19" K7000 width problem ***SOLVED***

ecwestjr

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Don't know how to describe this problem. It looks like horizontal fold over.

All of the common bad solder joints have been reflowed with new solder. A new cap kit installed. B+ is at 123.1 volts.

The following parts have either been replaced or are with in tolerance.

IC2, C17, C19, C36, C37, C38, R56, R57, R58, R59, R60, R98, R99, D15, D18 and VR2.

As can be seen in the pictures the right side doesn't fill the screen and the picture appears to squished or possibly folded over.

Any body have a fix or any ideas. Don't believe there are any breaks as I have checked continuity almost everywhere in the horizontal hold and horizontal position circuits.

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Changed width coil and linearity coils with ones from a working chassis and still have same problem. Kinda of expected that it wasn't going to change. Now just parts swapping.

Also this tube and yoke work fine with other 19" K7000 chassis. So it shouldn't be a yoke problem.

No one has any ideas.
 
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I've seen this issue when changing the value of C38 to get more width. Maybe try another C38 or test the existing one to see if its in spec?
 
Had A flaky Q11 (HOT) Removed and measured Each leg pair. Got some really weird readings. Compared to a new one from my stock. Replaced and powered the chassis up.

Chassis is now working.


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Interesting. I've got a K4900 with the same type of curl/width issue. I might have to check the HOT
 
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