Konica Minolta DF-502, Service Manual, Page: 44 / 52

7. Introduction Field Service Ver. 1.0 Apr. 2005
22
DF-502
T
roubleshooting
7.1.2 Switch
7.1.3 Solenoid
7.1.4 Clutch
Step Check Result Action
1
Does the input signal (NO) of the control board change from L
to H when the switch is activated?
NO Replace the switch.
YES
Replace the control
board.
4025T523AB
Not Use
COM
NO
Step Check Result Action
1
Does the output signal of the control board change from H to L
when the solenoid is activated?
NO
Replace the control
board.
YES Replace the solenoid.
4025T522AA
1
2
2
1 2
1
Step Check Result Action
1
Does the output signal of the control board change from H to L
when the clutch is activated?
NO
Replace the control
board.
YES Replace the clutch.
4025T528AA
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