BBK LED1973W, Service Manual

Page: 34 / 35

1 3
CN
1
A
C
INPUT
1 4
2 3
LF
1
W
D
11725
1
2
F1
T
3
.15A
-L
250V
T
NT
C
1
5D
-9
CY
1
470
p
F
/400V
A
C-X
1Y
1
CY
2
470
p
F
/400V
A
C-X
1Y
1
HV
HV
C1 NC
GND
4
FB
6
HV
3
MO
S
5
12V
12
5V
7
NC
11
GND
10
NC
9
O O
O O
5V
8
T1
S
K
Y
-BCK
-T
G
W
3417
GND
1
CO
M
P
2
RF
3
CS
4
VDD
5
GA
T
E
6
U1
L
D
7535
C19 *100
p
F1
KV
1
R18
68K
/1
W
C18
4.
7nF
400V
D1
4
RL
207
GND
GND
C52
1000uF
25V
L5
1
2.
2uH
GND
C56
0.
1uF
50V
GND
A
1
K
2
C
4
E
3
U2
P
C817B
R33 10K
C31
1uF
16V
R34
4.
7K
-F
GND
GND
R
1
A
2
K
3
U3
T
L
431
R32 2K
2
R31 220R
G
D S
Q1
F
S
4N
60F
R26 10K
R24
470R
R53
10K
GND
GND
1 2
CX
1
0.
47uF
K
/275V
-X
2
C2
33uF
400V
C55
470uF
25V
C20
2.
2nF
400V
A
C
C16 0.
1uF
50V
R21 100K
GND
4
GND
1
GND
2
GND
3
HS1
K
Y
X
-T
X
T
-021A
R22 39R
C14
0.
1uF
50V
C15
100
p
F
50V
R0
0R
C13
*470
p
F
200V
C42
1000uF
16V
L4
1
2.
2uH
GND
C44
0.
1uF
50V
GND
C45
470uF
10V
D1
3
F
R107
R13 0R R12 470K
C12
10uF
50V
+5
V
+5
V
1
L N
R1
2M
R2
2M
1 4
2 3
LF
2
W
D
11726
D2 RL
207
D1
RL
207
D3
RL
207
D4
RL
207
R28
1R5
R29
1R
R30
1R
R15 22R
R51
100R
R37 4.
99K
-F
1 2 3 4 5 6
CN
2
P
H
-6A
-W
1 2 3
CN
3
P
H
-3A
-W
+
12V
+
12V
C41
1nF
50V
GND
+5
V
PC
O
N
nc
ZD
1
2
*27V
+5
V
1
+5
V
GND
GND
4
GND
1
GND
2
GND
3
HS2
K
Y
X
-T
X
T
-022A
GND
GND
C51
1nF
200V
R41
100R R42 100R
R23 100R
nc
D2
3
L
M
BD
914L
T
1
R11 470K
GND
GND
R52 100R
C54
0.
1uF
50V
GND
ZD
5
1
15V
R54
1R
R55
1R
GND
GND
GND
+5
V
GND
PC
O
N
R78 0R
GND
GND
EA
2
IN
N
4
GND
7
VDD
1
OVP
5
CM
P
3
NC
6
OUT
8
U6
1
BI
T
3251
R65 20K
+
12V
A
GND
GND
GND
GND
R75
470R-F
R79
20K
-F
V-
B
OOS
T
GND
C64
0.
047uF
50V
R74 20K
C62
0.
1uF
50V
G
1
D
2
S
3
Q7
1
M
E
15N
10-G
L7
1
47uH
/3
A
D7
1
S
S
310
GND
C71
33uF
100V
C75 1nF
50V
R95 3R3
GND
R77 10R
R76 0R
GND
GND
C73 *
C72
10nF
100V
D5
1
S
T
P
S
20L
CD
100C
R94 2R
GND
R3
2M
R4
2M
HV
C3
33uF
400V
D4
1
S
T
P
S
20L
CD
45C
1
2
R61 330R
R62 3.
3K
C61
1uF
50V
B
3
C
2
E
1
Q6
1
P
M
3904D GND
GND
nc
ZD
6
1
L
B
Z
X
84C8V
2L
T
1
+
12V
+
12V
A
L7
6
600R
/100M
h
z
C7
6
*
GND
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