Yamaha EF2800i Service Manual page 87

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Sub coil AC voltage inspection
Start the engine.
Measure the voltage between the Orange leads
of the sub coil 1 .
1
Or
G/Y Or
Or
G/Y
R Or
R
SVU4180
Sub coil AC voltage:
13.5 ~ 23.0 V
GOOD
Economy switch continuity inspection
Switch "ON" → Continuity
Switch "OFF" → No Continuity
GOOD
Replace the control unit.
GENERATOR SYSTEM
Or G/Y
Or R
TOO LOW
DOES NOT GENERATE
DISCONNECTED
Magnetic force is weak.
Replace the magneto rotor.
Sub coil resistance inspection
Stop the engine.
Measure the resistance between the Orange to
Orange lead. (Tester range: Ω × 1)
1
Or
G/Y
Or
G/Y
R
R
SVU4190
Sub coil resistance:
0.14 Ω ± 10 % at 20°C (68°F)
GOOD
Replace the stator coil assembly.
4-10
– +
ELEC
Or
Or
DISCONNECTED/
SHORT CIRCUIT