Read Harman Kardon HK 990 Service Manual online
1
2
3
CN15
3P(2.0)
L3
10uH
L2
10uH
L1
10uH
1
2
3
4
IC5
LTV817A
R24
47K
R22
47
R23
47
R28
270
R25
75
R26
10
R27
3K9
3K9
C31
100U10V
C30
104
C34
104
C33
104
104
C32
47U10V
TO MCU BOARD
1
2
3
JK1
CKX3.5-12A 3.5mm
1
2
3
JK2
CKX3.5-12A 3.5mm
IR IN/OUT BOARD
REMOTE
DGND
REMOTE
MCU+5V
Q5
A1015
1
2
3
4
5
CN12
5P(2.0)
C49
104
DCD
1
RXD
2
TXD
3
DTR
4
GND
5
DSR
6
RTS
7
CTS
8
RI
9
10
11
JK3
DB-09
C1+
1
V+
2
C1-
3
C2+
4
C2-
5
V-
6
T2out
7
R2in
8
R2out
9
T2in
10
T1in
11
R1out
12
R1in
13
T1out
14
GND
15
VCC
16
IC8
MAX232CDR
C4
104
C48
104
C35
104
C15
104
C8
104
+5v
+5v
RX
GND
TX
TO Preamp
RX
TX
MCU1
MCU2
1
3
5
2
4
6
K16
SK-22H03G6-RS
R86
22K
R88
22K
R89
22K
R87
10K
10K
IR OUT
IR IN
D5
1N4148
D6
1N4148
Q17
A1015
A1015
114
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