LG CM1530 Service Manual page 28

WHEN POWER ON, RESET & DATA ETC WAVEFORM
5
6
7
Figure 1-2. LCD
CN101
1
2
3
4
5
6
7
8
9
10
15P
15P
RESET RESET
LED_CLK LED_CLK
LED_DATA LED_DATA
R121 1K
175_SELECT
6818_TX
R115 1K
CD_RX
R120
OPTION:NO DAB->Add DAB->NC
R107 1K
BT_RX
17
P2_3/A11/SEG3
18
P2_4/A12/SEG4
19
P2_5/A13/SEG5
20
P2_6/A14/SEG6
21
P2_7/A15/SEG7
22
ALE/GPIO19/SEG8
23
PSEN/GPIO18/SEG9
24
GPIO17/SEG10
25
P3_6/WR/SEG11
26
P3_7/RW/SEG12
CHANGE_SET 27
GPIO16/SEG13
28
HOST_EN
GPIO15/SEG14
29
GPOI14/SEG15
30
GPIO13/SEG16
C143 32KOUT
31
GPIO12/SEG17
32
GPIO11/SEG18
32.768KHz
C142
32KIN
175_SELECT
PC_SDA
PC_RESET
PLL_CS
IIC_SDA
IIC_SCL
R134 1K
LCD_STB
R124 1K
LCD_CLK
R126 1K
LCD_DATA
IP_RX
TUPOWER
CDPOWER
IP_TX IPPOWER
VOL-
DP_IPOD
VOL+
DM IPOD
74C175D
VCC-MCU
175_SELECT
1 16
SELECT VCC
0
2 15
1A /CS
104 1
3 14
1B 4A
4 13
1Y 4B
5 12
2A 4Y
R144 1K
6 11
2B 3A
R143 1K
7 10
2Y 3B
8 9
GND 3Y
R146
OPTION:NO DAB->Add DAB->NC
RH600
IR
RH600
VOL- 1
LED_PWR
RH600
3904
VOL+
RH600
KEY1
RH600
RH600
RH600
LCD_DATA
R141
RH600
LCD_STB
RH600
LCD_CLK
7 6
CA6818
64
VSS33_A
63
VDD33-A
62
VDD33-D
61
VDD18
60
GPIO1/PWM1
59
GPIO3/PWM0
58
REMOTE
57
XTAL_OUT-32K
56
XTAL_IN_32K
55
XTAL_OUT_20M
54
GPIO4/XTAL_IN_20M
53
RESET
52
GPIO5/UART1_RX
51
GPIO6/UART1_TX
50
P3_0/UART0_RX
49
P3_1/UART0_TX
IPOD_DET1
VCC-MCU
R133
R130
3-11
CHANNEL
A
B
CD_TX 4
BT_TX
6818_RX
VDD3V3A
1K
KEY1
AUDIO_DET
1K
LED_PWR
MAINPOWER1
VDD3V3A
VDD3_3D
VDD18
AMP-STBY
5
PORT-DET
5
IR
32KOUT
32KIN
R155 1K
AMUTE
5
RESET
5
R157 1K