TM 9-4935-481-14-1
C3
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
253
MCP
Connect a cable from 10275938-J30 to the oscilloscope B INPUT,
268
MCP
SELECTOR C switch to H22.
254
OSC
AUTO/NORM pushbutton to NORM.
269
DMM
Adjust 1A19-R15 so that the nominal of the fluctuations will be
255
OSC
Adjust the TRIGGER LEVEL control until the two lines with
3.060 Vac. Fluctuations about the nominal shall be within
positive slopes are crossing the middle line of the grat-
0.010 Vac.
icule. The distance between the two crossings represents the
270
MCP
Disconnect the cable from J15 and reconnect between J16 and the
time delay between the two sinusoidal inputs.
counter B INPUT.
256
OSC
Adjust A19-R32 until the distance between the crossing is 1.10
Quadrature(1143-161)
msec (5.5 large division).
271
MCP
DMM FUNCTION switch to VDC,
257
Repeat steps 234 through 256 until voltages stabilize and no
272
MCP
SELECTOR A switch to F1.
further adjustments are necessary.
273
MCP
2.2 Sec Cos Time Delay (1237-1264)
274
MCP
Adjust COMPARATOR THRESHOLD B control to +0.1000 0.0020 Vdc.
258
ITP
INTERNAL TEST switch to 1.
275
MCP
SELECTOR A switch to I-22.
259
OSC
TIME/DIV switch to .5 MSEC.
276
MCP
SELECTOR B switch to H23.
260
OSC
Repeat step 255.
277
CT
FUNCTION switch to PERIOD A.
261
OSC
Adjust A19-R29 until the distance between the crossings is 2.20
273
CT
A INPUT switch to neg.
msec (4.4 large divisions),
279
CT
B INPUT switch to neg.
1
262
OSC
Remove OSC probe from adapter 10275938-J30 and connect the
280
CT
FREQ/TIME/MULT switch to 10
.
DMM pos probe to 10275938-J30.
281
MCP
SELECTOR C switch to I-22.
263
DMM
Observe a reading of 1.229 to 1.245 Vac.
282
CT
Observe a reading of 49.94 to 50.06 msec and record for use in
264
Repeat steps 234 through 263.
steps 287 and 288,
265
ITP
INTERNAL TEST switch to OFF.
283
MCP
SELECTOR A switch to F2.
266
MCP
DMM INPUT switch to SEL A.
284
MCP
Adjust COMPAR4TOR THRESHOLD C control to +0.1000 + 0.002 Vdc.
4.327 Sin Amplitude(1143-1236)
DMM
267
MCP
SELECTOR A switch to 1-24.
285
CT
FUNCTION switch to TIME A B.
3-68