LG Electronics U250 Checking Front-End Module Block, Schematic of the Front-End Module Block

4. TROUBLE SHOOTING

4.5 Checking Front-End Module Block
		TP1
	Rev.D		U500	11			Rev.C
	L108	19		ANT		5
VREG_RF_SMPS	15nH		VDD		GSM900_RX1
					GSM900_RX2	6
	C117					1
Rev.B					GSM1800_RX1	2
	10p				GSM1800_RX2
		7	GND1			3
		8			GSM1900_RX1	4
			GND2		GSM1900_RX2
		10	GND3		WCDMA2100	9
		12	GND4					1K	R100
		13	GND5	D5011	CTRL1	18				ANT_SEL0
		15	GND6		CTRL2	22		1K	R101	ANT_SEL1
		17	GND7
		20
		21	GND8			16
		23	GND9		GSM900_TX	14	C110	C109
			GND10	GSM18001900_TX
							33p	33p

Schematic of the Front-End Module Block

TP1

ANT_SEL0

ANT_SEL1

Test Point of the Front-End Module Block

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