LG KE520 Service Manual page 144

7. CIRCUIT DIAGRAM
VRIO VRIO
R500 R501
0 0
C502 C503
2.2u 2.2u
SYS_CLK_REQ
OJ500 OJ501 OJ502 OJ503
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C500
47u
RWFS-T001A
U500
1
VSW
2
VFB
3
VDDIO
4
VDDHOSTIF
5
GND1
C504 220p
6
WLAN_SYSCLK CLK_IP
R504 0 7
CLK_32K SLEEP_CLK
TP501 8
WLAN_IRQ WLAN_IRQ
9
HOSTIF_LVL_SEL
10
WLAN_DEBUG_RX RS232_RX
11
GND2
R505
12
WLAN_DEBUG_TX RS232_TX
10K TP502 13
SDIO_D1 SDIO_D1
TP503 14
SDIO_D2 SDIO_D2 BT_WAKEUP_BTSDIO_CLK
TP505 15
SDIO_CMD SPI_DIN_SDIO_CMD HOST_WAKE
TP507 16
SDIO_CLK SPI_CLK_SDIO_CLK
TP508 17
SDIO_D3 SPI_CSX_SDIO_D3
TP509 18
SDIO_D0 SPI_DOUT_SDIO_D0
19
SYS_CLK_REQ EXT_CLK_REQ
20
GND3 BT_SHUTDOWN
TP510 21
MCSI1_DOUT AUD_IN HCI_RX_BTSDIO_CMD
TP511 22
MCSI1_DIN AUD_OUT HCI_TX_BTSDIO_DATA
TP512 23
MCSI1_SYNC AUD_FSYNC HCI_CTS_BTSPI_CS
24
TP513
MCSI1_BCLK AUD_CLK HCI_RTS_STSDIO_IRQ
VBAT V_TCXO
U501 R1114D281D-TR-F
1 3
VDD VOUT
X500 TG-5010LH-87N
4 2 1 3
NC GND1 NC OUT
6 5
CE GND2 C505
2 4
1u GND VCC
C507
26MHz
1u
- 145 -
VBAT
48
GND16
47
GND15
2.2u C501
46
GND14
45
GND13
44
VBAT
43
PMEN WLAN_PWDN
42 TP500
GND12
41
GND11
40
OUT500
ANT
39
GND10
38
GND9
37
GND8
36
UART_TX WLAN_UART_TX
35
TP504
34
33
GND7
TP506
32
GND6
31
GND5
30
GND4
29
BT_NRST
28
BT_TX
27
BT_RX
26
BT_RTS
25
BT_CTS
V_TCXO
WLAN_UART_TX
R506
WLAN_SYSCLK WLAN_DEBUG_TX
0
WLAN_DEBUG_RX
C506
1u
OUT501
TP514
TP515
TP516
KE520
LGE Internal Use Only