Sony KD-55A9G Service Manual page 64

2019/04/19 01:55:00 (GMT+09:00)
4.4 NO PICTURE: @ TUNER
4.4 NO PICTURE: @ TUNER
FOR 12V LNB Voltage Checking: @ AEP and JP
+12V_LNB Voltage Checking
OK OK
OK
Check LNB power line Check P_ON_HL signal line MOSFET
Check fuse F2801
+12V_MAIN at R495 = 12V? at CL810(R826) = 3.3V? Q408/Q409 broken
NG
NG
NG
Change the fuse
OK
Check +12V_Main at CN800 Please confirm Power
(JL801/JL810) Sequence u-com
NG
NG
Check harness between
Harness broken
B-Board and G-board
OK
Please refer G-board
troubleshooting
64
64
TV Business Division
SYS SET