Checking The Photointerrupters - Canon ImageRunner iR8500 Series Service Manual

Chapter 14
Cassette 4 lifter sensor (PS43)
<Connector No.>
J517-A6
<I/O address>
P004-3
<Checks>
Move the detecting lever by hand in standby.
The light-blocking plate is at PS43: 1 (5 V)
The light-blocking plate is not at PS43: 0 (0 V)
<Sensor>
Cassette 4 paper sensor (PS44)
<Connector No.>
J517-A9
<I/O address>
P004-11
<Checks>
Move the detecting lever by hand in standby.
The light-blocking plate is at PS44: 1 (5 V)
The light-blocking plate is not at PS44: 0 (0 V)
<Sensor>
Cassette 4 open/closed sensor (PS45)
<Connector No.>
J517-B2
<I/O address>
P005-7
<Checks>
Move the detecting lever by hand in standby.
The light-blocking plate is at PS45: 1 (5 V)
The light-blocking plate is not at PS45: 0 (0 V)
<Sensor>
Vertical path 1 paper sensor (PS47)
<Connector No.>
J502-B5
<I/O address>
P010-4
<Checks>
Move the detecting lever by hand in standby.
The light-blocking plate is at PS47: 1 (5 V)
The light-blocking plate is not a PS47: 0 (0 V)
<Sensor>
Right lower cover open/closed sensor (PS48)
<Connector No.>
J516-A2
<I/O address>
P005-9
<Checks>
Move the detecting lever by hand in standby.
The light-blocking plate is at PS48: 1 (5 V)
The light-blocking plate is not at PS48: 0 (0 V)
<Sensor>
Vertical path 2 paper sensor (PS49)
<Connector No.>
J516-B9
<I/O address>
P010-5
<Checks>
Move the detecting lever by hand in standby.
The light-blocking plate is at PS49: 1 (5 V)
The light-blocking plate is not at PS49: 0 (0 V)
<Sensor>
Right deck paper level middle sensor (PS51)
<Connector No.>
J513-B9
<I/O address>
P004-4
<Checks>
Move the detecting lever by hand in standby.
The light-blocking plate is at PS51: 1 (5 V)
The light-blocking plate is not at PS51: 0 (0 V)
<Sensor>
Right deck paper level high sensor (PS52)
<Connector No.>
J513-B12
<I/O address>
P004-5
<Checks>
Move the detecting lever by hand in standby.
The light-blocking plate is at PS52: - (5 V)
14-46
The light-blocking plate is not at PS52: - (0 V)
<Sensor>
Left deck paper level middle sensor (PS54)
<Connector No.>
J514-B9
<I/O address>
P004-6
<Checks>
Move the detecting lever by hand in standby.
The light-blocking plate is at PS54: 1 (5 V)
The light-blocking plate is not at PS54: 0 (0 V)
<Sensor>
Left deck paper level high sensor (PS55)
<Connector No.>
J514-B12
<I/O address>
P004-7
<Checks>
Move the detecting lever by hand in standby.
The light-blocking plate is at PS55: - (5 V)
The light-blocking plate is not at PS55: - (0 V)
<Sensor>
Manual feed tray cover open/closed sensor (PS56)
<Connector No.>
J502-A2
<I/O address>
P005-10
<Checks>
Move the detecting lever by hand in standby.
The light-blocking plate is at PS56: 1 (5 V)
The light-blocking plate is not at PS56: 0 (0 V)
<Sensor>
Right upper cover open/closed sensor (PS58)
<Connector No.>
J502-B2
<I/O address>
P005-8
<Checks>
Move the detecting lever by hand in standby.
The light-blocking plate is at PS58: 1 (5 V)
The light-blocking plate is not at PS58: 0 (0 V)
<Sensor>
Toner cartridge cover open/closed sensor (PS59)
<Connector No.>
J512-B2
<I/O address>
P005-12
<Checks>
Move the detecting lever by hand in standby.
The light-blocking plate is at PS59: 1 (5 V)
The light-blocking plate is not at PS59: 0 (0 V)
<Sensor>
Duplex output sensor (PS61)
<Connector No.>
J519-B11
<I/O address>
P002-2
<Checks>
Put paper over the detecting assembly of PS61 in standby.
Paper is put: 1 (5 V)
Paper is removed: 0 (0 V)

14.7.21 Checking the Photointerrupters

The machine's photointerrupters may be checked by a conventional
meter or its service mode:
a. Using a Meter
1) Set the meter range to 30 VDC.
2) Connect the - probe of the meter to GND of the DC controller PCB.
3) Connect the + probe of the meter to the terminals (DC controller
PCB) indicated in the following table.
4) Make checks as instructed.
b. Using Service Mode
1) Start service mode (COPIER>I/O), and check the appropriate
address.
0008-8546