Flow Chart of Troubleshooting
5-3
5-2 Initial
Initial Failure
After power on,
check and repair the important
signals of U108 as follows
END
No
Downloading SW is OK ?
(Is CSROM signal OK ?)
The node
between R162 and C183
= "H" (RST)
No
Check the circuit
related to reset
R114 = "H" (BOOT)
No
Resolder R114
Yes
R150 = "H" (GPIO4)
No
Resolder R150
Yes
R165 = "L" (GPIO2)
No
Resolder R165
Yes
Replace PBA
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
Yes
Summary of Contents for SGH-N300
Page 2: ...Samsung Electronics Co Ltd Printed in Korea 06 2001 Rev 1 0 GH68 02097A ELECTRONICS ...
Page 11: ...Exploded Views and Parts List 1 8 1 10 Desk Top Charger DESK TOP CHARGER GH44 00206A ...
Page 12: ...2 1 PCB Diagrams Schematic Diagrams 2 PCB Diagrams 2 1 Main Top ...
Page 13: ...2 2 PCB Diagrams Schematic Diagrams 2 2 Main Bottom ...
Page 41: ...Flow Chart of Troubleshooting 5 12 J101 SPK101 U110 PWO1P PWO1N SPK SPK 6 2 3 SPK SPK ...