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Old 2nd Feb 2020, 3:22 pm   #2
NikPrice
Triode
 
Join Date: Feb 2020
Location: Portsmouth, Hampshire, UK.
Posts: 35
Default Re: Another Quad FM4 problem

OK I've connected the battery neg terminal to the battery pos terminal via a 1R resistor as the specs for the original battery is 0.8R. This has brought REF L down to around 6V, (the specs are 2V for REF L and 8.2V for ref H - 6.2V difference across D24 -6.2V zener).


I'm not sure how to test the zener is in spec, and I'm considering removing the diode and measuring the voltage on the pads. Although I'm not sure what the results will tell me without correct references to go by.
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