CE Tech Tips — June 2021

Hitachi TV, L32A403
Reason for Service: Set comes on, works okay for an hour then panel shuts
off; sound and other functions work. Turning the TV off, then back on,
set works again for an hour then repeats.
Solution: Replacing inverter board assembly fixed the set. 

Hitachi TV, 57F59A
Reason for Service: No video or weak video. No voltage on the
ABL pin of the fly.
Solution: Replaced open RH28. 

Hitachi TV, 57F59A
Reason for Service: HDMI issues, changes colors, snowy picture,
loss of one or more colors, all white, shuts down.
Solution: Replace Signal Board and make sure software
Hitversion is V201 or higher. 

LG TV, 60LS5750
Reason for Service: After set is on for a few minutes, screen has
many red vertical lines, then picture turns off, but audio remains.
Fix: Replacing T-Con fixed the set.

Panasonic TV, TC-32LX85
Reason for Service: No power.
Solution: Found bad photo opto in power supply. PC7000.

Samsung TV, UN40F5500
Reason for Service: Dead, 2 blink error code.
Solution: Found SM RS802 that feeds the opto was open. Replacing fixed the set. 10 ohm. 

Sony TV, KDL-40V4100
Reason for Service: No video.
Solution: No 12V to T-Con. Replaced U21, (AS15F) on T-Con and replaced F1422/1421 on BU Board.

Sony TV, KV40XBR800
Reason for Service: Dead set.
Solution: Replacing relay RY6502 fixed the set.