NCR RealScan 7875-7000/8000 Installation Guide 
AIP-00342    Release B  06/03 
35 of 56
Correcting Scanner Problems 
 
Problem 
Status 
Indicator 
 
Tone 
Possible Cause  Corrective Action 
Scanner does not 
operate 
Red Off 
Green Off 
Off  No power to  the 
unit 
Check electrical outlet for 
proper power. 
Scanner does not 
operate 
Red 
Flashing 
Green 
Flashing 
Off  Sleep mode  Pass anything in front of 
the Motion Detector. 
Scanner does not 
operate 
Red 
Flashing 
Green Off 
Off Communications is 
IBM 468x and 
scanner is off-line 
•  Verify that the IBM 
terminal is turned on. 
•  Verify that the IBM 
terminal is 
recognizing the 
RealScan 7875. 
•  Verify that the 
Interface Cable is 
properly connected. 
Scanner does not 
read tags 
Red 
Flashing 
Green Off 
Off  Internal failure  Remove power from the 
RealScan 7875 and then 
supply power again. If the 
problem is not corrected, 
have scanner repaired. 
Scanner reads 
only two tags 
Red On 
Green Off 
Off  RealScan 7875 not 
communicating with 
host terminal 
•  Verify that the 
Interface Cable is 
properly connected. 
•  Remove power from 
the RealScan 7875 
and then supply 
power again. If the 
problem is not 
corrected, have 
scanner or host 
terminal repaired.