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5-2 Initial
Initial Failure
U401 pin 4 = "H" ?
Yes
Check all the other connection
by Test S/W
Check the circuit around LCD
Check the circuit
around U504(EEPROM)
and data stored in it
END
Flow chart of trouble shooting
No
Check and repair the important
signals of U501 as follows
The node
between R505 and C509
= "H" (RST)
R509 = "H" (BOOT)
R526 = "H" (MSIZE)
R528 = "L" (EXTPROC)
Replace PBA
No
Yes
No
Yes
No
Yes
No
Check U407
Resolder R509
Resolder R526
Resolder R528
5-3
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