Samsung SCH-i830 service manual free download

File name Samsung SCH-i830 service manual.pdf

CDMA TELEPHONE SCH-i830 CDMA TELEPHONE CONTENTS 1. General Introduction 2. Circuit Description 3. Installation 4. NAM Programming 5. Product Support Tools 6. Test Procedure 7. Flow Chart of Troubleshooting 8. Exploded View/ Disassembly and Assembly Instructions 9. Block Diagram 10. Electrical Parts List 11. PCB Diagrams Samsung Electronics Co.,Ltd. August. 2006 Printed in Korea. This Service Manual is a property of Samsung Electronics Co.,Ltd. Any unauthorized use of Manual can be punished under applicable Code No.: GH68-12640A International and/or domestic law. BASIC. 1. General Introduction 1-1 General Instruction The SCH-i830 enable mobile users to communicate 3G CDMA2000 1X, 1X EVDO 2G GSM service into a single handset. For CDMA/PCS mode, The SCH-i830 supports Release A of the CDMA2000 1X standard, offering data rates of up to 307 kilobits per second (kbps) on both the forward and reverse links, along with simultaneous voice and data services. For The GSM/DCS/GPRS mode, The SCH-i830 supports voice service, data service and SMS in EGSM900 and DCS1800. So, The SCH-i830 may be the first PDA phone in the world that works on North American CDMA networks and also GSM networks overseas. This stylish bar phone also supports a VGA color displays, Bluetooth, SMS, Email, voice dialing, and airplane mode. 1-1 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization General Introduction 1-2 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization 2. Circuit Description 2-1. Logic Section 2-1-1. Power Supply For the POWER ON, the PHONE_ON pulse signal for 1 second from PDA turns on U900 (PM6650) The pin 29, 33, 35, 41, 52, 54, 65, 71, 83 of U900(PM6650) are the inputs of all r egulators on the phone. Simultaneously, MSM sends out PS_HOLD(logical HIGH) to turn on the p in 57 of U900(PM6650) even after the PHONE_ON signal is released. For the POWER OFF, by pressing POWER KEY of the phone application, the MSM output LOW on the PS_HOLD. The regulated voltage(U900,VREG_MSMC, VRGE_MSME, VREG_MSMP ) is used in the digital part of MSM The regulated voltage(U900,VREG_MSMA) is