Toshiba e-STUDIO 4500c, Service Manual

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SPECIAL PROCEDURES April, 2007
4-22
General Displayed
Code
Item Major Cause Action
61 LD Failure A laser diode failed to fire and
write the ID sensor pattern.
•
Toner shield glass dirty
•
PCU set incorrectly
•
Laser diode defective
1. Copy the color test pattern to determine which color is abnormal.
2. Turn the machine OFF.
3. Open the front door, remove the toner supply unit and check the
toner shield glass for dirt.
4. Reassemble the machine, switch the machine ON, then do SP3820
001.
Notes
•
The probes of the potential sensors of each PCU are located at
different positions. This failure can be caused by installing a
potential sensor at the incorrect position. However, you can
eliminate this as a cause if a new PCU is installed. (A guide ensures
prevents a PCU from being installed at the wrong location.)
•
If the machine fails to return SC240 to SC243, you can eliminate a
defective LD as the cause of the problem.
62 Vr Error Vr (residual voltage) greater than
–200V.
•
Drum deteriorated
•
Toner shield glass dirty
•
Open the front door, remove the toner supply unit, and check the
toner shield glass for dirt.
•
Clean the glass then do SP3820 001.
•
If this does not solve the problem, replace the drum.
63 Vd Adjust
Error
Vd could not be adjusted within
±
10V.
•
Charge roller dirty
•
Drum defective
•
Replace the charge roller
•
Replace the drum.
Potential
Adjustment
64 Vpl Adjust
Error
Vpl could not be adjusted within
±
5V.
•
Drum deteriorated due to
filming
•
Charge roller dirty
•
Replace the charge roller
•
Replace the drum.
90 Potential
Adjust Error
SP3501 (potential control method)
is set to 1 (Fixed).
•
Do SP3501 001 and select "0" (Auto).
Abnormal
End
99 Forced
Termination
Door open, power OFF, or other
problem interfering with process
control self-check. Make sure the machine is turned ON.
Make sure the front door is closed completely.