Read Harman Kardon HK CA280 Service Manual online
1
2
3
4
5
6
A
B
C
D
6
5
4
3
2
1
D
C
B
A
RCA INPUT L
BALANCED
INPUT
(UNIT GAIN)
INPUT
(UNIT GAIN)
OP
1
2
3
4
5
6
7
8
IMS INPUT
RJ45
diagnostic
IMS FL
IMS FL
IMS RR
IMS RL
IMS RL
IMS SUB
IMS GND
IMS FR
IMS GND
RCA INPUT R
OP
IMS FR
IMS GND
BALANCED
INPUT
(UNIT GAIN)
INPUT
(UNIT GAIN)
OP
BALANCED
INPUT
(UNIT GAIN)
INPUT
(UNIT GAIN)
OP
BALANCED
INPUT
(UNIT GAIN)
INPUT
(UNIT GAIN)
OP
IMS RL
IMS RR
IMS SUB
IMS GND
IMS GND
IMS GND
Mode select switch
FRT /REAR/SUB LEFT/STEREO/RIGHT
GAIN CONTROL
OP
GAIN CONTROL
OP
MODE HP/FLAT/LP
VARIABLE LPF/HPF
32Hz--320Hz/12dB
VARIABLE LPF/HPF
32Hz--320Hz/12dB
10 32
320
100K
MODE HP/FLAT/LP
VARIABLE LPF/HPF
32Hz--320Hz/12dB
VARIABLE LPF/HPF
32Hz--320Hz/12dB
10 32
320
100K
10 80
100K
SUB SONIC
FILTER
VARIABLE
FILTER
VARIABLE
10 80
100K
SUB SONIC
FILTER
VARIABLE
FILTER
VARIABLE
OP
OP
OP
OP
AUX OUT L
AUX OUT R
FRONT L CHANNEL
FRONT R CHANNEL
OP
MAIN AMP
FRONT L
FRONT L
AMP
2 ohm/4ohm
SPEAKER
MAIN AMP
FRONT R
FRONT R
AMP
2 ohm/4ohm
SPEAKER
SPEAKER
BTL-4ohm
Battery
+
-
-
Power Supply
+VCC
-VCC
+15V
-15V
REM
diagnostic
DIODE
REM
Block Diagram
CA280
S
W
IT
C
H
1
S
W
IT
C
H
2
1
2
3
4
5
6
7
8
IMS OUTPUT
RJ45
Page 9 of 12
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