Milwaukee 2231-20 4-20, Repair Service Instructions

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6. Trouble Shooting
Defective Symptom Possible Cause Recommended remedy
Power does not turn on
Shortage of battery capacitance Replace the batteries.
Contact failure at Battery contact Replace the battery contact.
Inaccurate measurement is
caused.
Shortage of battery capacitance Replace the batteries.
Defect of adjustment Readjustment
Defect of circuit components Replace the PCB.
Defect of circuit sensor module Replace the sensor module.
Display value changes over
20digits at zero point , when
repeating the JAW open and
close,
Defect of circuit sensor module Replace the sensor module.
Lack of the segment, or
abnormal lighting,
Defect of circuit components Replace the PCB.
LCD backlight or LED light is
not lit
Defect of circuit components Replace the PCB.
7. List of Spare parts
No. Spare parts No. Parts Name Qty. Remark
18 9000018895 Lamp Button 2231-20 UL 1 -
17 9000019044 Lamp Button Bracket 2231-20 1 -
2 9000018894 Control Button 2231-20 UL 1 -
1 9000018890 Enclosure-Front Case 2231-20UL 1 -
5,6 122310200A 2231-20 PCB MAIN 1 with LCD and one screw
8 9000018891 Enclosure-Rear Case 2231-20 UL 1 -
11 9000014595 Screw For Bottom Case 6 -
12,13 9000018892 Battery Door 2231-20 UL 1 with two screws
16 122310100A 2231-20 Clamp and Wire 1 with wire clip
3,4 9000018896 Control Button Support 2231-20 1 with two screws
14 9000017226 Battery maxell LR6(GD)E 4PT 2 -