To Replace Pcb - KERN EMB Service Manual

8 To Replace PCB

1. Disassemble top housing of scale.
2. Disconnect
PL1, SS1 and flat line of keyboard (EMB 220-1, EMB 2200-0, EMB 5.2K5)
PL1, PL2 and PL3 (EMB 500-1, EMB 1200-1, EMB 5.2K1)
PL1, PL2 and JP1 (EMB 200-2, EMB 600-2)
PL1, PL3, JP2, J1 (flat line) and SENSOR (EMB 100-3, EMB 1000-2)
from the PCB. Disassemble the PCB screw.
Replace a new PCB. Assemble the PCB screw and connect the cables and
the flat line again.
3. Perform internal calibration as described in section 4.
4. Assemble the top housing.
5. Check accuracy of scale at different weight.
EMB 200-2
weight tol.
(g) (g)
50.00 0.02
100.00 0.02
150.00 0.02
200.00 0.02
EMB 1200-1
weight tol.
(g) (g)
200.0 0.3
500.0 0.3
1000.0 0.3
1200.0 0.3
EMB 100-3
weight
(g)
10.000
20.000
50.000
70.000
100.000
6. Check other functions, such as Tare and Auto-Off.
10
EMB 600-2
weight tol.
(g) (g)
100.00 0.02
200.00 0.02
400.00 0.04
600.00 0.06
EMB 2200-0
weight tol.
(g) (g)
500 2
1000 2
1500 2
2000 2
tol.
(g)
0.002
0.002
0.003
0.003
0.003
EMB 220-1
weight tol.
(g) (g)
50.0 0.2
100.0 0.2
150.0 0.2
200.0 0.2
EMB 5.2K1
weight tol.
(g) (g)
1000 3
3000 3
5000 3
EMB 1000-2
weight
(g)
100.00
200.00
500.00
700.00
1000.00
EMB 500-1
weight tol.
(g) (g)
100.0 0.3
300.0 0.3
500.0 0.3
EMB 5.2K5
weight tol.
(g) (g)
1000 10
3000 10
5000 10
tol.
(g)
0.02
0.02
0.03
0.03
0.03
EMB-SH-e-0933