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Chocolate KU800
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LG KU800 Service Manual page 152
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Contents
Table of Contents
Troubleshooting
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Table of Contents
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7. CIRCUIT DIAGRAM
1
2
A
SDRAM_DATA(0:31)
SDRAM_DATA(0)
U4
DQ0
SDRAM_DATA(1)
T4
DQ1
SDRAM_DATA(2)
T5
DQ2
SDRAM_DATA(3)
V5
DQ3
SDRAM_DATA(4)
U5
DQ4
T6
SDRAM_DATA(5)
DQ5
SDRAM_DATA(6)
V6
DQ6
SDRAM_DATA(7)
U7
DQ7
SDRAM_DATA(8)
T9
DQ8
SDRAM_DATA(9)
T10
DQ9
SDRAM_DATA(10)
V10
DQ10
SDRAM_DATA(11)
T11
DQ11
SDRAM_DATA(12)
U11
DQ12
SDRAM_DATA(13)
V11
DQ13
B
SDRAM_DATA(14)
T12
DQ14
SDRAM_DATA(15)
U12
DQ15
P3
SDRAM_DATA(16)
DQ16
SDRAM_DATA(17)
R3
DQ17
SDRAM_DATA(18)
P4
DQ18
R4
SDRAM_DATA(19)
DQ19
SDRAM_DATA(20)
P5
DQ20
SDRAM_DATA(21)
R5
DQ21
SDRAM_DATA(22)
P6
DQ22
SDRAM_DATA(23)
R6
DQ23
SDRAM_DATA(24)
P9
DQ24
SDRAM_DATA(25)
P10
DQ25
SDRAM_DATA(26)
R10
DQ26
SDRAM_DATA(27)
P11
DQ27
SDRAM_DATA(28)
R11
DQ28
SDRAM_DATA(29)
P12
DQ29
R12
SDRAM_DATA(30)
DQ30
SDRAM_DATA(31)
R13
DQ31
U8
SDRAM_DQM(0)
DQM0
T8
SDRAM_DQM(1)
DQM1
V7
SDRAM_DQM(2)
DQM2
U9
SDRAM_DQM(3)
DQM3
C
EBI2_DATA(0:7)
EBI2_DATA(0)
M11
IO1
EBI2_DATA(1)
M13
IO2
EBI2_DATA(2)
L10
IO3
L12
EBI2_DATA(3)
IO4
EBI2_DATA(4)
J9
IO5
EBI2_DATA(5)
H12
IO6
H10
EBI2_DATA(6)
IO7
EBI2_DATA(7)
G12
IO8
A1
NC1
A2
NC2
A3
NC3
A4
NC4
A11
NC5
A12
NC6
A13
NC7
A14
NC8
B1
NC9
B2
NC10
B3
NC11
B4
NC12
B11
NC13
B12
NC14
D
B13
NC15
B14
NC16
C1
NC17
C2
NC18
C5
NC19
C13
NC20
C14
NC21
D1
NC22
D14
NC23
E1
NC24
E7
NC25
E8
NC26
E9
NC27
E10
NC28
E11
NC29
E
1
2
LGIC(42)-A-5505-10:01
3
4
5
MEMORY
C3
A0
D3
A1
E3
A2
E2
A3
D12
A4
C12
A5
D11
A6
C11
A7
D10
A8
C10
A9
E4
A10
D9
A11
C9
A12
R301
L6
_WP
K6
_WEN
D5
_RAS
D6
_WED
E6
_CAS
C8
CLK
E5
_CS
M3
ALE
M4
CLE
M9
_CE
M10
_RE
M2
RY__BY
D8
CKE
C4
BA0
D4
BA1
C7
VCCD1
D2
VCCD2
D13
VCCD3
V3
VCCD4
V8
U302
VCCD5
V12
VCCD6
TY9000A800EOGG
V4
VCCQD1
V9
VCCQD2
K12
VCCN2
C6
VSS1
F7
VSS2
G2
VSS3
G13
VSS4
L13
VSS5
P2
VSS6
P13
VSS7
R8
VSS8
U2
VSS9
U6
VSS10
U10
VSS11
U13
VSS12
D7
NC132
J12
NC131
K4
NC71
K5
NC72
K9
NC73
K10
NC74
K11
NC75
K13
NC76
K14
NC77
L1
NC78
L2
NC79
L3
NC80
L4
NC81
L5
NC82
L9
NC83
L11
NC84
L14
NC85
M5
NC86
M6
NC87
M12
NC88
N2
NC89
3
4
5
- 153 -
6
7
8
BUFF_TCXO
EBI2_WE_N
SDRAM_ADDR(0:12)
EBI2_DATA(0)
SDRAM_ADDR(0)
EBI2_DATA(1)
SDRAM_ADDR(1)
EBI2_DATA(2)
SDRAM_ADDR(2)
EBI2_DATA(3)
SDRAM_ADDR(3)
EBI2_DATA(4)
SDRAM_ADDR(4)
EBI2_DATA(5)
SDRAM_ADDR(5)
EBI2_DATA(6)
SDRAM_ADDR(6)
EBI2_DATA(7)
SDRAM_ADDR(7)
EBI2_DATA(8)
SDRAM_ADDR(8)
EBI2_DATA(9)
SDRAM_ADDR(9)
EBI2_DATA(10)
SDRAM_ADDR(10)
EBI2_DATA(11)
SDRAM_ADDR(11)
EBI2_DATA(12)
SDRAM_ADDR(12)
EBI2_DATA(13)
100K
EBI2_DATA(14)
RESOUT_N
EBI2_DATA(15)
EBI2_WE_N
LCD_IF_MODE0
SDRAM_RAS_N
LCD_IF_MODE1
SDRAM_WE_N
VREG_MSMP_2.7V
SDRAM_CAS_N
SDRAM_CLK
LCD_ADS
SDRAM_CS_N(0)
LCD_CS_N
NAND_ALE
NAND_CLE
NAND_CS_N
EBI2_OE_N
NAND_READY
MPL_LCD_EN
SDRAM_CLK_EN
R304
SDRAM_ADDR(13)
VREG_MSMP_2.7V
SDRAM_ADDR(14)
100K
VREG_MSME_1.8V
VREG_MSMP_2.7V
C312
0.1u
SLIDE_SENSE
R305
VREG_MSMP_2.7V
62
U301
A3212EELLT-T
VDD
G1
OUT
G2
SLIDE_DETECT
C313
UART_TX
0.1u
UART_RX
PM_ON_SW_N
Section
Date
12/10
Designer
2005
Checked
Approved
LG Electronics Inc.
9
10
LCD_ Serializer
U300
FIN224AC
A6
D3
CKREF
VDDP
VREG_MSMP_2.7V
B5
STROBE
E4
VDDS
A5
DP1
B4
F4
DP2
VDDA
C300
C301
C302
A4
DP3
10n 0.1u
0.1u
C4
DP4
A3
D4
DP5
GND1
B3
E3
DP6
GND2
A2
DP7
C3
DP8
A1
DP9
B2
DP10
B1
DP11
C2
DP12
D1
C5
DP13
CKSO+
CKSO+
D2
DP14
E1
C6
DP15
CKSO-
CKSO-
E2
DP16
F1
DP17
F2
D6
DP18
DSO+_DSI-
DSO+
G1
DP19
G2
D5
DP20
DSO-_DSI+
DSO-
F3
DP21
G3
DP22
G4
E5
DP23
CKSI+
G5
DP24
E6
CKSI-
C1
CKP
G6
S1
F5
S2
F6
B6
DIRI
_DIRO
C303
0.1u
CTS
12
RTS
11
DSR
10
USB_D+
NC4
UTXD
9
USB_D-
NC3
URXD
8
USB_VBUS
PWR
NC2
7
VBATT
VBAT
VBAT
6
PM_ON_SW_N
ON_SW
ON_SW
5
UFLS
NC1
4
UART_TX
TX
TX
3
UART_RX_IN
RX
RX
2
GND
GND
1
2.5G
3G
UART
D
TP316
OJ300
OJ301
OJ302
OJ303
TP317
TP318
Sign & Name
Sheet/
Sheets
MODEL
KU800
B.H.KU
3/5
KU311
DRAWING
MEMORY
NAME
DRAWING
REV 1.1
NO.
LG Electronics Inc.
Table of
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Table of Contents
Troubleshooting
TROUBLE SHOOTING
74
Power ON Troubleshooting
95
Charger Troubleshooting
100
USB Troubleshooting
103
SIM Detect Troubleshooting
105
Key Sense Troubleshooting
106
Camera Troubleshooting (2M Camera)
107
Keypad Backlight Troubleshooting
109
Folder ON/OFF Troubleshooting
110
Main LCD Troubleshooting
111
Main LCD Troubleshooting
112
Audio Trouble Shooting
114
Audio Trouble Shooting
115
Troubleshooting Download Errors
138
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