Canon IR3300, IR2800, IR2200 manual 78 T

CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS

6.7 Variable Resistors (VR), Light-Emitting Diodes, and Check Pins by PCB

Of the variable resistors, light-emitting diodes, and switches used in the machine, those needed for service work in the field are discussed:

1.Some LEDs emit dim light when they are off because of leakage cur- rent; this is a normal condition, and must be kept in mind.

2.VRs that may be used in the field:

VRs that must not be used in the field:

Do not touch those VRs and check pins not discussed herein; they are for exclusive use in the factory, and require high accuracy and special instru- ments.

4-78 T COPYRIGHT © 2001 CANON INC. CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001