Service manual

2 TROUBLESHOOTING BY PHENOMENON
7-5
DUPLO DF-755 86V-M12D0-0
Yes:
Replace the paper feed rings.
Refer to "Chapter 3 >2.1.2 Removing the paper feed rings."
No:
Adjust the folding stopper.
Refer to "Chapter 5 > 2.2.5 Adjusting the parallelity of the folding stopper."
2.1.5 When the second paper is not fed after the first paper is
discharged
1) Is the paper mis-fed?
Yes:
Refer to "2.1.1 Mis-feed."
2) Does the ejection gate sensor (PS2e, PS2r) function properly?
Yes:
Replace the MC unit (PCB1).
No:
Check the connection of connectors between the ejection gate sensor (PC2e, PC2r)
and MC unit (PCB1), and if it is found to be normal, replace the ejection gate
sensor (PC2e, PC2r).
2.2 Folding Problem
2.2.1 Folding misalignment along vertical length of paper
1) Has the paper size been changed during operation?
Yes:
Once you change a paper size, adjust the stopper position using the rough
adjustment knob of the folding plate.
No:
Adjust the folding section.
Refer to "Chapter 5 > 2 FOLDING SECTION."
2.2.2 Folding misalignment along sides of paper
1) Is the bearing support lever locked?
No:
Lock the bearing support lever on either side.
2) Is there clearance between the side guides and paper?
Yes:
Align paper neatly and stack on the paper feed table, then push the side guides
lightly against the paper.
3) Is the paper trimmed precisely?
No:
If the trimming misalignment of the paper lead edge is large, it cannot be
corrected using the slant correction paper feed knob alone. Have the user use
paper with little trimming misalignment.
4) Is the press roll dirty or worn out?
Yes:
Clean or replace it.
Refer to "Chapter 1 > 6 USER MAINTENANCE."
Refer to "Chapter 3 > 3 FOLDING SECTION."
No:
Adjust the folding section.
Refer to "Chapter 5 > 2 FOLDING SECTION."