[TechAssist] Re: Zenith60" PVY6067DT had fading filament voltage(fixed) now black,vert protect...
- From: Philip Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 19 Dec 2003 13:25:22 -0500
forgot to mention this set also uses a 9-1713 main(tuner) board next to
it with at least 4-5 upright shielded modules on it (tuning,pip,etc). So
IF the 9-1674 board is OK what else has the ability to kill vert?
Phil
Philip Bader wrote:
>
> OK. We installed originally an OEM Zenith HV splitter block.Customer
> picked it up at shop. Ran a month then Customer said after on awhile the
> picture faded to black.In shop, while on I pushed down on the
> power/deflection 9-1674. I saw the picture slowely fade in again. The
> CRT filament voltage was intermittant. Simple enough...
> No...
> We carefully removed the 9-1674 and benched it. Indeed, many cracked
> solder connections as well as at the top edge of the upright daughter
> board on it,where a plug goes at "3B5".
> My tech is very careful and detailed in his work especially doing small
> SMD flat packs,etc. He reflowed the board. Installed it again and the HV
> and filament came up and ran OK.
> But...
> Black screen. SLOWELY advancing one G2 revealed a line: No vertical
> deflection, so the set blanks out the video as a safety feature.
> We pulled that board 4 times. went over it under hi magnification. It
> looks like a clean job. He even replaced the LA7838 vert IC just to see.
> Every wire seems in place. This is becomming a nightmare.
> Now I'm not positive the lack of video,hence no vertical is a problem on
> this 9-1674 board. Please assist! X-mas approaches. Deadlines...
> I don't want a new -1674 board and find out it's elsewhere.
> I need you guys!
> Thanks in advance,
> Phil Bader
> --
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
>
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--
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx
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