Samsung SGH-E420 User manual

GSM TELEPHONE
SGH-E420
GSM TELEPHONE CONTENTS
1. Safety Precautions
2. Specification
3. Product Function
4. Array course control
5. Exploded View/Disassembly
and Assembly Instructions
6. MAIN Electrical Parts List
7. Block Diagrams
8. PCB Diagrams
9. Flow Chart of Troubleshooting
10. Reference data

CONTENTS
1. Safety Precautions
1-1. Repair Precaution......................................................................................................1-1
1-2. ESD(Electrostatically Sensitive Devices) Precaution...............................................1-2
2. Specification
2-1. GSM General Specification.......................................................................................2-1
2-2. GSM Tx Power Class...............................................................................................2-2
3. Product Function
4. Array course control
4-1. Software Adjustments................................................................................................4-1
4-2. Software Downloading...............................................................................................4-2
5. Exploded View/Disassembly & Assembly Instructions
5-1. Cellular phone Exploded View..................................................................................5-1
5-2. Cellular phone Parts list............................................................................................5-2
5-3. Disassembly & Assembly Instructions......................................................................5-4
6. MAIN Electrical Parts List
7. Block Diagrams
8. PCB Diagrams

CONTENTS
9. Flow Chart of Troubleshooting
9-1. Pown on.....................................................................................................................9-1
9-2. Initial...........................................................................................................................9-3
9-3. Charging Part.............................................................................................................9-6
9-4. SIM Part.....................................................................................................................9-8
9-5. Microphone Part.......................................................................................................9-10
9-6. Speaker Part............................................................................................................9-12
9-7. Key Data Input........................................................................................................9-14
9-8. Receiver Part...........................................................................................................9-15
9-9. LCD Part..................................................................................................................9-16
9-10. Key Back Light......................................................................................................9-18
9-11. Camera Part...........................................................................................................9-19
9-12. GSM Receiver........................................................................................................9-21
9-13. GSM Transmitter....................................................................................................9-22
9-14. DCS Receiver........................................................................................................9-23
9-15. DCS Transmitter....................................................................................................9-24
9-16. PCS Receiver.........................................................................................................9-25
9-17. PCS Transmitter.....................................................................................................9-23
10. Reference data

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1. Safety Precautions
1-1
This Document can not be used without Samsung's authorization
1-1. Repair Precaution
● Repair in Shield Box, during detailed tuning.
Take specially care of tuning or test,
because specipicty of cellular phone is sensitive for surrounding interference(RF noise).
● Be careful to use a kind of magnetic object or tool,
because performance of parts is damaged by the influence of magnetic force.
● Surely use a standard screwdriver when you disassemble this product,
otherwise screw will be worn away.
● Use a thicken twisted wire when you measure level.
A thicken twisted wire has low resistance, therefore error of measurement is few.
● Repair after separate Test Pack and Set because for short danger (for example an
overcurrent and furious flames of parts etc) when you repair board in condition of
connecting Test Pack and tuning on.
● Take specially care of soldering, because Land of PCB is small and weak in heat.
● Surely tune on/off while using AC power plug, because a repair of battery charger is
dangerous when tuning ON/OFF PBA and Connector after disassembling charger.
● Don't use as you pleases after change other material than replacement registered on
SEC System.
Otherwise engineer in charge isn't charged with problem that you don't keep this rules.

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Safety Precautions
1-2
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1-2. ESD(Electrostatically Sensitive Devices) Precaution
Several semiconductor may be damaged easily by static electricity. Such parts are called by ESD
(Electrostatically Sensitive Devices), for example IC,BGA chip etc. Read Precaution below.
You can prevent from ESD damage by static electricity.
● Remove static electricity remained your body before you touch semiconductor or parts with
semiconductor. There are ways that you touch an earthed place or wear static electricity
prevention string on wrist.
● Use earthed soldering steel when you connect or disconnect ESD.
● Use soldering removing tool to break static electricity. , otherwise ESD will be damaged by
static electricity.
● Don't unpack until you set up ESD on product. Because most of ESD are packed by box and
aluminum
plate to have conductive power,they are prevented from static electricity.
● You must maintain electric contact between ESD and place due to be set up until ESD is
connected
completely to the proper place or a circuit board.

2. Specification
2-1
2-1. GSM General Specification
GSM900
Phase 1
EGSM 900
Phase 2
DCS1800
Phase 1 PCS1900
Freq.
Band[MHz]
Uplink/Downlink
890~915
935~960
880~915
925~960
1710~1785
1805~1880
1850~1910
1930~1990
ARFCN range 1~124 0~124 &
975~1023 512~885 512~810
Tx/Rx spacing 45MHz 45MHz 95MHz 80MHz
Mod. Bit rate/
Bit Period
270.833kbps
3.692us
270.833kbps
3.692us
270.833kbps
3.692us
270.833kbps
3.692us
Time Slot
Period/Frame
Period
576.9us
4.615ms
576.9us
4.615ms
576.9us
4.615ms
576.9us
4.615ms
Modulation 0.3GMSK 0.3GMSK 0.3GMSK 0.3GMSK
MS Power 33dBm~5dBm 33dBm~5dBm 30dBm~0dBm 30dBm~0dBm
Power Class 5pcl ~ 19pcl 5pcl ~ 19pcl 0pcl ~ 15pcl 0pcl ~ 15pcl
Sensitivity -102dBm -102dBm -100dBm -100dBm
TDMA Mux 888 8
Cell Radius 35Km 35Km 2Km -

Speclflcation
2-2
TX Power
control level
GSM900
533±2dBm
631±2dBm
729±2dBm
827±2dBm
925±2dBm
10 23±2 dBm
11 21±2 dBm
12 19±2 dBm
13 17±2 dBm
14 15±2 dBm
15 13±2 dBm
16 11±3 dBm
17 9±3dBm
18 7±3 dBm
19 5±3 dBm
TX Power
control level
DCS1800
030±3dBm
128±3dBm
226±3dBm
324±3dBm
422±3dBm
520±3dBm
618±3dBm
716±3dBm
814±3dBm
912±4dBm
10 10±4 dBm
11 8±4dBm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
15 0±5 dBm
TX Power
control level
PCS1800
030±3dBm
128±3dBm
226±3dBm
324±3dBm
422±3dBm
520±3dBm
618±3dBm
716±3dBm
814±3dBm
912±4dBm
10 10±4 dBm
11 8±4dBm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
15 0±5 dBm
2-2. GSM Tx Power Class

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3. Product Function
3-1
This Document can not be used without Samsung's authorization
Main Function
-VGA Camera
-65536 Color OLED Main Screen (128×160)
65536 Color OLED Sub Screen (96×96)
-SMS/EMS/MMS Message Service
-WAP Http support
-J2ME JAVA (MIDP 2.0/CLDC 1.1)
-Speaker phone
-40 Poly Melody
-vCard, vCalendar
-E-mail Client
-Tri-band(900/1800/1900MHz)

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Product Function
3-2
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4. Array course control
4-1
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4-1. Software Adjustments
Test Jig (GH80-01909A)Test Jig (GH80-01909A) Test Cable (SGH-E420 VER2)Test Cable (SGH-E420 VER2)
Power Supply CableSerial Cable(CSA LL64151-A)

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Array course control
4-2
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4-2. Software Downloading
4-2-1. Pre-requsite for Downloading
• Downloader Program(Lily Downloader 2.0.exe)
• E420 Mobile Phone
• Data Cable
• Binary file, TFS file
4-2-2. S/W Downloader Program
■Load the binary download program by executing the
“Lily Downloader 2.0.exe”
1. Select the connected serial port and therateofspeed
2. Select the check box, the mode you want to download.
- if the binary file wanted, check only 'BIN'
- if the tfs file wanted, check only 'TFS'
- if all the files wanted, check 'BIN+TFS'
12

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Array course control
4-3
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3. Select the file(s) what you want to download

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Array course control
4-4
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5-1
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5. Exploded View/Disassembly&Assembly Instructions
5-1. Cellular phone Exploded View
QFU01
QME15
QLB01
QFR01
QRF03
QCA01
QLC01 QMO01
QVK01
QFL01
QCR26
QSC01
QSP01
QHI01
QKP01
QME01
QCA02
QMI01
QCR12
QAN02
QCK01
QRE01
QMI03
QCR05
QBA01
QBA00
QAN05
QVO01
QRF01
QMP01

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Exploded View/Disassembly&Assembly Instructions
5-2
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5-2. Cellular phone Parts list
Design LOC Description Sec Code
QAN02 INTENNA-SGHE420 GH42-01018A
QAN05 ASSY MEC-INTENNA CONTACT GH75-08168A
QBA00 PMO-COVER BATTERY GH72-33285A
QBA01 INNER BATTERY PACK-750MAH,BLK, GH43-02483A
QCA01 UNIT-CAMERA MODULE GH59-03566A
QCA02 UNIT-CAMERA KEY GH59-03606A
QCK01 PMO-CAMERA KEY GH72-33287A
QCR05 SCREW-MACHINE 6001-001478
QCR12 SCREW-MACHINE 6001-001530
QCR26 SCREW-MACHINE 6001-001850
QFU01 ASSY CASE-FOLDER UPPER GH98-01842A
QKP01 ASSY KEYPAD-(SER/UWA) GH98-02645A
QLB01 ASSY BRACKET-LCD GH98-01846A
QME01 UNIT-METAL DOME GH59-03605A
QME15 ELA ETC-EL SHEET(PNK) GH96-02356A
QMI01 MICROPHONE-ASSY-SGHE420 GH30-00311A
QMO01 MOTOR DC-SGHE420 GH31-00198C
QMP01 PBA MAIN-SGHE420 GH92-03133A
QRF01 RMO-COVER RF GH73-08169A
QSC01 RMO-COVER SCREW GH73-08170A
QSP01 SPEAKER 3001-002064
QVK01 UNIT-VOLUME KEY GH59-03595A
QVO01 PMO-VOLUME KEY GH72-33286A
QFR01 ASSY CASE-FRONT GH98-01844A
QRF03 PMO-COVER EAR GH72-33281A
QFL01 ASSY CASE-FOLDER LOWER GH98-01843A
QHI01 ASSY MEC-HINGE(CAN TYPE) GH75-04662A
QLC01 LCD-M/S SGH-E420 GH07-01014A
QMW01 AS-LCD WINDOW SVC GH81-06126A
QRE01 ASSY CASE-REAR GH98-01845A
QMI03 RMO-RUBBER MIC GH73-08187A

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Exploded View/Disassembly&Assembly Instructions
5-3
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Description Sec Code
BAG PE 6902-000634
ADAPTOR-SGHE690,SIL,EU,A_TYPE GH44-01361B
LABEL(P)-WATER SOAK GH68-02026A
LABEL(P)-WATER SOAK GH68-02026A
MANUAL-SFC GH68-04336A
LABEL(P)-BARCODE RUSSIA GH68-08494A
MANUAL USERS-EU RUSSIAN GH68-12319A
LABEL(R)-MAIN(SER) GH68-12806A
BOX-UNIT(SER) GH69-04579A
CUSHION-CASE(EU) GH69-04581A
MPR-INSU TAPE GH74-18047A
MPR-TAPE MIC GH74-25834A
MPR-GASKET LCD CONN GH74-25836A
MPR-VINYL BOHO F/LOWER GH74-26366A
MPR-VINYL BOHO F/UPPER 2DN GH74-26368A
MPR-TAPE,9.1X3.1XT0.06,3M1361 GH74-26419A
MPR-INSULATION TAPE,11.2X7.5XT GH74-26425A
MPR-INSU TAPE EL CONN GH74-27032A
MPR-TAPE MAIN LCD GH74-27500A
MPR-SPONGE LCD GH74-27688A
MPR-INSU TAPE GH74-28027A
MPR-VINYL BOHO MAIN GH74-29305A
MPR-VINYL BOHO REAR BATT GH74-29981A
AS-MAIN LCD SVC GH81-05969A
AS-SUB LCD SVC GH81-05970A
AS-LCD PCB SVC GH81-05971A
AS-WINDOW TAPE SVC GH81-06097A

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Exploded View/Disassembly&Assembly Instructions
5-4
This Document can not be used without Samsung's authorization
                   
         
         
         
          
       
       
       
      


    
      
      

       
   

     
       
   
5-3. Disassembly and Assembly Instructions
―Disassembly

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Exploded View/Disassembly&Assembly Instructions
5-5
This Document can not be used without Samsung's authorization
         
                 
          

          

 
 
   
    
  
      
   
       
     

       
    
       
      

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Exploded View/Disassembly&Assembly Instructions
5-6
This Document can not be used without Samsung's authorization
  󰳕 󲉥󲆖󰳕󲪕 󲘟󱒙󱤲 󲧑󲠭󳘱󱎹  󲙦󱭉󳈡󲡣󲠑󱤱  󱭽󱖝󲡉 󰶵󲣪󱓭󲚉 󲡝󲠑󱲕󱤱 󱹙󱪁 󲎱
󲧑󲠭󳘱󱎹
          

        
     
         

1)         
     
   
       
      

       

SAMSUNG Proprietary-Contents may change without notice
Exploded View/Disassembly&Assembly Instructions
5-7
This Document can not be used without Samsung's authorization
         
      
 When inserting the camera module,   
    
When inserting the motor and the speaker, it pays
attention in WIRE control.
1) When attaching the TAPE, be careful not to
damage camera FPCB at pincette.
         
 
 When attaching an insulation TAPE, be careful
not to cover the LCD.
 


      
      
   
    
  
     
       
     
       
     
 
      
    
        
  
       

―Assembly