NEC MultiSync LCD1550V Service Manual page 97

MODEL LCD1550V-1 / LCD1550V-1-BK (LA-15R02-1 / LA-15R02-1-BK) FIRMWARE CTRL/B SCHEMATIC DIAGRAM (3/5)
R33 10K
1
5VCC
U5
C57 3
22K
VCC
2 RST 2
Reset
0.1uF 1
GND
22K
LM810M3X-4.38
3
VCC
LM810M3X-4.38
DIO/MA730
1 2
GND RESET
L9 BLM21P300S
1 2
C65 C66
0.01uF 0.1uF
J2
1
2
3
4
BRIGHT
5
BLON 2 1
PENBKL
6
7
R42 1K
E&T_96113-0703
C68
BLON high enable(3.3V) 0.1uF
5VCC
R51 R52
4.7K 180
LED-Y
Q3
R57 100
LEDY 2 1 1
LEDY
2N7002
3
DRAIN
2N7002
SOT-23B
1 2
GATE SOURCE
2
RST#
Q1
DTC124EK
3
COLLECTOR
DTC124EK
SOT-23B
2 1
BASE EMITTER
5VCC
R40
10K
R41 20K
2 1
Q2
R43 10K
22K
C69 2 2 1
+
22K
22uF/50V DTC124EK
5VCC
R50
R53
180
4.7K
Q4
R54 100
LEDG
2 1 2
LEDG
2SA1036K
3
COLLECTOR
2SA1036K
SOT-23B
2 1
BASE EMITTER
5VCC
MCAD[16..17]
MCAD[16..17]
U6
MCAD16
3
D0
MCAD17
4
D1
7
D2
8
D3
13
D4
14
D5
17
D6
18
D7
MCALE 11
MCALE
G
74HCT373
5VCC
U7
MCAD0
3
D0
MCAD1
4
D1
MCAD2
7
D2
MCAD3
8
D3
MCAD4
13
D4
MCAD5
14
D5
MCAD6
17
D6
MCAD7
18
D7
MCALE
11
G
74HCT373
MCAD[0..7]
MCAD[0..7] 5VCC
U8
MCAD0
13
D0
MCAD1
14
D1
MCAD2
15
D2
MCAD3
17
D3
MCAD4
18
D4
MCAD5
19
D5
MCAD6
20
PWM0
D6
MCAD7
21
D7
MX26C1000BQC
LED-G
5VCC
R58 R59
10K 10K
EP_SDA
EP_SDA
EP_SCL
EP_SCL
10-3
C56 0.1uF
2 1
MCA16
2
Q0
MCA17
5
Q1
6
Q2
9
Q3
12
Q4
KEY1-1
15
Q5 KEY1-1
KEY1-2
16
KEY1-2
Q6
KEY2-1
19
KEY2-1
Q7
KEY2-2
KEY2-2
1 KEY2-3
KEY2-3
OC
KEY2-4
KEY2-4
C64 0.1uF
2 1
MCA[0..7]
MCA0
2
Q0
MCA1
5
Q1
MCA2
6
Q2
MCA3
9
Q3
MCA4
12
Q4
MCA5
15 KEY2-1
Q5
MCA6
16
Q6
MCA7 GPIO20
19
Q7
1 KEY1-1
OC
RESET
GPIO18
C105 100uF/16V KEY1-2
1 2 Powe SW
GPIO17
C67 0.1uF
2 1
MCA0 Add C105 100uF/16V => to solve AC power
12
A0
MCA1
11
on/off/on shut down issue.
A1
MCA2
10
A2
MCA3
9
A3
MCA4
8
A4
MCA5
7
A5
MCA6
6
A6
MCA7 MCA[8..15] 5VCC
5
MCA[8..15]
A7
MCA8
27
A8
MCA9
26
A9
MCA10
23
A10
MCA11
25
A11
MCA12 R44 R45 R46 R47 R48
4
A12
MCA13
28
A13
MCA14 10K 10K 10K 10K 10K
29
A14
MCA15
3
A15
MCA16
2
A16
JMCA17
30
A17
CS0#
22
CE
MCRD#
24
OE
JMCWR#
31
PGM
1
VPP
1 2
R49 0#
DEBUG PORT
J3
C70
C71 0.1uF
0.1uF#
2 1
HEADER 4#
U9
8 7
VCC TEST
5 3
SDA A2
6 2
SCL A1
4 1
GND A0
AT24LC16
5VCC
R34 R35 R36 R37 R38 R39
10K 10K 10K 10K 10K 10K
J1
LED-Y
1
LED-G
2
3
4
5
6
7
8
9
10
C58 C59 C60 C61 C62 C63 E&T_96113-1013
0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF
KEY2-2 KEY2-3 KEY2-4
GPIO21 GPIO22 GPIO23
MINUS Right SW Left SW
NEXT EXIT PLUS
MCA16
MCA17
CS0#
MCRD#
MCWR#
5VCC
R55 R56
10K# 10K#
1
RXD
2 RXD
TXD
TXD
3
4