LG KM380t Service Manual page 101

8. CIRCUIT DIAGRAM
1 2
MIC MIC
MICBIAS
A
C400
DNI
L401 100nH
C401
MIC_P
22n
L402 100nH
C402
MIC_N
22n
27p C404
27p C405
C403
100p
B
LCD_Connector
VIO_2V62
CN402
G1 G2
1 40
2 39
MLED_A
3 38
MLED_C1
4 37
MLED_C2
5 36
MLED_C3
6 35
MLED_C4
7 34
MLED_C5 MODE1
8 33
MODE2
9 32
C LCD_VSYNC INOUT_B4 INOUT_A4
6 4 10 31
DIF_CS INOUT_B3 INOUT_A3
11 30
7 3
DIF_RS INOUT_B2 INOUT_A2
8 2 12 29
DIF_WR INOUT_B1 INOUT_A1
9 1 13 28
DIF_RD
14 27
FL400
15 26
ICVE10184E150R101FR
16 25
17 24
MODE1 MODE2 18 23
19 22
20 21
8 BIT H L
G3 G4
C407
16 BIT L
L
AXT540124
1u
9 BIT H H
D
LCD BACKLIGHT LED DRIVER
C411 1u
VBAT U401 MAX8630W
3 7
IN OUT
C415
1 14
GND LED1
1u
13
LED2
12
LED3
11
LED4
9 10
CPWM LED5
E
8 15
LCD_BACKLIGHT_EN PWM P_GND
C416
0.1u
C417 1u
1 2
LGE Internal Use Only
3 4 5
VBAT
KEY LED
MIC400
1
OUT
2
G1
3
G2
4
G3
5
PWR
6
G4
C406
SPM0204LE5-QB
10u
R593
KEY_BL_EN
100K
VIO_2V62
SIDE_KEY_MODE/END
LCD_ID
FL401
ICVE10184E150R101FR
5
4
3
INOUT_B4 INOUT_A4 DIF_D(7)
2
6 4
INOUT_B3 INOUT_A3 DIF_D(6)
7 3 1
INOUT_B2 INOUT_A2 DIF_D(5)
8 2
INOUT_B1 INOUT_A1 DIF_D(4) CN401
9 1
1 9
INOUT_A1 INOUT_B1 DIF_D(3)
2 8
INOUT_A2 INOUT_B2 DIF_D(2)
3 7
DIF_D(1)
INOUT_A3 INOUT_B3
4 6
INOUT_A4 INOUT_B4 DIF_D(0)
ICVE10184E150R101FR
FL402
R430
LCD_RESET
100
SIDE_KEY_HOLD
C409
22p
R429 10K
L513
3
2 100nH
1
resistor
CN403
L512 D303 R592
100K
100nH
PRSB6.8C
HALL EFFECT S/W
VIO_2V62
MLED_A
MLED_C1
R437 100K
MLED_C2
C412
MLED_C3
0.1u BU52031NVX U400
MLED_C4
MLED_C5
4
VDD OUT
3
NC GND
C414
1u
3 4 5
6 7
KEY PAD
R400
KP_OUT(0)
150
R401
KP_OUT(1)
150
R402
KP_OUT(2)
150
R415
KP_OUT(3)
150
R416 150
KP_OUT(4)
R417 150
KP_IN(2)
R418 150
KP_IN(3)
R419 150
KP_IN(4)
R420 150
KP_IN(5)
R421 150
KP_IN(6)
R424 150
KP_OUT(1)
R426 150
KP_IN(6)
VBAT
END
Remote Power On
VIO_2V62
RPWRON_EN
HOLD
RPWRON
FLIP_OPEN
C413
0.1u
1
2
6 7
- 102 -
8 9 10
MULTI
AST(*)
1 6
SEND
OK
400 401
402 403
MULTI
2 SHP(#)
7 LEFT
405 406 MODE
407 408
MULTI
8 MENU(F1)
3
RIGHT END
409 410
411 KB400
MULTI
VOLUME
4 9 BACK(F2)
UP
UP
412 413 414 415
MULTI
VOLUME
CLR
DOWN
0
5 DOWN
418 419
416 417
SIDE_KEY_VOL
R425 150
KP_OUT(3) VOLUME UP
4 R427 150
KP_OUT(4) VOLUME DOWN
3 R428 150
KP_IN(6)
2
1
CN400
VRTC_2V0
R431
330K R435
END
10K
PWRON
R434
3.3M 1 2 3
C410
10u
Q400
EMX18
6 5 4
END_KEY_IN
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
404
A
C
END_KEY_IN
KP_IN(6)
D
KP_OUT(2)