KERN AEJ Service Manual

Also see for KERN AEJ: Operation manual

4.2 Troubleshooting TableSYMPTOMS CAUSES & REMEDYNo display lights on. 1. HT-DP board is defective.2. AC adaptor is defective.3. Inner connecting cord is not properly connected.[ u - Err ] or [ o - Err ] appearson the display.1. Wrong weighing pan is applied.2. Tuning-fork sensor or mechanical unit isdefective.3. HT-DP board is defective.4. Setting of address data has mistake.5. Coefficient memories (address data) havechanged by noise or static electricity. Re-set theaddress data and/or adjust the linearity.Display does not get settled down.Display does not repeat correctly.Zero point drifts.1. Some parts such as stopper touch others.2. Weighing pan touch other parts.3. Foreign substances are in the scale.4. Tuning-fork sensor or mechanical unit isdefective.5. Affected by wind or disturbing oscillation.[ o - Err ] appears with net load lessthan full capacity.1. Gross weight applied to the scale pan (net weight+ tare value) exceeds the scale capacity.2. Setting of address data has mistake.3. Coefficient memories (address data) havechanged by noise or static electricity. Re-set theaddress data and/or adjust the linearity.4. Wrong external weight is used in the spancalibration.Span error is too much. 1. Tuning-fork sensor or mechanical unit isdefective.2. HT-DP board is defective.3. Setting of address data has mistake.4. Coefficient memories (address data) havechanged by noise or static electricity. Re-set theaddress data and/or adjust the linearity.Non-linearity is too much. 1. Tuning-fork sensor or mechanical unit isdefective.2. Setting of address data has mistake.3. Coefficient memories (address data) havechanged by noises or static electricity. Re-set theaddress data and/or adjust the linearity.4. Wrong external weight is used in spancalibration.8