DA 3504 (serv.man14) - JBL Car Audio Service Manual (repair manual). Page 10

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Block  Diagram
Multichannel Automotive Amplifier
DA 3504
1
A
B
C
D
E
F
G
H
2
3
4
5
6
7
8
-VCC
+VCC
DRIVER
DRIVER
DRIVER
DRIVER
80Hz
120Hz
FLAT
PRE
AMP
80Hz
120Hz
FLAT
PRE
AMP
120Hz
80Hz
PRE
AMP
120Hz
FLAT
FLAT
80Hz
PRE
AMP
L+
POWER
 AMP
PROTECTION
L-
PROTECTION
R-
R+
POWER
 AMP
L+
POWER
 AMP
PROTECTION
L-
R+
R-
PROTECTION
POWER
 AMP
GND
DE  +12V
REM
L
L
HI-IN
PROTECTION
P.W.M
POWER
SUPPLY
DA3504 BLOCK DIAGRAM
HI-IN
L-CH
R
LOW-IN
FRONT/
 R-CH
L
R
L-CH
LOW-IN
FRONT/
 R-CH
BUFFER
BASS
BOOTS
ON
FLAT
BUFFER
BASS
BOOTS
ON
FLAT
CROSS
OVER
CROSS
OVER
BUFFER
BASS
BOOTS
ON
BUFFER
ON
FLAT
BASS
BOOTS
FLAT
CROSS
OVER
CROSS
OVER
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