221k (220pF, 1KV) capacitor. The info was barely legible on the burned component. A hi-res scan did the trick.
New to the forum as I recently acquired an LC-40E77UN (60Hz) that I was told had no picture, but had sound. From experience with other LCDs, it seemed like another case of bad caps to me.
I removed the back cover and plugged it in. I saw arching under a metal shield on the power supply (RDENCA354WJQZ / Delta DPS 208BPA). I disconnected the power and easily tracked down a BUBAR (burned up beyond all recognition) capacitor at C7816.
Does anyone know/have the info on that little gem, or possibly a Delta board schematic? I have searched and checked a few
places online with no luck. The Sharp service manual does not have the Delta power supply schematic.
I did hook it up to cable afterwards, plugged it in, and it displayed a black/white static screen, AND a nice clear Channel 34 TV
station logo for a few seconds before blinking out to a black screen. I did not have time to switch to check the Channel 3 cable box feed.
The power (P) blink code repeats 2x per second (bad power supply).
OPC blinks once every two seconds.
Two other Delta power supplies use an almost identical PCB form factor, so it may be possible that the same C7816 capacitor is
on the following power supplies:
Sharp Power Supply Board Part# DPS-219AP A, RDENCA298WJQZ
Sharp Power Supply Board Part # DPS-226AP / RDENCA334WJQZ
Any help would be appreciated. Thanks!
Replacement boards are in the $60 range, but where's the fun in that?
In the attached photo:
Top left: The power board, DPS-208BP (RDENCA354WJQZ)
Bottom left (rotated 90 degrees): Burned out capacitor at C7816
Right side: Underneath the circuit board at C7816