Oki B 4100 Maintenance Manual page 414

A3.2.10 M17 Circuit Diagram (Page 11/17)
1. Block diagram
The circuit diagram shown on page 11/17 consists of the following functions and connectors:
• IC21 (Send motor drive)
• Connector CN5 that provides an interface between M17 board and the send motor.
Figure A3.2.13 shows the related signals of the send motor.
2. Function
1) Send motor rotaion and chopper control
Send motor drive signals are generated by the IEXSEED and output to send motor via IC21
(motor drive IC) of this circuit.
Note: The built-in motor control circuit of IEXSEED consists of the following blocks:
a)
b)
IC20
IEXSEED
40055101TH Rev.4
• Setting of the excitation operation
• Setting of the chopping operation
• Setting of the chopping frequency
• Setting of the motor forward
• Setting of the motor excitation method (1-2/2-1 phase excitation)
Send motor rotaion control
There are several cases of the rotation operation:
Forward rotation for feeding documents.
• Case 1: Feeding document from hopper to the position where one line data is
read.
• Case 2: Feeding document while reading.
• Case 3: Feeding document after a page has been read.
Send motor chopper control
The purpose of chopper control is to reduce the current to the motor by setting the
phase signal on and off intermittently when a time lapse exceeding a specific time
occurs without a phase update.
IC21
PHSA
PHSB
PHSC
PHSD
MPT0 Send motor
drive
MPT1
MPT2
MPT3
(1-2 phase excitation)
Figure A3.2.13 Related Signals of Send Motor
M17
CN5
A1 2
A2 4
B1 1
B2 3
Send motor
M
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