Service manual

1-4-22
2AV/X
Description
Maintenance
item No.
1-4
U099 Checking the original size detection
Description
Displays the original width detection data and sets the original width detection threshold.
Purpose
To check the original width detection. Also to change the original size detection threshold if the size of the
original on the contact glass is detected incorrectly.
Start
1. Press the start key. The screen for selecting an item is displayed.
2. Select the item.
3. Press the start key. The screen for executing is displayed.
Checking the original width detection data
Setting or checking the original width detection threshold
Display
DATA
B/W LEVEL
Description
Method to display the original width detection data
1. Place an original on the contact glass and turn the original detection switch on. The exposure lamp turns
on and the width of the original is detected. The scanner data taken at the nine points from (1) at the
machine rear to (9) at the machine front is displayed on the message display as follows.
The data is displayed within the range of 000 to 255, 000 indicating white (original present) and 255
indicating black (no original).
(1) (2) (3)
(4) (5) (6)
(7) (8) (9)
Figure 1-4-6
2. To return to the screen for selecting an item, press the stop/clear key.
Method to set or check the original size detection threshold
1. Place an original on the contact glass and turn the original detection switch on. The original size
detection starts and detection data is displayed.
* See Paper size in U073 for the paper size for each setting.
Display
Description
Data
range
Remarks
LEVEL
WAIT TIME
ORIGINAL AREA
SIZE
B_DATA
W_DATA
Scanner data threshold
Time between original detection switch turning on
and reading-in of scanner data
Detected original width
Original size detected by scanner data and original
size sensor detection data
Black (no original) data at the point on the boundary
between original area and no original area
White (original present) data at the point on the
boundary between original area and no original area
0 to 255
0 to 100 ms
0 to 350 mm
0 to 63*
0 to 255
0 to 255
Initial
setting
170
50
Adjustable
Adjustable
2. To change the original size detection threshold, select LEVEL or WAIT TIME using the cursor up/down
keys and change the setting using the cursor left/right keys.
3. Press the start key. The value is set.
4. To return to the screen for selecting an item, press the stop/clear key.
Completion
Press the stop/clear key at the screen for selecting an item. The screen for selecting a maintenance item
No. is displayed.