Yamaha F20A, Service Manual

Page: 376 / 444

8-10
– +
ELEC
E
ELECTRICAL ANALYSIS
●
When measuring the peak voltage, con-
nect the peak voltage adaptor to the digi-
tal tester and switch the selector to the
DC voltage mode.
NOTE:
●
Make sure the adaptor leads are properly
installed in the digital circuit tester.
●
Make sure the positive pin (the “+” mark
facing up as shown) on the adaptor is
installed into the positive terminal of the
tester.
●
The test harness is needed for the follow-
ing tests.
Å
Voltage measurement
ı
Peak-voltage measurement
Å
ı
Test harness (for the pulser coil and stator
coil)
Test harness:
YB-06768/90890-06768
Checking steps:
●
Disconnect the original coupler con-
nections.
●
Connect the test harness between the
original couplers.
●
Connect the digital tester terminals to
the terminals which are being checked.
●
Start or crank the engine and observe
the measurement.