Control Panel - Canon 1000 Service Manual

2. LCD Display Processing
The CPU on the reader controller PCB sends commands to the LCD controller at such times as
programmed in advance. The LCD controller, on the other hand, interprets and executes these commands.
The LCD controller performs ON/OFF control over the display as programmed.
The LCD controller writes display character codes in the RAM for display memory in sequence; the RAM
data is then displayed on the display panel in response to the timing signal generated by the LCD controller.
3. Adjusting the LCD Contrast
VR5301 is mounted on the control panel relay PCB and may be used to adjust the contrast of the LCD
panel.

Control panel

COPYRIGHT © 2001 CANON INC.
LCD panel (200x640)
Control panel relay PCB
LCD controller
Display memory
RAM
Reader controller PCB
Figure 3-702
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
3. OPERATION AND TIMING
Tenkey/subkey PCB
Pilot lamp PCB
VR5301
CPU
3-193