Remote Control Transmitter - Yamaha RX-777 Service Manual

A
1

REMOTE CONTROL TRANSMITTER

SCHEMATIC DIAGRAM
2
VCC
IR1
IR-LED
R1
3
1 ohm
Q1
2SD1781KR
+ C1
47µF/16V
B1
C2
DC 3V
100pF
4
C3
100pF
Function Keychart
5
Key No.
1
2
3
5
6
7
8
9
6
10
11
12
14
15
16
17
18
19
20
7
B
IC1 JT7060-22
1 20
KI/O6 KI/O5
2 19
KI/O7 KI/O4
3 18
S0 KI/O3
4 17
S1 KI/O2
5 16
REM KI/O1
R2
220 ohm
6 15
VDD KI/O0
7 14
XOUT KI3
X1
455kHz
8 13
XIN KI2
9 12
GND KI1
C4
0.1µF
10 11
RESET KI0
Custom
Function Code Data
(Hex)
7A 1E
7A 1F
7A 04
7A 06
7A 01
7A 00
7A 02
7A 07
7A 03
7A 40
7A 4F
7A 0B
7A 08
7A 0A
7A 0D
7A 09
7A 0C
7A 11
C
29 30 31
25 26 27
21 22 23
17 18 19
13 14 15
9 10 11
5 6 7
1 2 3
Custom
Key No. Function Code
(Hex)
21 7A
22 7A
23 7A
24 7A
25 7A
26 7A
27 7A
28 7A
29 7A
30 7A
31 7A
32 7A
33 7A
34 7A
D
RX-777
RX-777
32
28
24
20
16
12
8
4 34
1 2
3
6 7
Data
10
9 10
12
16
12
15
14
14 15
54
0F
17 18
18
57
20 21
17
9A
23 24
9B
1B
26 27
1A
29
31
33
E
33
5
8
11
16
19
22
25
28
30
32
34
39