[TechAssist] Re: RCA PTK 169 PCB Model NA , Still Dead
- From: "Larry E." <videotech@xxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 29 Jul 2002 14:13:16 -0400
Found it! the winding on pin four of T4301(Horiz. driver transformer)
had broken at the solder connection where it attatches to pin 4 of T4301
which of course took away the B+ for the horizontal driver transistor
Q4302, I now have a running set with an arcing Red anode lead, isn`t TV
work fun ! Thanks to all who sent help, I do appreciate it.
Larry E.
American TV & Electronics
Crystal River, Fl.
Larry E. wrote:
>Hi guys, still need help on this PTK169 PCB, Thanks for all the ideas
>given so far. I have replaced C4145, pulled the anode from the splitter,
>shorting the collector of Q4304 does not force the set on, still
>nothing, no ticking, no clicks, no attempt from High Voltage to come
>up.In standby,
>Switch mode is operating, regulated B+ is 146.6, CR4118`s cathode is
>13.3, CR4117`s cathode
>is 7.2, CR4119`s cathode is 24.9 volts. standby 5 volts is good and is
>at pin 19 of the micro. It
> is definitely baffling the heck out of me as to why the set won`t run,
>I`ve never had to replace a
>U3101 or U1001 in a 169 chassis but maby the problem lies with one of
>them? Any help is
>definitely appreciated !!
>
>Larry Eastman
>American TV & Electronics
>Crystal River, Fl.
>
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