Charging System; Checking The Lighting Coil; Checking The Rectifier Regulator - Yamaha E115A Service Manual

Charging system

Checking the lighting coil

1. Disconnect the lighting coil connector.
2. Connect the probe to the lighting coil.
3. Measure the lighting coil output peak
voltage. Replace the stator assembly if
less than specification.
Lighting coil output peak voltage:
Green (G) – Green/white (G/W)
Unloaded
r/min
Cranking
DC V 8.0
4. Connect the digital circuit tester to the
lighting coil connector.
5. Measure the lighting coil resistance.
Replace the stator assembly if out of
specification.
Lighting coil resistance
(reference data):
Green(G) – Green/white (G/W)
0.36–0.54 Ω at 20°C (68°F)
61U5H11
61U80050
1,500 3,500
31.0 72.0
61U80170
Starter motor (WH, E, ET)/Charging system

Checking the Rectifier Regulator

1. Disconnect the Rectifier Regulator (R)
connector, then connect the digital circuit
tester to Rectifier Regulator (R) connec-
tor and ground
2. Measure the Rectifier Regulator output
peak voltage. If less than specification,
measure the lighting coil output peak
voltage. Replace the Rectifier Regulator if
the output peak voltage of the lighting coil
is more than specification.
DCV
NOTE:
Do not use the peak voltage adaptor when
measuring the output peak voltage of the
Rectifier Regulator.
Rectifier Regulator output peak voltage:
Red (R) – Ground (B)
r/min
1,500
DC V 13
R
61U80040
Unloaded
3,500
13
8-16
1
2
3
4
5
6
7
8
9