4-5
SCHEMATIC DIAGRAM OF POWER 1 BOARD FOR WV-CW374E
6
TO
POWER
CABLE
(E11)
TO
POWER 2
BOARD
CN4
R19
12k
R11
6.2k
DGND
D1
D7
R22
3.3k
C9
100p
D12
C13
270/16
R12
470
C6
0.1
VS4
F1
3.15A
250V
D4
D5
IC1
1
Ref_pin
2
A
3
K
R20
3.3k
C2
1
CF1
1
4
3
2
R16
47
T1
2
3
4
5
7
8
9
10
VS3
R21
220
D11
C1
0.33
D8
F2
3.15A
250V
VS1
R15
22k
R8
12k
R23
2.2k
1
GND
2
LP/LPFO
3
LLDET/LPFI
4
5V
5
10.5V
6
24V
7
EXT BW/LED
8
GND[24V]
L1
33
33
D10
R17
2.2k
R7
12k
VS2
R18
47
C3
470/50
D6
R2
1.1k
R14
150
C12
560/10
R13
220
R5
47k
D2
Q1
G
S
D
R4
47
D13
C4
470p
C14
1
C11
0.01
C16
180/10
R3
680
R6
100
Q2
D3
C10
4700p
C15
120/16
AGND
AGND
L2
C5
470p
D9
R1
1.1k
1/4W
1/4W
1/4W
1/4W
R9
10k
C7
0.22
D14
CN1
1
24V AC (L)
2
24V AC (N)
3
4
5
C8
4700p
TH1
2k
Q3
1
2
4
3
Q4
1
2
3
4
E2
E1
24V AC (L)
24V AC (N)
(12V DC)
FOR CAMERA
FOR HEATER
(24V AC)
GND
+
–
Important safety notice
Components identified by " " mark have special characteristics for safety.
When replacing any of these components, use only manufacture's specified parts.
POWER 1 BOARD
1
A
B
C
2
3
4
5
<INDEX>
POWER 1 BOARD
IC1
A4
Q1
B2
Q2
A2
Q3
B3
Q4
A3
D1
C2
D2
C2
D3
B2,C2
D4
B2
D5
A2
D6
A2
D7
A3
D8
B3
D9
A3
D10
C3
D11
B3
D12
C5
D13
C5
D14
B5