rca atc113

[sampson159]

hey all!i got a rca f27450 atc113 chassis.set had a repair last winter(hot,flyback,and regulator)worked very well until yesterday.vertical collapse with the bottom 30% visible.any place to start?looks like a cap.any help is greatly appreciated.

[radiotvnut]

It's probably caps, a bad vertical IC, or both.

[Zenith26kc20]

Last one I had was just bad solder joints on the IC. These sets use "no lead" solder which causes lots of problems!

[mbates14]

i just did a fly/hot replacement on one, but it stuck with me with a super bright raster with retrace, picture almost washed out. any ideas? G2 drive doesnt do too much.

[radiotvnut]

Check the G2 voltage from the flyback and make sure it varies as you adjust the control. If it does not, you have a bad flyback or you might have possibly forgot to solder the G2/focus ground lug on the underside of the flyback to the PC board.

If that checks out, measure the B+ voltage to the video output stages. It should probably be at least 200 V. If not, suspect an open resistor or a bad cap in the B+ line.

[mbates14]

what kind of voltages am i looking for when i measure the G2 line? reason i ask is i dont have an HV probe. just a basic multimeter. but i know when i turn the G2 pot, it washes the retrace lines AND picture out way too far and i have to turn the pot all the way back to the left before the picture pops back in, but too bright with retrace, however i DO have a picture and is readable.