[TechAssist] Re: Fw: RCA Proj Model P4677CK Chassis CTC169PA
- From: Gary McCartney <gary@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 30 Aug 2004 17:58:52 -0400
Why not just use an LM324? Very common IC, quad op-amp.
Gary McCartney
McCartney Electronics
Guelph Ontario Canada
Est. 1984
email: gary (at) number63.ca
Larry Poffen wrote:
> I think I found my problem, It is U1903, op amp says LM324N on it. Anyone
> have the RCA Part Number for U1903 for a CTC169PA chassis?
> Larry
>
> Larrys TV Service
> Broken Arrow OK 74011
> phone 918-455-1041
> Fax 918-451-4485
> e-mail lpoffen@xxxxxxx
> ----- Original Message -----
> From: "Larry Poffen" <lpoffen@xxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, August 30, 2004 9:27 AM
> Subject: RCA Proj Model P4677CK Chassis CTC169PA
>
>
>
>>This Proj set is really giving me fits. Came in dead, found pulling P1903
>>Audio plug restored normal operation. I replaced both audio out IC`s, no
>>help. found it still shuts down with both U1901 & U1902 removed. Measured
>>both the + & - voltages at the plug & both are running around 18V. With
>>the ic`s both out I can resolder the pins 2-3 & 6-7 that have been
>>disconnected to get the set to power up 7 set will continue to run with
>>normal voltages on the + & - supplies, but when I shut it off it will not
>>restart. Have checked caps in the circuit & find no problem. What has
>>anyone else found bad in this audio circuit? or any info to narrow down
>>my problem would be appreciated. thanks Larry
>>
>>Larrys TV Service
>>Broken Arrow OK 74011
>>phone 918-455-1041
>>Fax 918-451-4485
>>e-mail lpoffen@xxxxxxx
>
>
>
>
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