[TechAssist] Re: 1990 Hitachi PTV model CU4601
- From: peggs <peggs@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx, techassist@xxxxxxxxxxxxx
- Date: Wed, 22 Jun 2005 13:38:53 -0700
After a lot of help from Victor Santana at Hitachi,and Alvie Rodgers,and a
lot of patience
with my oscilloscope skills........ lol....... I found a corroded lead on
Q502 in the Comb Filter Circuit.
One of the previously replaced Leaking Capacitors(C502) next to it,had
corroded the Collector Lead
of Q502.I replaced it with a 2SC1740.
All is well with all inputs........ now I just need my $325 ........ lol
Peggs
At 03:30 PM 6/16/05, peggs wrote:
>This unit has some type of video 'interference' problem.
>Both on tuner and the AV inputs.It's hard to describe.
>Similar to a slight AGC overload problem.
>I've replaced numerous 'leaky' caps on this AV/Video/Chroma board.
>They are on other boards in here as well.Most of these
>bad caps are Blue,100uF @ 16v.
>Heat and chill doesn't help isolate the culprit(s).
>Any tips on an old hitachi model CU4601K ???
>
>Hitachi website didn't offer much help......
>
>Peggs
>Peggs' Electronics
>1519 West 2nd Street
>Owensboro,KY 42301
>270-926-4968
>fax 270-686-7399
>peggs@xxxxxxxxxxxxx
>
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