Wells K7500 Pincusion and Trap adjustment problem

[jconstanza]

I cannot adjust my pincusion or trapezoid. I have changed the caps that are on the small board that is mounted on the vertically on the chassis. Any other ideas?

[qrz]

check q710 , d708/c724 on main pcb

qrz

[Memories_Games]

I second checking q710!

On the monitor I fixed last night something happened today.

I'm walking through the arcade and the game suddenly has a horribly shrunken horizontal size and squeeze.  Bad hourglass shape.

I grab the remote board and the horizontal size pot does NOTHING.

I grabbed a flaslhight and had a look around the chassis and found a likely cause.  I either forgot to reconnect q710 after bolting it to its heatsink or the plug slipped off .  I plugged it back in and powered the game back up and it was back to as normal as it was before.

The original location for the transistor was on the same heatsink as the HOT, but it was moved to a new heatsink at the back of the frame and wired in remotely with about a 10" cord.

Fair chance yours is disconnected.

-eric