When The Up And Down Swing Motor Does Not Operate - Samsung APH180HD Service Manual

Troubleshooting

5-3-6 When the up and down swing motor does not operate

1) Trouble cause
1 The disconnection, the wrong connection or the bad contact of the up/down swing motor connection wire
h a r n e s s .
2 Defect by the structural interfere n c e .
3 Defect of the stepping motor.
4 Main PCB defect.
2) Check items
1 Is the connection of wire harness for the up and down swing motor good?
2 Is the normal out wave made durning the motor operation at the main PCB?
3)Sequence of check
Put the up/down adusting plate swing on after the
operation starts.
Does the up/down plate swing correctly?
Is the wire harness not disconnected or wrong connected?
Is the main PCB pin of CN 51, 8, 9, to DC 12V
Is the pulse wave output from the main PCB pin of CN 4, 5, 6, 7 ?
Replace it due to defect of the up/down adjusting motor.
5-8
Y
N
Y
Y
Y
Normal operation of up/down plate motor.
Y
Replace the connection harness.
N
Replace the main PCB.
N
Replace the main PCB.
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