Kyocera FS-1800 - E2 Laser Scanner Unit (Polygon Motor) Error

6-18
FS-1800/1800N | FS-3800/3800N
(14) E2 Laser scanner unit (Polygon motor) error
Yes
Yes
Yes
No
No
No
No
Does
pin #31 (POLON*) of
YC206 on engine board
(KP-864) goes high and
then low?
Does
pin #1 (POLCLK) of
YC206 on engine board
(KP-864) output
square-wave*
1
signal?
Call service
personE2:01234546
*
1
: [FS-1800/1800N]
2,298 Hz
[FS-3800/3800N]
2,314.93 Hz
Print status page.
Print status page.
Print status page.
Remove and check
harness between
engine board (KP-864)
and laser scanner unit.
Turn power switch off.
Turn power switch on.
+24 V DC
at #33 pin of YC206
on engine board
(KP-864) ?
Yes
Yes
No
Replace harness between
engine board (KP-864)
and laser scanner unit.
OK?
Replace engine board
(KP-864). See page 5-22.
Replace engine board
(KP-864). See page 5-22.
Replace laser scanner
unit. See page 5-37.
Does pin
#30 (POLRDY*)
of YC206 on engine board
goes low, after pin #31
(POLON*) of YC206
goes low?
NOTE:
Pins of YC206 connector are
crowded and tiny. When if
measuring signal, contact
measurement probe with pins of
YC206 connector accurately.
NOTE:
When If not solved this flow chart,
try to replace below items.
Harness (S02404) scanner unit
and engine board (KP-864)
Engine board (KP-864) and scanner
unit (replace at the same time)
Meaning Suggested causes Corrective action
POLRDY* does not
go low within 20
seconds after POLON*
goes low (When
starting) or within 16
seconds after REGPAP
signal goes high
(during printing).
• Defective gate array U204 on the engine
board.
• Defective polygon motor.
• Improper connector insertion.
• Defective harness between laser scanner unit
and engine board.
Follow the flow chart
below.