Yamaha e60hwd, Service Manual

Page: 180 / 199

ELEC
8-21 69D5G11
Electrical systems
Checking the rectifier (WHD, WD)
1. Measure the rectifier output peak volt-
age. If below specification, measure the
lighting coil output peak voltage. Replace
the rectifier if the output peak voltage of
the lighting coil is above specification.
NOTE:
After starting the engine, disconnect the out-
put lead (red lead)
1
of the rectifier when
measuring the output peak voltage.
Checking the lighting coil
1. Measure the lighting coil output peak
voltage. Replace the lighting coil if below
specification.
Digital circuit tester: 90890-3174
Digital circuit tester: 90890-3174
Peak voltage adaptor B:
90890-03172
Rectifier output peak voltage:
Red (R) — Black (B)
r/min
Unloaded
1,500 3,500
DC V 20 40
69D80130
Lighting coil output peak voltage:
Green (G) – Green (G)
r/min
Unloaded
Cranking 1,500 3,500
DC V 5.0 20.0 40.0
Lighting coil resistance
(reference data):
Green (G) – Green (G)
MHD:
1.3 – 1.6
Ω
at 20°C (68°F)
(2-Lighting coil model)
WHD, WD:
0.4 – 0.5
Ω
at 20°C (68°F)
(1-Lighting coil model)
1
69D80130
69D5G11_08 04.9.24 9:22 Page 22