3. TROUBLE SHOOTING
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3.5.2.3 Checking RF signal path
4. Trouble Shooting
4. 5. GSM RF Part
4 5 2 GSM850/900/1800/1900 Tx
4. 5. 2. GSM850/900/1800/1900 Tx
4. 5. 2. 3.
Checking RF signal path
Test Point
TP3
TP4
U1300
TP3
U1500
U1300
TP2
TP1
TP2 (C1327)
Circuit Diagram
TP1 (C1326)
TP4 (C1322)
29
TP3 (C1325)
L1320
22n
L1321
0.5p
L1319
DNI
DNI
L1318
FEMID_TX_GSMLB
FEMID_TX_GSMHB
G1800/G1900
G850/G900
C1326
1.8n
1.2n
C1327
33p
C1325
DNI
L131
7
C1321
33p
33p
C1322
DNI
L1314
WTR0_TX_MB2_OUT
C1324
33p
WTR0_TX_LB2_OUT
ATT, EU
GSM_HB
GSM_LB
TP2 (C1327)
TP1 (C1326)
TP4 (C1322)
TP3 (C1325)