Kyocera FS-6970DN - Completely Blank Printout

2J5
1-4-9
(1) Completely blank printout.
Print example Causes Check procedures/corrective measures
No trans-
fer
charging.
Poor contact of engine
PWB’s transfer bias out-
put terminal and printer’s
contact (spring).
Check the installation position of the engine PWB.
Refer to figure 1-4-3 below.
Figure 1-4-3
Defective engine PWB. Replace the engine PWB (See page P.1-5-23).
No
develop-
ing bias
output.
Poor contact of engine
PWB’s developing bias
output terminal and
printer’s contact (spring).
Check the installation position of the engine PWB
(Refer to figure1-4-3 above and P.1-5-23).
Poor contact of engine
PWB’s developing bias
output terminal and devel-
oper unit’s contact.
Check the installation of the developer unit.
Refer to figure 1-4-4 below.
Figure 1-4-4
Defective engine PWB. Replace the engine PWB (See page P.1-5-23).
No laser
beam
output.
Defective laser scanner
unit.
Replace the laser scanner unit (See page P.1-5-35).
Defective main PWB. Replace the main PWB (See page P.1-5-27).
Engine PWB
Printer bottom
Contact
(spring)
Main charger
output terminal
Developing bias
output terminal
Separation bias
output terminal
Transfer bias
output terminal
Contact
(spring)
Contact
(spring)
Contact
(spring)
Contact
Developing unit
Developing
bias output
terminal
Printer inside
A
A