Yamaha MCR-330, Service Manual

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30
CRX-330/NS-BP100
CRX-330/NS-BP1
0
0
7 - 5 D E S T : 2 1 1
7 - 6 2 5 5 2 5 5 2 5 5
7-5 DESTINATION (Destination detection)
The voltage at 94 pin of microprocessor (IC211) is displayed with 3.3V/255 as a reference.
Display 194 – 233
Destination B
7-6 KEY0 / KEY1 / KEY2
(Panel key of this unit detection)
The voltage at 97 pin (KEY0), 95 pin (KEY1) and 70 pin (KEY2) of microprocessor IC211 are displayed with 3.3V/255
as a reference.
When the A/D value of the panel key becomes out of the specified range, normal operation will not be available.
In this case, check the constant of voltage dividing resistor, solder condition, etc. Refer to table.
Display Ohm Key 0 Key 1 Key 2
0 – 16 0 INPUT
17 – 48 + 1.5 k PLAY/PAUSE
49 – 79 + 1.8 k STOP
80 – 111 + 2.7 k OPEN/CLOSE
239 – 255 ∞ OFF OFF OFF
KEY2 (Not applied to this model.)
KEY1
KEY0