I have a 3 stop Miprom that I can't keep running. It has an upper and lower rack. When it acts up, I've seen the lower rack have some lights flashing and other times it's completely dark. I've changed the Power Supply PCB, lower rack, a leveling sensor and a couple of cards. Pulled all the input cards one by one and the same thing. I've gone through the voltage check procedure the best I can without an extender board.
Voltage readings:
L2B - L1A = 124 VAC
V+ - V- = 27.2 VDC
V+ - L1A = 24.4 VDC
VCC - L1A (14V Regulated output) = 13.8VDC (checked across larger of 2 capacitors right side of backplane)
V11 - VG = 11.3 VDC
VCC - VG = 5.143 VDC (checked at top 2 terminals on a blank card slot in the top rack)
I've not yet checked for AC component. I'm thinking about replacing the top rack. Any ideas?
Last edited by E-man; 05/31/11 10:37 PM.
