[TechAssist] Re: : Hitachi HDTV--different problem-PTV---more
- From: "Adolph Gower" <agower@xxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 20 Dec 2003 23:50:54 -0800
Go back over your solder connections, you mat have missed a connection.
Adolph Gower
Cordova TV
10275 Old Placerville Rd. Suite 5
Sacramento, Ca. ZIP 95827
Phone (916) 363-6565
Fax (916) 363-7623
I-mail agower@xxxxxxxxxxxxxxxxxx
Large assortment of used parts
----- Original Message -----
From: "Hugh at Main TV" <maintv@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: 2003Äê12ÔÂ18ÈÕ 21:13
Subject: [TechAssist] : Hitachi HDTV--different problem-PTV---more
> Thanks to all that responded, I must not have been clear -- the
> convergence was bad-now is ok with new chips, second problem is now good
> pix and convergence-but has three large curved lines
> in the top 1/3 of pix.-- these three curved lines are on top of the
> regular picture--one line is red, one blue, and one green! problem is
> in the video, video out from output jack on set is normal-no lines.
> Problem shows up with antenna input video and external video inputs.
> Pix is Ok with input into component jacks with HD signal. I think
> problem is caused in the PIP module as video looks ok going to PIP
> module, but not ok on screen of TV. HD reception does not go through
> the PIP unit so is good. I plan to do the old bypass trick tomorrow of
> the PIP mod. as we do in the older Mitsubishi PTVs. Not sure what to
> bypass so will just try caps from input to output pins on PIP with PIP
> unit removed from set.
> Customer says he never uses the PIP and does not want to pay to get the
> PIP fixed.
> Will post results if/when I figure this out.
> Hugh
> George wrote:
>
> >Did you check the caps in the vertical circuit?
> >
> >George
> >Afana Electronics
> >Moreno Valley, CA
> >
> >----- Original Message -----
> >From: "Hugh at Main TV" <maintv@xxxxxxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>
> >Sent: Thursday, December 18, 2003 2:50 PM
> >Subject: [TechAssist] Hitachi HDTV--different problem-PTV
> >
> >
> >
> >
> >>Have Hitachi HDTV 43FDX01B, came in with bad convergence-replaced both
> >>conv. chips (STK392-110 put in Hitachi chips)
> >>2.2 ohm resistor open on one return line in conv. yoke circuit.
> >>Convergence now looks ok, but now have three seperate red, blue, and
green
> >>curved lines over the pix at the top of raster. Problem shows up in aux.
> >>video input also. Put in new digital convergence module--still same
> >>problem. Nothing found on Hitachi service web site. Set made in 2000.
> >>Nothing on Winstips. Theses 3 colored curved lines are about 8-10 in.
> >>across.
> >>Has anyone seen this problem in Hitachi? Cutomer wants TV back for
> >>Christmas.
> >>
> >>--
> >>Hugh Thornley
> >>Main TV
> >>636 Main St.
> >>Longmont, Colorado 80501
> >>303-776-6955
> >>maintv@xxxxxxxxxxx
> >>
> >>
> >>
> >>
> >>
> >>
>
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>
> --
> Hugh Thornley
> Main TV
> 636 Main St.
> Longmont, Colorado 80501
> 303-776-6955
> 303-776-0792 FAX
>
>
>
>
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