KDL-22EX320, KDL-22EX325, KDL-24EX320, KDL-24EX325, KDL-26EX320, KDL-26EX321, KDL-26EX325, KDL-32CX520, KDL-32CX521, KDL-32CX523, KDL-32CX525, KDL-32EX421, KDL-32EX425, KDL-32EX520, KDL-32EX521, KDL-32EX523, KDL-32EX524, KDL-32EX525, KDL - Sony TV Service Manual (repair manual). Page 27

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Service Procedure for Panel, Board and Software Change / Upgrade(WW)
27
[Steps for upgrading the version]
1. When you turn on the set after replacing the BAT board, the green LED and amber LED may blink (Usually if no image and sound are
generated) – This is not a problem. 
1.1. Even so, insert USB for upgrade into the USB slot on the set while the set is turned on.
Note: Please power on by the power button of TV or remote commander within 5 seconds if TV is go to standby when inserting the 
AC plug. 
2. After inserting USB, the green LED and amber LED blink for a while. The set will be reset about a minute later, and then the Standby LED 
lights and the Communication LED blinks.
Note: After replacing the BAT board, the upgrade startup screen may not be displayed. In addition, be sure 
not
to remove USB while it is 
writing.
3. After the writing is complete, the set is rebooted and the screen indicating the upgrade is complete is displayed. Remove USB from the set and 
press the “Enter” button while the set is turned on.
2-3. How to Upgrade the Version by Using USB
SERVICE PANEL
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