Service manual

FO-DC550 TEST COMMAND, FAX SOFT SWITCH, TROUBLE CODES 10 - 25
50 01 Lead edge image position
(LEAD EDGE)
[Function]
Used to adjust the copy image position and the lead edge void amount on copy paper. The adjust-
ment is made by adjusting the image scan start position at 100% and the print start position (resist
roller ON timing). When this test command is executed, the current set value is displayed in 2 digits.
(Center value: 50)
When [
←
/
→
] key is pressed, the setting mode and the display are changed.
Enter the adjustment value and press [START] key to save the set value and make a copy.
When the adjustment is made by the main cassette paper feed, the adjustment values of all the paper
feed ports become the same. (When the set value is increased by 1, shift is made by 0.1mm.)
(*): Support for the installation models. For non-installation models, skip.
[Adjustment procedure]
1) Set the print start position (A: COPY mode lamp ON), the lead edge void amount (B: PRINT mode
lamp ON), the scan start position (C: SCAN mode lamp) to zero, and make a copy of the scale at
100%.
2) Measure the image loss (Rmm) of the scale.
Set C = 10 x R (mm). (Example: Set to 40.)
When the value of C is increased by 10, the image loss is decreased by 1mm. (Default: 50)
3) Measure the distance (Hmm) from the paper lead edge to the image print start position.
Set A = 10 x H (mm). (Example: Set to 50.)
When the value of A is increased by 10, the image lead edge is moved to the paper lead edge by
1mm. (Default: 50).
4) Set the lead edge void amount to B = 50 (2.5mm). (Default: 50)
When the value of B is increased by 10, the void is extended by about 0.1mm. (For 25 or less,
however, the void amount is regarded as 0.)
∗
The SFP adjustment is made by adjusting the SPF image scan start position after OC adjustment.
∗
When paper is discharged, the shifter is operated.
(Example)
[Operation]
The operation is similar to test command 46-01.
Main
code
Sub
code
Contents Details of function/operation
Mode Display item Default LED
Print start position (Main cassette
paper feed)
TRAY1 50 COPY mode lamp
Main cassette lamp
(*) Print start position (2nd
cassette paper feed)
TRAY2 50 COPY mode lamp
2nd cassette lamp
Print start position (Manual paper
feed)
MFT 50 COPY mode lamp
Manual feed lamp
Image lead edge void amount DEN-A 50 PRINT mode lamp
Image scan start position RRC-A 50 SCAN mode lamp
Image rear edge void amount DEN-B 50 COPY mode lamp
PRINT mode lamp
SCAN mode lamp
5mm
10mm
Distance from the paper lead edge
to the image lead edge, H = 5mm
Image loss, R = 4mm