Oki B4100 - Manual (Page 418)

40055101TH Rev.4 418 /
A3.2.13 M17 Circuit Diagram (Page 14/17)
1. Block diagram
The circuit diagram shown on page 14/17 consists of the following connector:
•
Connector CN1 that provides an interface between M17 board and main power supply unit.
2. Function
1) Sensors and switch control
Six types of sensors are used in the printer as listed below. All of their output enter IOGA3
ports for referring to and processing by the CPU.
Figure A3.2.17 shows sensors and switch control.
• Inlet sensor 1 and 2
• Write sensor (To detect the paper top position for printing)
• Outlet sensor
• Paper end sensor
• Toner end sensor
• Cover status switch
The functions of various sensors are described in the following table.
Sensor Type
PSIN-N
PSIN2-N
Inlet sensor
Inlet sensor 2 This photosensor is positioned before the resist roller to detect whether the paper
has entered into the printer section.
Sensor Name Function
WRSNS-N Write sensor Detects the arrival of paper at designated position on the paper transport route
inside the printer in order to turn on the light of the LED head.
0: Paper exists, 1: Paper does not exist
PSOUT-N Outlet sensor Located at the exit of the printer to supervise the paper exit operation.
0: Paper exists, 1: Paper does not exist
PAPER-N Paper sensor Detects the presence of paper in the paper cassette.
0: Paper exists, 1: Paper does not exist
TNRSNS-N Toner sensor Detects the remaining toner in the toner cartrige.
"The length of time of low-toner state within fixed time interval" detects a
low-toner state.
CVOPN-N Cover open
sensor Detects whether the cover of the printer section is open or not.
0: Cover is open, 1: Cover is close