LG KB770 Service Manual page 128

R620
200K
TCC_PWR_EN EN
4
FB
5
PGND
6
MIC23031-AYMT
U603
R1131D261D
6
CE
5
GND
4
NC2
( 300mA )
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Only for training and service purposes
TP1
R621
200K
SNS R623 0
3
TCC_1.2V_CORE
SW
L600 4.7uH
2
+VPWR
VIN
1
U602
C619 C620
4.7u 2.2u
TP2
TCC_2.6V_MISC
TCC_2.6V_SDR
+VPWR
1
VDD
2
NC1
R629
3
VOUT
0
C624 C626
C625
2.2u 1u
1u
TP4
TP2 TP1
R700
200K
DIB_DCDC_EN EN
4
FB
5
PGND
6
MIC23031-AYMT
6
DIB_LDO_EN _CE_OR_CE
5
GND
4
NC2
R1131D181D
+1.0V_DVB_CORE
0.9857V
R706
200K
DIB_PWR_EN EN SNS
4 3
FB SW
5 2
PGND VIN
6 1
MIC23031-AYMT U702
TP3
- 129 -
4. TROUBLE SHOOTING
+1.8V_DVB_RF
R701
390K
TP3
SNS
3
SW
L700 4.7uH
2 +1.8V_DVB_PLL
+VPWR
VIN
1
U700
C702
4.7u
L701
1 33nH
+VPWR
VDD
2
NC1
R712
3
VOUT
DNI
C707
U703
1u
TP4
R707
121K
R721
L702 4.7uH
+VPWR
0
C703
C705 2.2u
4.7u
LGE Internal Use Only
+1.8V_DVB_RF
C708
C730
2.2u
2.2u
+1.0V_DIB_MAC
+1.0V_DIB_CORE