Samsung SGH-M300 Service Manual page 22

AIT_INT
A(22)
A(23)
D(0:15)
D(0)
A6
XCP_D0
D(1) B5
XCP_D1
D(2)
F8
XCP_D2
D(3)
F7
XCP_D3
D(4) C5
XCP_D4
D(5)
D6
XCP_D5
D(6) E7 XCP_D6
D(7)
D5
XCP_D7
D(8)
C4
XCP_D8
D(9)
B4
XCP_D9
D(10)
B3
XCP_D10
D(11)
C1
XCP_D11
D(12) C2
XCP_D12
D(13)
D2
XCP_D13
D(14) D3
XCP_D14
D(15)
E3
A(0:20)
XCP_D15
A(0) B13
XCP_A0_BEON
A(1) F11
XCP_A1
A(2) E14
XCP_A2
A(3)
D15
XCP_A3
A(4)
B15
XCP_A4
A(5)
C14
XCP_A5
A(6)
A16
XCP_A6
A(7)
A15
XCP_A7
A(8)
B17
XCP_A8
A(9)
C17
XCP_A9
A(10) D16
XCP_A10
A(11)
F14
XCP_A11
A(12) G14
XCP_A12
A(13) G13
XCP_A13
A(14) G17
XCP_A14
A(15)
J12
XCP_A15
A(16) K12
XCP_A16
A(17)
K13
XCP_A17
R205
A(18) K14
XCP_A18
A(19)
L14
XCP_A19
A(20)
L15
XCP_A20
L16
A(21)
XCP_A21
A12
CP_CSROMEN
XCP_CSROMEN
A13
CP_CSRAMEN
XCP_CSRAMEN
M15 XPA0/CS1N
AIT_SUB_CS
M14
AIT_CS
XPA1/CS2N
M11
DLC_DETECT
XPA2/CS3N
N14
YMU_EN
XPA3/CS4N
C13
CP_WEN
XCP_WEN
P16
CP_OEN XPA4/OEN
P15
AIT_LCD_BY
XPA5/WAITN
T15
UPPER_BYTE XPA6/BE1N
M9
INTRQ
XPA7/IRQ1
T5
FM_INT
XPA8/IRQ2
P2
FLIP_SNS
XPA9/IRQ3
N2
XPA10/IRQ4
YMU_IRQ
C222
KEY_COL(0:4)
KEY_COL(0)
VCCD_2.9V
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)
R210 R211
KEY_ROW(3)
KEY_ROW(4)
I2C_CLK
I2C_DAT
DEBUG_DTR
DEBUG_RTS
DEBUG_TXD
DEBUG_RXD
DEBUG_CTS
CHG_DET
SDS_TXD
SDS_RXD
SIMDATA
SIMCLK
VCCD_1.8V VCCD_1.8V
CORE_TP
UCP201
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VCCD_2.9V VCCD_1.8V VCCD_2.9V
R204
C215 C214
C213
F12
TDO
F15
TRST
H12
TDI
G12
TMS
H13
TCK
G15
CKO/IACK/ERAMHI
L12
IOBIT[2]/VEC[3]/EROMHI
K11
IOBIT[1]/VEC[4]/PLLTOA
N4
INT#0
R12
IO7
U5
RWN
T17
AB#8
T14
AB#7
R14
AB#6
P12
AB#5
P11
AB#4
N11
AB#3
R13
AB#2
M10
AB#1
U13
AB#0
DSP_DB(15)
P10
DB#15
DSP_DB(14)
R11
DB#14
T11 DSP_DB(13)
DB#13
DSP_DB(12)
U11
DB#12
M8 DSP_DB(11)
DB#11
N8 DSP_DB(10)
DB#10
N7
DB#9
P7
DB#8
M6
DB#7
R7
DB#6
T7
DB#5
U7
DB#4
P6
DB#3
R6
DB#2
U6
DB#1
P5
DB#0
XTIC_MODE D12
R206
M12
XCPTSTSTOP_CKO
D11
XAG3
E11
XAG2
A11
XAG1
B11
XAG0
B7
XBSWN
A7
X1RTC
D10
X2RTC
E8
XRTCALARM_N
C6
XOSC32OUT
3-7
Flow Chart of Troubleshooting
VRTC_3V
C216
ZD201
VREF
CLK13M_TR
TR_RST
TR_RST
CHG_OFF
DSP_INT
DSP_INT
DSP_IO
DSP_RWN
DSP_AB(8:0)
DSP_AB(8)
DSP_AB(7)
DSP_AB(6)
DSP_AB(5)
DSP_AB(4)
DSP_AB(3)
DSP_AB(2)
DSP_AB(1)
DSP_AB(0)
DSP_DB(15:0)
DSP_DB(9)
DSP_DB(8)
DSP_DB(7)
DSP_DB(6)
DSP_DB(5)
DSP_DB(4)
VBAT
DSP_DB(3)
DSP_DB(2)
DSP_DB(1)
DSP_DB(0)
R207
ICHRG
1
VOUT
2
TR_RST NC
C221
R208
R209
RTCALARM
CLK32K
OSC200
C224
C223
CP_TDO
TR_RST
CP_TDI
CP_TMS
CP_TCK
DEBUG_DSR
EAR_SWITCH
AS1
JACK_IN
PWR_KEEP
SIMRST
FLASH_RESET
BL_EN
BP_VF
UP_CS
UP_SCLK
UP_SDO
UP_SDI
VCCB_2.9V
U202
4
VCC
3
GND