NCR 7870 manual Scanner Troubleshooting Chart

8-2 Chapter 8: Troubleshooting

Scanner Troubleshooting Chart

Problem	Status Indicator	Tone	Possible Cause	Corrective Action
Scanner	Red Off	Off	No power	Check outlet for proper
does not	Green Off			power
operate
Scanner	Red Flashing	Off	Sleep mode	Pass anything in front of
does not	Green Flashing			Motion Detector
operate

Scanner	Red Flashing	Off	Communication
does not			is IBM 468x and
operate			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	Red On	Off	Internal failure 1.	Turn off circuit breaker
does not				to the 7870 then turn
read tags				back on.
			2.	If problem remains,
				have the 7870 repaired.

Scanner	Red On	Off	7870 is not
reads only			communicating
two tags			with host
			terminal

1.Check host terminal for proper operation.

2.Verify the Interface Cable is properly connected.