Toshiba e-STUDIO 4500c, Service Manual

Page: 398 / 1120

SPECIAL PROCEDURES April, 2007
4-20
General Displayed
Code
Item Major Cause Action
ID Sensor
Pattern
Detection
55 Development
Gamma Error
1
Development gamma (SP3561)
greater than 6.0 (mg/cm
2
/-kV).
•
Switch the machine OFF and ON then do SP3820 002.
•
Do SP3561 005 to 008 to confirm that development gamma is within
the target range (-0.15 to +0.25)
•
If not within the target range, do the procedure again.
If the machine returns SC410 to SC413 and process control does not
end normally, do this procedure:
1. Change the settings for SP3301 001 to 004 from "1" (PID) to "0"
(Fixed).
2. Do SP2109 002 and select Pattern 12.
3. Change the settings of SP2109 005 to 008 from 63 to 0, except for
the color which showed a development gamma error.
4. Return to the copy window and do the test print at least 10
patterns.
5. Do SP3820 002.
•
If the patterns are normal, do Steps 2 and 3.
•
If the patterns are not normal, repeat Steps 2 to 5.
6. Do SP3301 001 to restore PID toner supply.