Dear All,
I am trying to fix a Tek 577 for some time.
After a LOT of work I think I have been able to fix all major problems of the unit and go through the calibration procedure.
One minor issue I noticed is that it is not possible to adjust the spot to the lower left corner of the screen in the vertical axis.
The major components in this circuit is a trimpot (R570) and R569 (RES,FXO,FILM:l.43M OHM, l% 0.5W,TC=TO).
Checking R569 with a Fluke DMM reads 1.14 Ohms which might explain the problem.
I might try to replace it but I can't understand the TC=T0 specification.
Is T0 a specific value or the resistors are "grouped" by the TC value?
Thanks
