector (CN1) connecting 
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
MAIN BOARD
CN350
J-2502-076-1
KEY board
front panel
USB (socket) connector
Page of 54
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Sony CDX-GT620U / CDX-GT627UE / CDX-GT670U / CDX-GT670US Service Manual ▷ Download

  • DOWNLOAD Sony CDX-GT620U / CDX-GT627UE / CDX-GT670U / CDX-GT670US Service Manual ↓ Size: 8.04 MB | Pages: 54 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony CDX-GT620U / CDX-GT627UE / CDX-GT670U / CDX-GT670US in PDF for free, which will help you to disassemble, recover, fix and repair Sony CDX-GT620U / CDX-GT627UE / CDX-GT670U / CDX-GT670US Car Audio. Information contained in Sony CDX-GT620U / CDX-GT627UE / CDX-GT670U / CDX-GT670US 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.