Checking The Lighting Coil; Checking The Rectifier Regulator - Yamaha F100C Service Manual

– +
ELEC

Checking the lighting coil

1. Measure the lighting coil output peak
voltage. Replace the lighting coil if below
specification.
Digital circuit tester: 90890-03174
Peak voltage adaptor: 90890-03172
Test harness (3 pins): 90890-06770
Lighting coil output peak voltage:
White (W) – White (W)
Unloaded
r/min
Cranking
DC V 7.5 8.0
Lighting coil resistance (use as
reference):
White (W) – White (W)
0.32–0.48 Ω at 20 °C (68 °F)
8-21
Electrical systems
S60C8130
Loaded
1,500 3,500
15.5 15.5

Checking the Rectifier Regulator

1. Measure the Rectifier Regulator output
peak voltage. If below specification, mea-
sure the lighting coil output peak voltage.
Replace the Rectifier Regulator if the out-
put peak voltage of the lighting coil is
above specification.
Digital circuit tester: 90890-03174
Peak voltage adaptor: 90890-03172
Rectifier Regulator output peak
voltage:
Red (R) – Black (B)
r/min
1,500
DC V 17.5
NOTE:
Disconnect the output lead (red lead) of the
Rectifier Regulator when measuring the out-
put peak voltage.
S60C8150
Unloaded
3,500
19.0
60C5D11