LG 357 Repair Manual Download
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LG 357 is a mobile phone assembled by the Japanese company LG. The following free downloadable pdf document is a service manual for LG 357 Mobile Phone repair manual. The LG357 phone has been designed to operate on the latest digital mobile communication technology, Code Division Multiple Access (CDMA). This CDMA digital technology has greatly enhanced voice clarity and can provide a variety of advanced features. Currently, CDMA mobilecommunication technology has been commercially used in Cellular and Personal Communication Service (PCS). The difference between them is the operating frequency spectrum. Cellular uses 800Mhz and PCS uses 1.9Ghz. The LG357 support GPS Mode, we usually call it tri-band phone. Also, LG357 works on Advanced Mobile Phone Service (AMPS). We call it quad-mode phone. If one of the Cellular, PCS and AMPS base stations is located nearby, Call fail rate of triple-mode phone is less than dual-mode phone or single-mode phone. The CDMA technology adopts DSSS (Direct Sequence Spread Spectrum). This feature of DSSS enables the phone to keep communication from being crossed and to use one frequency channel by multiple users in the same specific area, resulting that it increases the capacity 10 times more compared with that in the analog mode currently used. Soft/Softer Handoff, Hard Handoff, and Dynamic RF power Control technologies are combined into this phone to reduce the call being interrupted in a middle of talking over the phone.
The service manual is divided and organized into the following topics : system introduction, features and advantages of CDMA phone, structure and functions of Dual band CDMA phone, specifications, installation, NAM input method, circuit description, radio frequency transmit/receive part, digital/voice processing part, troubleshooting, glossary, safety, how to download, appendix, and the LG 357 schematic diagram. For more details about the service guide, download the pdf document from the following source :
LG 357 SERVICE REPAIR MANUAL AND GUIDE DOWNLOAD
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