I have this Sharp LC-55UB30U in the shop and it doesn't want to Power up, show a stand by light, no backlights, no sound but all my normal voltages seem to be present.
Power Supply part # 0500--0605-0910
Main Video Board # 3655-1112-0150
T-Con LJ94-32662F
Power Supply
CN102
Pin 1-3 5v stby 5.246 5.24
Pin 4-6 12v 12.25 12.25
RMT On 4.938 4.93
BL On/off 0.110
Dimming 0.399 power on 0.387
Dimming 0.399 0.386
Main
U32 in 5.2 out 3.26 adj 2.06
U27 in 3.4 out 1.82 adj 0.58<-----adj too low?
U17 pin 1 12.24v
U20 pin 1 1.513v
Tcon Fuse both sides off 0.495v on 0.525v
Tv standby light does not light up at plug in and no optical led on at power up, just dead. I couldn't find the same Main Video Board but Encompass said they had a sub so I ordered it and it looked identical and fired the Tv right up...except for one BIG problem...the picture was upside down and there was no way to get into the service menu trying 3-4 methods so we determined the Main was the wrong version as this Tv is very version specific. The picture looked great, but nothing in the menu or remote to flip the picture like some Sharp's I've seen. Do you think that U27 Volt Reg adj is too low and maybe suspect? Marking look like reverse C 11 5NC 1117. Can't seem to find the same one in digikey or mouser. Anybody have any suggestions?
Power Supply part # 0500--0605-0910
Main Video Board # 3655-1112-0150
T-Con LJ94-32662F
Power Supply
CN102
Pin 1-3 5v stby 5.246 5.24
Pin 4-6 12v 12.25 12.25
RMT On 4.938 4.93
BL On/off 0.110
Dimming 0.399 power on 0.387
Dimming 0.399 0.386
Main
U32 in 5.2 out 3.26 adj 2.06
U27 in 3.4 out 1.82 adj 0.58<-----adj too low?
U17 pin 1 12.24v
U20 pin 1 1.513v
Tcon Fuse both sides off 0.495v on 0.525v
Tv standby light does not light up at plug in and no optical led on at power up, just dead. I couldn't find the same Main Video Board but Encompass said they had a sub so I ordered it and it looked identical and fired the Tv right up...except for one BIG problem...the picture was upside down and there was no way to get into the service menu trying 3-4 methods so we determined the Main was the wrong version as this Tv is very version specific. The picture looked great, but nothing in the menu or remote to flip the picture like some Sharp's I've seen. Do you think that U27 Volt Reg adj is too low and maybe suspect? Marking look like reverse C 11 5NC 1117. Can't seem to find the same one in digikey or mouser. Anybody have any suggestions?
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