Canon ImageRunner iR8500 Series, Service Manual, Page: 683 / 1122

Chapter 14
14-29
8) Connect the power plug to the power outlet, and turn on the main
power switch.
9) Make the following selections in service mode: COPIER>
FUNCTION> LASER.
10) Select <POWER-A>, and press the OK key.
11) Check to see that the reading of the digital multimeter is 9 to 11 mV,
indicating that the power of the laser A is correct.
12) Select <POWER-B>, and press the OK key.
13) Check to see that the reading of the digital multimeter is 9 to 11 mV,
indicating that the power of the laser B is correct.
14.4.4 Checking the Laser Power
0008-8441
/ iR8070
1) Check to make sure that the Data lamp in the control panel is OFF,
and turn off the main paper switch.
2) Disconnect the power plug from the power outlet.
3) Remove the copyboard glass.
4) Open the laser power check slot cover [1].
F-14-59
5) Shift the switch on the laser power checker (FY9-4008) to '2'.
6) Fit the laser power checker with its light-receiving face [1] as
indicated.
F-14-60
7) Connect the probe of the laser power checker to the digital
multimeter.
F-14-61
8) Connect the power plug to the power outlet, and turn on the main
power switch.
9) Make the following selections in service mode:
COPIER>FUNCTION>LASER.
10) Select 'POWER-A', and press the OK key.
11) See that the reading of the digital multimeter is 9 to 11 mV,
indicating the power of laser A is correct.
12) Select 'POWER-B', and press the OK key.
13) See the the reading of the digital multimeter is 9 to 11 mV,
indicating that the power of laser B is correct.
14.4.5 Checking the Laser Power
0009-1750
iR85+
1) Check to make sure that the Data lamp in the control panel is OFF,
and turn off the main paper switch.
2) Disconnect the power plug from the power outlet.
3) Remove the top cover.
4) Open the laser power check slot cover [1].
F-14-62
5) Shift the switch on the laser power checker (FY9-4008) to '2'.
6) Fit the laser power checker with its light-receiving face [1] as
indicated.
[1]
[1]
[1]