False "Close Left Cover; Defective Waste Toner Box Detecting - Kyocera FS-1900 Service Manual

(3) False "Close left cover"

(4) Defective waste toner box detecting

Problem
Although new waste
toner box is
installed, Check
waste toner
box is displayed.
Although waste toner
bottle is not installed,
Ready is displayed.
FS-1900
False "Close
left cover"
Measure voltage #6, #7
and #8 pins of YC203 on
engine board (KP-864).
When
Side cover
close scurely, Do pins
#5, #6 and #7 voltage
change 0 to 24 V
DC?
Yes
Replace engine board
(KP-864). See page 5-22.
Suggested causes
Defective waste toner full sensor [board] (KP-
766) or waste toner sensor (receiver).
Deformed pins of connector (YC702) on the
sensor board (KP-574).
Defective engine board (KP-864).
No
Replace sensor board
(KP-754). See page 5-26.
6-24
Corrective action
Replace drum unit. See
page 5-12.
Check and straighten pins
of connector (YC702) on
the sensor board (KP-
574).
Replace engine board
(KP-864).