[TechAssist] Re: RCA Chassis CTC169BG2 No Power
- From: Ralph Dorsey <Merlin-Wizard@xxxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 13 Nov 2001 22:33:07 -0600
if i'm right, i think cr4118 might cause this problem,,i always change it on
principal anyways,,give it a try
Mike Barnett wrote:
> Hey Guys, Need some help w/ this one. Here's how it goes, Set came in with
> no power and loses color Intermit complaint. looked around and did'nt find
> anything out of the ordinary. I replaced the three caps in chopper
> curcuit(c4102,c4104,c4108) was also missing vcc run voltage at pin 16 of
> u4101, changed it too. re-assembled and set came up. unit was running good
> all voltages seem to be good with the exeption of cr4102 was quite a bit
> low. still had the intermit color. when changing channels it take about 1
> second to have colorand accationally the pic would go to b+w. also then the
> set would shut down losing 200v.. At pin 16 of u4101 still had runvcc v but
> missing3v at cathode of cr4102. even when the set was running the voltage at
> cr4102 is very low/about 1.5v. this is supposed to be 3vdc? The set shut
> down and now will not power up at all. Have 170 @ collector of q4101 and 12v
> at pin 16 of u4101. missng 200v from pin 10 of fly and checked r4703.
> checked pin 16 on ICu1001 for 5.7vdc and is missing, checked Q2906 it was
> good but i changed it anyway with ECG288. Still didn't fix. Have 180v at
> collector of Q4402 and cr4401.
> Changed horizonal retrace cap c4401 and changed c4402 and cr4403.
> CAN ANYONE HELP WITH THIS??? I'm Going outa my mind.
>
> TIA
> Mike Barnett
>
> Get It Fixed At
> Rochester Electronics
> 630 West Ridge Rd.
> Rochester, NY 14615
> 716.663.6870
> www.RochesterElectronicsRepair.com
>
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