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Chapter 6 Trouble Guide
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3. Troubleshooting
Do not use a flammable static electricity removal spray.
Doing so could cause build-up of gas inside the machine,
which in turn could cause ignition, resulting in fire and explosion.
Condition
Cause
Solution
Power is not turned on.
The power cord is not connected.
Connect the power cord.
The power switch is not turned on.
Turn on the power switch.
The machine does not
start operation when the
key is pressed.
Paper is not stacked.
Stacking paper on the paper feed tray.
The paper switch is not responding.
Stacking paper in correct position so that
the paper switch responds.
Paper has jammed.
Remove jammed paper.
The top cover and side cover are open.
Close the covers which are open. (The side
cover will not be closed if the folding plate 2
is not attached correctly.)
Non-standard paper is used in standard
paper settings. (DF-999/DF-999A)
Change the settings to match non-standard
paper.
The paper feed guide is off the paper size
detection area. (DF-999/DF-999A)
Secure the paper feed guide correctly.
The paper set lever is not lowered. (DF-990/
DF-990A)
Lower the paper set lever.
[D-Feed Detect] is turned on but test
folding was not performed. (DF-999/
DF-999A)
Perform test folding.
A6, A7, B7 or other non-standard paper is
used. (For EU)
Input the paper size.
The folding stopper of
folding plate 1 or 2 does
not operate.
The folding plates 1 and 2 are not set
properly.
Set the folding plates 1 and 2 properly.
Paper is not folded at the
normal folding position.
The folding plates 1 and 2 are not set
properly.
Set the folding plates 1 and 2 properly.
Static electricity is built up on paper.
• Use a commercially available static
electricity removal spray.
• Separate the paper well.
• Humidify with a humidifier as required.
Paper jam occurs.
Paper is not separated well.
Separate the paper well.
Paper is curled.
Correct the paper curl before use.
The folding roller is stained.
Clean with a cloth moistened with alcohol.
The stacker roller is not positioned
correctly.
Re-set the position of the stacker roller.
Static electricity is built up on paper.
• Use a commercially available static
electricity removal spray.
• Separate the paper well.
• Humidify with a humidifier as required.