What about on the capacitors listed previously--are they zeroed out too?
Maybe the voltage is not reaching the bottom board thru the ribbon cable--check the ribbon connection.
i will check if i have a listing of the voltages on each pin of the ribbon cable.
The issue could be on the top board power supplies created from the 12V input power?
Is there anyway to determine which +12V supply is not drawing current? CN101 pin 7 or pin 12, or how much is being drawn on each of those?
Here's some notes i had about the CN1 flat ribbon cable, not double checked:
pins 1-4: Ground, bottom of C841
pins: 16,18,20,31,33,40, 47-50 : Grounds
pins 5-8: +12V nominal, top side of C841
pins 12-13: 5V
pins 22-24: 5V to PC305
pin 25: RLY1 return
pins 26-29: RLY1 5V supply
pins 34-37: 16V nominal
pins 43-46: 5V
Last edited by kiev
on Sun Oct 04, 2020 9:29 am, edited 2 times in total.
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