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CHAPTER 2 FUNCTIONS & OPERATION
VII. PARTS LAYOUT ON EACH PCB
1. Control PCB
Figure 2-701
Connector Details
J102 – AC adapter
J103 – USB interface
J105 13P Document sensor PCB,
etc.
J108 5P Main motor
J109 6P Feed motor
J110 20P CIS unit (back)
J111 20P CIS unit (front)
J112 10P Operation PCB
Table 2-701
Symbol Details
PS1 Flapper sensor
PS2 Door sensor
SR1 Ultrasonic sensor (receiver)
LED11 Back: Document sensor
(transmitter)
LED9/Q39 Pre-registration sensor
LED8/Q38 Post-registration sensor
LED4/Q12 Eject sensor
Blinking 1 (slowly)
ON: 500 msec, OFF: 500 msec
(1 time/second)
→
CPU operation/DC power good
Blinking 2 (quickly)
ON: 250 msec, OFF: 250 msec
(2 time/second)
→ Firmware fault
LED2
Blinking 3 (intermittently)
(ON: 125 msec, OFF: 125 msec)
× 4 times, OFF: 1 sec
→ EPROM fault
Table 2-702
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CANON ELECTRONICS INC. 2011 CANON DR-M140 FIRST EDITION
2-19