I. CONTROL PANELA. OutlineThe copier’s control panel consists of the control panel controller PCB, 320 × 240-dot liquid crystal display panel unit, transparent touch switch panel, and key switchpanel, and it provides the following functions:q Data communicationw LCD processinge LCD contrast automatic adjustment and manual adjustmentr Touch switch inputt Key switch inputB. Operation1. Data CommunicationThe control panel controller PCB exchanges data with the copier’s image processorPCB through an interface unit in serial.The microprocessor on the control panel controller PCB serves to control such datacommunications.Figure 7-101LCD panel Input key, VR911,Indicator LEDControl panel controller PCBDC controller PCBDisplaymemoryLCDcontrollerInterfaceunitCOPYRIGHT © 1997 CANON INC. CANON NP6045 REV. 1 MAR. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS7-1
