[TechAssist] Re: CTC169 vertical
- From: "Terry H." <tvdoc@xxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 23 Dec 2003 08:48:44 -0600
Peter, I've had it twice. Had an open winding for pins 2 and 3 of the fly
which feed the vertical circuit, pin 3 thru the horiz. drive transformer. I
think pin 2 should have 300vpp and pin 3 125vpp. Not that common but could
have an intermittent on that winding.
Terry H.
The TV Shop
Gonzales, Tx
----- Original Message -----
From: <tvservice@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, December 23, 2003 8:45 AM
Subject: [TechAssist] Re: CTC169 vertical
> Never replaced flyback on 169 for vertical
> have seen 2 small caps give intermittent vertical collapse or compressed
> change C4518 and C4519 both .33mfd polyester caps in series at base Q4506.
> Also had cracked surface mount cap once C4521 8200pf at U4501 pin 3.
> hth
> Robert
> tvservice@xxxxxxxxxxxxx
> H & H Electronics Inc
> Dallas, TX
>
>
> ----- Original Message -----
> From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, December 22, 2003 11:15 PM
> Subject: [TechAssist] CTC169 vertical
>
>
> >
> >
> > Have several CTC169 sets with intermittant vertical problems,
> > (intermittant fluttering/colapse) Have checked the capactiors and
> > connections following schematic no effect get worse when warm- tap
> sensitive
> > in generalized way. Can desensitize (at least as a temporay test
measure)
> by
> > placing shims under board to deflect board upward. since hese sets use a
> > moldulated flyback drive to run the vertilcal. I have seen several tips
on
> > vertical problems to replace the flyback. Any one have any historys on
how
> > often it is necessary to replace the flyback in ctc 169's to cure a
> vertical
> > problem...
> >
> > Peter Oliver
> > Tucson Radio TV
> >
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