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From: larmo22 on 30 Mar 2005 08:23

Hope someone can help me! I've got a 4 year TV that went dead when I
went on vacation last year.

I already bought another one, so this is a project for me since I have
electronics experience.

When I push the power button (or remote), the TV tries to cycle on (3
times) then it stops trying.

Looking at previous posts, this one looks original.
I don't have a chipper checker.
I can't get the set to come up using the power, setup ... sequence.

I have checked resistors, they seem to be ok.
Diodes are checking out good.
Transistors are looking pretty good.

I'm getting 168.8VDC at CR14203/CR14201 when I'm supposed to be reading
approx 156V.
That seems to be driving all my other voltages high.
I think it could be a transformer but I'm not sure.

Also, I did get a SAMS Photosheet so I have a schematic in front of me.

Thanks for the help
Larry


--
larmo22
From: kip on 30 Mar 2005 18:04
Check for dry joints in horizontal sections !!!!!
Also check for s/c diodes ...

kip
"larmo22" <larmo22.1mqa9n(a)news.diybanter.com> wrote in message
news:larmo22.1mqa9n(a)news.diybanter.com...
>
> Hope someone can help me! I've got a 4 year TV that went dead when I
> went on vacation last year.
>
> I already bought another one, so this is a project for me since I have
> electronics experience.
>
> When I push the power button (or remote), the TV tries to cycle on (3
> times) then it stops trying.
>
> Looking at previous posts, this one looks original.
> I don't have a chipper checker.
> I can't get the set to come up using the power, setup ... sequence.
>
> I have checked resistors, they seem to be ok.
> Diodes are checking out good.
> Transistors are looking pretty good.
>
> I'm getting 168.8VDC at CR14203/CR14201 when I'm supposed to be reading
> approx 156V.
> That seems to be driving all my other voltages high.
> I think it could be a transformer but I'm not sure.
>
> Also, I did get a SAMS Photosheet so I have a schematic in front of me.
>
> Thanks for the help
> Larry
>
>
> --
> larmo22


From: RonKZ650 on 30 Mar 2005 18:57
Extra volts at the diodes you are looking at has nothing to do with
your problem, the voltage you are reading is purely a function of your
AC voltage from the wall. What you need to check mainly to start is
your DC voltage on the 130v supply at CR14106. It may be 140v or more
with set off but should immediately drop to 130v when the set is turned
on. If it's too high when the set is turned on, the set will turn
itself off. If this is the case check voltage at CR14704 off the
flyback when the set is turned on. If you're missing this 14v supply
from a bad diode this problem can happen.

From: Art on 31 Mar 2005 05:54
L14401 at base of H_Output. Remove it, clean up the glue, reinstall it after
throughly cleaning the leads and the solder pads, ring the LOPT.
"RonKZ650" <RonKZ650(a)aol.com> wrote in message
news:1112227037.197745.3590(a)o13g2000cwo.googlegroups.com...
> Extra volts at the diodes you are looking at has nothing to do with
> your problem, the voltage you are reading is purely a function of your
> AC voltage from the wall. What you need to check mainly to start is
> your DC voltage on the 130v supply at CR14106. It may be 140v or more
> with set off but should immediately drop to 130v when the set is turned
> on. If it's too high when the set is turned on, the set will turn
> itself off. If this is the case check voltage at CR14704 off the
> flyback when the set is turned on. If you're missing this 14v supply
> from a bad diode this problem can happen.
>


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