Several CTC111 files here: 1.Excess brightness/ retrace lines. Open C120 (33mfd@250V) located front of flyback. 2. May come on bright, bloomed raster, retrace, may shut down. Shorted spark gap assy on CRT board. Remove as test. Part# 146169 3. Comes on with bright picture. Usually bad Q703 "brightness ref transistor" # 3474, use NTE159. (U700 luma IC can cause also) 4. Hum, or bands in picture. Weak main filter cap C105 (800mfd) mounted at side. #150728. But: I'm leaning to a weak CRT that may have a partial short, and the extra current during bright scenes is pushing it over. I've seen the Zeniths do this with a focus grid short in the CRT. Phil Bader John & Sharon Mikowich wrote: >Make: RCA >Chassis: CTC111B > >Hi Everyone; > > Got this one in the shop that when you turn the contrast & >brightness to max. you get a white band in the picture that is flashing >or jumping rapidly. If you turn the brightness or contrast down this >will go away until you get a scene with a lot of white in & it will >happen again. I have seen this on these chassis before, but i can't >remember what causes this, it's been a long while. Check the usual caps, >v measurements on the outputs can't seen anything out of the ordinary. >Any help with this would be appreciated ! > >Thank You in Advance; > >John Mikowich >East Side Tv. > > > >----------------------------------------------------------------------------- >Lost Password: >http://www.tech-assist.org and select "Login Problems?". >Email Archives: >//www.freelists.org/archives/techassist/ > > > -- Philip Bader Jan Phyl TV Inc. (estab. 1976) 3420 Recker Hwy. Winter Haven, Fl. 33880 Fax (863) 299-8821 email: tjanphyl@xxxxxxxxxxxxxxx ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/