KDL-39R475A, KDL-42R474A, KDL-42R475A, KDL-46R475A - Sony TV Service Manual (repair manual). Page 22

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KDL-39R475A/42R474A/42R475A/46R475A 18
SECTION 3 - REPAIR INFORMATION
REPLACING THE POWER SUPPLY BOARD
1. 
Remove all connectors from the Power Supply Board.
 
2. 
Locate and remove  screws from Power Supply Board, then lift to 
detach.
3. 
Install the new Power Supply Board, screws and connectors.
4.  Update the Software.
After ALL repairs UPDATE the SOFTWARE to the latest version. 
Instructions are included with the Software package on the Sony 
website.
a. 
Insert the USB device with the latest Software into the TV.
b.  Press 
POWER
 to turn on the TV.
c. 
Wait until the Software update is complete.
REMOVING THE SPEAKERS
1. 
Remove connectors from Speakers. Locate and remove screws from the 
Speaker Cover to release from the Bezel.
2. 
Remove 2 screws from each Speaker and slide upwards to detach.
REMOVING H BOARD
1. 
Disconnect the connector, then locate the 2 Bezel clips and press to 
release the H Board.
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