Sharp DV-L88S/S Service Manual page 27

DV-L88S/S(H)
DV-L88W/W(A)
9-4. POWER 2 BLOCK DIAGRAM
J
I
R9025
H
R9027
A
+IN1(E)
R9023
–IN1(E)
R9021
R9020
FB1
R9028
–IN1(C)
R9031
DTC1
G
R9009
R9012
B
+IN2(E)
R9006
–IN2(E)
R9005
R9001
FB2
R9013
–IN2(C)
R9017
F DTC2
R9003
R9004
R9015
+IN3(E)
C
–IN3(E)
R9011
FB3
R9008 R9010 R9014
–IN3(C)
R9018
DTC3
E
R9030
R9024
+IN4(E)
D
–IN4(E)
R9026
FB4
R9019 R9029
R9022
–IN4(C)
DTC4
D
R9032
SCP
C9004
C
B
A
1 2 3
IC9001
CH1
Error Amp.1
PWM Comp.1 OFF Electric
+
7
–
current setting
– –
6 +
+
5
–
VREF
VREF Comp.1
+
2V
– DTC Comp.1
8
2.5V
4
CH2
Error Amp.2
PWM Comp.2
+ OFF Electric
12
–
current setting
– –
11 +
+
10
–
VREF
VREF Comp.2
+
2V
– DTC Comp.2
13
2.5V
9
CH3
Error Amp.3
25 +
PWM Comp.3 OFF Electric
+
current setting
–
26 +
–
27
Comp.3
100Ω
+
0.6V
–
24
2.5V
28
CH4
Error Amp.4
+ PWM Comp.4
30
OFF Electric
+
current setting
–
+
31
–
32
Comp.4 100Ω
+
0.6V
–
29
2.5V
33
SCP Comp. –
–
–
–
+
2.1V
–
–1.9V
–
DTC
+
–1.3V
Comp.3
1µA 1.2V
VREF
23
S R
Low input OSC. Ref. VCC ON/OFF
voltage,
Latch
CTL
protection circuit
2.5V
14 15 16 17 19 42
Low input voltage, protection circuit
RT CT VREF GND
R9007
C9003
4 5 6 7 8
DC IN
CP9002
Ca1
C9019
1
Cb1
48
Vcc2
45
A
OUT1
Q9002
46
5V SWITCHING
C9021
L9004
R9035
+ C9048
C9030
47
VE1 –
D9001 C9031
3
C9015
Ca2
2
Cb2 Q9001 SWITCHING
D9004
1 10
2 9 2 3
OUT2 1 4
3 8
44
C9030 4 1
4 7
C9023 3 2
5 6
R9036
T9001 D9005
43
VE2
B
34
C9016
Ca3
35
C
Cb3
Q9004
L9007
3.3V SWITCHING
C9027
+ C9049
OUT3
D9003 C9033
40
–
C9024
R9037
41
VE3
Q9003 L9006
38 C9020
D
Ca4
1.8V SWITCHING
37
Cb4
C9028
+
D9002 C9050
– C9032
OUT4
39
C9025
R9038
38
VE4
21
CTL2
22 CTL3
DVD_PCON
18 Vcc1
20
CTL1
9 10 11 12
30~31
Q9907
Q9903
1 6
2
4 3
5
5V
D9007
13V
7.5V
–5V
–16V
3.3V
D9006
1.8V
D9008
P-CON-H
13 14 15 16
DV-L88S/S(H)
DV-L88W/W(A)
M_5V
D_5V
A_5V
AT_A_5V
A_3.3V
D_3.3V
D_1.8V
Q9913
Q9914
DVD P-CONTROL
17 18 19 20