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MCE62492901<br />

ANT1202 ANTENNA<br />

FEED<br />

MCE62492901<br />

ANT1203 ANTENNA<br />

L1212<br />

100p<br />

FEED<br />

LU1_LU4_DRX<br />

LGE Internal Use Only<br />

C1208 100p<br />

C1210<br />

DNI<br />

C1211<br />

DNI<br />

TP2<br />

C1221 1n<br />

Schematic of UMTS Band1/4 RF DRX Level.<br />

START<br />

No<br />

Check TP1 Signal exist? Check RF(M/S)<br />

Yes<br />

Check TP2<br />

Signal exist?<br />

Yes<br />

Check TP3<br />

Signal exist?<br />

Yes<br />

VA1201<br />

TP1<br />

1p<br />

C1222<br />

L1220<br />

1.8n<br />

Check WTR1605L<br />

C1209 1n<br />

L1208<br />

10n<br />

5<br />

4<br />

G2 O2<br />

IN<br />

1 G1 O1<br />

FL1202 2 3<br />

LU2_DRX<br />

No<br />

No<br />

- 108 -<br />

8<br />

7<br />

6<br />

5<br />

RF3<br />

GND2<br />

RF4<br />

GND1<br />

Check SP4T(U1201)<br />

Check SAW(FL1202)<br />

4. TROUBLE SHOOTING<br />

U900_DRX<br />

L1209<br />

9<br />

10<br />

11<br />

12<br />

RF5<br />

GND3<br />

ANT<br />

GND4<br />

U1201<br />

V1<br />

V2<br />

V3<br />

VDD<br />

4<br />

3<br />

2<br />

1<br />

DRX_SEL_0<br />

DRX_SEL_1<br />

DRX_SEL_2<br />

VDD_RF_SW<br />

DNI<br />

C1213 C1214 C1215 C1216<br />

10n 100p 100p 100p<br />

LU1_LU4_DRX<br />

L1222 100p<br />

L1230<br />

100p<br />

L1225<br />

DNI<br />

RF1<br />

GND5<br />

RF2<br />

NC<br />

PGND<br />

L1223 1.8n<br />

L1231<br />

13<br />

14<br />

15<br />

16<br />

17<br />

LTE_AWS & UMTS_1 DRX<br />

TP3<br />

1.8n<br />

DRX_LU2100_L4_L7_INM<br />

DRX_LU2100_L4_L7_INP<br />

Copyright © 2012 LG Electronics. Inc. All right reserved.<br />

Only for training and service purposes

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