Failure Mode Flow Chart - LG LCE3610SB Service Manual

FAILURE MODE FLOW CHART

No power (No display)
Enter POWER ON/OFF Key input
Enter Key input
Some beep
sound?
Yes
Check Voltage - Main PCB CN17 (Pin 1 and 3)
(-)4.5V dc ~
(-)5.5V dc?
Replace the key PCB
END
• Be sure to disconnect power before servicing.
• Wear gloves while servicing.
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Only for training and service purposes
No
No
Yes
CAUTION
Check AC input voltage of main PCB
- Between CN1 and CN2
Replace the Main PCB
- 72 -
1
2
LGE Internal Use Only