TM 55-1510-221-10
illuminates, press and release MAN-
UAL SYSTEM RESET switch and SYS
NOT RESET lamp should then extin-
guish.
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.
g.
Rotate TEST SEQUENCE switch
clockwise to next position,
DISP
COMP.
12. Press FLARE DISP switch once. For each
depressing, the FLARE counter on DCP
should count down in groups of three.
13.
On DCP, raise RIPPLE FIRE switch guard
and set toggle switch to up position until
FLARE counter counts down to 00. Return
switch guard to down position. On DCP,
reset FLARE counter back to 30. DIS-
PENSER COMPLETE lamp (green) on test
set will illuminate.
14. Perform the following operations on the
M-91 test set:
a.
Rotate TEST SEQUENCE switch
counter-clockwise to SYS NOT RESET
position. SYS NOT RESET lamp
(amber) will illuminate. DISPENSER
COMPLETE lamp (green) will remain
illuminated.
b. Press and release MANUAL SYSTEM
RESET switch. SYS NOT RESET lamp
(amber) will 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.
c.
Rotate TEST SEQUENCE switch
counterclockwise to STRAY VOLT
position. STRAY VOLTAGE lamp
(red) should not illuminate.
d. Rotate TEST SEQUENCE switch
counterclockwise 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 dis-
penser 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
M-91 test set:
a.
Press to test all four lamps on test set.
Each lamp will illuminate.
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