Sony KD-84X9000 Service Manual page 117

APPENDIX-1
Additional work for ON3 Board replacement
Please remove IC2504 and IC2505 from the original board and exchange these IC's on the board to be replaced, since the IC's have adjustment data for LCD Panel.
At first, please make sure that ON3 board needs to be replaced surely before exchanging IC's, after the confirmation, please exchange them accordingly.
IC2505
XBR/KD-84X9000 Series(WW)
<ON3 Board B-side>
IC2504
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