cro328 wrote: ↑
01 Aug 2019, 05:47
When it turns on, it is always at the last frequency I used.
Well, it's not the memory capacitor (1000uF 6.3V) on the CPU board then.
It's not likely to be any of the capacitors on the main board, although it you replace the 10V ones for the same capacity but a higher voltage, and you do it correctly, you will almost certainly save yourself problems in the future.
I would start with replacing C392 on the CPU board, as it is part of the reset circuit. C394 is another possible.
If your description of the fault is wrong, and it does Tx and Rx before the display comes up, replace C501 and C503 on the display PCB, and you might as well do C502 as well while you're there. I've had problems with them before, with display not coming up, but from the schematic I can't see how that happened.
Alternatively, send it to Black Spirit (Nick) and he'll sort it out for you.
"To this day the words Stirling bridge conjour pride in every Scotsman's heart, while to an Englishman those same words conjour literally no feelings at all." - Cunk on Britain S1 E1
Gorgon Brown - a man with all the joie de vivre of a haunted cave in Poland. S1 E3