Kyocera FS-920 - Page 47

2GL/2FV/2FW
1-5-5
4000
(E2)
Polygon motor (laser scanner unit)
error
• The polygon motor ready input is not
given for eight seconds during the
polygon motor is driven.
Defective harness
between engine/
high voltage PWB
and laser scanner
unit.
Follow the flow chart.
Defective engine/
high voltage PWB.
Defective polygon
motor (laser scan-
ner unit).
Code Contents
Remarks
Causes Check procedures/corrective measures
No
No
No
No
No
No
OK?
OK?
OK?
End.
End.
Start
End.
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Connect oscilloscope to
pin 1 (PLGCLK) and pin
3 (PLGON) of YC3
connector on the
engine/high voltage
PWB.
Connect oscilloscope to
pin 2 (PLGDRY) and pin
3 (PLGON) of YC3
connector on the
engine/high voltage
PWB.
Turn power switch off,
then on.
Turn power switch on.
Turn power switch on.
Turn power switch off,
then on.
Turn power switch on.
* 1417 Hz (705
µs)
Replace engine/high
voltage PWB.
See page 1-6-17.
Replace engine/high
voltage PWB.
See page 1-6-17.
Replace engine/high
voltage PWB.
See page 1-6-17.
Replace laser scanner
unit. See page 1-6-21.
Replace harness between
engine/high voltage PWB
and laser scanner unit.
Replace engine/high
voltage PWB.
See page 1-6-17.
Replace laser scanner
unit. See page 1-6-xx.
+24 V DC
at pin 5 of YC3
connector on the
engine/high voltage
PWB?
Does pin 3
(PLGON) of YC3
connector on the
engine/high voltage PWB
goes high, then
low?
Does pin
2 (PLGDRY) of
YC3 connector on the
engine/high voltage PWB goes
high, then low, within 8 seconds
after pin 5 (REMOTE)
goes high, then
low?
Does pin
1 (PLGCLK) of
YC3 connector on the
engine/high voltage PWB
output square-wave
*
signal?
Replace harness between
engine/high voltage PWB
and laser scanner unit.