Service manual

1 PAPER FEED SECTION
5-4
DUPLO DF-755 86V-M12D0-0
1.3 Checking the Paper Feed Gear and Back Lash
If there is no appropriate backlash between the paper feed gear and clutch gear, it may
cause a noise or wear-out and damage to the parts.
1) Check that a backlash of between 0.1 mm (0.004 inch) and 0.2 mm (0.008 inch) exists
between the paper feed gear and clutch gear.
[1]
Paper feed gear
[2]
Clutch gear
[A]
Backlash: 0.1 to 0.2 mm (0.004 to 0.008 inch)
2) Check that grease is applied around the gear.
[1]
[2]
[A]
1.4 Adjusting Solenoid
If the solenoid is not properly adjusted, the solenoid may not be pulled back or drawn back
enough, hindering the turning of the paper feed ring or causing double-feed.
1) Make the solenoid off and the plunger free.
[1]
Solenoid
[2]
Plunger
2) Adjust the solenoid bracket position so that the protruding part of the clutch case touches
the solenoid lever in the area of 2 mm (0.08 inch) to 3 mm ( 0.12 inch) from its tip.
[3]
Clutch case
[4]
Protruding part
[5]
Solenoid lever
[6]
Solenoid bracket
[A]
2 to 3 mm (0.08 to 0.12 inch)
3) Adjust the solenoid bracket position so that the protruding part is tilted at 1 to 3° to the left
from the vertical position when the tip of the solenoid lever touches the protruding part. (This
adjustment is to ease a burden on the solenoid lever when the solenoid is on.)
[3]
Clutch case
[4]
Protruding part
[5]
Solenoid lever
[6]
Solenoid bracket
[B]
1 to 3
°