9 March 2004 SERVICE CALL CONDITIONS
4-3
Trouble-
shooting
No.
Definition
Symptom Possible Cause
Automatic SBU adjustment error 145 D
The white levels of the white plate and
the white paper are extraordinarily
different during the Scan Auto
Adjustment (
☛
SP4-428-001).
•
Defective exposure lamp
• Unclean white plate
•
Incorrect position or width of white
plate scanning (☛ SP4-015)
• Defective BICU board
•
Defective SBU board
Image transfer error 193 B
Scanned images are not transferred to
the controller memory within one
minute.
• Defective BICU board
•
Defective controller board
Memory address error 198 B
The BICU does not receive the memory
address report from the controller within
one minute.
• Inconsistency between the BICU
firmware and the controller firmware
•
Defective BICU
• Defective controller
Charge roller current leak 302 B
The polling module detects a current
leak of the charge roller.
•
Defective charge roller
• Defective high voltage supply board
•
Loose connection of the PCU
Polygonal mirror motor error 320 B
The polygon mirror motor does not
reach the operating speed within 10
seconds. Or, the polygon mirror motor
remains out of the operating speed for
0.2 second after reaching the operating
speed.
• Defective polygon mirror motor
•
Loose connection between the
polygonal mirror motor and the BICU
• Defective cable between the BICU
and the polygon mirror motor
• Defective BICU
No laser writing signal (F-GATE) error 321 B
The poling module does not detect the
laser writing signal (F-GATE) asserting
after the laser crosses 5 mm from the
start point on the drum surface.
•
Defective BICU
• Loose connection on the fax controller
or the printer controller
•
Defective fax controller or printer
controller
Laser synchronization error 322 B
The main scan synchronization
detector does not detect the laser
signal for 0.5 second.
•
Toner bottle not installed
• Loose connection between the LD
unit and the BICU
•
Defective cable between the BICU
and LD unit
• LD unit out of position
•
Defective LD unit
• Defective BICU
TD sensor error 390 B
The BICU detects the TD sensor
outputting extraordinary voltage (less
than 0.2 V or more than 4.0 V) 10 times
consecutively.
•
Defective TD sensor
• Loose connection of the PCU
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