Ricoh D177 Service Training page 100

Output Tray Full Detection
 There are two sensors: one for stapling [B], and one for
without stapling [A].
 Paper feed stops when tray full is detected, and the user
must remove the stack from the tray. Then output restarts
automatically.
Slide 100
 Paper output full sensor 1 is located at the center across the main-scan, and
detects the amount of all the output paper.
 On the other hand, when stapling, the height of paper around the stapled area is
higher than other areas. Paper output full sensor 2 (for stapling) is installed in the
stapling area, and is dedicated to detect the amount of stapled output paper.
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Met-C1yz Training