Oki OKIFAX4550 Maintenance Manual page 345

R46
CN6 CN1
+5V
IC2
+5V
CVOPN-N
IOGA6
WRSNS-N
PSOUT-N
PSIN-N
TRSNS-N
TONER FULL state
TNRSNS-N
TONER LOW state
TNRSNS-N
• When the Toner Low state is detected 2 times consecutively, Toner Low is established.
• When the Toner Full state is detected 2 times consecutively, Toner Low is cancelled.
• When there is no change with the toner sensor for 2 cycles (2.51 sec. × 2) or more, then
the Toner Sensor Alarm is activated.
• The toner sensor is not monitored while the main (drum) motor is in a halt.
41309401TH Rev.4
P2H
15 9
17 7
23 1
CVOPN-N
COVER open switch
8 Write sensor
16
WRSNS
1 Outlet sensor
23
PSOUT
5 Inlet sensor
19
PSIN
21 3
TNR5N5
Toner end sensor
PS1
1
3
2
4
Figure A.28 (1/4) Sensor and Switch Control
2.51 sec.
2.51 sec.
Figure A.28 (2/4) Method of Toner Low Detection
5V
PS2 PS3
1 1
3
2 2
4
280 ms < t1 < 630 ms
t1
t1 > 630 ms
t1
PS4
1
3
3
2
4
4
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