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When the motor is OFF, gate array IC1 pin 153 becomes a low level and Q14 and Q7 also turns
OFF. Instead of +24V, +5V is supplied through D2 so that the motor is held in place.
5.4.6. GEAR SECTION
This section shows how the motor-driven gear mechanism works in the main operations: FAX
transmission, FAX reception the motor and copying.
5.4.6.1. MODE SELECTION
When the motor attached to the Drive Motor Gear rotates counterclockwise (CCW), Swing Gear
A-2 engages the CAM and the CAM turns counterclockwise to select a mode. (See Fig. A.) There
are three mode options controlled by the Switch: A: Transmitmode, B: Receive mode and C:
Copy mode. In Fig. B, you can see which mode is selected by the position of the rib in the CAM.
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