COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001CHAPTER 6 TROUBLESHOOTING6-432.7 Items Related to Electrical Components2.7.1 Electrical Components Requiring Work After Replacement2.7.2 Points to Note when Replacing the CCD Unit1) Check to make sure that the Execute/Memory lamp in the control panel is OFF, and turnoff 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. Besure to disconnect the power plug.3) Replace the CCD unit.4) After assembling the machine, connect the power plug to the power outlet, and turn onthe main power switch.5) Execute the following service modes in sequence:1. COPIER>FUNCTION>CCD>CCD-ADJ2. CCD edge gain correction position auto adjustment:COPIER>FUNCTION>CCD>EGGN-POS (iR7200)3. COPIER>FUNCTION>CCD>LUT-ADJ (iR8500)6) See that all items of COPIER>ADJUST>CCD and all data ofCOPIER>ADJUST>LAMP>L-DATA (iR8500 only) are updated. Record the results onthe service label.7) Turn off and then on the main power switch.Part nameStandard white plateScanning lampCCD unitReader controller PCBMain controller PCBHDD unitDC controller PCBHigh-voltage DC PCBLaser unitPotential sensor/potential control PCBWork referenceP. 6-43P. 6-44P. 6-44P. 6-46P. 6-47P. 6-47P. 6-48P. 6-49P. 6-50P. 6-50
