User Guide

5-3 Flow chart of Troubleshooting and Circuit Diagram
5-2 Initial
Initial Failure
Check and repair the important
signals of U400 as follows
END
No
U302 pin 6 = "H" ?
The node
between R407 and C411
= "H" (RST)
No
Check U106
R411 = "H"
(SIMPWDN_BOOT)
No
Resolder R411
Ye s
R423 = "H"
(GPIO4_MSIZE)
No
Resolder R423
Ye s
R421 = "L"
(GPIO2_EXTPROC)
No
Resolder R421
Ye s
Replace PBA
Check all the other connection
by Test S/W
Check the circuit around LCD
Ye s