Display Aps Data (Sp4-301-1); Reading The Data - Ricoh B121 Service Manual

DISPLAY APS DATA (SP4-301-1)

Sensor Positions
The APS (auto paper select) sensors are
arranged as shown in the diagram.

Reading the Data

Paper Size : 11000000 8
DF Open : 1
Example 1
Example 1 indicates that the paper size and its orientation is "8
that the document feeder (or platen cover) is open. Example 2 indicates that the
paper size and its orientation is "A4 LEF," and that the document feeder (or platen
cover) is closed.
The "Paper Size" data starts with eight digits. The first digit indicates the output of
L2; the second digit, L1; the third digit, W2; and the fourth digit, W1. The other four
digits (from the fifth through the eighth) are always "0000." In Example 1, the APS
sensors L2 and L1 detect paper (W2 and W1 do not). In Example 2, APS sensors
W2 and W1 detect paper (L2 and L1 do not). The paper size and its orientation is
based on the outputs of these four APS sensors.
The "DF Open" data shows "1" or "0,"
indicating if the document feeder (or
platen cover) is open or closed
respectively. The data is based on the
output of the platen cover sensor [A].
SM
Paper Size : 00110000 A4 
x13 
1/2
DF Open
5-75
SERVICE PROGRAM MODE
L1
W1
W2
: 0
Example 2
x 13 SEF," and
1/2
[A]
B121 Series/B259 Series
L2
B121S919.WMF
B121S920.WMF