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GSM TELEPHONE
GT-E2121B
GSM TELEPHONE
CONTENTS
1. Safety Precautions
2. Specification
3. Product Function
4. Array course control
5. Exploded View and Parts list
6. MAIN Electrical Parts List
7. Block Diagrams
8. PCB Diagrams
9. Chart of Troubleshooting
10. Reference data
11. Disassembly and Assembly
Instructions
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Table of Contents
Related Manuals for Samsung GT-E2121B
Summary of Contents for Samsung GT-E2121B
- Page 1 GSM TELEPHONE GT-E2121B GSM TELEPHONE CONTENTS 1. Safety Precautions 2. Specification 3. Product Function 4. Array course control 5. Exploded View and Parts list 6. MAIN Electrical Parts List 7. Block Diagrams 8. PCB Diagrams 9. Chart of Troubleshooting 10.
- Page 2 China china.samsungportal.com Asia asia.samsungportal.com Mideast & Africa mea.samsungportal.com This Service Manual is a property of Samsung Electronics Co.,Ltd. Samsung Electronics Co.,Ltd. ⓒ Any unauthorized use of Manual can be punished under applicable International and/or domestic law. 2010. 03. Rev.1.0...
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Page 3: Flow Chart Of Troubleshooting
OSC201 produces clock Solder OSC201 again signal Not OK Check the L118 concerning about Jig Solder L118 again Power on Is Power On working? Repeat sequence SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization... - Page 4 R138 UART0_TD R139 UART0_RD JIG_ON_IF USB_EN L118 JIG_ON R125 USB_DP R126 USB_DM R128 NC 22 C147 C149 C150 C148 NC 23 NC 25 ZD105 ZD104 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
- Page 5 Flow Chart of Troubleshooting SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
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Page 6: Sim Part
VSIM_3.0V at the pin#1 Check the SIM Power SIM200 = "H"? Is there any signal pin Check UCP201 #2,3,4 of SIM201? Check the SIM Card SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization... - Page 7 Flow Chart of Troubleshooting VSIM_3.0V R213 SIM_DATA SIM201 SIM_RST SIM_CLK 11 11 C232 C233 C234 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
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Page 8: Microphone Part - Phone Mic
C142 again MIC_BIAS Not OK Check the circuit Solder L108, R131, ZD100 and ZD103 of MIC PART again. Is Phone MIC working? Replace MIC SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization... - Page 9 Flow Chart of Troubleshooting MIC_BIAS R118 C140 L108 C141 MIC_P C142 R130 R131 MIC100 0ohm C145 MIC_N C146 R132 MAIN_MIC SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
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Page 10: Microphone Part - Earphone Mic
) Not OK Check the circuit Solder L111, L113 and R120 again of EAR MIC Repeat the sequence Is Earphone MIC working? SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization... - Page 11 C150 C148 NC 23 R129 NC 25 ZD105 ZD104 MIC_BIAS R118 C140 L108 C141 MIC_P C142 R130 R131 MIC100 0ohm C145 MIC_N C146 R132 MAIN_MIC SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
- Page 12 Flow Chart of Troubleshooting 9-10 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
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Page 13: Earphone Part
Check the circuit of IFC100 , L115, L116 and L117 again Not OK Check the UCP201 Solder UCP201 or replace UCP201 Pin R19, T19, P19 9-11 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization... - Page 14 R125 USB_DP R126 USB_DM R128 TA_DETECT 1005 NC 22 C147 C149 C150 C148 NC 23 R129 NC 25 ZD105 ZD104 Digital External Interface- UART 9-12 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
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Page 15: Charging Part
Check the U200 Replace U200 Pin #1 = 5V? Not OK Check the C225 and Solder C225 and R214. R214 Check the TA connection. 9-13 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization... - Page 16 Flow Chart of Troubleshooting 9-14 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
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Page 17: Speaker Part
ZD101 and ZD102 ZD102 again Not OK Check Pin W18, W19 of Solder UCP201 again or replace UCP201 UCP201 Not OK Replace the speaker 9-15 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization... - Page 18 Flow Chart of Troubleshooting SPK_N HSET_OUT_N R210 SPK_P HSET_OUT_P EAR_SW HKSW_DET1 EAR_SW_REF HKSW_DET2 SPEAKER_PAD L109 33nH SPK_N C143 L110 SPK_P SPEAKER 9-16 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
- Page 19 Flow Chart of Troubleshooting ZD101 L110 L109 ZD102 L302 9-17 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
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Page 20: Key Data Input
Check the Dome sheet & Key FPCB pushed, is it displayed on LCD? When one of the keys is Replace the PBA pushed, KEY_IO signal is OK? 9-18 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization... -
Page 21: Back Light (For Color Main Lcd)
Set BACKLIGHT on Always ON in the Menu? Not OK Check the outflow voltage of Replace U303 U303(PIN 3) is equal to 3.7V Replace the LCD Module 9-19 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization... - Page 22 Flow Chart of Troubleshooting VBAT U303 LCD_BL_EN -LED1 R325 RSET 1005 -LED2 C310 9-20 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
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Page 23: Key Back Light
Is BACKLIGHT set Always Set BACKLIGHT on Always ON ON in the Menu? Not OK Resolder C309 and replace U302. Check KEY_EN and C309 Replace LED 9-21 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization... - Page 24 Flow Chart of Troubleshooting VBAT U302 MIC5365-3.3YMT VOUT KEY_EN R314 R315 R316 R317 R318 R319 C308 C309 LED300 LED301 LED302 LED303 LED304 LED305 KEY LED 9-22 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
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Page 25: Gsm Receiver
Check C125, C127, and L106 pin G1, F1 (EGSMRX) ≥ -65dBm Not ok Resolder or Change F100 Check UCP201 Resolder or Change MOD_STANDBY=HIGH UCP201 PON_PA=LOW BAND=LOW 9-23 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization... -
Page 26: Gsm Transmitter
Flow Chart of Troubleshooting 9-12. GSM Transmitter TX ON (5Level) Resolder PAM100 PAM100 Pin16 (TX MODULE) ≥ 30dBm PAM100 pin4 0dBm ≥ Check UCP201 Resolder UCP201 9-24 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization... -
Page 27: Dcs Receiver
E1, D1 (DCSRX) ≥ -65dBm > Not ok Resolder or Change F100 Check UCP201 Resolder or Change MOD_STANDBY= "HIGH" PON_PA= "LOW" UCP201 BAND= "HIGH" 9-25 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization... -
Page 28: Dcs Transmitter
Flow Chart of Troubleshooting 9-14. DCS Transmitter TX ON (0Level) PAM100 Pin16 Resolder PAM100 ≥ 30dBm PAM100 pin2 0dBm ≥ Check UCP201 Resolder UCP201 9-26 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization... - Page 29 Flow Chart of Troubleshooting 9-27 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
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Page 30: Fm Radio Part
Is there any signals at the Not OK Pin# P 18 and #R18 of Solder UCP201 again UCP201? Not OK Replace the UCP201 Resolder of change U311 9-28 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization... - Page 31 Flow Chart of Troubleshooting 9-29 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
- Page 32 Not OK Check the path form UCP201 Check Testpoint 100=32khz to U103 Not OK Check the Status of Enable BT Function ANT102 Replace U103 9-30 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
- Page 33 Flow Chart of Troubleshooting 9-31 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
- Page 34 Up to 42 GPIOs(1.8V/2,8V) BATTERY 78MHz burst memory access MEMORY EAR MIC Audio Subsystem IF CONNECTOR BACK-END IC SPEAKER AIT708U EAR SPEAKER Camera SD CARD CSTN SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
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Page 35: Pcb Diagrams
8. PCB Diagrams 8-1. Top SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization... - Page 36 PCB Diagrams 8-2. Bottom SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...