I think that is actually a bug in the hardware design. When I purchased my 271 it was described as faulty - resets every few minutes ...
Wonder how many people it gave fits to?
I want to remove the grungy old foam around the fan. That old foam gets really mushy. It's in the garage now with the third coat of Goo Gone on the foam. It's really a bear to remove this one.
Getting close to calibration, and the tweaking of many pots.
As stated earlier, I have the
manual for the Model 278. There are 3 boards in the 271 and 278 (the other models may have that many also). Two of the boards are the same - Microprocessor/PSU and Function Generator. The 278's 3rd board is called a "Synthesizer". The 271's 3rd board has to to with generating bursts, widths, and delays, and has more trim pots than the 278's third board board. Maybe the Model 278 3rd board "Synthesizer" does the same thing but differently, I don't know. The 278 "Synthesizer" board has only two adjustments, so maybe it does it more in software.
I was worried I couldn't do the procedure on the 3rd board since the manual doesn't show my board in the cal procedure list, but I realized that the internal cal process (which you can recall starting from memory 1001) is very nice and might state what pot I need to adjust if I went past the last common cal routine for both units (RCL 1028). Sure enough, it does keep going, and by stepping up one memory at a time, the display tells me which pot to adjust for the 3rd board, and what the delay and PW should be. Cool!
Another interesting thing, is that on that 3rd board, the pots have a green line of tamper proof material, which as far as I can tell, has never been cracked or touched. I guess that means it has never been cal'ed, but then, why don't the pots of the Function Generator board have any tamper proof agent on them? Any ideas?