LG GB220 - FM Radio Trouble

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4.17 FM Radio Trouble
TEST POINT
CIRCUIT
C300
R310
16 : D/ TX
17 : D/ RX
14 : DSR
11 : R/ON
9,10 : BATT
15 : VUSB
2 : Headset MIC
6 : USB+
12,13 : CHG
7 : USB-
4 : HSO_L
8 : JACK_D
5 : HSO_R
R305
100K
0
4
8
D106X0010M2T
T
H0005601
VA302
VBUS_USB
VBAT
R312 47
L301 1800
R310 47
C316 2.2u
1V81_VDD
47R313
C318 39p
VCHG
VA300
RPWRON
100K
R306
C307
47p
7
8
9
ICVS0505500FR
SEVY0005402
VA301
11
12
13
14
15
16
17
18
19
2
20
21
22
3
4
5
6
ENRY0006801
GU041-18P-E1000
CN300
1
10
100K R323
0
K
1uC319
DSR
UART_RX
UART_TX
DNI_DIODE_1006 diode
D303
C317 39p
2.2
R302
2.2K1
R309
DNI
4.7u
C320
L300
270nH
ICVFP10181E301FR
FB300
GND1GND2
INOUT
SFEY0007101
C301
1p
C300
0.015u
DSR
RPWRON
USB_DM
USB_DP
USB_DM
UART_RX
JACK_DET
UART_TX
FM_ANT
USB_DP