Samsung SGH-B500 Service Manual page 42

Flow Chart of Troubleshooting
FM_INT
JACK_IN
R226
BATT_OPEN_CHECK
FLIP_SNS
SIM1_RST
A(0:18)
A(0)
A(1)
A(2)
A(3)
A(4)
A(5)
A(6)
A(7)
A(8)
A(9)
VCCD_1.8V
A(10)
A(11)
A(12)
A(13)
A(14)
A(15)
A(16)
R205 R206 R207 R208 R209 A(17)
A(18)
A(19)
A(20)
A(21)
A(22)
A(24)
D(0:15)
D(0)
D(1)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
D(8)
D(9)
D(10)
D(11)
D(12)
D(13)
D(14)
D(15)
ROM1_CS
RAM1_CS
LCD_CS
LOWER_BYTE
UPPER_BYTE
BAND_SEL
VMOD_EN
TX_EN
KEY_COL(0:4)
PSW1_BUF
KEY_COL(0)
KEY_COL(1)
KEY_COL(2)
KEY_COL(3)
KEY_COL(4)
KEY_ROW(0:4)
KEY_ROW(0)
KEY_ROW(1)
KEY_ROW(2)
KEY_ROW(3)
KEY_ROW(4)
VCCD_1.8V
VCCD_1.2AV
R200
C205 C206
C207 C208
T6
IRQ0
P9
IRQ1
R7
IRQ2
U9
IRQ3
N8
CGPIOB3_IRQ4
R8
CGPIOB4_IRQ5
M8
CGPIOB5_IRQ6
R1
CGPIOB6_IRQ7_USIMRST
L3
A00
K5
A01
E7
A02
C6
A03
C5
A04
B5
A05
L4
A06
D3
A07
E2
A08
A1
A09
B3
A10
A2
A11
D5
A12
B1
A13
G2
A14
D2
A15
C2
A16
C7
A17
C4
A18
A5
BOOT4_A19
C1
BOOT3_A20
D6
BOOT0_A21
B4
BOOT1_A22
F8
BOOT2_A23
D7
CGPIOB0_A24
F1
D00
M4
D01
N4
D02
M1
D03
J4
D04
E4
D05
H4
D06
E3
D07
K4
D08
J1
D09
M3
D10
K3
D11
F4
D12
F2
D13
H5
D14
G3
D15
F3
CS0N
D4
CS1N
L6
CS2N
N1
CS3N
D8
CS4N
G5
BE0N
N3
BE1N
N16
OCTL0
N13
OCTL1
M14
OCTL2
K14
OCTL3
M17
OCTL4
M15
OCTL5
N15
OCTL6
E8
KEY00_PWRSWBUF
B12
KEY01_PIPESTAT0
C12
KEY02_PIPESTAT1
A12
KEY03_PIPESTAT2
E11
KEY04_TRACEPKT0
D10
KEY05_TRACEPKT1
B11
KEY06_TRACEPKT2
C11
KEY07_TRACEPKT3
C10
KEY08_TRACEPKT4
A9
KEY09_TRACEPKT5
E10
KEY10_TRACEPKT6
D9
KEY11_TRACEPKT7
D11
KEY12_TRACESYNC
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C200 C201 C202
VCCD_2.9V VRF_2.9V
C209 C210
C211
CGPIOA2_ACC0CTS
CGPIOA3_ACC0RTS
CGPIOA4_ACC0DSR
CGPIOA5_ACC0DTR
CGPIOA6_ACC0RI
CGPIOA7_ACC0DCD
AGPIOA0_CPWM0_APWM0
AGPIOA1_CPWM1_APWM1
AGIPOA2_CLKOUT1
AGPIOA3_IRDATX
AGPIOA4_IRDARX
AGPIOB0_SMWAITN
ACC0RX_IRDARX
ACC0TX_IRDATX
USBDP_ACC0RX
USBDM_ACC0TX
UCP200 USBEXTINT
CTRLCLKRF
CTRLDATARF
SMADDRVALID
CLKOUT_TRACECLK
FLASHRSTN
10-7
VCCD_1.8V
C212
U13
CGPIOA0 CHG_OFF
R13
CGPIOA1 CHG_DET
N14
DEBUG_CTS
T17
DEBUG_RTS
P15
DEBUG_DSR
P16
DEBUG_DTR
R14
DEBUG_RI
T16
DEBUG_DCD
A6
CGPIOB1
F9
CGPIOB2
R2
VIB_RING_EN
P4
BL_EN
A13
B16
C14
A17
AGPIOA5 I2C_DAT
D13
AGPIOA6 I2C_CLK
U1
AGPIOA7 FM_BUS_EN
E5
SM_RDY_WAIT
U6
AGPIOB4 EAR_SW
P2
AGPIOB5 DLC_DETECT
P3
AGPIOB6 FM_SCL
H15
AGPIOB7 FM_SDA
T15
DEBUG_RXD
R16
DEBUG_TXD
T14
ACC1RX SDS_RXD
U15
ACC1TX SDS_TXD
M9
SSP2RXD SDO_PSC
R10
SSP2TXD SDI_PSC
N7
SSP2CLK SCLK_PSC
P8
SSP2FS CSN_PSC
E14
USBRCV
A15
A16
B13
USBOE
C13
T11
ABBCLK 26MHZ_ABB
J17
ABBDCLK
L16
ABBDINT DINT
H13
ABBDEN ABB_EN
K13
ABBDDATA ABB_DAT
N11
ABBAINT AINT
H14
CTRLENRF SBLE
G15
SBCK
G14
SBDT
T13
TEST0
M10
TEST1 R211
U17
TEST2
T2
USIMCLK SIM1_CLK
T1
USIMIO SIM1_DAT
A3
SMCLK SM_CLK
B2
SM_ADDR_VALID
C16
I2CSDA
B15
I2CSCL
P12
CLKREQ CLK_REQ
P14
CLK32KHZ RTC_CLK
C8
L15
RXTXEN RTX_EN
K15
RXTXDAT RTX_DAT
J14
TXPSTB TXPSTB
K12
SCUSTB SCUSTB
E1
WEN CP_WEN
H3
OEN CP_OEN
G16
RTCK RTCK
U12
TCK TCK
P11
TDI TDI
T12
TDO TDO
P13
TRSTN TRSTN
N10
TMS TMS
C217
E17
SYSCLK
N2
FLASH_RST
U16
RESETN RST
R12
PWRKEEP PWR_KEEP
26MHZ_DBB