Controlling The Inlet Flappers - Sharp AR-F15 Service Manual

B.

Controlling the Inlet Flappers

1. Outline
The two flappers mounted at the paper inlet are operated to configure the feed path according to
the size of paper. The flappers are used to enable the following:
1. To detect the passage of the trailing edge of the paper being moved by an appropriate sensor.
2. To prevent the following sheet from butting against the top of the existing stack,
Table 3-301 shows the relationship between sensors and paper sizes.
Sensor
No.1 paper sensor (PI18S)
No.2 paper sensor (PI19S)
No.3 paper sensor (PI20S)
Each flapper is driven by its own solenoid.
Table 3-302 shows the relationship between solenoids and paper sizes.
Solenoid
No.1 paper deflecting
solenoid (SL1S)
No.2 paper deflecting
solenoid (SL2S)
CHAPTER 3 SADDLE STITCH UNIT BASIC OPERATION
A3/LD
Used
Not used
Not used
Table 3-301
A3/LD
OFF
OFF
Table 3-302
B4 A4-R/LT-R
Used Used
Used Used
Not used Used
B4 A4-R/LT-R
ON ON
OFF ON
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