Lcd - LG -E450 Service Manual

4.14 LCD

The LCD control signals are generated by MT6329. It needs three external powers like VIO, VCI and IO. And its interface is MIPI
having three data lanes and one clock lane.
Change the LCD Module
LGE Internal Use Only
Press PWR key
turn the power ON
Is the circuit Powered ?
Disconnect and re-connect
LCD Connector(CN400)
LCD display is OK ?
Check LCD Power
+3V0_LCD_VCI_MTK(TP1),
Yes
+1V8_LCD_VIO_MTK(TP2),
MIPI_CLK (TP3),
MIPI_DATA (TP4)
LM3639(U404) output LEDA(TP5)
Change the Main Board
The LCD works
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4. TROUBLE SHOOTING
START
No
Yes
No
No
END
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Follow the Power ON
Troubleshooting
Yes
Only for training and service purposes