Canon iR2200 Service Manual page 546

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-
2. VRs that may 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.
rent; this is a normal condition, and must be kept in mind.
VRs that must not be used in the field:
2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001