Sharp DV-L88S/S Service Manual page 26

DV-L88S/S(H)
DV-L88W/W(A)
9-3. POWER 1 BLOCK DIAGRAM
J
I
H
DC JACK F901 L9801
1
G
C921
2
D901
F
F902
BATTERY TERMINAL
BATT 1
BATT 2
GND 3
GND 4
E
D
C
B
A
1 2 3
Q904
1 S1 D1 D2 S2 3
7,8 5,6
R932
G1 G2
D9 04
Q905
2 4
D905
3 5
R933
R906
R9 03
2 6
4 R9 04
C922
3
R951
OPEN
3 1
D902
2
Q906
4
G2
5,6 3
D2 S2
D1 S1 1
7,8
G1
2
Q907
D
Q913
G
S
Q901
1 S1 D1 D2 S2 3
7,8 5,6
G1 G2
4
2
D901
4 5 6 7 8
R925
COUT
C910
R922
FB2
15
Error
IC901
–IN2
Amp.2
14 –
+IN2
13 +
C911
FB1
6
R927
Error
R921
–IN1 Amp.1
7 –
R926
+IN1
R923 8 +
DTC
16
R920
SCP
C908 Comp.
–
+
+
1µA
2.1 V 1.1 V
bias
CSCP
5
C909
S R
Latch
R916 R918
D
S G
R941
Q911
Q912
D
R924 R928
G
S
Q910
6 2
1
3 5
4
9 10 11 12 13
28~29
–INC +INC
12 9 10
R912
Q908
Current
– 1,5,8
Amp. Out 100kΩ R940
X 25 5 D
18
+
2,3,6,7
Vcc L901
4 G
PWM
+ Comp.
+
D906
+
C901
19
+
OUT –
–
C903 C904
+
–
20
1V
VE
DTC
Comp.
1.9V
1.3V
D909
bias Vcc
3
CTL
2
OSC Ref CTL
UVLO 17
1
2.5V
R919
4 2 3 1 11
RT CT VREF
R917
C907
C905
R931 D910
R930
R929
14 15 16 17
DV-L88S/S(H)
DV-L88W/W(A)
AC POWER
INV. V out
L902
DC. V out
+
C912
–
Q909
A-Amp 4.5V
BATTERY-i (AD)
Charge On Control
Trickle (H)
Power-H
DC-IN (H)
BAT. V (AD)
SWITCH (L)
18 19 20