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5-2 Initial
Initial Failure
Downloading SW is OK ?
(Is CSROM signal OK ?)
Yes
Check all the other connection
by Test S/W
Check the circuit around LCD
Check the circuit
around U402(EEPROM)
and data stored in it
END
5-3
No
After power on,
check and repair the important
signals of U400 as follows
The node
between R408 and C408
= "H" (RST)
Yes
R412 = "H" (BOOT)
Yes
R425 = "H" (MSIZE)
Yes
R426 = "L" (EXTPROC)
Replace PBA
Flow Chart of Troubleshooting and Circuit Diagrams
No
Check the circuit
related to reset
No
Resolder R412
No
Resolder R425
No
Resolder R426
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