C3
TM 9-4935-481-14-1
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
TRIG OUTPUT switch to MNL.
TPS
253
270
PPE
SEQUENCE switch to MNL.
Remove the probe from 1A7A1-J3 and connect it to 1A7A2-J8.
TTS
254
271
MCP
SELECTOR A switch to F23.
Connect a jumper wire from 1A7A2-J12 to 1A7A1-J11.
TTS
255
272
MCP
SELECTOR B switch to B3.
Momentarily actuate TEST START switch (power on).
PPE
256
273
MCP
DMM FUNCTION switch to VAC.
Observe a HI display.
OSC
257
274
MCP
Disconnect the 1W14 cable from J17.
Adjust 1A7A2-R16 fully cw.
TTS
258
275
MCP
DMM LO switch to EXT.
Repeatedly actuate the TRIGGER switch and adjust 1A7A2-R16 ccw until neg. pulses observed.
OSC
259
276
TTS
Remove the thermistor cable probe from the TTS thermistor bracket and mount it on the rear of
TPS
the OAC under a mounting bolt (see fig. 3-36.2).
Momentarily actuate TEST START switch (power off).
PPE
260
277
MCP
Connect the thermistor cable to J17.
Remove the wire from 1A7A2-J12 and 1A7A1-Jll.
261
278
TTS
Momentarily actuate TEST START/STOP pushbutton (power on).
Remove the probe from 1A7A2-J8.
262
279
CIP
Observe INHIB lamp illuminated.
Infrared Source Stimulus Levels 11A81 (Part A)_
280
MCP
DMM FUNCTION switch to K OHMS.
PP
263
DMS switch to OFF.
281
MCP
DMM INPUT switch to DM1M INPUT.
MCP
264
282
DDM
After DMM stabilizes observe and record the DM1M reading.
Disconnect 1W2-P2 from J7.
MCP
265
283
MCP
DMM FUNCTION switch to VAC.
Connect 1W1-P3 to J7.
PP
266
284
MCP
DMM INPUT switch to SEL. A.
DMS switch to ON. Momentarily actuate TEST START switch.
TP
285
MCP
DMM LO switch to SEL. B.
CAUTION
286
Convert the resistance reading taken in step 282 to a temperature reading using the chart in
Do not actuate DMS-D PPE TEST START switch while TTS POWER switch is ON.
TTS
267
POWER switch to ON.
287
Using the IR source control voltage vs temperature curve, figure 3-36.5, determine control
voltage for the temperature recorded in step 286.
TTS
268
MODE switch to BORESIGHT.
TTS
Adjust 1A8A1-R8 to the value recorded in step 286 0.002 Vac.
288
TPS
269
DMM
TRIG OUTPUT switch to OFF.
3-214