Safety Switch - Ricoh FT7770 Service Manual

2. safety Switch

There are six safety switches, SW1 to 6, in the sorter stapler. SW1,
3 are for the right door.
top cover.
SW1 and 4 are on a 100 volt ac line.
on a +5 volt line.
These switches are all closed during normal operation. The status when each
switch opens is as follows:
SW1 and 4
The 100 volt ac line is opened, and the sorter stapler motor is turned off.
SW2
+24 volts is not supplied to CN100-1 on the main board, and the following
components are turned off:
1. Gripper Motor
2. Staple Unit Motor
3. Stapler Motor
4. Gripper Solenoid
SW3
+5 volts is not supplied to CN100-5 on the main board, the ICs on the main
board turn off.
Staple Unit HP Sensor
1.
2. Staple Unit Position Sensor
3. Gripper HP Sensor
4. Gripper Forward Sensor
5. Paper Sensor
6. Gripper Motor
7. Staple Unit Motor
8. Stapler Motor
9. Gripper Solenoid
SW5 or 6
CN120-7A or 8A on the main board changes to +5 volts, and the CPU turns off
all moving components (solenoids, motors, etc) except for the stapler motor.
The staple motor stays on until the staple HP sensor is actuated.
SW4 and 5 are for the left door. SW6 is for the
SW5 and 6 are connected with the main board.
Consequently, the following components are turned off:
SW2 is on a +24 volt line and SW3 is
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