Read LG GK712EN Service Manual online
25
9-2. FAULT DIAGNOSIS AND TROUBLESHOOTING
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 between each terminal is 220-240V while applying an electric current.
CAUTION
NO
NO
NO
YES
YES
YES
YES
NO
NO
YES
(1)
(2)
(5)
(6)
PWB ASSEMBLY (MAIN)
PWB ASSEMBLY (MAIN)
Check the fuse?
Replace PWB assembly
(Main).
(Main).
Replace PWB assembly
(Main).
(Main).
Reconnect the PWB
assembly (Display).
assembly (Display).
Reconnect the PWB
assembly (Display).
assembly (Display).
When measuring the voltage of the outlet,
is the voltage AC 220-240V?
Is the LED (1) on?
When measuring the voltage of natural
connector (5,6) is the voltage DC 10~16.5V?
Is connector (2) disconnected or
disassembled?
Is wire of the PWB assembly (Display)
disconnected?
Replace PWB assembly (Display).
NO POWER
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GK708EN / GK710EN / GK712E / GK712EN
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