Toshiba e-STUDIO4500c Service Manual page 397

April, 2007
General Displayed
Code
23 ID Sensor
Output Error
AC Charge 31 AC Charge
Adjust Error 1
32 AC Charge
Adjust Error 2
Item Major Cause
Vsg_reg (SP3121) less than 0.5V.
ID sensor harness loose,
disconnected, damaged
ID sensor damaged
Note: Vsg_reg refers to the
reading of the drum surface done
with the direct reflection sensors
in both the color and black ID
sensors.
Vpp could not be adjusted after
20 attempts.
Bias path defective
Charge gap abnormal (too
large)
Charge roller dirty
Drum coated with film
Vpp greater than 2.80 kV.
Bias path defective
Charge gap abnormal
Charge roller dirty, defective
SPECIAL PROCEDURES
Remove the ITB unit.
Check the ID sensor harness connections and make sure that they
are tight.
Check the harnesses for breaks.
If the harnesses are undamaged and tightening the connections
does not solve the problem, replace the ID sensor plate.
Make sure that the bias path and drum are grounded correctly.
Check the drum and both ends of the charger roller for any foreign
matter.
Check the gap between the charge roller and the drum to confirm
that it is not too large.
If the grounds and gap is normal, clean the charger roller or replace
it.
Make sure that the bias path and drum are grounded correctly.
Check the drum and both ends of the charger roller for any foreign
matter.
Check the gap between the charge roller and the drum to confirm
that it is not too large.
If the grounds and gap is normal, clean the charger roller or replace
it.
4-19
Action