Canon DADF-AA1, Service Manual

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Chapter 3
3-2
3.2 Basic Operation
3.2.1 Drive Mechanism and Signals
0024-6984
This machine is a document feeder exclusively for stream reading.
This machine uses one motor and two electromagnetic clutches to pick up and feed document sheets.
This machine uses a release motor to prevent the trailing edge of a document from swaying.
The drive mechanism and signals of this machine are as follows:
F-3-2
[1] ADF driver PCB
[2] Release motor drive signal
[3] Release motor HP detection signal
[4] Document detection signal
[5] Document detection signal
[6] Document detection signal
[7] Pickup/feed motor drive signal
[8] Document detection signal
[9] Document set signal
[10] Pressurization solenoid drive signal
[11] Stamp solenoid drive signal
[12] Last document detection signal
[13] Paper size (width) identification signal 2
[14] Paper size (width) identification signal 1
[15] Paper size (length) identification signal 2
[16] Paper size (length) identification signal 1
Name (symbol) Function
Pickup/feed motor (M1) Feeds documents.
Release motor (M2) Prevents a document from swaying.
Pickup clutch (CL1) Drives the pickup clutch to transmit the power of the pickup/feed motor to the pickup roller unit.
Registration clutch (CL2) Drives the registration clutch to transmit the power of the pickup/feed motor to the registration roller.
Stamp solenoid (SL1) Drives the stamp mechanism.
Pressurization solenoid (SL2) Shifts the delivery lower roller after reversal of the dual-sided document, etc.
[1]
[2]
J12
SR11
SR2 SR1 SR4 SR3 SR5 SR7
PS1
SR8 SR9
J5 J5 J6 J1 J1 J1
J7 J7
J2 J2
SL2 SL1
J3 J3 J3 J3 J4
[3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [15] [16]
M2 M1
CL1 CL2