5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
Function describe:
1. IR signal receive and transmit.
2. Detect functional button and transmit.
3. control power indicator.
4. control SMPS board go to standby.
5. control mute signal when power on
and power off.
unmute
mute
PIN7 logic:
amber amber
blue unmuteblue
mute
PIN9 logic:
AMBER
WHITE
5575C 1.6
HD980 FRONT PANEL: Button board
A4
12Saturday, December 06, 2008
Title
Size Document Number Rev
Date: Sheet
of
STANDBY
RB7
VPP
RB6
RB4
RA0
RB5
REMOTE_IR
IR
RA1
STANDBY
IR
5VON
RA1
REMOTE_IR
RB5
DGND DGND
5VON
5VON
5VON
5VON
DGND
DGNDDGND
DGND
DGND
DGND
5VON
+
CE402
100uF/10V
12
C402
22pF
CN403
1
2
3
4
5
6
R401 15K
K405
Prev
1
3
2
4
K403
Pause
1
3
2
4
C406 100nF
R411 4.7K
R408
4.7K
K402
Play
1
3
2
4
R415
0R
K406
Next
1
3
2
4
C401 2.2uF
Y401
4.000MHZ
1 2
3
IR G VCC
IR401
HS0038B
1
2
3
K407
Display
1
3
2
4
LED401
1
2
3
C403
22pF
R412
470R
CN404
1
2
3
1
2
3
C405 100nF
R410 4.7K
R402 4.7K
K401
Standby
1
3
2
4
+
CE401
100uF/10V
12
R414
0R
D401 LL4148
1 2
U401
EM78P156ELM
1
2
3
4
5
6
7
8
9
17
18
10
11
12
13
14
15
16
P52
P53
TCC
RESET
VSS
P60/INT
P61
P62
P63
P50
P51
P64
P65
P66
P67
VDD
OSCO
OSCI
R404 470R
LED402
Amber
12
B
C
E
Q402
8050
1
3 2
K404
Stop
1
3
2
4
R407
4.7K
R406 4.7K
R413
820R
B
C
E
Q401
8550
2 3
1
R403 4.7K
R409 4.7K
C404
100nF
LED403
White
12
HD 990 harman/kardon
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