Norcent LT3225 Service Manual page 48

32'' LCD TV
Reset
Circuit
VCC3_3 U407 EM6353BX2SP3B-2.9+
3 2
VCC RST
SW_DIP_4P SW401
1 2
Reset
3 4
Switch
JTAG_RSTN R4A5 0 1/16W
6 JTAG_RSTN
+5VSB
R908
3.3K 1/16W
R925
R924 3.3K 1/16W
PWR-ON Q906
2SC2412K
3.3K 1/16W
D5V D12V
FB914 FB910
300 OHM NC/ 600 OHM
Q908
1 8
S1 D1
2 7
S1 D1
3 6
S1 D1
4 5
G1 D1
C900
R950 0.22uF
47K AO4403
R900 增加I-rush RC保护回路
R949
Q901 22K 1/10W NC/ 10K
2SC2412K PANEL-ON
PANEL-ON1
PANEL-ON1
R953 10K
R955
47K
Front Panel Control Connector
VCC3_3
R4A3
1K 1/16W
CN419
RESETN 4,6,8
C494
0.01uF
33G3278 13
+5VSB
R909
3.3K 1/16W
RELAY-SW
RELAY-SW 18
Q907
2SC2412K
6,9 I2C1CLK
6,9 I2C1DATA
CN902
+3V3SB
1
2 ISP
3 TXD_B
4 RXD_B
5
12V_PANEL
NC/ 33G8009 5
FB911
220 OHM
FB912
220 OHM C957
FB913 0.1uF
220 OHM
HR：4/27
U910
+3V3SB +5VSB
AP1117-33
2 3
VO VI
3
+ C941
C961
10uF/16V
0.22uF
MISC & Connectors
+3.3V +5VSB
13 TV_VIDEO
12 MENU
11 VOL-
10 VOL+
9 KEY2
8 KEY3
7 KEY6
6 LED-A
5 LED-B
4 R4J7 NC/0 1/16W SEL
3 FB917 300 OHM KEY-IR
2
1
R4K0
11,12
0
11,12 RGB_HSYNC
U905
R916 100 PDC_SCL 10
SCL/P1.2 P0.0
R917 100 PDC_SDA 9
SDA/P1.3 P0.1
X1_P
C912
P0.2
18PF
P0.3
X901 6
X1/P2.1 P0.4
12MHz
P0.5
7
X2/P2.0 P0.6
X2_P
C913
P0.7
18PF
PWR-ON PWR-ON 2
P1.7 P1.0/TXD
PANEL-ON 3
P1.6 INT1/P1.4
RXD_B
11
P1.1 RST/P1.5
5
VSS VDD
P87LPC764BD
R939
10K 1/16W
+3V3SB
1
P2.0
2
P2.1
KEY3 3
KBIO/CMP2/P0.0
PWR-ON 4
P1.7
PANEL-ON 5
P1.6
ISP 6
RST/P1.5
7
VSS
X1_P
8
XTAL1/P3.1
X2_P 9
CLKOUT/XTAL2/P3.0
KEY-IR NEC-IR
R956 10
INT1/P1.4
0 1/16W PDC_SDA 11
SDA/INT0/P1.3
PDC_SCL
KEY2 12
SCL/T0/P1.2
R959 13
MOSI/P2.2
NC 14
MISO/P2.3
48
Norcent LT3225
D5V FB401 600 OHM 5V
2 1
+5VSB
U417
KEY2 1 14
1Y VCC
CH- 2 13
4 TV_VIDEO CH- 4
1Z 1E
CH+ 3 12
MENU 4 CH+ 4
2Z 4E
KEY3 4 11 KEY6 KEY6
VOL- 4
2Y 4Y
5 10 PWR_SW PWR_SW
VOL+ 4
2E 4Z
CH- 6 9
5V
3E 3Z
CH+ 7 8 KEY-IR
GND 3Y
PWR_SW
74HC4066D
SEL
SEL 3
+5VSB
RGB_VSYNC
RGB_VSYNC
RGB_HSYNC
1 KEY3 KEY3
20 DPMS_HS R952
19 RC5-IR 0 1/16W
18 DPMS_VS R920 0 1/16W RGB_VSYNC
17 KEY6 KEY6
16 LED-1 LED-1 R921 330 1/16W
LED-2
14 RESET RESET R919 NC/ 0
13
TXD_B
12 R922
8 NEC-IR LED-2 330 1/16W Q903
4 ISP 2SC2412K
15 R960 330 1/16W
+5VSB
R918 330 1/16W
C917 Q905
0.1uF 2SC2412K
LED-A
U905-1
28
P2.7
27 R957
P2.6
26 DPMS_HS 0 1/16W
P0.1/CIN2B/KBI1
25 RC5-IR R958
P0.2/CIN2A/KBI2
DPMS_VS
24
P0.3/CIN1B/KBI3
23 KEY6 +3V3SB
P0.4/CIN1A/KBI4
LED-1
22
P0.5/CMPREF/KBI5
21
VDD
20 LED-2
P0.6/CMP1/KBI6
RESET
19
P0.7/T1/KBI7
18 TXD_B C942
P1.0/TXD
RXD_B 0.1uF
17
P1.1/RXD
16
P2.5/SPICLK
15
P2.4/SS
NC/ P89LPC930FDH
Title
Page 15- Standby MCU and Reset
Size Document Number
B
715T1961-
Date: Wednesday, May 17, 2006 Sheet
C918
0.1uF
5V
PWR_SW 3
IRR IRR
IRR 6
RESETN
LED-B
KEY2
NC KEY-IR
Rev
D
15 of 19