TM9-4935-481-14-1
C4
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
286
MCP
SELECTOR C switch to H22.
301
OSC
A & B input coupling switches to AC.
287
CT
Adjust DISPLAY control until a reading = 1/4 to 3/4 of that
302
OSC
INT/EXT pushbutton to EXT.
recorded in step 282 appears.
303
OSC
Connect a BNC tee to the A INPUT.
288
CT
Adjust A19-R13 to 1/4 or 3/4 of the value recorded in step 282
304
OSC
Connect a cable from the BNC tee to J150
0.02 msec.
305
OSC
Connect a cable from the BNC tee to the MAIN TRIG EXT INPUT 1.
289
Repeat steps 234 through 288.
306
OSC
Connect a cable from 10275938-J70 to the B INPUT.U
290
MCP
DMM FUNCTION switch to VAC.
307
OSC
MAIN trigger input coupling switch to AC.
291
MCP
SELECTOR A switch to 1-24.
308
OSC
Adjust the TRIGGER LEVEL control until two lines with positive
292
DMM
Adjust 1A19-R15 so that the nominal of the fluctuations will be
slopes are crossing the middle line of the graticule.
3060 Vac. Fluctuations about the nominal shall be within
309
OSC
Adjust A19-R23 until the distance between the crossings is 1.10
0.010 Vac.
msec (5.5 large divisions).
310
MCP
Remove the OSC probe from 10275938-J70 and connect the DMM pos
1.75 Sin Amplitude (1143-1355)
probe to 10275938-J700
311
DMM
Adjust 1A19-R18 so that the nominal of the fluctuations will be
293
MCP
DMM INPUT switch to DMPM INPUT,
1.237 Vac. Fluctuations about the nominal shall be within
294
Connect DMM pos probe to adapter 10275938-J70.
+ 0.004 Vac.
295
MCP
SELECTOR A switch to 1-23.
NOTE
296
DMM
Adjust 1A19-R18 so that the nominal of the fluctuations will be
Remove DMM probe from 10275938-J70 and repeat
1.237 Vac. Fluctuations about the nominal shall be within
steps 306 through 311 until the desired results are obtained.
0.004 Vac.
297
Remove the DMM probe from adapter 10275938-J70.
312
ITP
INTERNAL TEST switch to 1.
1.10 Sec Sine Delay (1143-1355)
298
OSC
TIME/DIV switch to .2 MSEC.
313
OSC
TIME/DIV switch to .5 MSEC.
299
OSC
A & B input coupling switches to GND.
314
MCP
Remove the DMM probe from 10275938-J70 and connect the OSC probe
300
OSC
Adjust POSITION controls to center both sweeps.
to 10275938-J70.
3-69