Harman Kardon HK 990/230 Service Manual page 116

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