Gear Section - Panasonic KX-FP80C Service Manual

When the motor suspends while it is in the receive mode (about 70~80 msec), pin 131 of ASIC
IC501 becomes a low level and Q503 turns OFF. Then Q502 also turns OFF, and instead of +24 V,
+5 V is supplied through D501 so that the motor is held in place. When the system is in the stand-
by mode, all of the motor drive transistors turn OFF. Consequently, the motor current stops.

6.4.6. GEAR SECTION

This model provides a motor-driven gear mechanism for transmitting/copying documents and
printing fax data. In this chapter, you will see how the gears work to select and operate a mode
and how the gear section, sensors and rollers mechanically work during the main operations
(FAX transmission, FAX reception and Copy).
6.4.6.1. MODE SELECTION (See Fig. 1)
When a motor with Drive Motor Gear attached rotates counterclockwise (CCW), Swing Gear C
engages CAM Gear to rotate counterclockwise (CCW). This operation provide four mode options
(A: Transmit mode, B: Paper-Pickup mode, C: Receive mode and D: Copy mode) selected by the
Sensor Switch. (The Sensor Switch Lever's position in the CAM Gear controlled by the software
selects a specific mode.) You can see which mode is selected by confirming the Mode Marker's
position as shown in / Fig. 1-a~1-d.
(Ex. If the Mode Marker is in position A, a transmit mode is selected.)
Note:
The arrows show the directions in which the active gears turn around.
Fig. 1: Mode Selection
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