7)Solid Black Print; Solid Black Print; Solid Black On A Full Page - Oki C5500 Maintenance Manual

7.5.3.(7)

Solid Black Print

(7-1) Solid black on a full page

Confirmation Items
(7-1-1) High-voltage contact state
CH terminal
CH terminal
ID unit terminal
(7-1-2) State of high-voltage output
CH output
43085101TH Rev.1
Confirmation Tasks
Check visually from above to see if the terminal extending from
the printer is properly in contact with the high-voltage terminal
on the left side of the ID unit.
Check to see if the high-voltage terminal remains in normal
contact on the high-voltage PCB. Remove the high-voltage PCB
by opening the left cover, and check to see if the terminal is
abnormally installed.
Ensure visually that the high-voltage terminal of the ID unit is
properly in contact with the contact ASSY (see Figure 7-3)
If a high-voltage probe is available among the maintenance
tools, open the left cover, and check the CH output with the
high-voltage probe through the solder side of the high-voltage
PCB while the machine is printing.
(The high-voltage probe is not an ordinary maintenance tool.)
Charging Roller
Ground
Developing Roller
Toner Supply Roller
Figure 7.3
Oki Data CONFIDENTIAL
Action at NG
Replace the terminal of
the printer side.
Redo the installation of
the terminal properly.
Replace the ID unit,
high-voltage PCB, or
modify the high-voltage
terminal. To use a new
ID unit on a trial basis,
use FUSE KEEP
MODE of the System
Maintenance Menu.
Replace the high-
voltage PCB.
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