Sharp SGH-T519 manual GSM1800 RX

Page 73

Flow Chart of Troubleshooting

10-2-2. GSM1800 RX

Continuous RX ON

RF Input : 62 CH

AMP : -50dBm

			①
NORMAL CONDITION	NO		Check soldered status of
NORMAL CONDITION			Check soldered status of
Catch the channel ?			L103, C101, C104, L101
YES
			②
F100 Check	NO		RFS101, C100
F100 Check			RFS101, C100
Pin #17 ≥ -65dBm ?			Resolder or Change
YES
			③
F100 Check	NO		F100 Resolder or Change
Pin #3,4 ≥ -65dBm ?			F100 Resolder or Change
YES
YES

NO

UCD100 Check

Pin#8,9 ≥ -65dBm ?

YES

NO

UCD100 Check

Pin#27 =1.8V ?

YES

④

Check soldered status of R135, R136, L106

CHECK UCD301

UCD100 Check			NO
Pin#34 =Clean 2.8V?
	YES
UCD100 Check			NO
Pin#35,36,37,38=100mV?
	YES
	YES
			UCD100 Check	NO
			Pin #21 : 26MHz ?	NO
			Pin #21 : 26MHz ?
			Vpp : 1.1V?
			YES
		⑥

			UCD100
			Change or resolder

⑤

C113, UCD301

Check or resolder

TCX101 Check		NO
Pn#3 : Freq =26MHz,
Vpp=1.2V?
YES

UCD100
Check & resolder

⑦

TCX101

Check & resolder

Check UCD301

10-27

SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

Image 73

Contents GSM Telephone Contents PCB Diagrams Block Diagrams Code No. GH68-12034A 2006 . Rev.1.0 Repair Precaution Safety PrecautionsESDElectrostatically Sensitive Devices Precaution General Introduction SpecificationGSM General Specification SpecificationPower GSM850 Control GSM TX power classPower GSM850 Control Level Edge TX Power LevelMain Function Product FunctionRF Circuit Description of SGH-T519 Circuit DescriptionBaseband Circuit description of SGH-D407 Power AMP PAM400WM8955LUCD401 Samsung Proprietary-Contents may change without notice Calibration Program Test Command & Test ProcedureTx Power Tune up Procedure Samsung Proprietary-Contents may change without notice Samsung Proprietary-Contents may change without notice Array course control Pre-requsite for Downloading Downloading Binary FilesS/W Downloader Program Samsung Proprietary-Contents may change without notice Select theFlash&Verify Browse #1234# Cellular phone Exploded View Exploded View and its PartslistCellular phone Parts list CBF INTERFACE-DATA Link Cable Disassembly Disassembly and Assembly instructionsDetach a LCD from LCD braket Assembly Absorber PBA Solder the intenna Place the camera SCREW.4 Point IC-POSI.FIXED REG Main Electrical Parts ListIC-POWER Supervisor 2007-000157 R428 2007-007316 R304 CER,CHIP 2203-000254 C213 2203-005061 C451 2203-006121 C306 2203-006423 C301 TA,CHIP OSCILLATOR-VCTCXO Power on Flow Chart of Troubleshooting10-2 Flow Chart of Troubleshooting 10-3 YES END Initial10-5 Voltage is 2.8V at C306? Sim Part10-7 LCD Display part 10-9 10-10 Microphone Part 10-12 YES Speaker Part10-14 Flow Chart of Troubleshooting 10-15 Receiver Part Flow Chart of Troubleshooting 10-17 Camera part 10-19 Flow Chart of Troubleshooting 10-20 10-1-9. Mp3 part 10-22 Flow Chart of Troubleshooting 10-23 Flow Chart of Troubleshooting 10-24 GSM900 RX 10-2. RFFlow Chart of Troubleshooting 10-26 GSM1800 RX GSM1900 RX GSM850 RX GSM850 / GSM900 TX Flow Chart of Troubleshooting 10-31 DCS1800 & PCS1900 TX 10-33 Fpcvol PCB Diagrams140 Block Diagrams Reference Abbreviate Reference data