CHAPTER 13 TROUBLESHOOTINGCOPYRIGHT © 2002 CANON INC. 2000 CANON iR1600/iR2000 REV.1 JAN. 200213-644.8 Variable Resistors (VR), Light-Emitting Diodes (LED), andCheck PinsOf the VRs, LEDs, and switches found in the machine, those used in the machine are dis-cussed.1. Some of the LEDs emit dim light when they are off because of leakagecurrent; 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:Those VRs and check pins not discussed herein are for use at the factoryonly, and must not be used in the field, as they require special tools andhigh precision.
