Yamaha RX-A760, Руководство по обслуживанию

Страница: 80 / 170

80
RX-V681/RX-A760
RX-V681/RX-A7
60
Key detection for A/D port
Key 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 91 pin
0 – 0.1 5 V 0.1 5 – 0.42 V 0.43 – 0.70 V 0.71 – 0.97 V 0.98 – 1.24 V 1.2 5 – 1. 5 3 V
A/D value
(3.3 V=2 55 )
0 – 11 12 – 32 33 – 5 4 55 – 7 5 76 – 9 5 96 – 118
KEY1
RADIO
(SCENE4)
NET
(SCENE3)
TV
(SCENE2)
BD/DVD
(SCENE1)
ZONE
CONTROL
ZONE2
+ 3.3 k Ω + 4.7 k Ω + 2.2 k Ω + 3.3 k Ω
Detected voltage value
at 91 pin
1. 5 4 – 1.84 V 1.8 5 – 2.22 V 2.23 – 2.62 V 2.63 – 3.04 V
A/D value
(3.3 V=2 55 )
119 – 142 143 – 162 178 – 197 198 – 229
KEY1
INPUT > INPUT <
MAIN ZONE z
(power)
TONE
CONTROL
(RX-V681 model)
0
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 92 pin
0 – 0.1 5 V 0.16 – 0.42 V 0.43 – 0.70 V 0.71 – 0.99 V 1.00 – 1.27 V 1.28 – 1. 5 6 V
A/D value
(3.3 V=2 55 )
0 – 11 12 – 32 33 – 5 4 55 – 77 78 – 98 99 – 120
KEY2
PURE
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 92 pin
1. 5 7 – 1.86 V 1.87 – 2.14 V 2.1 5 – 2.39 V 2.40 – 2.6 5 V 2.66 – 2.91 V 2.92 – 3.17 V
A/D value
(3.3 V=2 55 )
121 – 143 144 – 16 5 166 – 18 5 186 – 20 5 206 – 22 5 226 – 24 5
KEY2
PRESET
<
MEMORY INFO STRAIGHT
PROGRAM
>
PROGRAM
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