SAMSUNG SGH-N100
Instrukcja Serwisowa

5-2 Initial

Initial Failure

No
U452 pin 4 = "H" ?

Check and repair the important signals of U414 as follows

The node between R312 and C325 = "H" (RST)

No
Check U307

Yes

No
R348 = "H" (BOOT) Resolder R348

Yes
Check all the other connection by Test S/W R440 = "H" (MSIZE)

No
Resolder R440

Yes
Check the circuit around LCD

No
R438 = "L" (EXTPROC) Resolder R438

Check the circuit around U304(EEPROM) and data stored in it Replace PBA

END

Flow chart of trouble shooting

5-2