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DUAL BAND Mobile Cellular Phone ELECTRONICS SGH-T400 SERVICE Manual DUAL BAND MOBILE CELLULAR PHONE CONTENTS 1. Exploded Views and Parts List 2. PCB Diagrams 3. Electrical Parts List 4. Block Diagrams 5. Flow Chart of Troubleshooting and Circuit Diagrams...
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ELECTRONICS Samsung Electronics Co.,Ltd. Printed in Korea 12/2002 Rev 1.0 GH68-03158A...
1. Exploded Views and Parts List Main Main Parts List Travel Adapter Travel Adapter Parts List Ciger Light Adapter Ciger Light Adapter Parts List Test Jig EAR Microphone Data Kit 1-10 Battery Charger 2. PCB Diagrams Main Top Main Bottom 3.
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1. SGH-T400 Exploded Views and Parts List 1-1 Main Exploded Views and Parts List...
1-3 Travel Adapter 1-4 Travel Adapter Parts List TYPE SEC CODE REMARK GH44-00171A CHINA GH44-00184A EUROPE GH44-00171C UNITED KINGDOM Gh44-00171E TAIWAN Exploded Views and Parts List...
1-5 Ciger Light Adapter 1-6 Ciger Light Adapter Parts List DESCRIPTION SEC CODE REMARK Ciger Light Adapter Code GH44-00170A BLACK Exploded Views and Parts List...
1-7 Test Jig TEST JIG GH80-10508A TEST JIG CABLE GH39-00079A RF CABLE GH39-00182A Exploded Views and Parts List...
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1-7-1 Test Jig POWER SUPPLY 8922 or 8960 WIRELESS COMMUNICATIONS TEST SET RF CABLE TEST JIG CABLE 232 CABLE Note PC Exploded Views and Parts List...
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1-8 Wearable EAR Microphone Wearable EAR Microphone GH59-00394B 1-9 Data Kit DATA KIT GH39-00143B 1-10 Battery Charger BATTERY CHARGER GH44-00279A Exploded Views and Parts List...
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2. PCB Diagrams 2-1 Main Top PCB Diagrams...
3. Electrical Parts List 3-1 Main Parts List Top NO Refer Part Description Vendor Part No. ence CODE D300 0401-001033 DIODE-SWITCHING;MCL4154 MCL4154 D400 0406-001083 DIODE-TVS;ESDA6V1W5 ESDA6V1W5 D314 0407-001007 DIODE-ARRAY;UMN1 UMN1 Q100 0501-000225 TR-SMALL SIGNAL;2SC4617 2SC4617 Q302 0501-002011 TR-SMALL SIGNAL;2SD2114KT146V 2SD2114KT146V Q305 0502-001201 TR-POWER;ZXT13P20DE6...
5. Flow Chart of Troubleshooting and Circuit Diagrams 5-1 Power ON 'POWER ON'does not work Check the Battery Voltage Charge the Battery is more than 3.4V? The node Check U300 and the path from +VBATT between D300 and C305 > 2.8 V ? to C305 When the "END"...
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Flow Chart of Troubleshooting and Circuit Diagrams...
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5-2 Initial Initial Failure After power on, Downloading SW is OK ? check and repair the important (Is CSROM signal OK ?) signals of U406 as follows The node Check the circuit between R456 and C462 related to reset = "H" (RST) R461 = "H"...
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Flow Chart of Troubleshooting and Circuit Diagrams...
5-3 Charging Part Abnormal charging part Check the CN4-1 pin 17,18 > 4.9 V ? Replace TA Check the U305 pin 3 > 4.9 V ? Resolder C339 R342(CHG_ON side) = "L" ? Resolder R342 Resolder components around Check the U305 pin 5 4.2V ? U305 Flow Chart of Troubleshooting and Circuit Diagrams...
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Flow Chart of Troubleshooting and Circuit Diagrams...
5-4 Sim Part Phone can't access SIM card Q304 pin 4 = 3.0 V ? Resolder R338 Replace Q304 or Q304 pin 5 = "H" ? Replace PBA Q304 pin 2, 3 = 3.0 V ? Replace Q304 After Power ON, Check SIMCLK Signal on CN302 pin 3 Replace PBA in a few second...
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Flow Chart of Troubleshooting and Circuit Diagrams...
5-5 Microphone Part Microphone does not work Check the connection Resolder MIC FPCB from MIC Check the circuit Resolder the R468, R469, R472, related to U406 R474, C482, C485 and C488 Check the MIC Replace the MIC Flow Chart of Troubleshooting and Circuit Diagrams...
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5-10 Flow Chart of Troubleshooting and Circuit Diagrams...
5-6 Speaker Part Speaker does not work R471 = "H"? Replace the PBA (MC_PDN) U105 pin 13 = "H" ? Resolder R118 Check the clock generation circuit Check the clock signal at Pin1 of U302 (related to U102 and Q100) U304 pin 3, 9 = 1.8 V ? Resolder U304 CN100 pin 5, 6 = 1.8 V ?
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SPVSS SPVD HPOUT-R IOVD HPOUT-L/MONO Flow Chart of Troubleshooting and Circuit Diagrams 5-12...
5-7 Key Data Input Check Initial operation When one of the keys is pushed, Check the Dome sheet is it displayed on LCD Keypad is OK ? Replace the PBA 5-13 Flow Chart of Troubleshooting and Circuit Diagrams...
5-9 Ring Indicator 5-16 Flow Chart of Troubleshooting and Circuit Diagrams...
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5-10 Back Light (for Color Main LCD) Backlight does not work LCD Contrast high level Select LCD Contrast high level in the menu ? U401 pin 2 = "H" ? CN100 pin 11 = "H" ? Check for the pulse signal Check the circuit Replace the PBA Resolder U401...
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5-11 Back Light (for Sub LCD & Key) Backlight does not work Backlight "ON" mode Select backlight "ON" mode in the menu? GPIO7 by test S/W Q302 pin 1 = "H" ? KEY PCB LED LCD BACKLIGHT R484 = "H" ? GPIO2 by test S/W Check the Check the CN100 pin 2 = "H"...
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