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Flow Chart of Troubleshooting
5-22
5-13 DCS Receiver
Rx On
RF input : CH center freq. + 67.7 kHz
Amp. : -50 dBm
U304
Pin 2
≥
-65 dBm
U304
Pin 16
≥
-65 dBm
F305
Pin 5
≥
-70 dBm
F302
Pin 2
≥
-60 dBm
U305
Pin 2, 3
≥
-60 dBm
U305
Pin 49, 50
(225 MHz)
≥
-50 dBm
U305
Pin 43, 44
(45 MHz)
≥
-55 dBm
Resolder
J301
Resolder &
U304 Pin 16
≥
-65 dBm
Check
VC1 : L
VC2 : L
VC3 : H
Resolder
F305
Resolder
F302, C331, C332
Check
C301(CH-225MHz)
≥
-20 dBm
C315(1080MHz)
≥
-20 dBm
Resolder
U302
U305
Pin 24, 25, 26, 27
≥
40 mV
Resolder
OneC(U108), U305
Check U305
Pin 32,33
≥
2.5 V
Pin 35
≥
2.5 V
Resolder
U305 (Pin 35, Pin 32, 33)
Resolder
U108
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Resolder
C350, L319, C354,
L318, L321, C355
Resolder
F301,C309,C310,C313
C314,C318,C312,L308, R309
No
Содержание SGH-N300
Страница 2: ...Samsung Electronics Co Ltd Printed in Korea 06 2001 Rev 1 0 GH68 02097A ELECTRONICS ...
Страница 10: ...1 7 Exploded Views and Parts List 1 8 Earphone EARPHONE GH59 00225A 1 9 Data Kit DATA KIT GH39 30533A ...
Страница 11: ...Exploded Views and Parts List 1 8 1 10 Desk Top Charger DESK TOP CHARGER GH44 00206A ...
Страница 12: ...2 1 PCB Diagrams Schematic Diagrams 2 PCB Diagrams 2 1 Main Top ...
Страница 13: ...2 2 PCB Diagrams Schematic Diagrams 2 2 Main Bottom ...
Страница 39: ...Flow Chart of Troubleshooting 5 10 J101 MIC ON KEY_PAD U108 VX1P VX1N MIC MIC 1 5 4 MIC MIC RC FILTER ...
Страница 41: ...Flow Chart of Troubleshooting 5 12 J101 SPK101 U110 PWO1P PWO1N SPK SPK 6 2 3 SPK SPK ...