KPOWERSCIENCE KP3828 Series, Maintenance Manual

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8-26
[03 Paper jam at fuser]
Procedure Points to be checked Remedy Checking Method
1 Is the driving of the
transport belt started
during power
initialization? If YES, go to 2.
If NO, replace the
KMPU board.
2 Is any paper dust or
other debris caught in
PTPS? If NO, go to 3.
If YES, clean
PTPS.
3 Is PTPS normal? If YES, go to 4.
If NO, replace
PTPS after
checking the
harness.
Bring the positive lead of a digital
multimeter in contact with pin 11 of
CN9 of the KMPU board and the
negative lead in contact with SG (pin
12), and check the following 2 points.
Push the PTPS lever down and measure
the voltage. If normal, the voltage will
be approximately 5 V.
Raise the PTPS lever and measure the
voltage. If normal, the voltage will be
approximately 0 V.
4 Is the suction fan
normal? If YES, go to 5.
If NO, follow the
procedure indicated
in the column to
the right.
Check as follows
：
Bring the positive lead of a digital
multimeter in contact with pin 14 of
CN9 of the KMPU board and the
negative lead in contact with SG (pin
12), and measure the voltage.
Is the voltage approximately 24 V in
the print idling state?
If YES, check the next point.
If NO, recheck after resetting and if the
result is still NO, replace the KMPU
board.
Does the voltage become
approximately 1 V at the timing at
which suction fan turns ON in the
power initialization process?
If YES, check the next point.
If NO, replace the KMPU board.
Does suction fan start operating at the
correct timing in the power
initialization process?
If YES, go to 5.
If NO, replace suction fan.