Xerox 5915, Service Manual

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2-19 2.4 Level 2 Troubleshooting
Section 2 Troubleshooting
2.4 Level 2 Troubleshooting
2.4.2 U-Code F.I.P’s
U1-1 M/C CLOCK FAIL
Ref. BSD: 2
Preparation : Ensure that the following connector is securely
connected.
•
P/J404 of Main PWB
Procedure
Open the Front Cover and cheat the Front Interlock. Enter Diag.
(C/E) Mode. Enter Code[4-1] and rotate the Main Motor.
Does the Main Motor keep stopping?
Y N
Does the Main Motor stop after rotating for 1-2 seconds?
Y N
Open the ClamShell and restart the Main Motor.
Do abnormal noises occur or does the Main Motor
rotate irregularly?
Y N
WARNING: Power off the machine and
disconnect the power cord .
Check the mechanics (Gear, Bearing, etc.) of
the following and replace parts if necessary.
Fuser Assy(PL8.4)
Regi. Roller Gear(PL2.7)
Slide out the Drum Unit and restart the Main Motor.
Do abnormal noises occur or does the Main Motor
rotate irregularly?
Y N
Check the Drum Unit for its drive mechanics. If
any load or abnormal noise exists, replace the
Drum Unit.
WARNING: Power off the machine and disconnect the
power cord
Check the mechanics(Gear, Bearing, etc.) of the
following and replace parts if necessary.
Deve Assy(PL6.2)
Main Drives(PL1.1/1.2/1.3)
A B
A B
Is the voltage from J404-5 of Main PWB to COM +5VDC?
Y N
Replace the Main Motor(PL1.1/1.2)/Main PWB(PL9.1) in
order.
Replace the Main PWB.
Is the voltage from J404-1of Main PWB to COM +24VDC?
Y N
Check +24VDC circuit in the DC Wiring Diagram.
Is the voltage from J404-3 of Main PWB to COM +5VDC?
Y N
Check +5VDC circuit in the DC Wiring Diagram.
Is the voltage from J404-6 of Main PWB to COM +5VDC?
Y N
Replace the Main PWB.
Replace the Main Motor.