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5-7 TEST POINT DIAGRAM OF FILTER BOARD
MR-E55R-C
MR-E60R-C
CN1
110V AC
5-8 TEST POINT DIAGRAM OF CONTROL BOARD
MR-E55R-C
MR-E60R-C
280~340V DC
CN1A
1
110V AC
3
5
Ice tray heater
7
Tank heater
CN2A
1 Rotational heater board
3 Water pipe heater
5 Vegetable compartment heater
7 Defrost heater 2 (for evaporator pipe)
9 Defrost heater 1 (for Glass tube heater)
+12V~14V DC
(Refrigerator
control circuit)
CN4D
8
7
6
5
4
3
2
1
3
1
The capacitor that is used for the inverter is charged to 330V DC,
so electric charge remains for a while even after power off.
Therefore, an electric shock may occur if the charging portion is
touched by hand.
Short-circuiting between J91C and J92 for 20 seconds or longer
with a tool such as a flat-blade screwdriver allows the capacitor to
discharge safely. When replacement of the control board follows,
be sure to perform this operation.
After discharge, measure between the C91C terminals + and –
with a tester. Before inspection, be sure to check that the voltage
is 10V DC or lower.
CN5D
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Compulsory
defrosting by
short circuit
CN7M
CN10K
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15 16 17
18
42
CN50G
Compressor
+5V DC
(Refrigerator
control board)
CN9S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
+5V DC
(Inverter circuit)
+12~20V DC
(Inverter circuit)
CN61L
2
1
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Troubleshooting
