Oki B 4100 Maintenance Manual page 416

A3.2.12 M17 Circuit Diagram (Page 13/17)
1. Block diagram
The circuit diagram shown on page 13/17 consists of the following connectors:
• Connector CN11 that provides an interface between M17 board and the fan motor.
• Connector CN14 that provides an interface between M17 board and the second tray (option).
• Connector CN16 that provides an interface between M17 board and Sub-power unit.
Figure A3.2.15 shows the related signals of the fan motor.
Figure A3.2.16 shows an interface between M17 board and the second tray (option).
2. Function
1) Fan motor control
The fan motor is controlled by the FANON signal generated from IOGA3 under the
temperature control of the heater. The operating status of the fan is supervised by the
FANSNS-N signal.
The fan rotates in the following 3 status:
• Normal mode
• Cover open
• Paper jamming occurring in the paper transport route
2) Second tray (option)
Second tray consists of the following functions:
• Paper capacity
• Paper size
• Paper-size selection
• Cassette/no-cassette selection: Automatic
• Paper/no-paper selection
• Paper route open to facsimile transceiver unit: Automatic decision
Control method:
When second tray is installed on the facsimile transceiver unit, the tray is connected to the
facsimile transceiver unit by a connector. The tray controls by the command from CPU of
PU (printer unit) section.
IC2
IOGA3
40055101TH Rev.4
TR508
FANON
0 V
FANSNS
Figure A3.2.15 Related Signals of Fan Motor
: 500 sheets
: A4, Letter, Legal
: Manual
: Automatic
M17
+24 V
TR20
CN11
FAN motor
1
2
3
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