4000 - Laser Scanner Unit [Polygon Motor] Error - Kyocera Mita Ecosys FS-1010 Service Manual

(2) 4000 - Laser scanner unit [Polygon motor] error

Call service
4000:nnnnnn
+24 V DC at pin 5 of
YC06 on engine board
(KP-882) ?
Yes
Connect oscilloscope to
pin 1 (PLGCLK) and pin
3 (PLGDRN) of YC06 on
engine board (KP-882).
Turn power switch off,
then on.
Does
pin 3 (PLGDRN) of
YC06 on engine board
(KP-882) goes high,
then low?
Yes
Does
pin 1 (PLGCLK) of
YC06 on engine board
(KP-882) output
square-wave*
signal?
Yes
Connect oscilloscope to
pin 2 (PLGRDYN) and
pin 3 (PLGDRN) of
YC06 on engine board
(KP-882).
Turn power switch off,
then on.
No
Replace engine board
(KP-882). See page 5-11.
Replace engine board
(KP-882). See page 5-11.
Turn power switch on.
No
No
*: 1417 Hz
(705 µs)
A
Continued
to next page.
No
OK?
Yes
End.
Does pin 2
(PLGRDYN) of YC6 on
engine board (KP-882) goes
high, then low, within 8 seconds
after pin 3 (PLGDRN)
goes high, then
low?
No
Replace laser scanner
unit. See page 5-29.
Turn power switch on.
No
OK?
Yes
End.
6-11
Printer indicators
Replace laser scanner
unit. See page 5-29.
Turn power switch on.
No
OK?
Yes
End.
Replace harness (S02779)
between engine bard and
laser scanner unit.
Yes
Replace engine board
(KP-882). See page 5-11.
Replace harness (S02779)
between engine bard and
laser scanner unit.
FS-1010