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The solenoid drive circuit controls Register Solenoid, Pick up Solenoid and Bin Change Solenoid.
The solenoids are designed to be driven by +24V.
The diodes protect transistors from reverse generated voltage when solenoids are turned off.

REGISTER

PICKUP

BIN CHANGE

MODE

IC600_H1

Solenoid ON

High level

Solenoid OFF

Low level

MODE

IC600_R3

Solenoid ON

High level

Solenoid OFF

Low level

MODE

IC600_J3

Solenoid ON

High level

Solenoid OFF

Low level

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51

52

All of the sensor and switches are shown below.

See TEST FUNCTIONS - SENSOR CHECK SECTION for the sensor test.
 (#815 of Service Mode test. Refer to TEST FUNCTIONS (P.94).

This Switch detects whether the DRUM unit is set or not. 
When there is the unit, the input signal of IC600-M18pin becomes low level. 
When there is not the unit, the input signal of IC600-M18pin becomes high level. 

Sensor Name

Sensor Location

Reference number

Message Error

Drum sensor

Sensor PCB

SW2

[CHECK DRUM]

Paper sensor

Sensor PCB

SW3

[OUT OF PAPER INPUT TRAY #1]

Pickup sensor

Sensor PCB

SW4

Exit sensor

Thermistor PCB

PS5

[PAPER JAMMED]

Home sensor

FB Transit PCB

PS51

[CARRIAGE ERROR]

Read position sensor

Sensor PCB

PS2

[CHECK DOCUMENT]

Registration & Manual paper sen-
sor

Sensor PCB

PS4

[PAPER JAMMED]

Print timing sensor

Sensor PCB

PS3

[PAPER JAMMED]

Document sensor

Sensor PCB

PS1

-

ADF cover sensor

Sensor PCB

SW1

[CLOSE ADF COVER]

Top cover sensor

H.V.P.S

SW1

[TOP COVER OPEN]

Toner sensor

Sensor PCB

IC40

[TONER EMPTY]
[TONER LOW]
[CHECK DRUM]

Option handset hook switch

Op handset PCB

SW940

-

Signal (IC600-M18pin)

Drum Set

Low level

No Drum

High level