[TechAssist] Re: RCA ProJo PTK169PABS
- From: wpt19@xxxxxxxxx (WPT19. P)
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 26 Nov 2001 02:36:01 -0500 (EST)
I fixed one with the same problem, and it was the run control under the
black plastic cover, (they said do not adjust), but you have to remove
it, mark the position, and clean it with wd40. hope this help.
pete
... Original Message...
Sender: techassist-bounce@xxxxxxxxxxxxx From: tvdoctors@xxxxxxxxxxxxx
Date: Tue, Nov 20, 2001, 9:58pm (EST-3) To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: RCA ProJo PTK169PABS Reply=A0to:
techassist@xxxxxxxxxxxxx
It won't run. It tries to start but just shuts down. Standby voltages
seen normal until I hit the power button. As I measure standby voltages
when I turn the set on, they drop about half. =A0 Neil
** Original Subject: [TechAssist] Re: RCA ProJo PTK169PABS ** Original
Sender: Dennis Viereck <wa6ati@xxxxxxxxxxxxxx> ** Original Date: Wed, 21
Nov 2001 00:37:05 -0500 (EST)
** Original Message follows...
Neil:
Is the voltage you are measuring in the Standby mode or in the Run mode?
If so, What are the voltages at CR4106(K) & CR4101(K) with respect to
hot ground in the Standby mode? Are any of the supply voltages pulsing
at a 0.5 to 1 second rate at U4101(15 & 16)
Dennis Viereck
tvdoctors@xxxxxxxxxxxxx wrote:
Didn't help! =A0 130 goes to around 70. =A0 12.6 goes to around 6.5 =A0
_15 and positive 15 don't seem to go as low. =A0 Anything else to try. I
do get a spark like from a spark plug wire from the anode for about a
second when power button is hit. =A0 Neil
** Original Subject: [TechAssist] Re: RCA ProJo PTK169PABS ** Original
Sender: "Ron Miller" <rlmbkm@xxxxxxxx> ** Original Date: Tue, 20 Nov
2001 18:32:32 -0500 (EST)
** Original Message follows...
B+ should be 143.5vdc change two caps to the left of U4101 a 2.2uf@100v
and a 15uf @ 63v.,also check C4108 in base circuit of chopper. Ron
Miller
D.T.V. Texas
----- Original Message -----From: <tvdoctors@xxxxxxxxxxxxx> To:
<techassist@xxxxxxxxxxxxx> Sent: Tuesday, November 20, 2001 5:03 PM
Subject: [TechAssist] RCA ProJo PTK169PABS
OK here's the deal: I brought this projector module into my shop and
found R767U open and R763U to be discolored. I replaced these with the
high voltage splitter and checked other surrounding components. Set
still won't activate. My B+ is 130 volts and all other secondary
voltages are right on the track. I have a good pulse to the base of the
horiz.. Output transistor. When I push the power button, I notice that
the 130 volts gets loaded down to around 70 volts. If I disconnect the
anode lead from the splitter and clip a lead from about a tenth of an
inch from the lead to ground, it makes a spark once then shuts down, so
I know my high voltage is trying to come up, but shuts down. I've
checked the caps in the horiz.output collector circuit and they check
good. The only thing I can find out of place is my 130 volt line is
dropping down. Has anyone had a problem like this in the past? Could it
be the flyback? =A0 Thanks for input on this. My customer would like to
have this set back before Thanksgiving. =A0 Neil
TV Doctors =A0 108 W. Main St. Monroe,Wa. 98272 =A0 360-794-6469
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Good luck,
pete
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