Samsung SGH-A200 Service Manual page 33

5-2 Initial
Initial Failure
U103 pin 4 = "H" ?
Check all the other connection
by Test S/W
Check the circuit around LCD
Check the circuit
around U107(EEPROM)
and data stored in it
END
Flow chart of Troubleshooting and Circuit Diagram
No
Yes
Check and repair the important
signals of U108 as follows
The node
between R162 and C183
= "H" (RST)
Yes
R114 = "H" (BOOT)
Yes
R673 = "H" (MSIZE)
Yes
R165 = "L" (EXTPROC)
Replace PBA
No
Check U112
No
Resolder R114
No
Resolder R673
No
Resolder R165
5-3