LG KM500 Service Manual page 54

4.3.1 Checking BT Antenna
4.3.1.1 Visual Inspection
<Fig. 23> BT Antenna
4.3.1.2 Checking BT VRIO
Checking pin
A3,D8,D6(C200)
Check 1.8V High
YES
Check BT_CLK
4.3.1.3 Checking BT_VBAT
Checking C201
(G7,H3,F5)
YES
Check 4.2V High
YES
Check BT_NRST
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Only for training and service purposes
TP1_BT
BT_CLK_REQ
RFIO_OUT
C206 C207 C208 C209 C210
1u 1u 1u 1u
NO
Check ABB
- 55 -
4. Trouble Shooting
VRIO VBAT
C200 C201
0.1u 0.1u
D7
IO0_EXT_CLK_REQ_OUT
C6
IO1
B7
IO2
D5
IO3_SDA JTAG_TDI
A6
IO4 JTAG_TDO
C4
IO5 JTAG_TMS
C8
IO7 JTAG_TCK
B4
IO14
U200
F7
IO15_EXT_CLK_REQ_IN
A1
IO16
BRF6300
G4
IO17_SCL
F2
RFIO_LDO_OUT XTALP_FAST_CLK_IN
G3
OSC_LDO_OUT
D2
ANA_LDO_OUT
H5
F_LDO_OUT AUD_FSYNC
A4
BB_LDO_OUT1 AUD_OUT
F8
BB_LDO_OUT2 AUD_CLK
1u
TP1_BT
TP2_BT
TP2_BT
BT_NRST
CLK_32K
1.5nH
L201
DBF71B001 FL200
4
C203
B2
H1
RFP 1.5p
H2 3
RFM B1
C3
1.5nH
E6
L202
B5
D4
E5
HCI_TX BT_RX
E4
HCI_RX BT_TX
E8
HCI_CTS BT_RTS
E7
HCI_RTS BT_CTS
E2
BT_CLK
E1
XTALM C205 1000p R201 1.5K
C5
AUD_IN MCSI1_DOUT
A7
MCSI1_SYNC
C7
MCSI1_DIN
B6
MCSI1_BCLK
TP3_BT
UART_TXD
C200(1.8v)
C201(4.2v)
LGE Internal Use Only
1
UB
2
DC