Kyocera FS-1020D Service Manual page 38

2FM
Code Error indications
4000
START
+24 V DC at pin 5 of
YC06 on engine board
(KP-1046) ?
Yes
Connect oscilloscope to
pin 1 (PLGCLK) and pin
3 (PLGDRN) of YC06 on
engine board (KP-1046).
Turn power switch off,
then on.
Does
pin 3 (PLGDRN) of
YC06 on engine board
(KP-1046) goes high,
then low?
Yes
Does
pin 1 (PLGCLK) of
YC06 on engine board
(KP-1046) output
square-wave*
signal?
Yes
Connect oscilloscope to
pin 2 (PLGRDYN) and
pin 3 (PLGDRN) of
YC06 on engine board
(KP-1046).
Turn power switch off,
then on.
1-5-4
Check procedures/corrective measures
Replace engine board
No
(KP-1046). See page 1-
6-9.
Replace engine board
(KP-1046). See page 1-
6-9.
Turn power switch on.
No
No
*: 1417 Hz
(705 µs)
A
Continued
to next page.
Contents
Laser scanner unit [Polygon motor] error
No
OK?
Yes
End.
Does pin 2
(PLGRDYN) of YC6 on
engine board (KP-1046) 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.
OK?
Yes
End.
Replace laser scanner
unit. See page 1-6-28.
Turn power switch on.
OK?
Yes
End.
Replace harness (2DC2714)
between engine board and
laser scanner unit.
Yes
Replace engine board
(KP-1046). See page 1-
6-9.
No
Replace harness (2DC2714)
between engine bard and
laser scanner unit.
No