[TechAssist] Re: RCA Projection PTK169PCB Model NA
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 26 Jul 2002 08:19:54 -0400
Larry,
Try changing C4145 anyway. I ALWAYS do when replacing CR4118. I have seen so
many problems with both of them. Then let's see what happens.
Bob Waterman, CET® #RI-28
Master Technician License # 9109
Service Manager
Gemini Computer, TV, & Security Alarm Systems, Inc.
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxxxxxxx
geminitv@xxxxxxx
----- Original Message -----
From: "al m" <ampm@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, July 26, 2002 8:05 AM
Subject: [TechAssist] Re: RCA Projection PTK169PCB Model NA
>
> Larry that 15V line feeds the 12Vrun ,9vrun,And 5v standby circuits.check
> your standby transistor Q4601 for 5V on collector..I think 13V is ok on
the
> 15V line in standby.sounds like you have no 5v standby to processor.
> al marquardt
> ampm@xxxxxxx
>
>
> ----- Original Message -----
> From: "Larry E." <videotech@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, July 25, 2002 5:26 PM
> Subject: [TechAssist] RCA Projection PTK169PCB Model NA
>
>
> >
> > Hi guys, working on a PTK169PCB (don`t have model # just lightbox) set
> > was dead, regulated B+ was 204 volts replaced C4102 and B+ is now
> > 141volts. Set will still not start because 15 v line is only 13.2 volts,
> > no relay clicks, no ticking, replaced CR4118 with oem, pulled C4145 it
> > esr`s good no leakage.I pulled jumper wire jw324 and 15 v line goes to
> > 16.3, I replaced it and pulled jw320 and I get 13.9 volts so obviously
> > 15v A&C lines are ok, the 15v B line is the problem. I`ve been pulling
> > my hair out for 3 hours trying to find the short on this line, has
> > anybody been down this path before?? Thanks in advance,
> > Larry Eastman
> > American TV & Electronics
> > Crystal River, Fl.
> >
> >
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