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5
harman/kardon
D
IR
REMOTE_IR
CN403
C
CON6_1.25MM_DIP_B
1
2
RB5
3
RA1
4
IR
5
6
REMOTE_IR
DGND
B
CN404
CON3_2.54MM_DIP
3
STANDBY
3
2
5VON
2
1
1
DGND
A
5
4
5VON
Function describe:
1. IR signal receive and transmit.
IR401
HS0038B
2. Detect functional button and transmit.
3. control power indicator.
4. control SMPS board go to standby.
IR G VCC
5. control mute signal when power on
and power off.
DGND
VPP
C401 2.2uF
R404
470R
R405
0R
STANDBY
R406
4.7K
R407
5VON
R408
4.7K
4.7K
C
1
B
1
Q401
Q402
E
8550
8050
R412
R413
300R
560R
LED401
HFT503CPB0φ3
5VON
BLUE
AMBER
DGND
CE402
+
100uF/10V
DGND
4
3
RA1
RA0
U401
EM78P156ELM
1
18
P52
P51
2
17
P53
P50
3
16
TCC
OSCI
4
15
RESET
OSCO
5
14
VSS
VDD
6
13
P60/INT
P67
7
12
P61
P66
8
11
P62
P65
9
10
P63
P64
5VON
R409
4.7K
R410
4.7K
R411
4.7K
DGND
3
2
K401
Standby
Y401
1
2
4.000MHZ
3
4
1
2
3
C402
C403
K403
22pF
22pF
Pause
1
2
3
4
DGND
5VON
K405
Prev
+
C404
CE401
1
2
100nF
100uF/10V
3
4
DGND
RB7
RB6
RB5
RB4
PIN7 logic:
blue
blue
amber
amber
mute
Title
HD980 FRONT PANEL: Button board
Size
Document Number
A4
5575C
Date:
Tuesday, May 06, 2008
2
1
HD 980/230 Service Manual
D
K407
Display
1
2
3
4
K404
Stop
1
2
3
4
K402
Play
1
2
3
4
C
K406
Next
1
2
3
4
B
PIN9 logic:
unmute
unmute
mute
A
Rev
1.1
Sheet
1
of
2
1
Page 45 of 46
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