Kyocera Mita FS-1900, Service Manual

Page: 175 / 224

6-25
FS-1900
(5) Defective paper jam detecting
(6) Defective paper gauge sensing
(7) Defective paper size detecting
Problem Suggested causes Corrective action
False paper gauge
indication.
Surface of the paper gauge sensor 1 (PH702)
and 2 (PH703) on the sensor board (KP-754)
are dirty with paper particles.
A piece of paper torn from a sheet is caught
around paper gauge sensor 1 (PH702) and 2
(PH703) on the paper sensor board (KP-754).
Reflecting mirror has come off the actuator of
paper gauge sensor 1 (PH702) and 2 (PH703).
Defective paper gauge sensor 1 (PH702) and 2
(PH703) on the sensor board (KP-754).
Defective engine board (KP-864).
Clean with cloth.
C h e c k v i s u a l l y a n d
remove it, if any.
C h e c k v i s u a l l y a n d
remove it, if any.
Replace sensor board
(KP-574). See page 5-26.
Replace engine board
(KP-864). See page 5-22.
Problem Suggested causes Corrective action
False paper size
message display. Defective paper size switch.
Defective sensor board (KP-754).
Defective engine board (KP-864).
Replace paper size switch.
Replace sensor board
(KP-574). See page 5-26.
Replace engine board
(KP-864). See page 5-22.
Problem Suggested causes Corrective action
Paper jam frequently
occurs.
False paper jam
message display.
Surface of the registration sensor (PH701) is
dirty with paper particles.
Actuators of registration sensor (PH701) or
exit sensor does not operate smoothly.
Defective sensor board (KP-574), fuser board
(KP-756) or engine board (KP-864).
A piece of paper torn from a sheet is caught
around actuator of registration sensor or exit
sensor.
Clean with cloth.
Repair or replace.
Replace sensor board
(KP-754), fuser board
(KP-756), or engine board
(KP-864). See page 5-26
and 5-22.
C h e c k v i s u a l l y a n d
remove it, if any.