NCR 7883 manual Troubleshooting, Scanner Problems, Scale Problems

NCR RealScan 7883 Installation and Owner Guide

Troubleshooting

For the most part, the function of each of the three units; scanner, scale, and deactivation unit; work independently from each other. However, there are some interactions. Following are some basic things to check if the system is not working properly. You may need to refer to the manufacturer's documentation for each unit.

Scanner Problems

If the scanner does not operate, check the following.

•Power Cable connections.

•Interface Cable connections.

•Red laser light is being generated.

•Spinner mirrors are rotating.

•Diagnostic failures (see Installation Guide).

Scale Problems

If scale is not weighing items properly, check the following.

•Scanner Power Cable connections.

•Scanner Interface Cable connections.

•Scale Cable connection to the RealScan 7883.

•Program RealScan 7883 to enable scale by scanning the following sequence of tags

Programming Mode, Hex 3, Hex 0, Hex 3, Save and Reset.

If the scale is still not weighing items properly, perform the following.

1.Remove all items from the Top Plate.

2.Scan the Reset Scale tag – Scale should read 0.00.

3.Put some weight on the Top Plate – Scale should read some weight (not 0.00).

4.Remove all items from the Top Plate – Scale should read 0.00.

5.Remove the Top Plate.

6.Remove any debris from the scale mechanism or Top Plate posts.

The 7883-1200 will speak providing additional information about the condition of the scale. Insure the following: all cables are connected, power is applied only to the scanner as the scanner provides power to the scale, scale reads 0.00 lb or 0.000 kg upon powerup.

If it suspected that the switch settings for the scale are not correct, below are the settings for the Mettler Toledo 8217 Scale when connected to an NCR RealScan 7883.

With RS-232 cover (bottom of unit) removed the switches are exposed. Looking at the switches with the connector to the RS-232 9-pin DIN connector on your right the two banks of switches should be set as follows (Consult Mettler Toledo 8217 Scale Technical Manual and Parts Catalog) :

Switch on left

Positions 1,6,7,8 Down

Positions 2,3,4,5 Up

Switch on right (next to connector)

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