Symptoms, Diagnosis And Actions - Samsung DV50K Series Service Manual

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4-4. SYMPTOMS, DIAGNOSIS AND ACTIONS

■ The power does not work.
Is the input AC
voltage normal?
Yes
Is the terminal block
connection normal?
Yes
Is the housing
connection normal?
Yes
Is the flat wire
among the main
sub PCBs in good
condition?
Yes
Is the sub PCB
normal?
Yes
The problem is in the main PCB
assembly. Please replace it.
30 _ Troubleshooting
Set the input AC voltage.
(Check AC 120/240V)
No
Directly connect the terminal block.
(Connect in the order of Live 2, Neutral,
No
Live 1)
Connect the housing.
(Check 120V for AC power)
No
Check the flat wire.
No
Replace the sub PCB.
(Check DC power, signal and key)
No
Neutral
L2 L1
Earth
120V 240V
Neutral
L2 L1
Earth