2NC/2NF/2NG/2NN/3P7/3P8/3P9
1-4-73
4
Transfer roller unit 1. Check if the roller is
bleached on its surface.
2. Check the value of U140
MagDC after conducting cali-
bration.
3. Check if the ground tab of
the transfer roller unit is
deformed.
1. If the connecting terminals are deformed,
correct for a proper conduction.
2. Increase the U140 MagDC value if the
U140 MagDC value has not reached at its
maximum even though the roller is
bleached on its surface.
3. If the MagDC increased to its maximum
won't cure, replace the transfer roller unit.
(see page 1-5-44)
5
High voltage PWB The developing bias and charg-
ing current supplied by the high
voltage PWB is faulty.
Replace the high voltage PWB.
(see page 2-2-18)
6
Main/Engine PWB The main/engine PWB is detec-
tive.
Replace the main/engine PWB.(see page 2-2-
11)
Defective part Check description Corrective Action
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