IC Block Diagrams
-6-
IC501 < Vertical Output > LA7841
THERMAL
PROTECTION
PUMP
UP
AMP
-
+
G
N
D
V
e
r.
O
u
tp
u
t
O
u
tp
u
t
S
ta
g
e
V
c
c
N
o
n
I
n
v.
I
n
p
u
t
In
v
e
rt
in
g
In
p
u
t
V
c
c
P
u
m
p
U
p
O
u
tp
u
t
LA7841
1
2
3
4
5
6
7
IC001 < Audio AMP. > LA4600
10
7
Standby SW
Ch1
Input
amplifier
R
f1
Ch1 input
9
Small signal
GND
8
Ch2 Input
6
P.P
REF
amplifier
R
f2
R
Nf1
R
Nf2
Ch2
Input
amplifier
Pop noise prevention block
Pre-
drive
amplifier
Pre-
drive
amplifier
4
1
Output
amplifier
TSD protector
2
Ch1 output
Large signal
GND
3
Output
amplifier
Ripple filter
5
Filter
Standby
Vcc
Ch2 output
IC611 < Switching Regulators > QXXAVB325
START
O.V.P
LATCH
REG.
T.S.D
Iconst
Rconst-
R2
O.S.C
-
+
Comp.2
Vth(2)
C1
R1
DRIVE
-
+
Comp.1
Vth(1)
R4
R3
5
1
2
3 Drain
Terminal
Source
Terminal
Over current/
Feed Back
Terminal
GND
4
Power Supply
O.V.P: Overvoltage protection circuit
T.S.D: Thermal shutdown circuit
Summary of Contents for 1 113 549 00
Page 36: ...Oct 00...
