[TechAssist] Re: Panasonic 20" TV - PC-20L52R - Chassis? - Dead - FIXED
- From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 5 Apr 2004 14:21:16 +0100
This TV was plagued with a bunch of cold solder joints. The main
culprits were on the stand-up board which contains the micro and relay
circuits. Probing around with my DMM caused the TV to fire up, scared
the crap out of me, then it was simply a hunt and peck method to isolate
the intermittent(s).
Thanks for the direction Jim.
David Lessard
mr_fixit@xxxxxxxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of becyn
Sent: Monday, April 05, 2004 6:48 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Panasonic 20" TV - PC-20L52R - Chassis? - Dead
- Followup
why don't you look at the relay driver transistor base? many times the
transistor IS the problem.
Jim McVey
McVey Alltronix
327 Broadway
Newburgh Ny 12550
ph: 845 561 8383
fx: 845 561 9017
Consumer electronics &
computer service.
Factory authorized for
over twenty brands.
----- Original Message -----
From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, April 05, 2004 7:58 AM
Subject: [TechAssist] Re: Panasonic 20" TV - PC-20L52R - Chassis? - Dead
-
Followup
> I was able to confirm +5VDC standby power off Q19 is present. However
> when the power ON button is pressed the MAIN relay does not activate.
> What is the power ON pin off the micro on this chassis? I need to
start
> somewhere.
>
> Again thanks,
>
> David Lessard
> Alexandria Electronics
> mr_fixit@xxxxxxxxxxxx
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of David Lessard
> Sent: Monday, April 05, 2004 11:28 AM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Panasonic 20" TV - PC-20L52R - Chassis? - Dead
>
> OK, when you all stop laughing, could you help out with some
information
> on this oldie? The customer wants this fixed and is willing to pay
$100,
> apparently the TV is sentimental. Fuses F0001 & F0002 are OK, HOT is
OK,
> I haven't done much else (yet), trying to gather some information
first,
> i.e. standby PS, ID the micro IC, etc. If any of you techs out there
> have some pointers, I'll take them.
>
>
> Thanks in advance,
>
>
>
> David Lessard
>
> Alexandria Electronics
>
> 50 Harrison Street
>
> P.O. Box 1366
>
> Alexandria, Ontario.
>
> Canada
>
> K0C-1A0
>
> mr_fixit@xxxxxxxxxxxx
>
>
>
>
>
>
>
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