Ricoh D124-17 Service Manual page 675

No. Component
11 Vertical Motor
12 Vertical Encoder Sensor
13 Main Switch
14 Horizontal Motor
15 Front Cover Track Switch
The vertical motor drives the paper feed rollers and exit
rollers in the main machine. The operation of this motor is
controlled by the vertical encoder sensor and vertical HP
sensor which read the encoded rim of the vertical encoder
wheel.
The rim of the vertical encoder wheel on the left side of the
machine is centered in the gap of this sensor. The sensor
reads the code on the rim of the vertical encoder wheel as it
rotates, to control the operation of the vertical motor during
paper feed.
Switches the machine on/off.
Mounted at the left rear corner of the printer, the horizontal
motor alternately runs forward and reverse to drive the timing
belt that moves the carriage to the left and right during
printing. The operation of the motor is controlled by the
horizontal encoder strip stretched across the width of the
printer and threaded through the horizontal encoder sensor
on the right rear corner of the carriage unit. The sensor reads
this strip as the carriage moves from side to side and uses
these readings to control the operation of the motor.
A push switch mounted on the left post of the main machine
that detects when the pin on the left end of the front cover is
mounted correctly in its track.
Electrical Components
Function
673