TM9-4935-481-14-1
Table 3-19. LET Performance Test
Table 3-19. LET Performance Test-Continued
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
NOTE
7
MCP
Connect 1W3-P2 to J8.
The major units and panels will be identified
8
Connect 1W3-Pl to 1W12-P2.
as indicated below.
9
MCP
SELECTOR A switch to D24.
10
MCP
SELECTOR B switch to D24.
DMS-D
11
MCP
SELECTOR C switch to D24.
DMM
DIGITAL MULTIMETER
12
TPS
TRIG OUTPUT switch to MNL.
CT
COUNTER-TIMER
13
TPS
AMPTD(VOLTS) dial to 200.
PP
POWER panel
14
TPS
WIDTH(MS) dial to 10.0.
MCP
MONITOR/CONTROL panel
15
PPE
FUNCTION TEST switch to INT-CLK.
PPE
PROG PERFORM EVAL panel
TPS
TRIGGER PULSE SIM panel
CAUTION
LET
LAUNCH EFFECTS TRAINER
Do not short test jacks on 10215396 cable to ground,
OSC
OSCILLOSCOPE (AN/USM-338)
to other voltages, or to themselves as damage will
result to the DMS-D trigger generator circuits.
1
Prepare the DMS-D for testing per paragraph 2-6.
2
LET
Remove battery compartment access cover and verify batteries are
16
PP
MAIN POWER and DMS switches to ON.
installed.
17
MCP
Connect a 10215396 cable to J15, the white probe to 1W4-J4, and
3
LET
Connect adapter 1W4 to the tracker saddle.
the black probe to 1W4-J3.
18
MCP
Disconnect the cable between J14 and the counter A INPUT.
19
CT
Connect a BNC tee to the A INPUT.
NOTE
20
MCP
Disconnect the end of the cable connected to J16, and reconnect
1W4-Pl is not connected during this procedure.
it to the BNC tee.
21
OSC
Connect a BNC tee to the CHANNEL A INPUT.
4
LET
Remove both forward and aft end caps.
22
CT
Connect a cable between the two BNC tees.
5
LET
Remove the solenoid shield. (Refer to TM 9-6920-480-34.)
OSC
6
LET
Connect 1W12-Pl to J1.
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