Troubleshooting - KERN GAB 3K1DM Service Manual

4.3 Troubleshooting

Symptom
1. The display check does not
start when the power switch is
pushed.
2. Power ON → Display check →
"Err1"
3. Power ON → Display check →
"Err2"
4. Power ON → Display check →
"0"kg does not appear on the
display.
5. Weight varies at four corners.
6. The ZERO or TARE key does
not function.
7. The power supply cuts when
time passes.
Cause
1. Trouble of dry battery power
supply system
2. AC adaptor trouble
3. Main board trouble
1. Garbled EPROM data or
initialized state.
2. Main board PS-005A trouble • Replace the main board PS-005A.
1. Outside weight value start
range
1. Weight value is unstable.
1. External or load cell trouble
1. Outside of zero-adjustment
or tare subtraction range
2. Weight value is unstable.
1. Auto power OFF setting.
2. Main board PS-005A trouble • Replace the main board PS-005A.
- 29 - GAB/GAS-SH-e-0711
Measure
• Check and replace dry batteries
• Confirmation and exchange of
battery harness
• Check output voltage (DC2.4-6.0V)
and replace AC adaptor
• Replace the main borad PS-005A.
• Initialize, perform C1, and C2 and
C3 settings, then push the memory
switch.
• Check if anything is placed on the
platter. If so, remove it.
• Replace the load cell.
• Replace the main board PS-005A.
• Check if something comes in contact
with the platter. If so, remove it.
• Check if there is wind or vibration
near the machine. If so, avoid these.
• Replace the main board PS-005A.
• Replace the load cell.
• Check if the horizontal state is being
kept.
• Check if there is foreign article
between the platter and the case.
• Check if space of limit adjustment
screw is narrow
• Replace the load cell.
• Check that zero-adjustment or tare
subtraction is within the specified
range.
• Check if something comes in
contact with the platter. If so,
remove it.
• Check if there is wind or vibration
near the machine. If so, avoid
these.
• Replace the main board PS-005A.
• Replace the load cell.
• Check if the auto power OFF
function works.
• Default is 60 minutes.