Panasonic UF 890 - Panafax B/W Laser, Service Handbook

Page: 43 / 94

43
LSU Error Detection
Motor ON
Polygon Motor does not
reach constant speed
during wake up state.
Print Start
Polygon Motor ON
Polygon Motor Ready
nPMON nPMRY:ON
Normal Condition
OFF OFF OFF OFF
Normal Condition
3 sec
1 ms
20 sec
nPRNT
nPMON
(CN51.9)
nPMRY
(CN51.8)
E31
nPMRY
Polygon Motor does not
maintain constant speed.
Laser Timing Signal
E32
nPMRY
nVIDEO
(CN51.5)
Laser Timing Detection
nHSYNC
(CN51.1)
nPMRY does not go low for more than 2 sec during 3 sec to
20 sec after nPMON goes low.
nPMRY goes high 4 times during printing.
Can not detect
Laser Timing
E36
nHSYNC
(CN51.1)
nHSYNC timing signal is less than 60% of nVIDEO signal.