[TechAssist] Re: rca ctc175a/model f20301sf no osd
- From: "GARY AND JUANITA CHAMBERS" <gchambe3@xxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 15 Feb 2002 23:56:12 -0500
jeff, this was posted earlier:
Fixed! Thanks to Jerry's reply.
was a bad connection off pin 24 of micro.
no horiz sync for osd.
THANKS JERRY!
Gary,
CHAMBERS TV
BRADENTON,FL
SINCE 1982
----- Original Message -----
From: Jeff Dougherty <jeff@xxxxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, February 15, 2002 11:27 PM
Subject: [TechAssist] Re: rca ctc175a/model f20301sf no osd
>
> Gary,
> Here's what I have for no OSD:
> Cr4104
>
> Hairline Crack In Trace Between R2733 And T-Chip. This Pin Selects The Osd
> Thru The Matrix Inside The T-Chip...
> Jeff
>
> FAX 717-564-4952
> Jeff Dougherty
> Intrepid Video & Electronics
> 501 Luther Rd
> Harrisburg, PA 17111
> 717-909-8844
> VCR tips, electronics info & general interest.
> www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
>
>
> ----- Original Message -----
> From: "GARY AND JUANITA CHAMBERS" <gchambe3@xxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, February 14, 2002 6:14 PM
> Subject: [TechAssist] rca ctc175a/model f20301sf no osd
>
>
> > Hi all, this set has no osd at all. Customer complained of intermittant
> power,snow etc....
> > Did the usual tuner soldering and also soldered the shielding around the
> micro.
> > Replaced the eprom as well.Set still has no osd.
> > Checked pins 17,18,19 on micro(osd out) for any signal,has none.
> > toggled pin 39 on tchip(fast switch line) 5v and 0v, no osd showed up.
> > Sure looks like a bad micro, but before I order it, has anyone had this
> before?
> > pins on tchip 40,41,42 are at 5.5v(osd in) which seems normal.
> > Anyone know if it could be something other than the micro?
> > Thanks in advance for any ideas,
> > Gary
> > CHAMBERS TV
> > BRADENTON,FL
> > SINCE 1982
> >
> >
> >
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