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7. Schematic diagram and Wiring diagram
7.1. Schematic diagram
Indoor unit of MSE-21/24/28C/HR ACP-24CH70AEB
+5V
C3 104
IC224C04
R3
R4
8
1
10K
10K
VCC
A0
7
2
WC
A1
6
3
SCL
SCL
A2
5
4
SDA
SDA
GND
+5V
TRANS_OUT
R7 12K
1
C1
3
RST
104
2
+5V
C2
R5
IC1KIA7042
104
10K
R6
10K
SW1
CN7
+5V
2
D13
1
IN4148
T1_room
R112K
T1_room
D14
E4
C9
R17
IN4148
8.1K/1%
10uF/16V
104
CN8
+5V
2
D15
1
IN4148
T2_I.pipe
R12 2K
T2_I.pipe
D16
E5
C11
R18
IN4148
10uF/16V
104
8.1K/1%
CN12
S
1
N
E6
100uF/35V
D17
L1
1N4007
+5
Q8
DTA143
SEG1
Q9
DTA143
SEG2
E8
IC8
100UF/16V
C20
7
13
GND
Q7
+5
104
14
12
Vcc
Q6
11
Q5
R59
9
10
MR
Q4
10K
8
6
SEG4
CP
Q3
C16
R60
5
101
Q2
10K
2
4
SEG5
Dsb
Q1
C17
1
3
101
Dsa
Q0
74HC164
11
Service manual
D1
IN4007*8
IC3 7805
1
3
Vin
Vout
D2
5VAC2
E2
C6
E3
CN1
D3
104
5VAC1
4
D7
3
D4
1000uF/25V
470uF/16V
12VAC2
2
+12V
D5
1
E1
C5
D6
104
12VAC1
+5V
D8
R2
2200uF/25V
10K
EEPROM
SW_TEST
J2
C7
104
+5V
C10
R19
IC4
104
1M
1
42
X1
VSS
X1
2
41
X2
VDD
X2
In_FanM
3
40
Reset
In_FanM
P25
RESET
In_FanH
4
39
In_FanH
P26
XT1
STEP_I1
5
38
STEP_I1
P00
XT2
STEP_I2
6
37
STEP_I2
P01
Vpp/IC
STEP_I3
7
36
STEP_I3
P02
P24
STEP_I4
8
35
STEP_I4
P03
P23
HEAT
9
34
RXD20
HEAT
P04
P22
10
33
TXD20
VSS1
P21
SEG5
11
32
SEG5
P05
VDD1
SEG1
12
31
SEG1
P50
P20
SEG2
13
30
BUZ
SEG2
P51
P33
SEG3
14
29
In_FanL
SEG3
P52
P32
+5V
SEG4
15
28
In_FanLL
SEG4
P53
P31
In_FanLL
16
27
REC
AVDD
P30
17
26
SDA
AVREF
P11
T1
18
25
SCL
T1_room
ANI0
P10
T2
19
24
T2_I.pipe
ANI1
AVSS
SW
20
23
SW_TEST
ANI2
ANI5
Model
21
22
Model
ANI3
ANI4
IC_UPD789166(42PIN)
+5V
IC5
C13
R24
R22
3.5K/3W
104
C19
5.1k
PC817
+5
101
D18
1N4007
C17
R25
ZD1
330
471/250v
IC6
R23
C15
100K
IN4749
473
PC851
R20
R21
11K/2W
11K/2W
DIS1
WT4021BG
+5
Q10
SEG3
DTA143
E7
47UF/16V
+5
150
R19
R45330
REC1
R46 330
LED6
R47 330
AUTO
LED7
R48 330
DEF.
R49 330
LED8
TIMER
R54 330
LED9
RUN
R55 330
显示板原理图
+5V
C8
104
FUSE1
L1
CN2
L
3.15A/250V
2
C16
ZR1
14D681K
0.1uF/275VAC
1
t
POWER
N
PTC1
+5V
82RM
R1
10K
J1
J2
Model
无
冷暖
无掉电记忆
J1
有
单冷
有掉电记忆
X1
CN9
SEG4
1
SEG3
2
SEG2
3
RST
SEG1
4
SEG5
5
R81K
REC1
REC
6
C14
7
C18
8
+5V
102
RxD20
104
+5V
TxD20
BUZ
In_FanL
REC
SDA
IC7
SCL
1
16
STEP_I1
IN1
OUT1
2
15
STEP_I2
IN2
OUT2
EEPROM
3
14
STEP_I3
IN3
OUT3
4
13
STEP_I4
IN4
OUT4
5
12
In_FanH
IN5
OUT5
In_FanH'
R15 2k
RxD20
6
11
In_FanM
IN6
OUT6
In_FanM'
C20
7
10
In_FanL
IN7
OUT7
In_FanL'
4.7K
101
R27
8
9
VSS
VDD
C12
UJN2003
104
Q4
+12V
NPN
R14
TxD20
2k
C11
104
REC1
1
2
3
CN5
1
2
TRANS_IN
+12V
D9
In_FanLL'
+12V
IN4148
Q1
R13
9014
In_FanLL
2K
In_FanLL'
In_FanL'
+12V
D11
HEAT'
IN4148
Q3
R14
In_FanM'
9014
HEAT
2K
1
In_FanH'
2
CN11
+12V
3
R9
4
1K
5
BUZ1
+12V
SWING
Q5
R16
9014
BUZ
2K
HEAT'
CN6
1
2
RY1
LL
3
L1
4
N
5
CON5
RY3
L
L1
RY4
M
L1
RY5
FAN_IN H
L1
CN10
LOAD_HEAT N
1
HEAT_N
RY6
HEAT N
N
CN13
LOAD_HEAT L
1
HEAT_L
RY7
HEAT L
L
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