TM 55-1510-220-10 NOTE When   the   MANUAL   SYSTEM   RESET switch is pressed and released, and 28 volts I)C power has been applied, the sequencer switch inside the dispenser assembly resets, making  an  audible  sound  as  it  rotates.    If the  sequencer  switch  has  been  previously reset or if the switch is in position 12 or 24, there will be no such sound. c. Rotate  TEST  SEQUENCE  switch  counterclockwise to   STRAY   VOLT   position.   STRAY   VOLTAGE lamp (red) should not illuminate. d. Rotate TEST SEQUENCE switch counter-clockwise to START/HOME position. NOTE When   the   TEST   SEQUENCE   switch   is turned  to  the  START/HOME  position,  the DISPENSER COMPLETE lamp will extinguish,  the  STRAY  VOLTAGE  lamp will   illuminate   and   then   will   extinguish when    passing    through    the    TS    RESET position. 15.   On CHAFF dispenser assembly, assure that C-F selector switch is in C (chaff) position. 16.   Remove M-91 test set from first dispenser assembly. 17.   Connect M-91 test set to breech assembly of second dispenser assembly.  Secure both mounting studs uniformly hand tight using ball hexagonal key screwdriver provided in test set carrying case. NOTE When    the    test    set    is    installed    on    the dispenser    assembly    and    28    volts    DC aircraft    power    has    been    applied,    the sequence     switch     inside     the     dispenser assembly  resets,  making  an  audible  sound as it rotates.  There will be no such sound if the  sequencer  switch  has  been  previously reset or if switch is in position 12 or 24. NOTE On   test   set,   TS   PWR   ON   lamp   (clear) illuminates and remains illuminated through   the   test   sequence   until   aircraft power  to  test  set  (via  test  set  power  cable) is disconnected or shut off. 18.   Perform the following operations on the M91 test set: a. Press  to  test  all  four  lamps  on  test  set.  Each  lamp will illuminate. NOTE Replace  any  lamp  that  does  not  illuminate when  pressed.    If  none  of  the  indicating lamps illuminate, return test set to AVUM. b. Rotate  TEST  SEQUENCE  switch  clockwise  to  TS RESET position.  No visual indication will occur. c. Rotate  TEST  SEQUENCE  switch  clockwise  to  SV SELF   TEST   position.   STRAY   VOLTAGE   lamp (red) will illuminate. d. Rotate  TEST  SEQUENCE  switch  clockwise  to  next position, TS RESET. STRAY VOLTAGE lamp (red) will extinguish. e. Rotate  TEST  SEQUENCE  switch  clockwise  to  next position,  STRAY  VOLT.  STRAY  VOLTAGE  lamp (red) should not illuminate. f. Rotate  TEST  SEQUENCE  switch  clockwise  to  next position, SYS NOT RESET. SYS NOT RESET lamp (amber) should not illuminate.  If lamp illuminates, press    and    release    MANUAL    SYSTEM    RESET switch   and   SYS   NOT   RESET   lamp   should   then extinguish. NOTE When   the   MANUAL   SYSTEM   RESET switch is pressed and released, and 28 volts DC power has been applied, the sequencer switch inside the dispenser assembly resets, making  an  audible  sound  as  it  rotates.    If the  sequencer  switch  has  been  previously reset or if the switch is in position 12 or 24, there will be no such sound. 4-7