Textron JACOBSEN GP400, Technical/Repair Manual

Page: 75 / 354

ELECTRICAL
4252490-Rev A 4-23
4
Raise/Lower Circuit—Theory of
Operation
Power Circuit
When the key switch is turned to the run position, voltage
is provided from key switch terminal B to control module
terminals J1-2, J2-11, and J2-12, powering up the control
module. (See “Power Circuit—Theory of Operation” on
page 4-14.)
Raise Circuit
When the raise/lower switch is placed in the raise
position, voltage is provided from the raise switch to
control module raise switch input terminal J2-2, activating
the input. With the input activated, the control module
raise solenoid output terminal J2-7 provides voltage to
the raise solenoid, energizing the solenoid. With the
solenoid energized, the cutting units will continue to rise
until the raise/lower switch is released.
When the raise/lower switch is momentarily placed in the
raise position, the control module energizes the raise
solenoid for approximately 2 seconds.
Lower Circuit
When the raise/lower switch is placed in the lower
position, voltage is provided from the lower switch to
control module lower switch input terminal J1-12,
activating the input. With the input activated, the control
module lower solenoid output terminal J2-8 provides
voltage to the lower solenoid, energizing the solenoid.
With the solenoid energized, the cutting units will
continue to lower until the raise/lower switch is released.
When the raise/lower switch is momentarily placed in the
lower position, the control module energizes the lower
solenoid for approximately 2 seconds.