Sharp SGH-F250 manual DCS Receiver

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Flow Chart of Troubleshooting

9-13. DCS Receiver

RX ON

Cell Power : -60dBm

Yes

MODULE100 Pin13≥

-65dBm

Yes

MODULE100 3,4

≥ -68dBm

Yes

U100

pin D7 ≥ -70dBm pin E7 ≥ -70dBm

Yes

U100 pin

C2,B1,B2,A1

≥ 0.2Vp_p

Yes

No

No

No

No

①

Resolder

MODULE100,C102,L102

No

Check MODULE100

pin9,pin11 = L

Yes ②

③

Resolder L106,L105,L108

	U100 pin	No
	G4,F3,D6,C5,B3,A5,	No
	G4,F3,D6,C5,B3,A5,
	F1 29,32,33,36 ≥
	F1 29,32,33,36 ≥
	2.8V
	pin C1 ≥2.9V

Check ANT Switch

control circuit

Resolder MODULE100

④

Check & Resolder

C115,C116,C117,C114

And PMU Part

Check UCP200

END

⑤

Yes

Resolder U100

9-25

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

Image 53

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 RF CABLEGH39-00599A Software AdjustmentsArray course control 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