Utax PF 420, Service Manual

Page: 40 / 77

3MH
1-3-17
U034
Adjusting the print start timing
Description
Adjusts the leading edge registration or center line.
Purpose
Make the adjustment if there is a regular error between the leading edges of the copy image and original.
Make the adjustment if there is a regular error between the center lines of the copy image and original.
Make the adjustment if there is a regular error between the trailing edges of the copy image and original.
Method
1. Press the start key.
2. Select the item to be adjusted using the cursor up/down keys. The setting screen for the selected item is
displayed.
Adjustment: Leading edge registration adjustment
1. Select the item to be adjusted using the cursor up/down keys.
2. Press the interrupt key.
3. Press the start key to output a test pattern.
4. Change the setting value using the cursor left/right keys.
For output example 1, decrease the value.
For output example 2, increase the value.
Figure 1-3-7
5. Press the start key. The value is set.
Caution
Check the copy image after the adjustment. If the image is still incorrect, perform the following adjustments in
maintenance mode.
Maintenance
item No.
Description
Display Description
ADJ. RCL ON TIMING Leading edge registration adjustment
ADJ. LSU ON TIMING Center line adjustment
ADJ. MGN REAR Trailing edge margin adjustment
Display Description Setting
range Initial
setting Change in
value per step
RCL ON Paper feed from cassette -5.0 to 10.0 2.8 0.1 mm
RCL BYP Paper feed from MP tray -5.0 to 10.0 0.0 0.1 mm
RCL T1 Paper feed from first paper feeder -5.0 to 10.0 0.0 0.1 mm
RCL T2 Paper feed from second paper feeder -5.0 to 10.0 0.0 0.1 mm
RCL T3 Paper feed from third paper feeder -5.0 to 10.0 0.0 0.1 mm
RCL DUP Duplex mode (second side) -5.0 to 10.0
0.8
0.1 mm
Correct image Output
example 1
Output
example 2
Leading edge registration (20 ± 1.0 mm)
U071
(See the service manual
for the machine.)
U066
(See the service manual
for the machine.)
U034