Yamaha R1 Series 2015 Service Manual page 678

"a", check that the output voltage is within the
specified values.
Output voltage
More than 5 V
f. When turning the wheel switch in direction
"b", check that the output voltage is within the
specified values.
Output voltage
Less than 0.5 V
2
4
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a
3
b
1
ELECTRICAL COMPONENTS
8-197