[TechAssist] Re: 1990 Hitachi PTV model CU4601
- From: peggs <peggs@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx, techassist@xxxxxxxxxxxxx
- Date: Fri, 17 Jun 2005 16:14:33 -0700
This set has what's called Comb Gain 1 and Comb Gain 2.......which have
DL501 and DL502 in these circuits.
Problem is,I can't find either in the schematic(CU5000K) I downloaded from
the Hitachi site.
I'm certain my problem(s) are bad caps,but on the other hand,heating and
chilling these caps,brings no
change to the symptom.
Peggs
At 12:15 PM 6/17/05, Phil Bader wrote:
>You just divided the video circuit in half... divide and conquer!
>3-comb video circuit!
>Phil
>
>Philip Bader
>Jan Phyl TV Inc. (estab. 1976)
>3420 Recker Hwy. Winter Haven, Fl. 33880
>Fax (863) 299-8821
>email: tjanphyl@xxxxxxxxxxxxxxx
>
>
>
>peggs wrote:
>
> >S-Video(takes the place of Video 1)
> >IS fine.
> >The RCA Inputs,and the Antenna inputs have the Video 'distortion'.
> >I'm downloading the manual now from HitachiService.
> >
> >Peggs
> >
> >At 07:36 AM 6/17/05, Phil Bader wrote:
> >
> >
> >>Then it does have a 3-comb filter... The S-video in the only input on
> >>that that bypasses the filter circuitry. If clear in S video, you
> >>narrowed it down to most likely the video 3 comb filter.(caps)
> >>Phil
> >>
> >>Philip Bader
> >>Jan Phyl TV Inc. (estab. 1976)
> >>3420 Recker Hwy. Winter Haven, Fl. 33880
> >>Fax (863) 299-8821
> >>email: tjanphyl@xxxxxxxxxxxxxxx
> >>
> >>
> >>
> >>peggs wrote:
> >>
> >>
> >>
> >>>It does.....thanks.......I'll check that input a little later this morning
> >>>
> >>>Peggs
> >>>
> >>>At 02:32 PM 6/16/05, Phil Bader wrote:
> >>>
> >>>
> >>>
> >>>
> >>>>I assume this does not use an S-video input?
> >>>>Phil
> >>>>
> >>>>Philip Bader
> >>>>Jan Phyl TV Inc. (estab. 1976)
> >>>>3420 Recker Hwy. Winter Haven, Fl. 33880
> >>>>Fax (863) 299-8821
> >>>>email: tjanphyl@xxxxxxxxxxxxxxx
> >>>>
> >>>>
> >>>>
> >>>>peggs wrote:
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>>You're talking about the 3 line comb filter.I've done a few of those.
> >>>>>This set is different.
> >>>>>
> >>>>>All the Audio Video even some deflection processing is on the same PCB.
> >>>>>Mounted upright on the left side of the cabinet(from the rear).
> >>>>>
> >>>>>Peggs
> >>>>>
> >>>>>
> >>>>>
> >>>>>At 01:51 PM 6/16/05, BOSS1996@xxxxxxx wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>>Peggs, I just looked at the same set I have here at the store,
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>just repaired
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>>>it for what you describe. I may have the name of the module wrong
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>but it is
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>>>definitely in the set. Take another look.
> >>>>>>
> >>>>>>Bob
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>In a message dated 6/16/2005 4:48:25 PM Eastern Daylight Time,
> >>>>>>peggs@xxxxxxxxxxxxx writes:
> >>>>>>no,this set is much older than the Comb filter sets
> >>>>>>ty
> >>>>>>
> >>>>>>Peggs
> >>>>>>
> >>>>>>At 01:30 PM 6/16/05, BOSS1996@xxxxxxx wrote:
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>>Look for a module soldered to the main board, think it is called a YC
> >>>>>>>separator, is has lots of surface mount caps inside, change them
> >>>>>>>
> >>>>>>>
> >>all for
> >>
> >>
> >>>>>>>convenience since it is hard to service the module in the set.
> >>>>>>>
> >>>>>>>Robert Cardoza
> >>>>>>>Picture Perfect Elec.
> >>>>>>>9940 NW 6th Ct
> >>>>>>>Pembroke Pines, Fla, 33024
> >>>>>>>954-435-5868
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>In a message dated 6/16/2005 4:24:48 PM Eastern Daylight Time,
> >>>>>>>peggs@xxxxxxxxxxxxx writes:
> >>>>>>>
> >>>>>>>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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