Yamaha RX-V483/HTR-4071, Service Manual

Page: 81 / 153

81
RX-V483/HTR-4071
RX-V483/HTR-4071
K ey detection for A/D port
K ey input (A/D) pull-up resistance: 10 k-ohms
0 Ω + 1.0 k Ω + 1.0 k Ω + 1. 5 k Ω + 1. 5 k Ω + 2.2 k Ω
Detected voltage
value at 9 1 pin
0 – 0.1 5 V 0.1 5 – 0. 4 2 5 V 0. 4 2 5 – 0.703 V 0.703 – 0. 9 7 8 V 0. 9 7 8 – 1.2 4 1 V 1.2 4 1 – 1. 5 3 6 V
A/D value
(3.3 V=2 55 )
0 – 11 12 – 32 33 – 54 55 – 7 5 7 6 – 95 96 – 11 8
K EY1
RADIO
(SCENE 4 )
NET
(SCENE3)
TV
(SCENE2)
BD/DVD
(SCENE1)
+ 3.3 k
Ω
+ 4 .7 k
Ω
+ 13.2 k
Ω
+ 22 k
Ω
+ 33 k
Ω
Detected voltage
value at 9 1 pin
1. 5 3 6 – 1. 84 V 1. 84 – 2.102 V 2.102 – 2.2 99 V 2.33 6 – 2. 55 V 2. 55 – 2. 9 71 V
A/D value
(3.3 V=2 55 )
11 9 – 1 4 2 1 4 3 – 1 6 2 1 6 3 – 177 1 8 1 – 1 9 7 1 98 – 22 9
K EY1
INPUT
>
INPUT
<
z
(power)
INFO
0 k
Ω
+ 1.0 k
Ω
+ 1.0 k
Ω
+ 1. 5 k
Ω
+ 1. 8 k
Ω
+ 2.2 k
Ω
Detected voltage
value at 9 2 pin
0 – 0.1 5 V 0.1 5 – 0. 4 2 5 V 0. 4 2 5 – 0.703 V 0.703 – 0. 999 V 0. 999 – 1.27 9 V 1.27 9 – 1. 564 V
A/D value
(3.3 V=2 55 )
0 – 11 12 – 32 33 – 54 55 – 77 7 8 – 98 99 – 120
K EY2 DIRECT
TUNING
>>
TUNING
<<
AM FM
PRESET
>
+ 3.3 k
Ω
+ 4 .7 k
Ω
+ 6 . 8 k
Ω
+ 10 k
Ω
+ 22 k
Ω
+ 68 k
Ω
Detected voltage
value at 9 2 pin
1. 564 – 1. 86 V 1. 86 – 2.1 4 2 V 2.1 4 2 – 2.3 99 V 2.3 99 – 2. 65 3 V 2. 65 3 – 2. 9 1 9 V 2. 9 1 9 – 3.17 5 V
A/D value
(3.3 V=2 55 )
121 – 1 4 3 1 44 – 1 65 1 66 – 1 85 1 86 – 20 5 20 6 – 22 5 22 6 – 2 45
K EY2
PRESET
<
MEMORY
TONE
CONTROL
STRAIG H T
PROGRAM
>
PROGRAM
<