ARMY TM 9-6115-464-34
AIR FORCE TO 35C2-3-445-2
NAVY NAVFAC P-8-624-34
Repair wiring harness as follows: If the wiring harness has sustained damage and requires repair or
rebuild, refer to figures 3-69 (50/60 Hz) or 370 (400 Hz) as required for layout identification and
material requirements and Appendix A for detailed soldering and replacement procedures.
Test and replace printed circuit board components using figures 3-71, 372, 3-73,3-74, and 3-75
If any soldered component on the printed circuit board must be replaced, refer to Appendix A for
detailed soldering and replacement procedures.
(1) Assemble governor control unit in reverse order of removal procedures using figure 3-68 as a guide.
Prior to installing assembled governor control unit in housing and pouring potting
compound, perform tests (subparagraph g.) below.
(2) After completing assembly, repeat tests g.(2), (3), (4) (checks only) (5) and (6).
(3) After final assembly, use an ohmmeter to check for open circuit between each pin on all connectors
and each test point and the governor control unit housing. There shall be no sign of continuity.
Unpotted governor control unit printed circuit board must be positioned as specified in
step (1) below. Failure to observe this caution could result in damage to the
(1) Position governor control unit printed circuit board as shown in figure 3-76.
(2) Perform resistance test as follows:
(a) Turn potentiometers (R11, R12, R14, R15, R16 and R18, figure 3-68) to the full clockwise position.
(b) Preset adjustable resistors (R2 and R10, figure 3-71) to mid-range.
(c) Using an ohmmeter, check resistance of points in table 3-5 for specified values (400 Hz resistance
test values are given in table 3-6).
Observe polarity of connections specified in the table. Return potentiometer to
clockwise position after each check.
(3) Perform magnetic amplifier bias test as follows:
Install governor control unit in test circuit illustrated
in figure 3-77.
Frequency of power source (G1) must conform to frequency of governor control unit
being tested (50/60 Hz or 400 Hz).
Turn potentiometers R11, R12, R14, R15, R16, and R18 to full clockwise position.
Adjust R11 and R12 to obtain a balanced reading of 450 milliamperes on M2 and M3.
Turn R12 to full clockwise. Reading of M2 and M3 shall be O to 300 milliamperes and shall be
balanced within 50 milliamperes.