Avery Weigh-Tronix 7821 - Page 29

7821 User Instructions 29
7.1 Troubleshooting
Display shows center - - - - - dashes
(Indicates that the scale is outside zero capacity of ±2%.)
1. Verify that weigh platter is on the scale.
2. Press the ZERO key.
3. Power down, then power up the scale.
4. Recalibrate the scale.
Display shows upper
_ _ _ _
dashes
(Indicates the scale is over capacity.)
1. Remove all items from the scale.
2. Press the ZERO key.
3. Power down, then power up the scale.
4. Recalibrate the scale.
Scale is not transmitting data to the host device
1. Check cable connection at both the rear of the scale and the host device.
2. Check communication setting and baud rate on both scale and software.
3. Perform I/O loopback test.
4. Replace the main PC board.
The ZERO key and the UNITS key do not function
1. Replace the display panel.
2. Replace the display PCB.
3. Replace the main PCB.