Konica Minolta 7020 Service Manual page 323

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3
Code Causes
J20-2 ADU door open jam
SW3 (Interlock switch) went OFF during printing.
J20-3
FNS front door open jam
MS701 (front door) went OFF during printing.
J20-4 System emergency stop jam
J20-5 FNS conveyance door open jam
PS717 (conveyance cover open/close detect)
went OFF during printing.
J20-6
FNS shutter switch operation jam
MS702 (shutter) went ON during printing.
J50-1 Failed to receive print request from system within
a predetermined time after PS1 (registration) ON.
J50-2 "Valid" signal failed to turn ON within a
predetermined time after start of printing.
J50-3
MC1 (registration) failed to turn ON within a
predetermined time after start of printing.
Resulting
operation
Printer section
stops
immediately.
Machine stops
immediately.
8-29
LIST OF JAM CODES
Correction
Remove jammed paper
according to message.
Opne the ADU door,
remove any jammed paper,
and close the door.