[TechAssist] Re: RCA F31671 CTC177CD OSD rolls, need location of C3317
- From: "Webster TV" <webstertv@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 1 Mar 2004 13:11:45 -0600
Leonard,
C3317 is located in the circuit(vert. sync) off of pin 3 of vert. output
IC4501, the trace from pin 3 should hook up to C4505 and also to jumper
JW309, C3317 should be hooked to the other side of JW309. Here's a couple of
other tips for OSD rolling---Replace CR3302(shorted), this diode is in the
same line(vert. sync) as C3317, but located closer to micro. Also check for
open trace from vert. output pin 3 to JW309.
HTH
Dan Webster
Webster's TV
Shullsburg, Wi.
----- Original Message -----
From: "Leonard G. Caillouet" <lcaillo@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, March 01, 2004 11:56 AM
Subject: [TechAssist] RCA F31671 CTC177CD OSD rolls, need location of C3317
> OK, feeling like a real dummy. I have several tips that say to check
c3317
> but I can't find it. Anyone know the location on the board? I'm sure
that
> I am overlooking it, but have been over the whole board a dozen times. I
> only have a partial schematic but I suspect it is near the micro.
>
> I have no vertical at the OSD sync pin 27 on the micro, but there is
> horizontal there. I am suspecting that that indicates that the chip is bad
> but could use a little more info on the circuit.
>
> Thanks.
>
> Leonard G. Caillouet
> Electronics World
> Gainesville, FL
> 352-332-5608
> 352-332-5668 (fax)
>
>
>
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