Sony KV-9200 Uneven Raster

[vol.2]

Originally Posted by zeno

Look off the negative, it goes to the #1 130 V source. There is usually another cap to GND from the 150.. Probably on the PS part of the schematic.

I'm assuming you mean C522? It's been replaced. I replaced all the lytics. Almost every single one was way out or very high ESR or both.

[zeno]

C521 common on old Sonys. Same hourglass symptom. C-1 is in // with it
but not on all. Probably hung on the etch side of the PCB.
C522 is the "other" cap for shading, jail bars etc.
Good Luck
Zeno

[vol.2]

Originally Posted by zeno

C521 common on old Sonys. Same hourglass symptom. C-1 is in // with it
but not on all. Probably hung on the etch side of the PCB.
C522 is the "other" cap for shading, jail bars etc.
Good Luck
Zeno

So, I think I figured it out. Q511 seems to be pulling down the 130V on the other side of the flyback winding. I measured the flyback and the windings are spot-on, so I think it's okay.

Going to pull Q511 and see what the fuzz is.

Ok. No. this didn't really change anything for whatever reason.

The transistor was ok, but there was a ceramic disc cap that had gone high ESR across a diode on the other side of the collector. Replacing the disc cap brought back my 130V at the collector, but it didn't seem to make much difference.

Also of note is that the VSIZE and HSIZE pots are close to the end of their travel.