[TechAssist] Re: LA7672 'fixed'
- From: peggs <peggs@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx, techassist@xxxxxxxxxxxxx
- Date: Thu, 16 Oct 2003 15:07:30 -0700
I ordered and installed the OEM 4835 2098 8005(Tritronics $30),guess what
Dim/Dark Picture.
after about a $30 call to Tech Support,I found bad Q650 and Q651,both
435-3 or NTE123AP(pin-out different).
These must amplify Luma out of IC200 LA7672
Peggs
At 02:42 PM 10/9/03, peggs wrote:
>Are these chips Proprietary ???
>
>I've got a 35" Philips,35P550c101 with a bad IC200
>LA7672 4835 2098 8005(part# from winstips)
>OSD Goes Green after Warm-up,customer complaint of Picture
>going Green after Warm-up.Chilling this chip instantly returns
>a good picture.
>
>I robbed an LA7672 out of a known good Zenith Chassis(bad pix tube)
>but the pix is very dim with this chip installed.
>
>Re-installed the original chip and picture is back, but OSD has already gone
>Green again.
>
>Both of these chps look the same except for the 4 'character' markings are
>a little
>different.
>I've got another LA7672 to try,looks different than the first 2,but if the
>OEM is proprietary..............
>
>Maybe Some Alignment needed when the OEM LA7672 is replaced ???
>
>Peggs
>Peggs' Electronics
>1519 West 2nd Street
>Owensboro,KY 42301
>270-926-4968
>fax 270-686-7399
>peggs@xxxxxxxxxxxxx
>
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