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DUAL BAND Mobile
ELECTRONICS
Cellular Phone
SGH-N400
SERVICE Manual
DUAL BAND MOBILE CELLULAR PHONE CONTENTS
1. Exploded Views and Parts List
2. PCB Diagrams & Schematic Diagrams
3. Electrical Parts List
4. Block Diagrams
5. Flow Chart of Troubleshooting
1. Exploded Views and Parts List
1-1 Main
1-2 Main Parts List
1-3 Travel Adapter
1-4 Cigar Light Adapter
1-5 Simple Hands Free Kit
1-6 Test Jig
1-7 Earphone
1-8 Data Kit
1-9 Desk Top Charger
2. PCB Diagrams & Schematic Diagrams
2-1-1 Main Top
2-1-2 Main Bottom
2-2-1 Logic Schematic
2-2-2 Power Schematic
2-2-3 RF Schematic
3. Electrical Parts List
3-1 Main Parts
4. Block Diagrams
4-1 Main Base Band
4-2 Main RF
5. Flow Chart of Troubleshooting
5-1 Power ON
5-2 Initial
5-3 Charging Part
5-4 SIM Part
5-5 Microphone Part
5-6 Speaker Part
5-7 Key Data Input
5-8 Alert Tone
5-9 Ring Indicator
5-10 Back Light
5-11 Auto Antenna Troubleshooting
5-12 RF Troubleshooting
5-13 Tx Troubleshooting
5-14 Rx Troubleshooting
SAMSUNG Proprietary-Contents may change without notice
1. Exploded Views and Parts List
1-1 Main
1-2
14 1-3
1-5 1
1-1
1-4 1-6
13
1-7
8
6 7
5
4 10
12
2
11 9
15
16
17
3-4 22
3-1 3
3-3
3-2 21
20
21 19
18
23
SAMSUNG Proprietary-Contents may change without notice
1-1
1-2 Main Parts List
NO PART NAME SEC CODE Q'TY REMARK
1 FRONT ASS'Y GH75-00965A(EU) 1 SA
GH75-01257A(AMN)
GH75-01256A(ATL)
GH75-01213A(TIM)
GH75-01290A(WIN)
GH75-01255A(XEC)
1 FRONT COVER GH72-02155A 1 SNA
2 FLIP ASS'Y GH75-00967A(EU) 1 SA
GH75-01254A(AMN)
GH75-01253A(ATL)
GH75-01212A(TIM)
GH75-01289A(WIN)
GH75-01252A(XEC)
3 NAVI-DUMMY-FRONT GH72-02165A 1 SNA
4 HINGE ASS'Y GH75-00350A 1 SNA
5 LED LENS GH72-02161A 1 SNA
6 WINDOW-LCD GH72-02163A 1 SNA
7 SPONGE WINDOW GH74-01104A 1 SNA
2 MAIN-PBA GH92-00940A 1 SA
3 REAR ASS'Y GH75-00966A 1 SA
1 REAR COVER GH72-02421A 1 SNA
2 LOCKER MAIN GH72-02422A 1 SNA
3 SPRING LOCKER GH61-00009A 1 SNA
4 EARJACK RUBBER GH73-00608A 1 SNA
SAMSUNG Proprietary-Contents may change without notice
1-2
4 SHIELD COVER GH71-00466A 1 SA
5 KEY-PCB GH59-00172A 1 SA
6 MIC-RUBBER GH73-00609A 1 SA
7 NAVIGATION KEY GH72-02162A 1 SA
8 KEY-MAIN GH73-00603A 1 SA
9 INTENNA GUIDE GH75-01117A 1 SA
10 BUZZER RUBBER GH73-00602A 1 SA
11 COVER CONN. GH73-00758C 1 SA
12 LCD ASS