CDX-GT420U, CDX-GT424U, CDX-GT427UE, CDX-GT470U, CDX-GT470US - Sony Car Audio Service Manual (repair manual). Page 5

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CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
5
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.
SERVO BOARD 
CN401
MAIN BOARD 
CN350
J-2502-076-1
KEY board 
front panel 
USB (socket) connector 
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