[TechAssist] Re: Fw: RCA CTC169 regulator theory questions
- From: "Larry E." <videotech@xxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 06 Apr 2004 18:13:05 -0400
Al, No it won`t go to "run" mode without a Horizontal pulse being sent to the
run
regulator circuits
which in turn drives T4101 which drives pin 2 of U4101. There is a procedure to
check which
circuit (power supply or Horizontal) is defective, it`s a little lengthy and you
have to have a DC
power supply capable of 15 volts @ a minimum of 1/3 amp and a variac, if you
want
you
can email me direct and I`ll give it to you, Larry E
Larry Eastman
American TV & Electronics
Crystal River, Fl.
www.tvjunkyard.com
Al L wrote:
> Subject: RCA CTC169 regulator theory questions
>
> > CTC169 direct view
> > SURGE!
> >
> > Got it to fire up and shut down,lotsa parts,originally had a vertical
> stripe
> > about and inch wide if you ran it for a while. When I sub a 60 watt bulb
> > for the horizontal load,light barely lights and pulses.
> >
> > QUESTION: Will this reg work without a horizontal reference?I think the
> > pulse generator provides a reference,the 140 volt line is sampled by the
> > error amp,and the beam sense transistor shuts it down if the beam current
> is
> > heavy.Therefore I think the reg is at fault,since it will not light the 60
> > watt bulb. Any ideas? al
> >
> > Al Leatherman
> > 224 RT. 46
> > Mine Hill, NJ 07803
> > 973-361-5796
> > WWW.ALS-TV.NET
> >
> >
> >
>
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