[TechAssist] Re: RCA CTC169HA/G35300WK Shuts Down
- From: "miglinasj" <miglinasj@xxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 5 Mar 2002 21:54:57 -0600
I've had C4401 open up and cause shut down.(it can be intermittent).
Regards Jonas
----- Original Message -----
From: "Shoreline Electronics" <jstielau@xxxxxxxx>
To: "Tech Assist Group" <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, March 05, 2002 9:08 PM
Subject: [TechAssist] RCA CTC169HA/G35300WK Shuts Down
>
>
> Make : RCA
> Model : G35300WK
> Chassis : CTC169HA
>
> Original problem was a dead set. Q4101 shorted & U4101 defective. Changed
> both along with the 47uf &2.2 & 15uf caps in the chopper primary. Also
> changed CR4118 out of habit. Reinstalled chassis & set fired up great ..no
> problems. Ran it for a few minutes then turned it off to hookup a cross
> hatch.
>
> That was all she wrote.....now it tries to start...HV comes up for a
second
> then shuts down. It will do this 3 times then quit , pausing about 1
second
> between these 3 self starting attempts. A couple times it even did this
> routine 7 or 8 times in a row. Filaments are lighting up.
>
> 15V supply is at 14 volts or so during startup up...this is good! B+ is
> 143V on the Horiz Output. Flyback pulse is clean is well! What is going
> on here? Flyback pulse measures about 14.5us.......this should be
> fine...no? The X-ray protect pin22 (U1001) goes to 0.22VDC....if I
> disconnect the pin...still shuts down!
>
> 12V & 9V & 5V run supply all come online OK. Sweep derived supplies (-12V
&
> +26 & 200V Kine supply) all OK.
>
> B+ on the Audio outputs(+16V on pin 3 ,-17V pin10) are not being dragged
> down at all!
>
> What am I missing here!!! Help!!!!
>
> Jeff Stielau
> Shoreline Electronics Repair
> 125 Beech Tree Lane
> Westbrook, CT 06498
> 860-399-1861
> 860-664-3535 (fax)
> jstielau@xxxxxxxx
>
>
>
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