Norcent LT2790BK, Руководство по обслуживанию

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27’’ LCD TV Norcent LT2790BK
45
VOL-
C917
0.1uF
FB910
NC/ 600 OHM
1
2
ISP
FB912
220 OHM
PWR_SW
KEY-IR
DPMS_VS
+3V3SB
KEY6
LED-B
DPMS_HS
R960 330 1/16W
R4A5 0 1/16W
R4F1
10K
1/16W
增加 I-rush RC 保护回路 HR ： 4/27
KEY6
NEC-IR
CH+ 4
PDC_SDA
R4A3
1K 1/16W
C4H8
0.1uF
LED-1
R917 100
RGB_HSYNC 11,12
LED-1
R956
0 1/16W
IRR
VOL+
U910
AP1117-33
3 2
1
VI VO
GND
C912
18PF
Reset
Circuit
5V
KEY6
C913
18PF
KEY-IR
C942
0.1uF
FB917 300 OHM
VCC3_3
LED-1
RGB_VSYNC
R4F4
10K
1/16W
+5VSB
R908
3.3K 1/16W
MENU
ISP
RXD_B
R4J7 NC/0 1/16W
IRR
PDC_SCL
FB401 600 OHM
1 2
PWR-ON
KEY-IR
CH-
X2_P
R922
330 1/16W
C4J1
0.1uF
R4F5
10K
1/16W
MENU 4
C900
0.22uF
R916 100
SEL
PANEL-ON
X901
12MHz
1
2
X2_P
KEY2
Q908
AO4403
1
2
3
4
8
7
6
5
S1
S1
S1
G1
D1
D1
D1
D1
KEY3
12V_PANEL
SEL 3
R953 10K
U417
74HC4066D
1
2
3
4
5
6
7 8
9
10
11
12
13
14
1Y
1Z
2Z
2Y
2E
3E
GND 3Y
3Z
4Z
4Y
4E
1E
VCC
R4F6
10K
1/16W
RC5-IR
PWR_SW
PANEL-ON
X1_P
R925
3.3K 1/16W
U407 EM6353BX2SP3B-2.9+
1
2 3
GND
RST VCC
R4E9
10K
1/16W
KEY3
+5VSB
D5V
KEY2
Q903
2SC2412K
VCC3_3
RELAY-SW 18
TXD_B
R909
3.3K 1/16W
KEY3
R4K0
0
CN419
33G3278 13
1
2
3
4
5
6
7
8
9
10
11
12
13
JTAG_RSTN
R952
0 1/16W
C494
0.01uF
Q906
2SC2412K
CH+
U905
P87LPC764BD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
P0.0
P1.7
P1.6
RST/P1.5
VSS
X1/P2.1
X2/P2.0
INT1/P1.4
SDA/P1.3
SCL/P1.2
P1.1
P1.0/TXD
P0.7
P0.6
VDD
P0.5
P0.4
P0.3
P0.2
P0.1
R955
47K
R920 0 1/16W
MISC & Connectors
RESET
C4J2
0.1uF
RGB_VSYNC 11,12
RXD_B
R949
NC/ 10K
R919 NC/ 0
CH-
KEY2
R900
22K 1/10W
R4F0
10K
1/16W
CN902
NC/ 33G8009 5
1
2
3
4
5
FB913
220 OHM
R959
NC
+3V3SB
5V
LED-A
C4H3
0.1uF
TXD_B
+3.3V
+5VSB
I2C1CLK 6,9
KEY6
PANEL-ON
KEY3
R950
47K
R921 330 1/16W
+3V3SB
PANEL-ON1 3
RELAY-SW
LED-B
C4H4
0.1uF
SEL
C4H9
0.1uF
VOL+ 4
R4F3
10K
1/16W
RGB_HSYNC
LED-2
C918
0.1uF
PWR-ON
RESET
R918 330 1/16W
I2C1DATA 6,9
KEY3 KEY6
Q907
2SC2412K
Reset
Switch
Front Panel Control Connector
TV_VIDEO 4
LED-2
C961
0.22uF
C4J0
0.1uF
Q901
2SC2412K
+3V3SB
VOL- 4
R924
3.3K 1/16W
KEY6
RXD_B
RESET
PDC_SDA
TV_VIDEO
RC5-IR
PWR-ON
RESETN
PDC_SCL
SW401 SW_DIP_4P
1 2
3 4
C4H6
0.1uF
C957
0.1uF
D12V
RGB_VSYNC
PWR_SW 3
KEY-IR
FB911
220 OHM
U905-1
NC/ P89LPC930FDH
1
2
3
4
5
6
7
8
9
10
11
12
13
14 15
16
17
18
19
20
21
22
23
24
25
26
27
28
P2.0
P2.1
KBIO/CMP2/P0.0
P1.7
P1.6
RST/P1.5
VSS
XTAL1/P3.1
CLKOUT/XTAL2/P3.0
INT1/P1.4
SDA/INT0/P1.3
SCL/T0/P1.2
MOSI/P2.2
MISO/P2.3 P2.4/SS
P2.5/SPICLK
P1.1/RXD
P1.0/TXD
P0.7/T1/KBI7
P0.6/CMP1/KBI6
VDD
P0.5/CMPREF/KBI5
P0.4/CIN1A/KBI4
P0.3/CIN1B/KBI3
P0.2/CIN2A/KBI2
P0.1/CIN2B/KBI1
P2.6
P2.7
R958 NC
+5VSB
DPMS_VS
PWR-ON
DPMS_HS
X1_P
D5V
CH+
LED-A
R4F2
10K
1/16W
C4H5
0.1uF
+5VSB
CH- 4
FB914
300 OHM
1
2
R957
0 1/16W
R939
10K 1/16W
5V
RESETN 4,6,8
D
Page 15- Standby MCU and Reset
B
15 19 Wednesday, May 17, 2006
715T1961-
Title
Size Document Number Rev
Date: Sheet of
PANEL-ON1
Q905
2SC2412K
ISP
NEC-IR
C4H7
0.1uF
TXD_B
PWR_SW
+5VSB
+5VSB
LED-2
KEY2
IRR 6
JTAG_RSTN 6
+ C941
10uF/16V