Kyocera FS-1050 Service Manual - Page 129

Call service 2010 - Main motor error

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(3) Call service 2010 - Main motor error Call service 201C0all service 2010 Remove and check harness (S02773) between engine board (KP-882) and main motor at pins 6 to 9 on both ends. No OK? Yes +24 V DC at pin No 9 of CN1 on main motor? Yes Connect circuit tester to pin 8 (MOTORN) of YC04 on engine board (KP-882) and ground. Turn printer power off, then on. Replace harness (S02773) between engine board (KP-882) and main motor. Connect oscilloscope to pin 8 (MOTORN) and pin 7 (MRDYN) of CN1 on main motor. Print status page. Turn power switch off, then on. Does pin 8 (MOTORN) Yes of YC04 on engine board (KP-882) goes high, then low? No No Replace engine board (KP-882). See page 5-11. Print status page. Does pin 7 (MRDYN) of CN1 on main motor goes high, then low, within 3 seconds from pin 8 (MOTORN) goes low? Yes Replace main motor. See page 5-15. If not solved, check or replace drive unit. See page 5-16. 6-9 FS-1050

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6-9
FS-1050
(3) Call service 2010 - Main motor error
Connect circuit tester to
pin 8 (MOTORN) of
YC04 on engine board
(KP-882) and ground.
Turn printer power off,
then on.
Print status page.
Print status page.
Turn power switch off,
then on.
Connect oscilloscope to
pin 8 (MOTORN) and
pin 7 (MRDYN) of CN1
on main motor.
Does
pin 8 (MOTORN)
of YC04 on engine board
(KP-882) goes high,
then low?
+24 V DC at pin
9 of CN1 on
main motor?
Yes
Yes
No
No
Replace engine board
(KP-882). See page 5-11.
Does
pin 7 (MRDYN)
of CN1 on main motor goes
high, then low, within 3 seconds
from pin 8 (MOTORN)
goes low?
Replace main motor. See
page 5-15. If not solved, check
or replace drive unit. See
page 5-16.
Call service
2010
Remove and check
harness (S02773)
between engine board
(KP-882) and main
motor at pins 6 to 9 on
both ends.
Yes
Yes
No
No
Replace harness (S02773)
between engine board
(KP-882)
and main motor.
OK?
Call service
2010