Service manual

ADJUSTMENT
2-53
2 ADJUSTMENT
6. LD1 bias adjustment
LD1 bias adjustment is inhibited in the field.
7. LD1 bias adjustment
LD1 bias adjustment is inhibited in the field.
8. Auto gamma adjustment (1 dot)
Performs gamma adjustment (1 dot) automati-
cally.
This adjustment should be performed when the
drum, developer, write unit, or dust-proof glass is
replaced.
Preparation:
Be sure the drum unit is set.
Auto maximum density adjust-
ment, auto dot diameter adjust-
ment, LD1 offset adjustment and,
LD2 offset adjustment must have
been completed.
Reference:
If any one of the following error messages
appears during auto gamma adjustment,
clean the TSCB (toner control sensor board),
check its installation state, and retry the auto
gamma adjustment.
<1>Error 1: The
γ
sensor dirt correction has
been corrected.
<2>Error 2: No signal is output from the
γ
sen-
sor. No control patch is output.
<3>Error 3: A recurrence error occurred dur-
ing
γ
curve calculation.
Step Operation
1
Enter the 36 mode.
2
[Adjustment mode menu Screen]
Press " Process adjustment".
3
[Process adjustment mode menu
Screen]
Press " Drum peculiarity adjust-
ment".
4
[Drum peculiarity adjustment mode
menu Screen]
Press " Auto gamma adjustment
(1 dot)".
5
[Auto gamma adjustment (1 dot)
Screen]
Press the key.
The drum and developer operate to
automatically adjust Gamma.
Adjustment completes in about 10 sec-
onds and a complete message is dis-
played.
6
Press the key to return to
the Drum peculiarity adjustment mode
menu Screen.
1
2
8
Start
RETURN