Still working on this R7903 repair, still at this point concentrated on the PS. The PS is no longer in tic mode- yea!
The service manual says to adjust TP1625 for +55 volts plus-or-minus 25 volts. What exactly does that mean? I've never seen such a wide range given for a single adjustment. Does it mean that any voltage between 20-80 volts is OK? Is it implying that once you adjust it to 55 volts that you can expect it to vary between 20-80 depending on temperature/load? Or maybe that if all other voltages are correct then you can leave it at any voltage between 20-80? Or?
I'm finding (so far) that adusting it to 55 when cold, it then proceeds to slowly decrease (as low as 30 volts) as it warms up. After warming up for an hour and re-adjusting it to 55 it still fluctuates slightly. Though -50V TP is steady. Since I am (evidently) not finished replacing caps I expect to revisit this adjustment several times...
BTW- thank you David (once again) for your explanation last post. I am still replacing caps! and still no crt (yet).
Except for last week during which I was waiting for parts I have been working on this project several hours a day 5/days/wk for about 3 months! Thanks to everyone for their help!
Keith Ostertag
