Panasonic UF-890 Service Manual page 190

LSU Error Detection
nPRNT
Print Start
nPMON
(CN51.9)
Polygon Motor ON
nPMRY
(CN51.8)
Polygon Motor Ready
E31
nPMRY
Polygon Motor does not
reach constant speed
during wake up state.
E32
nPMRY
Polygon Motor does not
maintain constant speed.
nVIDEO
(CN51.5)
Laser Timing Signal
nHSYNC
(CN51.1)
Laser Timing Detection
E36
nHSYNC
(CN51.1)
Can not detect
Laser Timing
Motor ON 3 sec
nPMRY does not go low for more than 2 sec during 3 sec to
20 sec after nPMON goes low.
nPMON nPMRY:ON
nPMRY goes high 4 times during printing.
1 ms
nHSYNC timing signal is less than 60% of nVIDEO signal.
190
Normal Condition
20 sec
OFF OFF
Normal Condition
OFF OFF