5-3
Flow chart of trouble shooting
5-2 Initial
Initial Failure
Check and repair the important
signals of U501 as follows
END
No
U401 pin 4 = "H" ?
The node
between R505 and C509
= "H" (RST)
No
Check U407
R509 = "H" (BOOT)
No
Resolder R509
Yes
Yes
R526 = "H" (MSIZE)
No
Resolder R526
Yes
R528 = "L" (EXTPROC)
No
Resolder R528
Yes
Replace PBA
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
