Toshiba e-STUDIO4500c Service Manual page 398

SPECIAL PROCEDURES
General Displayed
Code
ID Sensor 55 Development
Pattern Gamma Error
Detection 1
Item Major Cause
Development gamma (SP3561)
greater than 6.0 (mg/cm
April, 2007
Switch the machine OFF and ON then do SP3820 002.
2
/-kV).
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.
4-20
Action