LG Electronics WD-1042FH, WD-1042F(H)(B) Fault Diagnosis and Troubleshooting, No Power

9-2. FAULT DIAGNOSIS AND TROUBLESHOOTING

■WD-1223(5)F(H)(B)/WD-1243(5)F(H)(B) / WD-1041(3)F(H)B / WD-102(4)1(5)F(H)B / WD-803(4)0F(H)B

CAUTION

1.Be careful of electric shock or disconnecting the parts while troubleshooting.

2.First of all, check the connection of each part terminal with wiring diagram.

3.Voltage of each terminal is AC 220-240V while applying an electric current. (except secondary part of the transformer and sensor pressure)

(1)

<PWB ASSEMBLY (MAIN)>

(2)

(6)

(5)

<PWB ASSEMBLY (MAIN)>

NO POWER

When measuring the voltage of the outlet, is the voltage 220-240V~?

YES

Is the LED (1) on?

YES

When measuring the voltage of natural connector (5,6) is the voltage DC 10~16.5V?

YES

Is connector (2) disconnected or disassembled?

NO

Is wire of the PWB assembly (Display) disconnected?

NO

Replace PWB assembly (Display) (6871FC2272D)

NO

NO

NO

YES

YES

Check the fuse?

Replace PWB assembly (Main).

Replace PWB assembly

(Main).

Reconnect the PWB assembly (Display).

Reconnect the PWB assembly (Display).

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