6-2 Chapter 6: Operation
About Using the Operator Controls
Scan Windows
The NCR 7870 contains a vertical and horizontal scan window. The
vertical scan window is mounted in a Tower Cabinet that rises above
the checkstand surface. The horizontal scan window is flush-mounted
in the Top Plate.
Status Indicators
Status Indicator Function Occurs
Red
(Steady)
Indicates unit is in standby
mode to read next label.
Between scanning.
Green Flashes once to indicate a
successful bar code read.
After scanning.
Yellow Indicates scale has been
reset/zeroed.
Signals a scale error code may
be on display.
When Scale Zero
button is pressed.
Primarily during
Power Up.
Red
(Slow
Flash)
Indicates unit is off-line. Host
terminal may be off or
interface cable is not
connected.
When IBM 468x
communication is
used.
Red-Green
Flashing
Indicates Failure Mode. A
scanner error code will be
repeated.
During Power Up.
Red-Red-
Red
Three red flashes indicate an
item is not on record in price
lookup file.
After scanning an
item.
Red-Green
Alternate
Sleep Mode During operator
inactivity.
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