COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 11 TROUBLESHOOTING11-148H. Variable Resistors (VR), Light-Emitting Diodes (LED), andCheck Pins by PCBOf the VRs, LEDs, and check pins used in the machine, those needed to service themachine in the field are discussed.Caution:1.Some LEDs are dimly lit because of leakage current even when off; this is anormal condition and should be kept in mind.2. VRs that may be used in the field............VRs that must not be used in the field.....Caution:Those VRs and check pins not discussed herein are for use at the factory, requiringspecial tools and high precision. Do not touch them in the field.1. DC Controller PCBFigure 11-611J101J102J103J104J105J106J107J108J109 J110J111J112J113J114J115J116J117 J118 J119 J121 J122J123J125J126J128J129SW101B12 B1 B9 B15B1 B1 B1 B20 B10 B11 2A1 A12 A1 A9 A20 A1 A1 A1012 11 28 1 9 1A15 A1 A8 A1B1 B15 B1 B8A13 A1B1 B13 B1 B15 B1 B12A15 A1 A12 A1A1 B9A9 B1A1 B11A11 B1A1 B8A8 B1A1 B10A10 B1A1 B9A9 B118B1 A14B14 A1B1 A15B15 A1B1 A13B13 A1B1 A14B14 A1A1 A15J127VR1011 2B1B12A12A1J20011 2J200213J1271 2
