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RCA atc113aa

 
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Frank
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PostPosted: Sun Jan 07, 2007 9:39 pm    Post subject: RCA atc113aa Reply with quote

Hi Guys, It.s me again with the RCA ATC113AA Has been giving a Headache.
I started with dim picture i resolder everthing no avail. then turned up g2 have enough bright but get bad poor covergency on greens. when i turn down the G2 to the rihgt level where i can get a good pic and convergence,then when turn off set then turn back up again the pic is dim or without bright,i have to keep the G2 a litle bit higher thus degrades the green convergence,I don't have sckematic, i suspect either FLY or IC TDA6107G Video Amp, any ideas thanks in advance.
Took measurements of the IC Drivers Amp TDA6107G ,


Unplugged the CRT board from the neck of the tube, turned on set. This were the measurements Pin #1=1.6v,2=1.5v,3=1.5,4=0.00,
5=5.00v,6=193v,7=160v,8=160v,9=154v,

I plugged in the CRT board in the neck of the tube, turned on set. P#1=1.9v,2=2.3v,3=1.7v,4=0.00v,5=5.00v,6=192v,7=150v,8=119v,
9=139v,all this was taken from the hit sink G. and with no RF connection


also Measured G2 on the crt board while i was turning up and down the g2 control, minimum control 151v,maximum 380v
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minnie



Joined: 18 Aug 2005
Posts: 2877
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PostPosted: Sun Jan 07, 2007 9:49 pm    Post subject: Reply with quote

Sounds like you may be fighting a bad crt.
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Frank
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PostPosted: Sun Jan 07, 2007 10:17 pm    Post subject: Reply with quote

Minnie you talking about the tube itself or ctrt board?
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minnie



Joined: 18 Aug 2005
Posts: 2877
Location: Hell

PostPosted: Sun Jan 07, 2007 11:01 pm    Post subject: Reply with quote

The tube. G2 sounds ok. Stick a hv probe under the cap of the flyback and see what your voltage is. If it's around 20k,,, I'd suspect a bad picture tube.
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Frank
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PostPosted: Mon Jan 08, 2007 12:12 am    Post subject: Reply with quote

I don't have a HV Prove. so i'll wait for one other tv with the same tube to show up so i can test this chassis in it .
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