Kyocera TASKalfa 6501i Service Manual page 570

Defective part
Drum unit
3
Transfer belt unit
4
High-voltage PWB
5
Engine PWB
6
Check description
1. Conduct U139 to check the
internal temperature.
(see page 1-3-82)
2. Check the value of the U100
main high voltage.
(see page 1-3-69)
3. Check that the ground
terminal is not contaminated
or the conductive grease is
not applied with the
connecting terminals.
4. Check if the charging roller is
dirty.
1. Check if the belt 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 belt unit is
deformed.
The developing bias and charg-
ing current supplied by the high-
voltage PWB is faulty.
Defective the engine PWB
If the internal temperature is 16-degree C or
less, continue printing until the temperature
reaches 16-dgree C or higher.
Fix the inner unit properly.
(see page 1-5-53)
If the connecting terminals are dirty, clean.
If the amount of the grease applied is too
small, apply conductive grease to the bearing
on the receiver side of the drum drive axle.
Replace the drum unit. (Perform U119)
If the charging roller is dirty, clean.Or replace it.
(Perform U930)(see page 1-3-196)
1. If the connecting terminals are deformed,
correct for a proper conduction.
2. If the value obtained by U106 does not
conform to the default value, reset it to the
default.
3. Increase the U140 MagDC value if the
U140 MagDC value has not reached at its
maximum even though the belt is
bleached on its surface.
4. If the MagDC increased to its maximum
won't cure, replace the transfer belt unit.
(see page 1-5-65)
Replace the high-voltage PWB.
(see page 1-5-90)
Replace the enging PWB. (see page 1-5-83)
1-4-210
Corrective Action
2N8/2N7