Sharp SGH-F250 manual Safety Precautions, Repair Precaution

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1. Safety Precautions

1-1. Repair Precaution

Repair in Shield Box, during detailed tuning. Take specially care of tuning or test,

because specificity of cellular phone is sensitive for surrounding interference(RF noise).

Be careful to use a kind of magnetic object or tool,

because performance of parts is damaged by the influence of magnetic force.

Surely use a standard screwdriver when you disassemble this product, otherwise screw will be worn away.

Use a thicken twisted wire when you measure level.

A thicken twisted wire has low resistance, therefore error of measurement is few.

Repair after separate Test Pack and Set because for short danger (for example an overcurrent and furious flames of parts etc) when you repair board in condition of connecting Test Pack and tuning on.

Take specially care of soldering, because Land of PCB is small and weak in heat.

Surely tune on/off while using AC power plug, because a repair of battery charger is dangerous when tuning ON/OFF PBA and Connector after disassembling charger.

Don't use as you pleases after change other material than replacement registered on SEC System. Otherwise engineer in charge isn't charged with problem that you don't keep this rules.

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SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

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Contents GSM Telephone Country Web Site Repair Precaution Safety PrecautionsESDElectrostatically Sensitive Devices Precaution GSM General Specification SpecificationTX Power GSM850 DCS1800 PCS1800 Control level GSM Tx Power ClassMain Function Product FunctionProduct Function Software Adjustments Array course controlRF CABLEGH39-00599A Test CABLE-1.5MGH39-01022A Test CABLE-0.4MGH39-01020APre-requsite for Downloading Software DownloadingSamsung Proprietary-Contents may change without notice Cellular phone Exploded View Exploded View and Parts ListSEC Code Cellular phone Parts ListQFU01 Assy CASE-SLIDE Upper BAG PE Status Main Electrical Parts List2007-000162 R218 Chip SNA 2203-005050 C403 TA,CHIP CRYSTAL-SMD SOCKET-INTERFACE Samsung Proprietary-Contents may change without notice BaseBand Solution Block Diagram Block DiagramsRF Solution Block Diagram - Main top view PCB Diagrams- Main bottom view Power On Flow Chart of TroubleshootingFlow Chart of Troubleshooting Samsung Proprietary-Contents may change without notice Initial Samsung Proprietary-Contents may change without notice Charging Part Samsung Proprietary-Contents may change without notice Samsung Proprietary-Contents may change without notice Sim Part Samsung Proprietary-Contents may change without notice Microphone Part Samsung Proprietary-Contents may change without notice Samsung Proprietary-Contents may change without notice Samsung Proprietary-Contents may change without notice Spkp & Spkn High Speaker PartMelodySamsung Proprietary-Contents may change without notice Samsung Proprietary-Contents may change without notice Key Data Input Back Light for Color Main LCD Key Back Light Camera part Radio part Samsung Proprietary-Contents may change without notice RX on GSM ReceiverDCS Receiver PCS Receiver Samsung Proprietary-Contents may change without notice Samsung Proprietary-Contents may change without notice MODULE100 GSM TransmitterDCS Transmitter PCS Transmitter Samsung Proprietary-Contents may change without notice Bluetooth part Samsung Proprietary-Contents may change without notice Reference Abbreviate Reference data10-2 Disassembly Instructions Disassembly and Assembly InstructionsFpcb Connector Samsung Proprietary-Contents may change without notice Assembly Instructions Hook Samsung Proprietary-Contents may change without notice