[JohnCT]

OK, I remember that model. The 9-89 kine board was eliminated and replaced with the CRT socket board. That one has those thick film ceramic IC on them.

Somewhere on that board is the source voltage for the kine outputs, typically 200VDC give or take 25V. That source is bypassed by a fairly low value electrolytic (10-22uf typical) at a higher voltage, like 250V.

If that cap is bad, the voltage will be low which will force to tube to conduct higher and give you excessive brightness and retrace. The cap will be located in the chassis but if you can identify the source point on the CRT socket, you can follow the wire back to the cap on the chassis. A SM will also be helpful. The only CCII schematics I have left are the F models and earlier which won't be of much help.

There is a G2 adjustment somewhere on that board, could be the yellow pot. Mark the pots with a Sharpie and turn them all counterclockwise one by one to see if maybe someone turned the G2 control up.

Also tap lightly on that board to see if it's shock sensitive. Those ceramic ICs run very hot and the solder can deteriorate on the foil side of the board, but they can also fail where the IC pins are soldered to the printed ceramic substrate.

With regards to the switch on the chroma board, in test position it floats the chroma osc so you can adjust R1018 control until the color bars are at their widest/most stable, then move the switch to normal to lock osc. Those switches get dirty so cleaning it with contact cleaner wouldn't hurt. You may not see any difference right now because your CRT is swamped.

John

EDIT: Although I tossed my Zenith manuals, I actually have the SAMS for it.. There is a 251V source going into the CRT socket module that you can measure across C1208 - a .01 disc cap near the jumper plug. From the chassis ground, check both sides of that cap. One side should have 251V and the other side zero (ground). If it's low, you can tap a 10uf at 250V cap temporarily across it (observe polarity) and see if the voltage rises.

The kine bypass filter cap is CX228, a 10uf/350 and is an axial cap located on the bottom fixed section of the chassis, not the upper swing section. Swing the chassis down and the cap is on the bottom fixed section near the plug-in rectifier board.

Careful when adjusting the yellow G2 pot - it's got 788V on one side of it, so use an insulated screwdriver or hex tool to adjust it, or just turn the TV off and rotate it to mid point to start.