Canon iR8500 Service Manual page 721

SERVICE MODE
COPIER>FUNCTION
<LASER>
Use it to adjust laser-related items.
POWER-A
Use it to turn on laser A.
<Using the Mode>
1) Select <POWER-A> to highlight, and press the OK key.
2) The laser goes ON. See that the display changes from 'START' to 'AC-
3) The laser goes OFF automatically in about 60 sec. See that the display
POWER-B
Use it to turn on laser B.
<Using the Mode>
1) See the descriptions for 'POWER-A'.
<DPC>
Use it to adjust potential sensor-related items.
OFST
Use it to adjust the offset for the potential sensor.
<Using the Mode>
1) Select the item, and press the OK key.
2) See that the machine automatically stops after adjusting the offset.
S-78
TIVE' (flashing), and <SERVICE> appears in the upper right of the
screen.
shows 'OK!'.
This mode is part of the series of procedures to perform when replac-
ing the potential sensor unit. Do not use this mode on its own (See
Chapter 6 "Troubleshooting">2.7.10 "Points to Note When Replac-
ing the Potential Sensor/Potential Control PCB").
COPYRIGHT© 2001 CANON INC. 2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001