Read Sharp DV-L80 (serv.man4) Service Manual online
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
A
B
C
D
E
F
G
H
I
J
DV-L80S/W
DV-L80S/W
28~29
9-4. POWER 2 BLOCK DIAGRAM
R9021
R9027
R9025
R9023
R9020
R9031
+IN1(E)
CH1
Error Amp.1
–IN1(E)
–IN1(C)
DTC1
FB1
R9028
A
A
B
C
D
R9001
R9012
R9009
R9006
R9005
R9017
+IN2(E)
–IN2(E)
–IN2(C)
DTC2
FB2
R9013
B
R9008
R9016
R9018
R9004
R9003
R9011
R9010
+IN3(E)
–IN3(E)
–IN3(C)
DTC3
FB3
R9014
C
R9019
R9032
R9024
R9030
R9026
R9022
+IN4(E)
–IN4(E)
–IN4(C)
DTC4
FB4
R9029
D
+
–
+
–
+
–
+
–
–
7
6
5
8
4
VREF
VREF
Comp.1
DTC Comp.1
PWM Comp.1
IC9001
OFF Electric
current setting
current setting
2.5V
2V
1
48
45
Ca1
Cb1
Vcc2
Vcc2
OUT1
VE1
C9019
DC IN
C9021
Q9004
C9030
C9036
C9033
D9003
+
–
D9006
Q9901
D3.3V SW
Q9902
A3.3V SW
3.3V
L9007
3.2V SWITCHING
R9035
46
47
CH2
Error Amp.2
+
–
+
–
+
–
+
–
–
12
11
10
13
9
VREF
VREF
Comp.2
DTC Comp.2
PWM Comp.2
OFF Electric
current setting
current setting
2.5V
2V
3
2
Ca2
Cb2
Cb2
OUT2
VE2
C9015
C9023
R9036
44
43
CH3
Error Amp.3
+
–
+
–
–
+
+
25
26
27
24
28
0.6V
100
Ω
Comp.3
PWM Comp.3
OFF Electric
current setting
current setting
2.5V
34
35
Ca3
Cb3
Cb3
OUT3
VE3
C9016
C9024
R9037
41
–
+
–
–
–
–
–
+
–
Ca4
CH4
Error Amp.4
+
–
+
–
–
+
+
30
31
32
29
33
0.6V
100
Ω
1.2V
1
µ
A
S
R
Latch
Low input
voltage,
protection circuit
voltage,
protection circuit
2.1V
Comp.4
SCP Comp.
DTC
Comp.3
Comp.3
VREF
SCP
C9004
PWM Comp.4
OFF Electric
current setting
current setting
2.5V
38
37
Cb4
OUT4
VE4
C9020
C9025
R9038
39
38
OSC.
VCC ON/OFF
CTL
CTL
Ref.
23
14
42
15
16
RT
CT
VREF
GND
R9007
C9003
17
2.5V
–1.9V
–1.3V
–1.3V
CTL2
CTL3
CTL3
Vcc1
CTL1
19
20
18
22
21
5V
Q9002
Q9003
Q9001
C9027
C9029
T9001
C9034
D9004
D9005
C9031
D9001
+
–
–
D9007
L9005
L9006
5V SWITCHING
SWITCHING
2.5V
–16V
–5V
7.5V
13V
C9028
C9035
C9032
D9002
+
–
–
D9008
2.5V SWITCHING
1
2
3
4
5
10
9
8
7
6
Q9903
D5V SW
Q9905
A5V SW
AT_A5V
Q9909
Q9913
Q9914
D2.5V SW
DVD P-CONTROL
Q9907
M5V SW
D9902
P-CON-H
2
1
1
4
3
1
2
40
Low input voltage, protection circuit
3
4
