10-68 Phaser 7750 Printer Service Manual
Toner Dispense Control
+5VDC
+5VDC
+5VDC
+5VDC
DC COM
DC COM
DC COM
DC COM
+24VDC
INTLK
+24VDC
INTLK
+24VDC INTLK
+24VDC INTLK
+24VDC
INTLK
+24VDC
INTLK
P/J410
17
77
76
75
MCU PWB
PL13.1
I/F PWB
PL9.1
A1
A2
A3
A4
A5
A6
A7
A8
J533 J277
J228
J229
BLU
BLU
BLU
BLU
+24VDC INTLK
BLU
BLU
J230
+24VDC INTLK
BLU
BLU
TONER
DISPENSE
MOTOR (Y)
PL6.1
2
1
MOT
TONER
DISPENSE
MOTOR (M)
PL6.1
2
1
MOT
TONER
DISPENSE
MOTOR (C)
PL6.1
2
1
MOT
TONER
DISPENSE
MOTOR (K)
PL6.1
2
1
MOT
DC330 [009-001] (5s)
TONER DISPENSE
MOTOR (Y)
ON (L) +24VDC
2
DC330 [009-002] (5s)
TONER DISPENSE
MOTOR (M)
ON (L) +24VDC
2
DC330 [009-003] (5s)
TONER DISPENSE
MOTOR (C)
ON (L) +24VDC
2
DC330 [009-004] (5s)
TONER DISPENSE
MOTOR (K)
ON (L) +24VDC
2
1 2
1
9.15 TONER DISPENSE CONTROL
DISPENSED
BLACK TONER
DISPENSED
CYAN TONER
DISPENSED
MAGENTA TONER
DISPENSED
YELLOW
TONER
9.13
9.12
9.11
9.10
This model has no Low Toner Sensor.
Low Toner/Toner Empty is detected by ATC Sensor-sensed
Toner Concentration in Deve Assy and ICDC Control. For the
ATC Sensor wiring, see CH9-9.13.
Toner Density Control
ICDC Control estimates toner consumption qty for Dispense Control.
Dispense Qty is corrected according to ATC Sensor-sensed Toner
Concentration in Deve Assy.
Toner Empty Detection
When ATC Sensor-sensed Toner Concentration in Deve Assy reduces
below the spec, Low Toner is detected.
When a total ICDC value exceeds the spec after the detection of Low
Toner, Toner Empty is detected.
NOTE:
Never repeat turning on DC330 [009-001] - [009-004]
Turning on Toner Dispense Motor repeatedly causes toner
blocking in Deve Assy.
7750-306
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