Operation - Intermec ColorCoder V4 Service Manual

2.6 Control Panel, cont'd.
2.6:B Operation
Intermec ColorCoder V4 – Service Manual Ed. 1
LEDs and LCD on the control panel are controlled by the signal
output from the formatter PCB. All of the signals generated by the
switches on the control panel are input to the formatter PCB.
The meaning of each signal is shown below.
D8 ~ D15: Data bus lines used for transmitting the data displayed
CSLED:
CSKEY:
LCDECK: Indicates clock signals on which written-in signal is
WR:
A1:
READY DATA
ERROR
PAUSE
MENU
ON LINE
STOP
FEED
ENTER
Figure 2-58
Chapter 2
with LCD, outputting the ON/OFF signals of LEDs,
and inputting the output signals of the key switches.
Indicates that the signal on the data bus lines is the ON/
OFF signal of LEDs.
Requests the output signal of the key switch to the data
bus line.
about to be sent to LCD controler and read-out signal
is about to be sent from LCD controler.
Indicates that the signal on the data bus line is the write-
in signal to LCD.
Indicates that whether the signal on the data bus line is
the display data or the control signal.
Operation and Timing
Formatter PCB
LCDECK
WR
A1
DC+5V
GND
D8 ~ D15
CSLED
CSKEY
75