[TechAssist] Re: ctc169 power supply problem
- From: "Damon" <DamonEB@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 15 Jul 2005 21:35:00 -0500
Fluctuation of the DC voltages may be caused by the 143V (normal) supply cap
being dried out, it's located right next door to the Horiz Heat Sink, and in
front of the SMPS transformer.....if this is a PTV that is.
180uf/200V cap....don't have the part # or reference number handy.
I found this out by monitoring the 143V supply with a scope.....looks like
hash sometimes and other times just a NON -Straight or fluctuating DC
voltage.
It'll make a DC volt meter go nuts.....or it will just look like the voltage
floats all over the place.
Damon B
Telrad Electronics
Fort Wayne IN
----- Original Message -----
From: "pete" <tvtech@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, July 15, 2005 6:48 PM
Subject: [TechAssist] ctc169 power supply problem
> I have been stumpt on this one. 120 volts on horiz output transistor in
standby. cr4118 has been replaced I dont have 15 volts on diode I cannot
measure it fluctuates c4145 1000 micro 50 volts have been also replaced raw
bplus is 160v on the money I have replaced c102,c108.c104 u101, and
disconnected the audio. Any help will be greatly appreciated
> Pete
>
> Perdomo Tv Inc Since 1972
> Miami.Fl
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