All,
Got a Samsung hpt5054 plasma tv.
Started with revolving relay on PSU.
The 50 inch tv we found the y sustain board suffered from 3 bad caps, fuse,and a MOSFET that suffered failure...it failed relatively badly also involving a couple resistors possibly around the MOSFET. (burnt)
Went route of replacing with a matching ysustain board.
Not knowing a lot i checked the two y buffers....I did a continuity test but picked random connection on y sustain side and did quick across all pins on tv panel cable side (twice)...they appear to test good....but again not sure on the ysustain side if needed to be specific pin connection.
Put replacement board in and now relay on psu looks good (no rolling).The voltages check out 208,63,15.
The screen energizes...black screen...color static appears initially (second or less)...afterwards a occassional pixel lights up (not black)...the remote can turn on and off power to tv...but no picture/menu/etc.
Someone suggested xmain board... i got a service manual...mosfets seem ok...fuses suggested to test seem ok...on xmain.
Any suggestions?...verification its xmain....should i test ybuffer boards again?...Panel looks ok..used powerful LED light to check out panel for blemishes etc...would love detail description on how plasma tvs work.
Thanks in advance,
Chris
Got a Samsung hpt5054 plasma tv.
Started with revolving relay on PSU.
The 50 inch tv we found the y sustain board suffered from 3 bad caps, fuse,and a MOSFET that suffered failure...it failed relatively badly also involving a couple resistors possibly around the MOSFET. (burnt)
Went route of replacing with a matching ysustain board.
Not knowing a lot i checked the two y buffers....I did a continuity test but picked random connection on y sustain side and did quick across all pins on tv panel cable side (twice)...they appear to test good....but again not sure on the ysustain side if needed to be specific pin connection.
Put replacement board in and now relay on psu looks good (no rolling).The voltages check out 208,63,15.
The screen energizes...black screen...color static appears initially (second or less)...afterwards a occassional pixel lights up (not black)...the remote can turn on and off power to tv...but no picture/menu/etc.
Someone suggested xmain board... i got a service manual...mosfets seem ok...fuses suggested to test seem ok...on xmain.
Any suggestions?...verification its xmain....should i test ybuffer boards again?...Panel looks ok..used powerful LED light to check out panel for blemishes etc...would love detail description on how plasma tvs work.
Thanks in advance,
Chris
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