CDX-GT475ER, CDX-GT475UR, CDX-GT525UR - Sony Car Audio Service Manual (repair manual). Page 5

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CDX-GT475ER/GT475UR/GT525UR
5
NOTE  FOR  REPLACEMENT  OF  THE  AUX  JACK (J901)
To replace the AUX jack requires alignment.
1.  Insert the AUX jack into the front panel.
2.  Place the KEY board on the front panel and align the terminals 
of the AUX jack with the holes in the KEY board.
3.  Solder three terminals of the jack.
KEY board
front panel
AUX jack
(J901)
TEST  DISCS
Use following TEST DISC (for CD) when this set confi rms the 
operation and checks it.
Part No.
   
Description
3-702-101-01 DISC 
(YEDS-18), 
TEST
4-225-203-01 DISC 
(PATD-012), 
TEST
NOTE  FOR  REPLACEMENT  OF  THE  SERVO  BOARD
When repairing, the complete SERVO board should be replaced 
since any parts in the SERVO board cannot be repaired.
NOTE  FOR  REPLACEMENT  OF  THE  SENSOR  BOARD
When the SENSOR board is defective, exchange the MECHANI-
CAL BLOCK (11CA) ASSY.
REPLACING  THE  LITHIUM  BATTERY 
OF  THR  REMOTE  COMMANDER
(CDX-GT525UR only)
CLEANING  THE  CONNECTORS
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.
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.
+ side up
WARNING
Battery may explode if mistreated.
Do not recharge, disassemble, or dispose 
of in fire.
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 your 
fingers or with any metal device.
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