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Step
Action and Questions
3
Check the ITU assembly interlock switch actuator to make
sure it is not damaged or broken and actuates the switches
correctly.
Is the actuator damaged or broken?
4
Front Cover Assembly
Does the front cover close correctly?
5
Front Cover Assembly
Check to make sure the front cover flag is not broken or
damaged and actuates the switches correctly.
Is the flag broken or damaged?
6
HVPS/Cover Open Interlock Cable Assembly to Engine
Board - Check to make sure that the cable is correctly
connected to J86 on the engine board.
Is the cable connected correctly?
7
HVPS/Cover Open Interlock Cable Assembly - Make sure
the Front Cover is closed and the ITU is correctly installed.
Disconnect the switch cable from J86 on the engine board.
Check for continuity between J86-1 and J86-2 on the cable
connector.
Is there continuity?
500 Sheet Drawer Option Service Check
Whenever the 500 Paper Tray has to be removed, use caution as the autocompensator
may be in its down position which could result in damage to the autocompensator
assembly.
For Service Error 990 Tray X, X=Tray 1, 2, 3, 4 or 5. This is the tray that has a problem or
needs service.
The Tray Empty Sensor, Paper Low Sensor and Pass Thru Sensor for any installed Tray X
(1 thru 4) can be checked using the
page
5060-XXX
3-13.
Yes
Replace the
"ITU
Assembly" on
page 4-40
Go to step 5
Replace the
"Front Cover
Assembly" on
page 4-21
Go to step 7
Replace the
"Engine
Board" on
page 4-14
"Input Tray Sensor Test (500-Sheet Trays)" on
Diagnostic Information
No
Go to step 4
Install the
front cover
correctly or
repair as
necessary
Go to step 6
Install the
cable correctly
Replace the
HVPS/Cover
Open
Interlock
Switch/Cable
Assembly
2-109
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