Yamaha F40BED, Service Manual, Page: 494 / 537

ENRICHMENT CONTROL SYSTEM
8-32
E
– +
ELEC
CHECKING THE BATTERY
Refer to "CHECKING THE BATTERY" on
page 3-21.
CHECKING THE FUSE
Refer to "CHECKING THE FUSES" on
page 8-22.
CHECKING THE MAIN SWITCH
Refer to "CHECKING THE MAIN SWITCH"
on page 8-18.
CHECKING THE POWER COIL
OUTPUT PEAK VOLTAGE
Measure:
• Power coil output peak voltage
Below specification
→
Replace the
Power coil.
CHECKING THE THERMO HEATER
PLUNGER
1. Measure:
• Thermo heater resistance
Out of specification
→
Replace.
2. Measure:
• Thermo heater plunger projection
length
Out of specification
→
Replace.
Y/B
Y/B
Output peak voltage
Y/B - Y/B
r/min.
Cranking
1,500 3,500
Opened Closed
D.C. V 15 7 25 67
Peak voltage adaptor
YU-39991/90890-03169
a
Thermo heater resistance
Yellow/Black (Y/B) -
Yellow/Black (Y/B)
18
Ω
Ω Ω
Ω
- 19
Ω
Ω Ω
Ω
at 20 °C (68 °F)
a