Minolta EP1080 Service Manual page 295

Symptom Step
Power is not
1
supplied to the
copier at all.
2
3
4
Only the control
5
panel Indicators
light up.
RY1 is not
energized.
6
7
8
*
If the problem persists even after the above procedures, the harness is probably short-circuited.
Check the harnesses.
Check Item
Is the voltage across PJ1-1
and 3 of PU2 AC100V?
Is the voltage across PJ3-1
of PU2 and GND, and
across PJ3-3 on PU2 and
GND, DC24V?
Is the voltage across
PJ1C-3 on PWB-C and
GND, and across PJ1C-5
on PWB-C and GND,
DC24V?
Is LD1 on PWB-A lit up?
Is the voltage across
PJ1C-3 on PWB-C and
GND DC24V?
Is the voltage across
PJ1A-14 on PWB-A and
GND, and across PJ1A-15
on PWB-A and GND, near
DC0V?
Is the voltage across
PJ1C-2 on PWB-C and
GND DC24V after the
Power Switch has been
turned ON?
Is the voltage across
PJ1C-1 on PWB-C and
GND DC0V after the Power
Switch has been turned
ON?
T-63
Result Action
Check F1 or line voltage.
NO
Check F1 of PU2 or replace
PU2.
NO
Check S1 and S21.
NO
Check F1 of PWB-C or
NO
replace PWB-C.
Check S21.
NO
Replace PWB-A.
NO
Replace PWB-C.
NO
Check RY1.
NO