Chapter 1515-2815.2.9 Variable Resistors (VR), Light-Emitting Diodes (LED), and Check Pins by PCB15.2.9.1 Variable Resistors (VR), Light-Emitting Diodes (LED), and Check Pins by PCB 0010-9886iR7105 / iR7095 / iR7086Of the variable VRs, LEDs, and switches used in the machine, those needed when servicing in the field are discussed.1. Some LEDs emit dim light even when OFF because of leakage current; 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 the VRs and check pins not discussed herein. They are exclusively for use at the factory, and require special tools and high precision.15.2.9.2 Main controller PCB 0010-9887iR7105 / iR7095 / iR7086F-15-2415.2.9.3 Main controller PCB (up graded version) 0018-0391iR7105 / iR7095 / iR7086 / iR7095PNotation Condition of activationLED2 after bootingLED6 while +3.3 V (non-all night) is being suppliedLED7 while +3.3 V (non-all night) is being suppliedLED8 while +5 V (non-all night) is being suppliedLED9 while +3.3 V (all night) is being suppliedLED10 while in sleep mode (sleep 3)J1015J1004J1006J1027J1010J1021J1023BAT1001J1022J1024 J1060J1040J1014J1026J1061J1013J1016J1017J1028J1003J1062J1043J1041J1042LED8LED9LED2