Sharp SGH-J200 manual LCD Back Light

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Flow Chart of Troubleshooting

9-12. LCD Back Light

Backlight does not work

Yes

Is BACKLIGHT set

AlwaysON in the Menu?

Yes

C627 ≥ 3.5V

Yes

U603 Pin 10, 11, 12 ='H'?

Yes

Replace the LCD

Yes

END

No

No

No

Set BACKLIGHT on Always ON

Replace or Resolder U603

Check UCP300, U603

9-21

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 CISSafety Precautions Repair PrecautionESDElectrostatically Sensitive Devices Precaution Specification Egsm DCS1800 PCS1900GSM Tx Power Class TX Power GSM900 DCS1800 PCS1900 Control levelProduct Function Main FunctionProduct Function Software Adjustments Array course controlDownloading Binary Files Pre-requsite for Downloading3. S/W Downloader Program RED ScreenSelect the binary file what you want to download Samsung Proprietary-Contents may change without notice Exploded View and Parts List Cellular phone Exploded ViewCellular phone Parts List SCREW-TAPPING Samsung Proprietary-Contents may change without notice Main Electrical Parts List StatusTA,CHIP C324 C426 COUPLER-DIRECTION DIODE-ZENER CRYSTAL-SMD R300 CONNECTOR-COAXIAL SWITCH-TACT Block Diagrams RF Solution Block DiagramBase Band Solution Block Diagram MSM6245PCB Diagrams Bottom Flow Chart of Troubleshooting Power OnFlow Chart of Troubleshooting Initial Charging Part Samsung Proprietary-Contents may change without notice SIM Part Samsung Proprietary-Contents may change without notice Microphone Part Phone MIC Samsung Proprietary-Contents may change without notice Microphone Part Earphone MIC Samsung Proprietary-Contents may change without notice Earphone Part Samsung Proprietary-Contents may change without notice Speaker Part Samsung Proprietary-Contents may change without notice Key Data Input LCD part Samsung Proprietary-Contents may change without notice Camera part Samsung Proprietary-Contents may change without notice LCD Back Light Samsung Proprietary-Contents may change without notice Key Back Light Samsung Proprietary-Contents may change without notice GSM Receiver RX onSamsung Proprietary-Contents may change without notice GSM Transmitter Samsung Proprietary-Contents may change without notice DCS Receiver Samsung Proprietary-Contents may change without notice DCS Transmitter Samsung Proprietary-Contents may change without notice PCS Receiver Samsung Proprietary-Contents may change without notice PCS Transmitter Samsung Proprietary-Contents may change without notice Wcdma Receiver Samsung Proprietary-Contents may change without notice Wcdma Transmitter Samsung Proprietary-Contents may change without notice Reference data Reference AbbreviateReference data 10-2 Disassembly and Assembly Instructions Screw removeRear Cover separation MIC separationKEY PAD exclusion PBA separationImage that is parted PBA ASS Y JOG KEY PAD separation SMD Shield can separation Motor exclusionSpeaker exclusion 3MEGA Camera separationBracket separation Anti-loose Tape 1 exclusion3MEGA Camera exclusion Anti-loose Tape 2 exclusionLCD Module exclusion VGA Camera exclusionLCD Soldering Part exclusion Electric Sponge 2 exclusion Electric Sponge 1 exclusionKEY Dome Sheet exclusion Electric Sponge 1 attachment KEY Dome Sheet attachmentElectric Sponge 2 attachment LCD Module Soldering preparation Do Speaker Soldering on the PBA top portionDo MIC Soldering on PBA lower column To right and left side Do Soldering LCD F-PCB to PBALCD Module attachment State that LCD Module attaches VGA Camera CombinationAnti-loose Tape 1 attachment Attach anti-loose Tape on VGA Camera ConnetorBracket assembly 3MEGA Camera Combination Anti-loose Tape 2 attachment3MEGA Camera Combination Assemble Bracket to PBAVGA Camera assembly Speaker CombinationMotor Combination Shield CAN1 CombinationShield can 2 Combination JOG KEY PAD CombinationMIC Holder Combination State that become PBA ASS YKEY PAD Combination PBA ASS Y CombinationFront Hook check MIC Combination Combine 3*4 KEY PAD to FrontRear Cover assembly SET assemblyMain Window attachment Screw Combination