[TechAssist] Re: 1990 Hitachi PTV model CU4601
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 17 Jun 2005 17:52:20 -0400
I downloaded it,too.
DL501 and 2 is on pg. 17 of your manual near top left quadrant. At top
the page is labeled "Signal Circuit Diagram (2/2)"
See them? In the area are lytics:
C505(10/16v),C501(47/16),C502(100/16),C521(100/16v) for starters.
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:
>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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