15
GB
9.694.004 V1.04
ENGLISH
MD 850
Troubleshooting and Maintenance
Troubleshooting Chart
Malfunction
Possible cause
Remedy
Material feed not uniform or
loud running noise
Transport belt guide
Transport belt
Damaged
No transport
Motor
Replace Teflon belt on guide die
Replace transport belt
Check belt tension
Replace motor
Seal does not hold
Temperature
too low
Pressure
too low
Sealing die
Distance between the sealing dies
to great
Increase temperature
Readjust pressure of sealing roller or
replace sealing roller
Set distance between the
sealing dies to 0.5 mm
Sealing seam distorted
Pressure
too high
Loosen upper guide die and readjust
downward
Paper side of
package discolored
or side fold shrunk
Temperature
too high
Reduce temperature
No imprint or
imprint incomplete
Programming
Start of print not correctly adjusted
Ink ribbon
Printer head
Control board
Reprogram start of print
Ink ribbon not correctly installed
Replace ink ribbon
Replace print head
Replace control board
Imprint too weak
Ink ribbon
Print head
Paper hold-down
Replace ink ribbon.
Readjust print head.
Replace pressure spring for paper
hold-down
Keyboard does not work
Keyboard
Display board
Control board
Check keyboard connector for good
contact.
Replace keyboard
Replace display board.
Replace control board
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