[TechAssist] Re: RCA Proj. CTC169PA P52750WK B+ too high/dead
- From: "tvservice" <tvservice@xxxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 27 Nov 2002 14:46:43 -0600
replace hv splitter 205064
Robert
tvservice@xxxxxxxxxxxxxxxxxxx
H & H Electronics Inc
----- Original Message -----
From: "Larry E." <videotech@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, November 27, 2002 1:37 PM
Subject: [TechAssist] RCA Proj. CTC169PA P52750WK B+ too high/dead
>
> Hi guys, have a lightbox for a CTC169PA projection set that seems to
> not be regulating correctly. Raw B+ is 159v, pin 16 of U4101 is 11.5v,
> Cr4118`s cathode is 14.85v, but cathode of cr4116 is 155v, if I hold
> down the power button this voltage drops to 80 volts and something in
> the power supply tics, I`ve replaced, C4102,104,108, Cr4118 & C4145,
> checked across CR4123 and have 5.6 volts, Regulated B+ was 167v before
> replacing C4102,104 & 108. My tech notes say this problem is caused by
> either C4102 or CR4123 is zenering at 8.6v instead of 5.6v. Obviously
> this isn`t the problem, any ideas ??? tia, Larry E
> --
> Larry Eastman
> American TV & Electronics
> Crystal River, Fl.
> http://www.tvjunkyard.com
>
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