[TechAssist] Re: FIXed....Zenith A25A23W 9-1996 GA-3 chassis shuts down
- From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 26 Jul 2003 08:25:15 -0400
Bob,
Thanks for the reply...I kind of placed a cap in backwards...replaced and unit
is fine...
Vertical IC still runs warm, but I can't find any other problems.
Jeff Dougherty
Intrepid Video TV/VCR
263 S Front St
Steelton PA 17113
fax...717-564-4952
www.intrepid-video.com www.tech-repair.net
----- Original Message -----
From: "Bob@Bobs tv" <woodman1@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, July 25, 2003 10:05 AM
Subject: [TechAssist] Re: Zenith A25A23W 9-1996 GA-3 chassis shuts down
Jeff,
Most likely not a component repair...Scrape the paint away from foil,
look for hair line cracks. Found a few from the supply diode at the fly,
right corner to the vert fuse resistor.. Its so erratic ohm test will not
find it... SMD's C2103M 220pf/50v pin 2&4 IC2100 C2107M 1000pf/50v pin 5
to ground IC2100... There is a manual I downloaded B25A11.. that you can use
for this model..
Bob,
Bobs TV Worcester, ma
woodman1@xxxxxxxx
Main 508-853-1482
Fax 508-853-1480
----- Original Message -----
From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
To: "Techassist" <techassist@xxxxxxxxxxxxx>
Sent: Thursday, July 24, 2003 9:57 PM
Subject: [TechAssist] Zenith A25A23W 9-1996 GA-3 chassis shuts down
> This unit came in for intermittent vertical collapse, tapping affected. I
did confirm the problem, but
> when it came time to work on unit, I could NOT get it to act up. I
replaced all the caps in the vertical
> section and after the last cap, the unit would not stay on. It would start
to build high voltage, then
> shutdown. Unplug and try again and same thing.
> Before this occurred, the vertical IC heat sink was really warm, so I
replaced the IC (TDA8174) and no
> help. I did use Zenith #221-00992.
> Also, is there a surface mount resistor between pin 2,4 of vertical IC,
that my solder wick may have
> eaten?
> Would anyone have any advice before I tackle this thing on Fri?
> Thanks.
>
>
> Jeff Dougherty
> Intrepid Video TV/VCR
> 263 S Front St
> Steelton PA 17113
> ph..717-939-7708 fax...717-564-4952
> www.intrepid-video.com www.tech-repair.net
>
>
>
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