Yamaha YW50P Service Manual page 184

E.EOT.,O STA.T,°O SVSTEM I E'EC I I
. Measure:
• Brush length (~
Out of specification-->Replace.
I ~ 1 Brush length wear limit
3.0 mm (0.012 in)
.
Measure:
• Brush spring force
Fatigue/out of specification-->Replace as
a set.
7-25