[TechAssist] Re: RCA ProJo PTK169PABS
- From: "Robert Herring" <supertek66@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 21 Nov 2001 09:14:05 -0600
try disconnecting the small white cable that plugs into the hv splitter
board then see if hv comes up and stays
if so you may have a leaky disc cap on that board don't recall location
number but only one on board @820pf 1kv. I have found this twice the last
couple months
Robert
supertek66@xxxxxxxxxxx
robert_herring@xxxxxxxx
H&H Electronics Inc
Dallas,Tx. 75233
----- 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? Thanks for input on this. My customer
would like to have this set back before Thanksgiving. Neil
>
> TV Doctors 108 W. Main St. Monroe,Wa. 98272 360-794-6469
>
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