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Padraig
Joined: 04 Jan 2007
Posts: 2
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 Posted: Sat Jan 06, 2007 8:53 pm Post subject: Mitsubishi BD28 - 11AK19 |
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Think this is a 11AK19PRO chassis.
During recent PSU repair replaced Q802(s/c), D826(s/c), D827(s/c),
R825(o/c), IC802(as percaution) and also D807(PCB scorched even though this
diode ok). Set appears to work fine, but fails again after a few days -
will not come out of standby. D807 (BA159) found s/c both times. Any hints
why D807 keeps failing? Is s/c more likely from overcurrent or overvoltage
spike?
Great Site - would not have had TV for Christmas without it |
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Frank
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| Posted: Sun Jan 07, 2007 12:05 am Post subject: |
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| My idea is that you forgot to check the caps, those are mostly like the cause of most faults, ESR is important because they may check good capacitance but they dry. |
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Padraig
Joined: 04 Jan 2007
Posts: 2
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| Posted: Mon Jan 08, 2007 12:29 am Post subject: |
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Frank,
Thanks for the reply.
I don't really have any way to check capacitors. I'll just wait 'till another failure and either replace all PSU caps, leave to a repair shop, or replace the set. I haven't repaired anything electronic for about 15 years. Still fun.
Thanks again.
Padraig |
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