LG D337 - Page 52

4. DOWNLOAD
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Copyright © 2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
0
R1505
21
0R1506
1u
C1500
1
2
470nC1501
470nC1502
470nC1503 470nC1504
+2V8_MTK_VTCXO
470nC1505
C1506 470n
+1V8_MTK_VIO
+2V8_MTK_VTCXO
+1V825_MTK_VRF
VTXHF
VRXHF
VTCXO28
VXODIG
V28
2GHB_TX
2GLB_TX
VRXLF
VTXLF
AVDD_VIO18
GND9
GND10
GND11
GND12
GND13
GND14
H9H4H3G9G4G3K6J11L7
A11
B8
E10K7 K1F2 B11
2G_TX_HB
2G_TX_LB
12mil(100mA) 12mil(125mA) 10mil(35mA)
10mil(35mA)
4. Trouble Shooting
3.3.1.1 Checking DC Power supply circuit
Test PointTest Point
TP5 R1506
TP1 : C1506
(+1V825_MTK_VRF )
TP4: C1503
(+1V825_MTK_VRF )
TP5
:
R1506
(+2V8_MTK_VTCXO)
TP2: C1505
(+1V825_MTK_VRF )
MT6166
(U1500)
Circuit Diagram
TP3 : C1504
(+1V825_MTK_VRF )
TP2
TP4
TP5
TP1
TP3
TP2
TP4
TP5
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TP2
TP4
TP1
TP3
TP5