[TechAssist] Re: CTC167CN - Retrace Lines/Bleeding Picture
- From: "tvservice" <tvservice@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 15 Dec 2004 14:33:04 -0600
sounds like the B+ cap for the +200 volt to video outputs is bad.
Should be @ 33 mfd 250-350 volt cap.
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc
----- Original Message -----
From: "David" <mr_fixit@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, November 05, 2004 1:51 PM
Subject: [TechAssist] Re: CTC167CN - Retrace Lines/Bleeding Picture
> Follow-up:
>
> I replaced luminance buffer...no change in picture. Measured CRT drive
> transistor levels and they are low (130-140VDC), I thought I made good
> measurement the first time! There's only 150VDC feeding up from the
> flyback secondary. I'll check the diode and cap in this circuit next.
>
> David Lessard
> Alexandria, Ontario
> mr_fixit@xxxxxxxxxxxx
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of David
> Sent: Friday, November 05, 2004 1:25 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] CTC167CN - Retrace Lines/Bleeding Picture
>
> Merry Christmas Techs,
> =20
> I have this CTC167CN that was given to me, I would like to fix it for my
> son=92s room if possible. Picture has retrace lines and is a bit on the
> bright side with bleeding to the right of images (like too much drive
> level). When I turn down the G2 (screen) there are dark patches. All the
> CRT drive transistors have normal voltage and signal levels. Is this the
> tube or something else? I think I read something at one time regarding
> the luminance buffer causing a similar symptom. Could anyone confirm
> this and which transistor is the luminance buffer?
> =20
> Thanks,
> =20
> David Lessard
> Alexandria, Ontario
> mr_fixit@xxxxxxxxxxxx
> =20
>
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