Sharp SGH-J200 manual Key Back Light

Page 54

Flow Chart of Troubleshooting

9-13. Key Back Light

Key Backlight does not work

Yes

No

Is BACKLIGHT set

AlwaysON in the Menu?

Yes

No

VKEY_3.3V ≒ 3.3V?

Yes

END

Set BACKLIGHT on AlwaysON

Replace or Resolder U600

9-23

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

Image 54

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 Rear Cover separation Disassembly and Assembly InstructionsScrew remove MIC separationPBA separation KEY PAD exclusionImage that is parted PBA ASS Y JOG KEY PAD separation Speaker exclusion SMD Shield can separationMotor exclusion 3MEGA Camera separation3MEGA Camera exclusion Bracket separationAnti-loose Tape 1 exclusion Anti-loose Tape 2 exclusionVGA Camera exclusion LCD Module exclusionLCD Soldering Part exclusion Electric Sponge 1 exclusion Electric Sponge 2 exclusionKEY Dome Sheet exclusion KEY Dome Sheet attachment Electric Sponge 1 attachmentElectric Sponge 2 attachment Do MIC Soldering on PBA lower column LCD Module Soldering preparationDo Speaker Soldering on the PBA top portion To right and left side Do Soldering LCD F-PCB to PBAAnti-loose Tape 1 attachment LCD Module attachmentState that LCD Module attaches VGA Camera Combination Attach anti-loose Tape on VGA Camera Connetor3MEGA Camera Combination Bracket assembly3MEGA Camera Combination Anti-loose Tape 2 attachment Assemble Bracket to PBAMotor Combination VGA Camera assemblySpeaker Combination Shield CAN1 CombinationMIC Holder Combination Shield can 2 CombinationJOG KEY PAD Combination State that become PBA ASS YFront Hook check MIC Combination KEY PAD CombinationPBA ASS Y Combination Combine 3*4 KEY PAD to FrontMain Window attachment Rear Cover assemblySET assembly Screw Combination