When Replacing The Laser Unit; Replacing The Potential Sensor/Potential Control Pcb - Canon iR8500 Servise Manual

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CHAPTER 6 TROUBLESHOOTING

2.7.10 When Replacing the Laser Unit

1) Check to make sure that the Execute/Memory indicator in the control panel is OFF, and

turn off the main power switch.

2) Disconnect the power plug from the power outlet.

The machine remains supplied with power as long as the power plug re-

mains connected to the power outlet. Be sure to disconnect the power plug.

3) Replace the laser unit.

4) Take notes of the settings (LA-DELAY) on the label attached to the new laser unit.

5) After assembling the machine, connect the power plug to the power outlet, and turn on

the main power switch and the control panel power switch.

6) Enter the settings recorded in step 4) in service mode:

COPIER>ADJUST>LASER>LA-DELAY.

1) Check to make sure that the Execute/Memory lamp in the control panel is OFF, and turn

off the main power switch.

2) Disconnect the power plug from the power outlet.

The machine remains supplied with power as long as its power plug is con-

nected to a power outlet even when its main power switch is turned off. Be

sure to disconnect the power plug.

3) Replace the potential sensor/potential control PCB.

The potential sensor and the potential control PCB are adjusted as a pair,

requiring simultaneous replacement.

4) Remove the developing assembly, and slide out the process unit.

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CANON iR8500 REV.0 MAR. 2001