Kyocera Mita KM-4530 Service Manual page 85

2BC/D-1
Maintenance
item No.
U053 Adjusting motor speed standard
Description
Performs fine adjustment of the speeds of the motors.
Purpose
Used to adjust the speed of the respective motors when the magnification is not correct.
Method
Press the start key. The screen for adjustment is displayed.
Setting
1. Select the item to be set. The selected item is displayed in reverse.
2. Change the setting using the cursor up/down keys.
Display
MAIN MOTOR
CONV MOTOR
POLYGON MOTOR
MAIN MOTOR /CONV MOTOR
Increasing the setting makes the image longer in the auxiliary scanning direction, and decreasing it makes
the image shorter in the auxiliary scanning direction.
POLYGON MOTOR
Increasing the setting makes the image longer in the main scanning direction and shorter in the auxiliary
scanning direction; decreasing the setting makes the image shorter in the main scanning direction and
longer in the auxiliary scanning direction.
3. Press the start key. The value is set.
Interrupt copy mode
While this maintenance item is being performed, a VTC pattern shown below is output in interrupt copy mode.
Correct values for an A3/11" × 17" output are:
A = 300 ± 1.5 mm
B = 270 ± 1.0 mm
Adjustment
1. Output an A3/11" × 17" VTC pattern in interrupt mode.
2. Measure A and B on the VTC pattern (Figure 1-4-1), and perform the following adjustments if they are
different from the correct sizes:
A: Image formation motor speed adjustment
B: Polygon motor speed adjustment
Completion
Press the stop/clear key at the screen for adjustment. The screen for selecting a maintenance item No. is
displayed.
1-4-20
Description
Description
Image formation motor speed adjustment
Paper conveying motor speed adjustment
Polygon motor speed adjustment
Figure 1-4-1
Setting range Initial setting
0 to +14 6
0 to +14 3
-20 to +20 0