GE 821 Horizontal Linearity and Fold Over

[Crist Rigott]

I've been asked to help troubleshoot this problem. I've been assured that every component has been replaced and replaced correctly in the chassis. I'm including a video of what he sent me. The picture has terrible H. Linearity and a H. fold over at about 1/3 of the way from the left hand side.

I asked for voltages and this was what I was given:

Voltages Taken On Tubes V16 and V17 and their SAMS Target Voltages

V16 is Tube 12SN7GT

Pin1 / -9.3 VDC. Should be -1 VDC
Pin2 / 150 VDC. Should be 105 VDC
Pin3 / -0 VDC. Should be -0 VDC
Pin4 / -39 VDC. Should be -25 VDC
Pin5 / 171 VDC. Should be 245 VDC
Pin6 / 0 VDC. Should be .2 VDC
Pin7 / 75 VAC. Should be 85 VAC
Pin8 / 64.6 VAC. Should be 70 VAC

V17 is Tube 19BG6G

Pin1 / -21.6 VDC. Should be -45 VDC
Pin2 / -96.6 VAC. Should be -105 VAC
Pin3 / - 0 VDC. Should be 0 VDC
Pin4 / - 0 VDC. Should be 0 VDC
Pin5 / -22.5 80VP-P. Should be -45 VDC
Pin6 / 270 VDC. Should be 240 VDC
Pin7 / 77 VAC. Should be 85 VAC
Pin8 / 266 VDC. Should be 240 VDC

I was told that the chassis pretty much was good according to the resistance chart.

Here is a link to the video:

https://youtu.be/Idomo6g5fV8