Zenith Z1920W

[tvcollector]

I have a 1976 Sanyo set that has deveolped that problem.. The pic gets real bright, and when you turn down the brightness the color looks weird and you see the retrace lines at the top even more.. Looks like it could be too much HV or something..

[rrrhre2s]

Sanyo had a problem with the resistors on the CRT board changing value.

Unsolder one end of the chain and check, on the screen grid of the CRT.

rrrhre2s

[zeno]

My money is on the filter cap for the 200 V feeding the video outs.
It happens to every brand set. Its usually a 4.7 mfd. To find
it go to CRT SKT. There are 3 transistors each with an about 18K ohm
2W resistor feeding the collectors. Where the resistors join is
the 200 V. The cap is off that point sometimes on the CRT SKT or
usually the main board near the FBT. Just follow the wires. There may
also be a coil in series.
Some sets dont have a board at the CRT SKT, everythings on the main PCB.

73 Zeno

Originally Posted by tvcollector

I have a 1976 Sanyo set that has deveolped that problem.. The pic gets real bright, and when you turn down the brightness the color looks weird and you see the retrace lines at the top even more.. Looks like it could be too much HV or something..