Kyocera FS-1920 Service Manual page 73

Problem
(7) Defective face Improper insertion of the
up/down solenoid face up/down solenoid
operating. connector into fuser board
• Change guide
(KP-1069).
does not operate
Broken face up/down sole-
in the fuser unit.
noid coil or blown-out fuse
(ICP831) on the fuser
board (KP-1069).
Defective engine board
(KP-1081) or power supply
unit.
(8) False "Close pa-
per transfer unit".
(9) False "Close top
cover".
Causes
START
Measure voltage #12
pin of YC701 on sensor
board (KP-1077).
When
paper feed unit
close securely, does pin
#12 voltage change
0 to 24 V
DC?
Yes
Replace sensor board
(KP-1077). See page 1-
6-24.
START
Measure logic level #11
pin of YC701 on sensor
board (KP-1077).
Check procedures/corrective measures
Reinsert the connector.
Remove and then check for continuity across the face up/down
solenoid connector terminals; pin #1 and pin #2, pin #3 and pin
#2. Remove and check for continuity of fuser board (KP-1069)
connectors terminals; across the pin #2 of connector (YC832)
and pin #2 of connector (YC831). If none, replace the face up/
down solenoid and fuser board (KP-1069) at the same time. Or
replace fuser unit.
See page 1-6-27.
Replace engine board (KP-1081) or power supply unit. See page
1-6-20.
Connect circuit tester to
pin #20 of YC4 on engine
board (KP-1081).
close securely, does pin
No
Replace engine board
(KP-1081). See page 1-
6-20.
When
Top cover
close scurely, does pin
#11 goes low
to high?
Replace engine board
(KP-1081). See page
1-6-20.
When
paper transfer unit
No
#20 voltage change
0 to 24 V
DC?
Yes
Replace sensor board
(KP-1077). See page 1-
6-24.
No
Replace sensor board
(KP-1077). See page
Yes
1-6-24.
2FP/2FY/2FR
1-5-23