Philips 41JP20 shutdown

[James Sweet]

Ok I'm back again with this pesky thing. Finally got the replacement Diemen
flyback, installed it, set came up but HV was about 8kv. Realized pins 1 and
3 need to be swapped for it to be wired as in the schematic, do that and set
comes up more or less normal. Now the bad news, I shut it off, unplugged it,
and put in the rest of the screws holding the power board in, plug it in and
turn it on, it fires up for a moment then shuts down. Monitored the HV,
fired it up again, HV comes up normal for a moment before relay clicks and
the set shuts down. I'm at my wit's end with this thing, what things can
cause shutdown with this set and where do I start?

 

[techforce]

Could be bad solder on the power board that when screwed down cause bad
connection. The Really old NAP's had bad solder Feed-thru's on the old
Boards, and sometimes even on the AC Line Terminals, causing the Flyback to
fail because it would be overheating. I would go through all the solder
everywhere since its an older set.


| Ok I'm back again with this pesky thing. Finally got the replacement
Diemen
| flyback, installed it, set came up but HV was about 8kv. Realized pins 1
and
| 3 need to be swapped for it to be wired as in the schematic, do that and
set
| comes up more or less normal. Now the bad news, I shut it off, unplugged
it,
| and put in the rest of the screws holding the power board in, plug it in
and
| turn it on, it fires up for a moment then shuts down. Monitored the HV,
| fired it up again, HV comes up normal for a moment before relay clicks and
| the set shuts down. I'm at my wit's end with this thing, what things can
| cause shutdown with this set and where do I start?
|
|

 

[James Sweet]

Could be bad solder on the power board that when screwed down cause bad
connection. The Really old NAP's had bad solder Feed-thru's on the old
Boards, and sometimes even on the AC Line Terminals, causing the Flyback to
fail because it would be overheating. I would go through all the solder
everywhere since its an older set.

Already did that the first time I fixed it before the flyback failed, guess
I can go through it again though.

 

[techforce]

The fact you said it changed when everything was buttoned up would tell me
it has something to do with that action. Try Running it un-buttoned, and
Flex / Vibrate the boards in question.


|
| | > Could be bad solder on the power board that when screwed down cause bad
| > connection. The Really old NAP's had bad solder Feed-thru's on the old
| > Boards, and sometimes even on the AC Line Terminals, causing the
Flyback
| to
| > fail because it would be overheating. I would go through all the solder
| > everywhere since its an older set.
| >
|
|
| Already did that the first time I fixed it before the flyback failed,
guess
| I can go through it again though.
|
|

 

[James Sweet]

The fact you said it changed when everything was buttoned up would tell me
it has something to do with that action. Try Running it un-buttoned, and
Flex / Vibrate the boards in question.

Yeah, though I also thought that perhaps the power cycle caused something to
pop, I'll have to go through it again.