[TechAssist] FIX: 1990 Hitachi PTV model CU4601
- From: tjanphyl@xxxxxxxxxxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 22 Jun 2005 14:36:51 -0400
Be sure to send this back to Alvie for their records.That's all he
asks us to do and he's so nice.
Phil
----- Original Message -----
From: peggs <peggs@xxxxxxxxxxxxx>
Date: Wednesday, June 22, 2005 4:38 pm
Subject: [TechAssist] Re: 1990 Hitachi PTV model CU4601
> 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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