Kyocera Mita KM-1530 Service Manual page 110

Maintenance
item No.
U053 Performing fine adjustment of the motor speed
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.
Setting
1. Select the item by lighting a copy exposure indicator using the copy exposure adjustment keys.
2. Change the setting using the zoom +/– keys.
Copy exposure indicator Description
Exp. 1
Exp. 2
Drive motor speed adjustment (unit: %)
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 speed adjustment (unit: %)
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 ± 0.75 mm
B = 260 ± 1.3 mm
Adjustment
1. Output an A3/11" × 17" VTC pattern in interrupt mode.
2. Measure A and B on the VTC pattern (Figure 1-4-8), and perform the following adjustments if they are
different from the correct sizes:
A: Drive motor speed adjustment
B: Polygon motor speed adjustment
Completion
Press the stop/clear key at the screen for selecting an item. The indication for selecting a maintenance item No.
appears.
Description
Drive motor speed adjustment
Polygon motor speed adjustment
B
A
Figure 1-4-8
Setting range Initial setting
–5.0 to +5.0 0
–5.0 to +5.0 0
2AV/X
1-4
1-4-61