Chapter 7 Externals/Auxiliary Mechanisms; Control Panel; Outline; Operation - Canon NP6251 Service Manual

I. CONTROL PANEL
A. Outline
The machine's control panel consists of the control panel controller PCB, 320
dot liquid crystal display panel unit, transparent touch panel, and key switch panel, and
it has the following functions:

Data communication

LCD processing
LCD contrast automatic and manual adjustment
Touch switch input
Key switch input
B. Operation
1. Data Communication
The control panel controller PCB communicates with the copier's image processor
PCB through an interface unit to exchange data in serial mode.
The communication is controlled by the microprocessor on the control panel
controller PCB.
COPYRIGHT © 1997 CANON INC.
Input key, VR911,
LCD panel
Control panel controller PCB
LCD
Display
controller
memory
DC controller PCB
Figure 7-101
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS

display LED
Interface
unit
240-
7-1