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