![background image](http://html.mh-extra.com/html/samsung/sgh-n300/sgh-n300_service-manual_1190924038.webp)
5-9
Flow Chart of Troubleshooting
5-5 Microphone Part
Microphone does not work
Resoler J101
J101 pin 4, 5 = short?
U110 pin 5 (AVCC) 3.0V?
Check the circuit
from U108 to MIC
Check the circuit related to U110
END
Resolder the
R177,R176,R174,R175
C188,C187,C189,U115,U113
ZD112,ZD109
Yes
No
Yes
Yes
Yes
No
No
Check CN103
Replace LCD_KEY_PAD
No
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 ...