![background image](http://html.mh-extra.com/html/samsung/sgh-t400/sgh-t400_service-manual_1191122029.webp)
Flow Chart of Troubleshooting and Circuit Diagrams
5-5
5-3 Charging Part
Abnormal charging part
Replace TA
Check the CN4-1 pin 17,18 > 4.9 V ?
No
Yes
Yes
Check the U305 pin 3 > 4.9 V ?
Resolder C339
Yes
No
R342(CHG_ON side) = "L" ?
Resolder R342
Yes
No
Resolder components around
U305
Check the U305 pin 5 4.2V ?
END
Yes
No
Summary of Contents for SGH-T400
Page 2: ...Samsung Electronics Co Ltd Printed in Korea 12 2002 Rev 1 0 GH68 03158A ELECTRONICS ...
Page 11: ...2 1 PCB Diagrams 2 PCB Diagrams 2 1 Main Top ...
Page 12: ...2 2 PCB Diagrams 2 2 Main Bottom ...
Page 26: ...Flow Chart of Troubleshooting and Circuit Diagrams 5 2 ...
Page 30: ...5 6 Flow Chart of Troubleshooting and Circuit Diagrams ...
Page 38: ...5 14 5 8 Receiver Part Flow Chart of Troubleshooting and Circuit Diagrams ...
Page 39: ...5 15 Flow Chart of Troubleshooting and Circuit Diagrams ...
Page 40: ...5 16 Flow Chart of Troubleshooting and Circuit Diagrams 5 9 Ring Indicator ...
Page 43: ...5 19 Flow Chart of Troubleshooting and Circuit Diagrams 5 12 GSM Receiver ...
Page 44: ...Flow Chart of Troubleshooting and Circuit Diagrams 5 20 5 13 GSM Transmitter ...
Page 45: ...5 21 Flow Chart of Troubleshooting and Circuit Diagrams 5 14 DCS Receiver ...
Page 46: ...Flow Chart of Troubleshooting and Circuit Diagrams 5 22 5 15 DCS Transmitter ...