TM5-6115-593-34
NAVFAC P-8-631-34
TO-35C2-3-463-2
Legend for Figure 4-6.
1.
Capacitor
7.
Jumper
13.
Terminal Board
2.
Screw
8.
Screw
14.
Terminal Board
3.
Clip
9.
Washer
15.
Decal
4.
Screw
10.
Screw
16.
Warning
5.
Printed Circuit Board
11.
Plate
17.
Chassis
6.
Jack
12.
Spacer
18.
Resistor
(3)
Turn on AC signal generator. Set
generator to 1,800 Hz at 2 to 6 volts
rms.
(4)
Voltage measured on DC voltmeter
should approximate OV DC.
(5)
Slowly
turn
the
speed
pot
counterclockwise until the actuator
voltage slowly starts to increase
toward 8V DC. This means the speed
setting has just crossed below the
speed (frequency) signal.
(6)
Decrease the frequency until the
actuator voltage starts to decrease.
This simulates a decrease in speed
and normal control response.
(7)
Open
the
RAMP
SPST
switch
connected to terminals 14 and 15.
Increase
the
signal
generator
frequency until the actuator voltage
decreases. The actuator voltage will
increase to 8V DC, and drop when the
frequency reaches idle speed.
(8)
Close the RAMP switch. The actuator
voltage will fluctuate, and then settle
at minimum voltage.
(9)
Turn off the signal generator. The
actuator voltage will go to 8V DC,
verifying
the
fail
safe
circuit
is
working.
(10)
Turn on the signal generator and
move signal general frequency from
below to above rated frequency to
simulate a speed increase. The
actuator
voltage
should
increase
towards 8V DC. Move frequency
below rated speed. Actuator voltage
will decrease.
(11)
Close the MINIMUM FUEL switch
between 22 and 23. DC voltage
should go to 8 volts.
4-16. REPAIR. Repair the governor controller as
follows:
a.
Disassembly of Chassis
(1)
Remove terminal boards (13 and 14,
figure 4-6), by removing screws (8
and 10), washers (9) warning plate
(11), washer (9), spacer (12), and
washer (9).
(2)
The printed circuit board assembly (5)
is accessible by removing four screws
(4) and unsoldering connections to
terminal boards.
b.
Repair
of
Printed
Circuit
Board
Components.
NOTE
For repairs use a pencil-type low
wattage soldering iron.
(1)
When replacing 3-watt or 5-watt
resistors, mount them at least 1/16
inch (1.6 mm) above printed circuit
board.
(2)
When replacing transistors Q2, Q4, or
Q5,
mount
washer
between
the
printed
circuit
board
and
the
transistor.
4-13