Samsung SGH-I750 Service Manual page 65

PWR_EN
VWLAN30 VWLAN30
50 50
BTCX_BT BTCX_BT
51 51
BTCX_PRI BTCX_PRI
BTCX_PRI BTCX_PRI
R825 R825 52 52
BTCX_RXIND BTCX_RXIND
BTCX_RXIND BTCX_RXIND
49 49
BTCX_WL BTCX_WL
BTCX_WL BTCX_WL
44 44
LOADSCR0 LOADSCR0
43 43
LOADSCR1 LOADSCR1
40 40
SD_CLK SD_CLK
R833 R833
R834 R834
41 41
SD_CMD SD_CMD
39 39
SD_DAT0 SD_DAT0
R820 R820
38 38
SD_DAT1 SD_DAT1
37 37
SD_DAT2 SD_DAT2
42 42
SD_DAT3 SD_DAT3
1 1
DCDC_POR_N DCDC_POR_N
R807 R807
29 29
DEBUG_EN DEBUG_EN
8 8
LOCK LOCK
2 2
RST_N RST_N
R808 R808
C805 C805
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VBAT
VWLAN_EN
16 15 14 13 12 11 10
9
TRIM
1
EN2
8
U616
VDD
2
EN1
7
VOUT4
3
VDD
17
NC
18
NC
C651
4 5 6
VWLAN30
C658 C659
C812 C812
RFS802 RFS802
MS-156(02) MS-156(02)
1 1
IN IN
G1 G1
3 3
L805 L805
L804 L804
R818 R818
34 34
SPI_CLK SPI_CLK
SPI_CLK SPI_CLK
32 32
WLAN_INT WLAN_INT
SPI_EXT_INT SPI_EXT_INT
33 33
SPI_MISO SPI_MISO
SPI_MISO SPI_MISO
35 35
SPI_MOSI SPI_MOSI
SPI_MOSI SPI_MOSI
36 36
SPI_nCS SPI_nCS
SPI_SS_N SPI_SS_N
30 30
UART_RX UART_RX
31 31
UART_TX UART_TX
MOD800 MOD800
17 17
PA_VDD PA_VDD
5 5
PLL_VDD PLL_VDD
7 7
VCO_VDD VCO_VDD
4 4
VDD18 VDD18
3 3
VDD33 VDD33
27 27
VDD_A VDD_A
9 9
VDD_D VDD_D
7-31
Flow Chart of Troubleshooting
C646
VBAT
VWLAN18
C648
VTV29
VTV25
C660
ANT800 ANT800
2 2 1 1
OUT 2 OUT 2
G2 G2
4 4
VWLAN30 VWLAN30
C806 C806
C809 C809
VWLAN30 VWLAN30 VWLAN30 VWLAN30
C817 C817 C816 C816
C807 C807 C808 C808
VWLAN30 VWLAN30 VWLAN30 VWLAN30 VWLAN18 VWLAN18
C820 C820
C815 C815 C814 C814