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TROUBLESHOOTING
2.2 U2
Step
1
(Initial Check)
Are any parts broken, malformed, incorrectly installed
or different from those listed in the specifications?
• Principle Parts to be Checked:
(1) ROS assembly, (2) MCU PWB
(3) LVPS assembly, (4) CRU sensor PWB
(5) CRU actuator, (6) EP toner cartridge
(7) ROS harness assembly
(8) CRU harness assembly
2
(Check the data in the non-volatile memory.)
Is the value of non-volatile code 1 correctly set?
3
(Check the scanner assembly in the ROS assembly.) *1
Is the scanner motor in the ROS assembly running
when test print mode is entered?
• Listen to the sound of the rotating motor just before
the U2 error occurs.
4
(Check the LD power in the LD assembly of the ROS
assembly.) *2
Is a voltage of 5 VDC supplied between P12-1PIN↔
P12-3PIN?
5
(Check the LD power in the LD assembly of the ROS
assembly.) *2
Is a voltage of 5VD supplied between P17-4PIN↔
P/J17-PIN?
*1: When it is difficult to hear the sound of the rotating motor, disconnect connector P/J14 on the drive assembly
and stop the main motor in order to hear the sound of the motor better.
*2: Be sure that the EP toner cartridge is installed and the front cover assembly is securely closed.
Check
– 118 –
Remedy
YES
Replace the part or
install the part
correctly.
See step 3.
the non-volatile code
to the correct setting.
See step 4.
See section 3.4
Faulty ROS Assem-
bly.
See section 3.9
Faulty LD Switch.
NO
See step 2.
Change the value of
See section 3.3
Faulty Scanner
Assembly.
See step 5.
See section 3.1
Faulty LVPS
Assembly 5VDC.
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