5-2 Initial
Initial Failure
Check and repair the important
signals of U400 as follows
END
No
U302 pin 6 = "H" ?
The node
between R401 and C404
= "H" (RST)
No
Check U103
R409 = "H"
(SIMPWDN_BOOT)
No
Resolder R409
Yes
R428 = "H"
(GPIO4_MSIZE)
No
Resolder R428
Yes
R429 = "L"
(GPIO2_EXTPROC)
No
Resolder R429
Yes
Replace PBA
Check all the other connection
by Test S/W
Check the circuit around LCD
Check the circuit
around U401(EEPROM)
and data stored in it
Yes
5-3
Exploded Views and Parts List