Receiver Trouble - LG -C300 Service Manual

4. TROUBLE SHOOTING

4.11 Receiver Trouble

TEST POINT
C142_TP1
CIRCUIT
AD21
A_D21
J3
A_D22 AD22
T3
A_D23
AD23
N4
A_D24
AD24
K4
NROM_CS
CS0_N
M3
CS1_N NRAM_CS
R3
NADV
ADV_N
J6
NWAIT
WAIT_N
P9
ANAMON
T2
BFCLK0 MEM_CLK
K15
VDDP_DIG1
FSYS_EN
FSYS_EN
M15
EPN
M16
EPP
R14
HSL
T14
HSR
N16
LSN
N15
LSP
R12
MICN1
T12
MICP1
R13
MICN2
T13
MICP2
P12
VMIC
P13
VUMIC
R10
ACD
P11
AGND
T10
VREF
A16
C105
NC1
T16
220n
NC2
A1
NC3
T1
NC4
LGE Internal Use Only
C143_TP2
VMIC VHSMIC
C144 C136
DNI DNI
TP2
TP2
C102 C127 C112 C110 C108 C109
1n 1n 47p 47p 47p 47p
PLACE THESE CAPS NEAR BB IC
C245_TP3
Figure 4.11
MAIN RECEIVER
TP1
RCV_P
RCV_N
C143 C142
47p 47p
TP1
TP4
RCV_N
RCV_P
EAR_SPK_N
EAR_SPK_P
MIC_N
MIC_P
HS_MIC_N
HS_MIC_P
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Copyright © 2010 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
C246_TP4
Receiver
pad
TP3
TP
0.1uH
L205
TP4
L206 0.1uH
C246 C245 VA208
47pF 47pF
ICVL0518100Y500FR ICVL0518100Y500FR
Only for training and service purposes
CN204
1
2
SURY0013401
VA207