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DUAL BAND Mobile Cellular Phone ELECTRONICS SGH-N288 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 trouble shooting...
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ELECTRONICS Samsung Electronics Co.,Ltd. Printed in Korea 05/2001 Rev 5.1 GH68-02032A...
1. Exploded Views and Parts List Main Main Parts List Travel Adapter Travel Adapter Parts List Cigar Light Adapter Cigar Light Adapter Parts List Test Jig 1-7-1 Test Jig Wearable EAR Microphone Data Kit 1-10 Battery Charger 2. PCB Diagrams Main Top Main Bottom 3.
1-5 Cigar Light Adapter 1-6 Cigar 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 JIG CABLE GH39-00089A Exploded Views and Parts List...
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DM CABLE GH39-00080A 1-7-1 Test Jig POWER SUPPLY 8922 or 8960 WIRELESS COMMVNCATIONS TEST SET RF JIG CABLE 232 CABLE TEST JIG CABLE Exploded Views and Parts List...
3. Electrical Parts List 3-1 Main Parts List Top Reference SEC Code Part Description Vendor Part No C102 2203-000233 C-CERAMIC,CHIP;0.1nF,5%,5 CM05CG101J50AT C128 2203-005509 C-CERAMIC,CHIP;330nF,+80- GRM36Y5V334Z10PT C130 2203-005061 C-CERAMIC,CHIP;100nF,+80- MCH153F104ZK C201 2203-000679 C-CERAMIC,CHIP;0.027nF,5% CM05CG270J50AT C202 2203-000679 C-CERAMIC,CHIP;0.027nF,5% CM05CG270J50AT C203 2203-005065 C-CERAMIC,CHIP;1000nF,+80 CL10F105ZONC C204 2203-001101...
5. Flow chart of trouble shooting 5-1 Power ON ’POWER ON’ does not work Check the Battery Voltage Charge the Battery is more than 3.2V The node Check U100 and the path from +VBATT between D100 and M100 = 3V to M100 U106 pin 1,4,10 >...
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5-2 Initial Initial Failure Check and repair the important U401 pin 4 = "H" ? signals of U501 as follows The node between R505 and C509 Check U407 = "H" (RST) R509 = "H" (BOOT) Resolder R509 Check all the other connection by Test S/W R526 = "H"...
5-4 Sim Part Phone can't access SIM card Check the circuit related to U102 U300 pin4,6 = 3V ? Replace the PBA U300 pin5 = "H" ? Replace U300 U300 pin2,3 = 3V ? Resoldering CN301 and check open CN301 pin3,7 = 3V ? connection from U300 to CN301 After Power ON, Check SIMCLK Signal on CN301 pin 1...
5-5 Microphone Part Microphone does not work Check the connection Resolder CN211 pin 16, 17 from CN211 pin 16, 17 Check the circuit related to U105 U502, U503 pin 2 (AVCC) 3.0V? Check the circuit Resolder the R525, R527, R530, R531 from U501 to U502, U503 C553, C532 and C538 Replace the Key PCB...
5-6 Speaker Part Speaker does not work Check the depression of Modify the SPK pins the SPK pins Replace the Speaker Is Speaker working? Flow chart of trouble shooting 5-11...
5-7 Key Data Input Check Initial operation the pin 7, 8, 9 and 10 Replace the PBA of CN211 low? When one of the keys is pushed, Resolder pin 7, 8, 9 and 10 one of pin 7, 8, 9 and 10 of CN211 of CN211 is high ? Key PCB is OK ?
5-8 Alert tone Abnormal Alert tone Is there alert wave form on the ALERT by Test S/W R539 during alert tone test? Is there alert wave form on the Check the circuit related to Q500 Q500 pin 3 during alert tone test? U100 pin 3 3.3V? Check the circuit related to U100...
5-9 Ring Indicator Ring Indicator LED does not work GPO2 by Test S/W Q204 pin 2 = "H" ? Replace LED208 Between LED208 and R215 = "L" ? Check the LED Resolder R215, Q204 Flow chart of trouble shooting 5-15...
5-10 Back Light Backlight does not work Backlight "ON" mode Select backlight "ON" mode in the menu? Between R211 and R212 = "H"? GPO1 by test S/W LCD BACKLIGHT KEY PCB LED LED209 Pin 1 3.3V? Check the circuit related U112 LCD backlight on ? Resolder LED209 or Check Q200 Resolder R211, R212...