Kohler 40COZ/33CFOZ Service Manual page 72

No output voltage is
detected
If no voltage is detected,
remove the G and F+ (red)
leads from the SCR assembly.
Jumper G and AC on the SCR
assembly.
If high voltage is
detected, replace the
photo transistor board
Replace the rotor
Figure 7-1 Troubleshooting Generator, No Output Voltage
58 Section 7 Component Testing and Adjustment
Is the safeguard circuit
breaker in the ON position?
Yes
Do a flashlight test on the
photo transistor board. (See
Section 7.3, LED Circuit Board
Test)
If high voltage is detected,
check for battery voltage at
the voltage
battery voltage present?
If no voltage is detected,
test the rotor. Do the
exciter armature and
main field windings
check out okay?
No Yes
Replace the SCR
assembly
Place the safeguard circuit
No
breaker to the ON position
No
regulator. Is
Check DC voltage at the
Yes
LED circuit board
If no DC voltage is present,
unplug the connector at the
LED circuit board and check
voltage
If no DC voltage is present,
check the wiring between
the voltage regulator and
the LED circuit board.
Does wiring check out
okay?
No Yes
Repair/replace Replace
the wiring the regulator
Check the wiring to the
voltage regulator
If DC voltage of
6--12 volts
present, replace the
LED circuit board.
(LED is open)
If DC voltage of 6--12 volts
is present, replace the
LED circuit board. (LED
or flyback diode is shorted
and/or grounded)
voltage
TP-5737 5/01
is