Microphone Trouble - LG -T300 Service Manual

4. TROUBLE SHOOTING

4.11 Microphone Trouble

TEST POINT
C107
C112
CIRCUIT
U102
AD22
A22
T3
AD23
A23
N4
AD24
A24
K4
nROM_CS
CS0_N
M3
nRAM_CS
CS1_N
R3
nADV
ADV_N
J6
nWAIT
WAIT_N
P9
ANAMON
VMIC
T2
MEM_CLK
BFCLK0
K15
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
U102
LGE Internal Use Only
U102
C113
Figure 4.12
VHSMIC
C143 C140 C142 C141
DNI DNI 47p 47p
C107 C131 C116 C114 C112 C113
1n 1n 47p 47p 47p 47p
PLACE THESE CAPS NEAR BB IC
2. TROUBLE SHOOTING
MICROPHONE
EPN
EPP
HSL
TP02
HSR
C224 33n
MIC_P
C209
TP02
MIC_N
DNI
MIC_P
C219 33n
HS_MIC_N
MIC_N
HS_MIC_P
TP0
TP03
- 94 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
TP01 :
R217
TP02 :
C224
TP03 :
C219
MIC201
TP01
VMIC
TP01
R217
1K
R202
C202 C212
2.2K
39p 10u
R206 100
C214
39p
R207 100
R232
C208 C213
2.2K
39p 39p
VA203
Only for training and service purposes
2
1
MIC201
VA204