NCR 7870 User Manual

Scanner
does not
operate

Red Off
Green Off

Off

No power

Check outlet for proper
power

Scanner
does not
operate

Red Flashing
Green Flashing

Off

Sleep mode

Pass anything in front of
Motion Detector

Scanner
does not
operate

Red Flashing

Off

Communication
is IBM 468x and
scanner is off-
line

Host terminal
has sent a
“disable
scanner”
command

1.

 

Verify the IBM terminal
is off.

2.

 

Verify the IBM terminal
is recognizing the 7870.

3.

 

Verify the Interface
Cable is properly
connected.

Scanner
does not
read tags

Red On

Off

Internal failure

1.

 

Turn off circuit breaker
to the 7870 then turn
back on.

2.

 

If problem remains,
have the 7870 repaired.

Scanner
reads only
two tags

Red On

Off

7870 is not
communicating
with host
terminal

1.

 

Check host terminal for
proper operation.

2.

 

Verify the Interface
Cable is properly
connected.