Read Harman Kardon HD 950 Service Manual online
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.
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
unmute
blue
mute
PIN9 logic:
AMBER
BLUE
EM78P156ELM-G
PIC16F54-I/SOG
R417=N/A
R418=0R
R418=0R
R417=0R
R418=N/A
R418=N/A
Configuration table
3566C
1.2
HD950 FRONT PANEL: Button board 060921
A4
1
2
Friday, September 22, 2006
Title
Size
Document Number
Rev
Date:
Sheet
of
RB4
RB5
VPP
RB6
RA0
STANDBY
RA1
IR_IN
IR
IR
MCU_MUTE
RB7
STANDBY
IR
5VON
RA1
MCU_MUTE
IR_IN
RB5
DGND
DGND
5VON
5VON
5VON
5VON
5VON
DGND
DGND
5VON
DGND
DGND
DGND
DGND
DGND
DGND
C402
22P
22P
CN404
3pin 2.54mm
1
2
3
LED401
1
2
3
U401
EM78P156ELM-G or PIC16F54-I/SOG
EM78P156ELM-G or PIC16F54-I/SOG
1
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
9
17
18
10
11
12
13
14
15
16
RA2
RA3
T0CKI
MCLK/VPP
VSS
RB0
RB1
RB2
RB3
RA3
T0CKI
MCLK/VPP
VSS
RB0
RB1
RB2
RB3
RA0
RA1
RB4
RB5
RB6
RB7
VDD
OSC2/CLKOUT
OSC1/CLKIN
EC402
100uF/10V
100uF/10V
R412
4.7K
R417
0R N/A
0R N/A
K401
Standby
1
4
3
2
R420
0R
0R
R413
100R
100R
K408
Next
1
4
3
2
R414
4.7K
4.7K
IR401
IR
IR
3
2
1
VCC
GND
IR
R419
0R
0R
R421
0R
0R
R404
470R
C406
104
R410
4.7K
D401
1N4148
R408
4.7K
4.7K
R403
4.
7K
R411
4.7K
R422
0R
0R
R406
4.7K
K403
Display
1
4
3
2
C
B
E
3
2
1
Q401
8550
8550
R409
4.7K
4.7K
C
B
E
3
2
1
Q403
8050
8050
K404
Pause
1
4
3
2
C403
22P
22P
C
B
E
3
2
1
Q402
8550
8550
C401
2.2uF
2.2uF
C404
104
104
R401
4.
7K
K406
Stop
1
4
3
2
EC401
47uF/10V
47uF/10V
CN403
7pin 1.25mm
1
2
3
4
5
6
7
2
3
4
5
6
7
K407
Prev
1
4
3
2
R407
1K
1K
R402
15K
R405
100R
C405
104
R418
0R
Y401
4.000MHZ
K405
Play
1
4
3
2
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