14
Replacing the Main PCB
– Before replacing the main PCB, try to read out the data from the main PCB
controller using the service software; if this is successful, you can load the
adjustment data in the controller of the new main PCB once it is installed. In
many cases, this precludes the need to adjust the weighing system.
Quick-test of the A/D Converter
Pin Assignment Chart
No.
Signal designation
Meaning
Voltage
1
BR_POS
Bridge supply voltage (+)
4.5V ± 0.18V
2
SENSE_POS
Sense (+)
Bridge supply voltage
3
OUT_POS
Measuring voltage positive
4
OUT_NEG
Measuring voltage negative
5
SENSE_NEG
Sense (-)
Bridge supply voltage
6
BR_NEG
Bridge supply voltage (-)
–4.5V ± 0.23V
Repairing the Midrics Indicators
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