Fm Radio Trouble - LG GB220 Service Manual

4.17 FM Radio Trouble

TEST POINT
CIRCUIT
0
K
1 2.2K
04 C307
47p
TH0005601
8D106X0010M2T
USB_DP
USB_DM
R310 47
JACK_DET
RPWRON
DSR
R312 47
UART_TX
R313 47
UART_RX
USB_DP
USB_DM
LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C300
R310
VBUS_USB 1V81_VDD
L301 1800
RPWRON
DSR
UART_TX
UART_RX
C320
4.7u
VCHG
FB300
SFEY0007101
ICVFP10181E301FR
OUT IN
GND2 GND1
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 105 -
4. TROUBLE SHOOTING
C300
0.015u
C301
L300
1p
270nH
VBAT
CN300
R302
21
2.2
19
1
2
2 : Headset MIC
3
4
4 : HSO_L
5
5 : HSO_R
6
6 : USB+
7
7 : USB-
8
8 : JACK_D
9
9,10 : BATT
10
11
11 : R/ON
12
12,13 : CHG
13
14
14 : DSR
15
15 : VUSB
16
16 : D/ TX
17
17 : D/ RX
18
20
22
GU041-18P-E1000
ENRY0006801
LGE Internal Use Only
FM_ANT