Instruction/ maintenance manual of the product SGH-I750 Samsung
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GSM TELEPHONE SGH-i750 GSM TELEPHONE CONTENTS 1. Specification 2. Circuit Description 3. Exploded Views and Parts List 4. Electrical Parts List 5. Block Diagrams 6.
SAMSUNG Proprietary-Contents may change without notice 1. Specification This Document can not be used with out Samsung's authorizat ion 1-1 PCS1900 1850~1910 1930~1990 512~810 80MHz 270.833kbps 3.692us 576.9us 4.615ms 0.3GMSK 30dBm~0dBm 0pcl ~ 15pcl -100dBm 8 - GSM900 Phase 1 EGSM 900 Phase 2 DCS1800 Phase 1 Freq.
SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung's authorizat ion Specificat ion 1-2 TX Power control level PCS1900 0 30±3 dBm 1 28±3 dBm 2 .
SAMSUNG Proprietary-Contents may change without notice 2. Circuit Description This Document can not be used with out Samsung's authorizat ion 2-1 2-1. SGH-i750 RF Circuit Description 2-1-1. ANTENNA SWITCH (U 101:LMG003S-5091A) → Switching Tx, Rx path f or EGSM900, DCS18 00 and PCS1900 by logic cont rolling.
SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung's authorizat ion Circuit Description 2-2 2-1-4. Power Amplifier Module (PAM101:BGY290E) This chip is a GSM/EDGE compl iant quad band P ower amplifier module (PAM) w ith integrated pow er control loop (PCL).
SAMSUNG Proprietary-Contents may change without notice Circuit Description This Document can not be used with out Samsung's authorizat ion 2-3 A 32.768 kHz crystal oscilla tor which provides an a ccurate low clock frequency for the PCF 50603 and external circ uitry.
SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung's authorizat ion Circuit Description 2-4 In the Wrting process, WEn is fallen to low and it enables writing process to operate. Du ring reading process, OEn is fallen to low and it enables read ing process to operate.
SAMSUNG Proprietary-Contents may change without notice Circuit Description This Document can not be used with out Samsung's authorizat ion 2-5 VBAT33 via U618(XC6401EE2 7DR) which is a backup bat.
SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung's authorizat ion Circuit Description 2-6 DPRAM Memory(UME401:7 0P248L55) 4Kx16bit dual port RAM ● It is accessed by Phone and PDA, but not accesse d simultaneously.
SAMSUNG Proprietary-Contents may change without notice Circuit Description This Document can not be used with out Samsung's authorizat ion 2-7 Module(MOD800:LBWA1UDBD7-093) The Wi-Fi Module wh ich uses Philips Chip is m anufactur ed by MuRata. I t only suppor ts 802.
SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung's authorizat ion Circuit Description 2-8 IrDA(HSDL-3002) IrDA Data Complian t 115.2kbit/ s with Remot e Control Tra nsmission Inf rared Tran sceiver.
SAMSUNG Proprietary-Contents may change without notice 3. Exploded View and Parts List 3-1 This Document ca n not be used wi thout Samsun g's author ization 3-1.
SAMSUNG Proprietary-Contents may change without notice Exploded v iew and Part Li st 3-2 This Document ca n not be used wi thout Samsun g's author ization 3-2.
SAMSUNG Proprietary-Contents may change without notice Exploded view an d Part List 3-3 This Document ca n not be used wi thout Samsun g's author ization Description SEC CODE BAG PE 6902-000634 C.
SAMSUNG Proprietary-Contents may change without notice Exploded v iew and Part Li st 3-4 This Document ca n not be used wi thout Samsun g's author ization 3-3. Test Jig (GH80-03308A) 3-3-2. RF Test Cable (GH39-00261A) 3-3-3. Test Cable (GH39-00477A) 3-3-5.
SAMSUNG Proprietary-Contents may change without notice 4. Electrical Parts List 4-1 This Document ca n not be used wi thout Samsun g's author ization Ddsign LOC Discription SE C Code STATUS BTC60.
SAMSUNG Proprietary-Contents may change without notice Electrical Par ts List 4-2 This Document ca n not be used wi thout Samsun g's author ization Ddsign LOC Discription SE C Code STATUS C220 C-.
SAMSUNG Proprietary-Contents may change without notice Electrical Par ts List 4-3 This Document ca n not be used wi thout Samsun g's author ization Ddsign LOC Discription SE C Code STATUS C326 C-.
SAMSUNG Proprietary-Contents may change without notice Electrical Par ts List 4-4 This Document ca n not be used wi thout Samsun g's author ization Ddsign LOC Discription SE C Code STATUS C537 C-.
SAMSUNG Proprietary-Contents may change without notice Electrical Par ts List 4-5 This Document ca n not be used wi thout Samsun g's author ization Ddsign LOC Discription SE C Code STATUS C620 C-.
SAMSUNG Proprietary-Contents may change without notice Electrical Par ts List 4-6 This Document ca n not be used wi thout Samsun g's author ization Ddsign LOC Discription SE C Code STATUS C719 C-.
SAMSUNG Proprietary-Contents may change without notice Electrical Par ts List 4-7 This Document ca n not be used wi thout Samsun g's author ization Ddsign LOC Discription SE C Code STATUS C844 C-.
SAMSUNG Proprietary-Contents may change without notice Electrical Par ts List 4-8 This Document ca n not be used wi thout Samsun g's author ization Ddsign LOC Discription SE C Code STATUS L127 IN.
SAMSUNG Proprietary-Contents may change without notice Electrical Par ts List 4-9 This Document ca n not be used wi thout Samsun g's author ization Ddsign LOC Discription SEC Code STATUS R205 R-C.
SAMSUNG Proprietary-Contents may change without notice Electrical Par ts List 4-10 This Document ca n not be used wi thout Samsun g's author ization Ddsign LOC Discription SEC Code STATUS R431 R-.
SAMSUNG Proprietary-Contents may change without notice Electrical Par ts List 4-11 This Document ca n not be used wi thout Samsun g's author ization Ddsign LOC Discription SEC Code STATUS R705 R-.
SAMSUNG Proprietary-Contents may change without notice Electrical Par ts List 4-12 This Document ca n not be used wi thout Samsun g's author ization Ddsign LOC Discription SEC Code STATUS TA505 C.
SAMSUNG Proprietary-Contents may change without notice Electrical Par ts List 4-13 This Document ca n not be used wi thout Samsun g's author ization Ddsign LOC Discription SEC Code STATUS U408 IC.
SAMSUNG Proprietary-Contents may change without notice Electrical Par ts List 4-14 This Document ca n not be used wi thout Samsun g's author ization Ddsign LOC Discription SEC Code STATUS ZD506 D.
SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung's authorizat ion 5. Block Diagrams 5-1 PHONE RF PCF 5213 NOR FLASH 256Mb + ScRAM 64Mb PHONE Logic PHONE POWER IC PCF50603 Downloading(s erial) CPU 2.
SAMSUNG Proprietary-Contents may change without notice 6. PCB Diagrams 6-1 This Document ca n not be used wi thout Samsun g's author ization 6-1. Main PCB Top Diagram.
SAMSUNG Proprietary-Contents may change without notice PCB Diagrams 6-2 This Document ca n not be used wi thout Samsun g's author ization 6-2. Main PCB Bottom Diagram.
SAMSUNG Proprietary-Contents may change without notice PCB Diagrams 2-3 This Document ca n not be used wi thout Samsun g's author ization 6-3. SUB PCB Top Diagram.
SAMSUNG Proprietary-Contents may change without notice PCB Diagrams 6-4 This Document ca n not be used wi thout Samsun g's author ization 6-4. SUB PCB Bottom Diagram.
SAMSUNG Proprietary-Contents may change without notice 7. Flow Chart of TroubleShooting 7-1 This Document ca n not be used wi thout Samsun g's author ization 7-1. Power On PDA Part In U604 4pin = 3.0V , 23pin = 1.3V 25pin = 1.1V , 33pin = 1.4v Insert Power NG 2pin in U607 >3 .
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-2 This Document ca n not be used wi thout Samsun g's author ization L605 R627 R610 TA606 .
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-3 This Document ca n not be used wi thout Samsun g's author ization.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-4 This Document ca n not be used wi thout Samsun g's author ization PHONE Part Phone ON N.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-5 This Document ca n not be used wi thout Samsun g's author ization R434 3 1 2 5 4 C416 U.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-6 This Document ca n not be used wi thout Samsun g's author ization.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-7 This Document ca n not be used wi thout Samsun g's author ization GND 2 OUT 3 4 VCC 1 V.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-8 This Document ca n not be used wi thout Samsun g's author ization.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-9 This Document ca n not be used wi thout Samsun g's author ization 7-2.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-10 This Document ca n not be used wi thout Samsun g's author ization VB AT IR DA 30 C 202.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-11 This Document ca n not be used wi thout Samsun g's author ization.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-12 This Document ca n not be used wi thout Samsun g's author ization 7-3.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-13 This Document ca n not be used wi thout Samsun g's author ization R 202 R 205 C 209 C .
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-14 This Document ca n not be used wi thout Samsun g's author ization Reciever Working Ope.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-15 This Document ca n not be used wi thout Samsun g's author ization Mic Working Operate .
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-16 This Document ca n not be used wi thout Samsun g's author ization R516 R536 C584 2 Y3 .
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-17 This Document ca n not be used wi thout Samsun g's author ization Hands-Free Stereo He.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-18 This Document ca n not be used wi thout Samsun g's author ization C539 L506 L507 C521 .
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-19 This Document ca n not be used wi thout Samsun g's author ization 7-4.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-20 This Document ca n not be used wi thout Samsun g's author ization 3 4 5 6 2 3 4 5 6 ZD.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-21 This Document ca n not be used wi thout Samsun g's author ization 7-5.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-22 This Document ca n not be used wi thout Samsun g's author ization VBAT D603 3 1 2 MOTO.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-23 This Document ca n not be used wi thout Samsun g's author ization.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-24 This Document ca n not be used wi thout Samsun g's author ization 7-6.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-25 This Document ca n not be used wi thout Samsun g's author ization VB AT IR DA 30 C 202.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-26 This Document ca n not be used wi thout Samsun g's author ization.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-27 This Document ca n not be used wi thout Samsun g's author ization 7-7.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-28 This Document ca n not be used wi thout Samsun g's author ization R732 R759 Z D 7 0 8 .
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-29 This Document ca n not be used wi thout Samsun g's author ization.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-30 This Document ca n not be used wi thout Samsun g's author ization 7-8. WLAN Working Operate WLAN NG in U616 7pin = 1.8 V 6pin = 3.0V ? Check U616 & neighboring circ uits YES NO Change the Ant.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-31 This Document ca n not be used wi thout Samsun g's author ization 52 BTCX_RXIND 6 G N .
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-32 This Document ca n not be used wi thout Samsun g's author ization.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-33 This Document ca n not be used wi thout Samsun g's author ization 7-9. Bluetooth Working Operate Bluetooth NG 5pin = 3.0 V in U618? Check U618 & neighboring circ uits YES NO Change the Ant.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-34 This Document ca n not be used wi thout Samsun g's author ization VBT30 C853 R822 7 5 .
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-35 This Document ca n not be used wi thout Samsun g's author ization.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-36 This Document ca n not be used wi thout Samsun g's author ization 7-10. GSM Receiver U101 Pin7 >= -65dBm Resolder RFS101, C104, L123 END No Yes RX ON RF input : CH center freq : +67.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-37 This Document ca n not be used wi thout Samsun g's author ization 7-11. GSM Transmitter U101 Pin7 < 18dBm Resolder RFS101, C104, L123 TX ON (5Level) Check U101 pin4 = H (2.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-38 This Document ca n not be used wi thout Samsun g's author ization 7-12. DCS Receiver U101 Pin7 >= -65dBm Resolder RFS101, C104, L123 No Yes RX ON RF input : CH center freq : +67.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-39 This Document ca n not be used wi thout Samsun g's author ization 7-13.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-40 This Document ca n not be used wi thout Samsun g's author ization 7-14. PCS Receiver U101 Pin7 >= -65dBm Resolder RFS101, C104, L123 No Yes RX ON RF input : CH center freq : +67.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-41 This Document ca n not be used wi thout Samsun g's author ization 7-15.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-42 This Document ca n not be used wi thout Samsun g's author ization C134 GND 2 OUT 3 4 V.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-43 This Document ca n not be used wi thout Samsun g's author ization.
SAMSUNG Proprietary-Contents may change without notice F l o wC h a r to fT r o u b l e s h o o t i n g 7-44 This Document ca n not be used wi thout Samsun g's author ization.
8. Exploded and assembling View This Document can not be used without Samsung's auth orization SAMSUNG Proprietary- Conten ts may change Without notice 8-1 .
Exploded and assembling View This Document can not be used without Samsung's auth orization SAMSUNG Proprietary- Conten ts may change Without notice 8-2 .
Exploded and assembling View This Document can not be used without Samsung's auth orization SAMSUNG Proprietary- Conten ts may change Without notice 8-3 .
Exploded and assembling View This Document can not be used without Samsung's auth orization SAMSUNG Proprietary- Conten ts may change Without notice 8-4 SILK line agre ement confir m certainly.
Exploded and assembling View This Document can not be used without Samsung's auth orization SAMSUNG Proprietary- Conten ts may change Without notice 8-5 1) Press equally TAPE. 1) Fix so that there may not be MAIN PBA mov e. 2) Confirm whether POWE R KEY was put properly.
Exploded and assembling View This Document can not be used without Samsung's auth orization SAMSUNG Proprietary- Conten ts may change Without notice 8-6 names of goods CODE Specification quantity TAPE CONNECTOR GH74-20587 A 5 X 19 X T0.
Exploded and assembling View This Document can not be used without Samsung's auth orization SAMSUNG Proprietary- Conten ts may change Without notice 8-7 names of goods CODE Specification quantity TAPE CONNECTER GH74-20587 A 5 X 19 X T0.
Exploded and assembling View This Document can not be used without Samsung's auth orization SAMSUNG Proprietary- Conten ts may change Without notice 8-8.
Samsung El ectronics Co.,Ltd. May. 2006 Printed in Korea. Code No.: GH68- 11275A BASIC. This Service Manu al is a propert y of Samsung Elect ronics Co.,Ltd . Any unauthoriz ed use of Manual ca n be punished under app licable Internati onal and/o r domestic law.
An important point after buying a device Samsung SGH-I750 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Samsung SGH-I750 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Samsung SGH-I750 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Samsung SGH-I750 you will learn all the available features of the product, as well as information on its operation. The information that you get Samsung SGH-I750 will certainly help you make a decision on the purchase.
If you already are a holder of Samsung SGH-I750, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Samsung SGH-I750.
However, one of the most important roles played by the user manual is to help in solving problems with Samsung SGH-I750. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Samsung SGH-I750 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
