Table 7-2. Electric Governor Control Unit Component Values
50/60 Hz Unit
400 Hz Unit
Component
(ohms)
(ohms)
Remarks
R1, R1A, R15
500
500
3.0% tolerance
Rll
5000
5000
R4, R8, R22
5100
5100
3.0% tolerance
R37
5100
3500
R2, R10
1250
750
3.0% tolerance
R12, R18
10,000
10,000
3.0% tolerance
R16
25,000
25,000
3.0% tolerance
R14, R20
3,000
3,000
3.0% tolerance
Parallel winding
Less than 1.0
Less than 1.0
Check for open
(nominal )
(nominal)
Feedback winding
Less than 1.0
Less than 1.0
Check for open
(nominal)
(nominal)
Frequency control
Less than 1.0
Less than 1.0
Check for open
winding
(nominal)
(nominal)
Bias control winding
Less than 1.0
Less than 1.0
Check for open
(nominal)
(nominal)
Grade S, Type PUR.
h. When compound has cooled and is substantiality
b. See figure 7-2 and reassemble control unit
components.
c. Reconnect cover to printed circuit board with
wiring harness.
d. Place the container in a temperature controlled
oven. Set oven temperature at 180 to 185°F and allow
container to soak 11 to 12 hours or until potting com-
pound is completely melted.
e. Prior to installing the printed circuit board,
remove the container from the oven and make sure
that insulation paper is positioned next to the
container shell.
f. Using heavy gloves, and safety glasses slowly
lower the printed circuit board into the potting com-
pound,
WARNING
Use care not to splash hot potting
compound om operating personnel. It
can cause severe injury.
g. Position the printed circuit board and allow
compound to cool.
solid, install top cover and hardware.
7-8. Adjustment.
See figure 7-13 for location of adjustment and controls
and adjust electric governor according to the following
procedures
a .
S i n g l e S e t A d j u s t m e n t P r o c e d u r es
(1) With engine not operating, set frequency
adjust control (on control panel), R11, R14, R16, and
R18 to midpoint by turning full each way and approx-
imating center.
Set RI 5 full counterclockwise and R12
approximately 1/4 clockwise.
(2) Start engine. Refer to Operator and Or-
ganizational Maintenance Manual for operating in-
structions. If engine hunts, perform following
adjustments to stabilize operation
(a) If hunt is of high frequency and small
amplitude; adjust R12 clockwise and/or R16 counter-
clockwise.
(b) If hunt is of low frequency and long
amplitude; adjust Rl8 countercloclwise. If operation
does not stabilize, turn R16 clockwise. It maybe
necessary to adjust R12 counterclockwise in conjunction
with R18 and R16 adjustments to stabilize operation.
Change 5
7 -7
