45762101TH Rev.1
2-62
2. TROUBLESHOOTING PROCEDURES
2.5.6 Print Troubleshooting
The troubleshooting procedure of abnormal printing is described as follows. The typical
abnormal printing is shown in the following Figure 2-1.
Trouble Flowchart number
Pale printing or the whole printing is faded. (Fig.2-1 )
The white section is dirty. (Fig.2-1 )
White paper is outputted (Fig. 2-1 )
Vertical black belt/ Black line (Fig. 2-1 )
Periodic failure (Fig. 2-1 )
A part of printing is extracted
Inefficient fusing (when touching the printed sheet, printed
characters or image is faded or come off.)
Vertical white belt/ White line (Fig. 2-1 )
Pale printing or
the whole printing
is faded
The white
section is dirty
Vertical black
belt/ Black line
Periodic failure Vertical white
belt/ White line
White paper
Figure 2-1
Pale printing or the whole printing is faded.
• Does the printer lack toner? (Is the message of Toner Low displayed?)
• Yes Supply the toner.
• No Is specified paper used.
• No Use specified paper.
• Yes Is the lens of the LED head dirty?
• Yes Clean the lens.
• No Is the LED head appropriately installed?
(Check that the HEAD connector of the main
board and the PC connector of the LED head are
appropriately connected.)
• No Install the LED head appropriately.
• Yes Does the contact plate of the transfer roller contact the TR terminal of
the high-voltage power supply unit properly? (See Figure 2-3 , Section
6.2 (9))
• No Adjust the contact plate of the transfer roller so that it contacts
the TR terminal of the high-voltage power supply unit and the
transfer roller shaft well.
• Yes Are the contact of the developing roller and toner supply roller of
the image drum cartridge appropriately connected to the contact
assembly? (See Figure 2-2
and )
• No Adjust so that the contacts of the developing roller and toner
supply roller are connected to the contact assembly.
• Yes Replace the transfer roller.
• Has the trouble been solved?
• Yes Completed
• No Replace the image drum cartridge.
• Has the trouble been solved?
• Yes Completed
• No Is the surface elasticity of the back-up roller normal?
• No Replace the fuser Assy.
• Yes Replace the main board or high-voltage power supply unit.
LED head cable
PC connector
Main board
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