[TechAssist] Re: 1990 Hitachi PTV model CU4601
- From: peggs <peggs@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx, techassist@xxxxxxxxxxxxx
- Date: Sun, 26 Jun 2005 19:05:21 -0700
This set is fixed and gone,but for those that didn't see the Fix
posted..........
the symptom(which is difficult to describe) was on RCA Jack inputs(all) and
to a
lesser degree on Antenna input.But it was NOT there on S-Video,nor at the
Video output Jack on ANY input,which (not to my knowledge at the time)
meant the problems were in the Comb Filter Circuit.
the problem was caused by a Corroded Collector lead on Q502.It had a cap
that I had
already replaced (C502) right next to it.It was one of the original
100uF/16v caps I had replaced.
Anyway,that Leaking Cap had leaked onto Q502 and corroded it's collector
lead...
Peggs
At 07:38 PM 6/24/05, tjanphyl@xxxxxxxxxxxxxxx wrote:
>Did we decide it is visable in the S-Video jack input as well? And
>look at the PIP window.Hows that?
>Phil
>
>----- Original Message -----
>From: Tony S <tcselectronics@xxxxxxxxx>
>Date: Friday, June 24, 2005 9:44 pm
>Subject: [TechAssist] Re: 1990 Hitachi PTV model CU4601
>
> > Check on the CRT boards for leaky 10uf 250v caps for the 200v
> > source. Seen
> > this before after spending hours changing caps on sig and sweep bd.
> >
> > Tony Saracco
> > TCS ELECTRONICS
> > 406 Andra Ct.
> > Gilberts, IL 60136
> > tcselectronics@xxxxxxxxx
> >
> > ----- Original Message -----
> > From: "peggs" <peggs@xxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Thursday, June 16, 2005 5:30 PM
> > Subject: [TechAssist] 1990 Hitachi PTV model CU4601
> >
> >
> > > 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
> > >
> > > -----------------------------------------------------------------
> > ------------
> > > This Email List is Public. Remove: http://www.tech-
> > assist.org/remove.htm> Lost Password: http://www.tech-assist.org
> > and select "Login Problems?".
> > > Appliance Repair List:
> > > http://www.tech-assist.org/secure/tip/chatjoin.htm#app
> > > Email Archives: //www.freelists.org/archives/techassist/
> > >
> >
> >
> > -------------------------------------------------------------------
> > ----------
> > This Email List is Public. Remove: http://www.tech-
> > assist.org/remove.htmSet Vacation
> > mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacationLost
>Password: http://www.tech-assist.org and select "Login Problems?".
> > Email Archives: //www.freelists.org/archives/techassist/
> >
>-----------------------------------------------------------------------------
>This Email List is Public. Remove: http://www.tech-assist.org/remove.htm
>Set Vacation mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
>Lost Password: http://www.tech-assist.org and select "Login Problems?".
>Email Archives: //www.freelists.org/archives/techassist/
-----------------------------------------------------------------------------
This Email List is Public. Remove: http://www.tech-assist.org/remove.htm
Set Vacation mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
Lost Password: http://www.tech-assist.org and select "Login Problems?".
Email Archives: //www.freelists.org/archives/techassist/
Other related posts:
