Aiwa NSX-AJ20 Manuel de service télécharger pdf (Page 110)

2AV/X

1-4-61

1-4

Maintenance

Description

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 Setting range Initial setting

Exp. 1 Drive motor speed adjustment –5.0 to +5.0 0

Exp. 2 Polygon motor speed adjustment –5.0 to +5.0 0

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

Figure 1-4-8

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.

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Aiwa NSX-AJ20 Manuel de service Page 110