TM 10-7310-241-12&P
Change 1 4-22.3
4-16.1. REPLACMENT OF THE CONTROL PANEL ASSEMBLY FOR MODEL 471012 (Continued)
(1) Place the switch (1) in position 0 and measure the resistance between pins 1 and 2, between
pins 1 and 3 and between pins 2 and 3. In every case, an open circuit should exist between the pins.
(2) Place the switch (1) in position I and measure the resistance between each set of pins. In this
case, a short circuit should exist between pins 1 and 2. An open circuit should exist between pins 1
and 3 and between pins 2 and 3.
(3) Place the switch (1) in position II and measure the resistance between each set of pins. In this case, a
short circuit should exist between pins 2 and 3. An open circuit should exist between pins 1 and
3 and between pins 1 and 2.
(4) If the switch (1) passes all of the above tests, it is operating correctly. Resolder the three wires to the
switch, as discussed in Repairing the Switch (Subparagraph 4-16.1d, steps (1) thru (3)).
(5) If the switch fails any of the above tests, replace the switch (Subparagraph 4-16.1e, steps (1) thru (6)).
d. Repairing the Switch.
NOTE
The wiring connections should be pin 1 violet, pin 2 orange, pin 3
yellow.
(1) If the three wires (1) between the switch and the circuit board (2) are not correctly
connected or securely attached, then solder the wires securely to their correct locations, and
touch up soldered connections, on both sides of the circuit board, with conformal coating.
(2) Verify that the HWR is now operating correctly.
(3) If not, unsolder the wires connected to pins 1, 2 and 3 of the switch, noting the color coding of wires.
1
2
