TM9-4935-481-14-1
C3
Table 3-10. DMS-D Maintenance Calibration-Continued
Table 3-10. DMS-D Maintenance Calibration-Continued
STEP
UNIT
PROCEDURE CORRECTIVE ACTION
STEP
UNIT
PROCEDURE CORRECTIVE ACTION
315
OSC
Adjust A19-R21 until the distance between the crossings is 2.20
msec. (4.4 large divisions)
4.327 Cos Zero Crossing (1143-1355)
316
MCP
Remove the cables from adapter 10275938-J70 and the oscilloscope.
333
CT
FUNCTION switch to PERIOD A.
317
MCP
DMM INPUT switch to SEL A.
334
MCP
SELECTOR A switch to I22.
335
CT
A INPUT switch to pos.
1.75 Cos DC Offset
336
CT
Disconnect the cables from the A and B INPUTS.
318
MCP
DMM FUNCTION switch to VDC.
337
CT
Connect a BNC tee to the A INPUT.
319
MCP
SELECTOR B switch to H23.
338
CT
Connect a 10215396 cable to the BNC tee, the white probe to
320
ITP
INTERNAL TEST switch to 7.
A20-TP3 (RED) and the black probe to J33 (GND).
321
DMM
Divide the reading by 2.5 and record for use in step 324.
339
CT
Divide the reading by 2 and record for use in step 345.
322
MCP
DMM INPUT switch to DMM INPUT.
340
CT
A INPUT switch to neg.
323
MCP
Connect external DMM pos probe to adapter 10275938-J30.
341
CT
B INPUT switch to pos.
324
D1M
Adjust A19-R33 to the value recorded in step 321 0.0002 Vdc.
342
CT
FUNCTION switch to TIME A B.
Check A1S33-A8 and A19-R33.
343
CT
Adjust A & B SENSITIVITY controls fully cw.
1.75 Sin DC Offset
344
CT
Connect a cable from the BNC tee to the B INPUT.
325
MCP
SELECTOR B switch to H22.
345
CT
Adjust A20-R5 to the value recorded in step 33 0.01 msec.
9,
326
MCP
DM INPUT switch to SEL A.
346
Remove the probe from A20-TP3 (RED) and connect it to A20-TP5
327
DMM
Divide the reading by 2.5 and record for use in step 330.
(YEL).
328
MCP
DMM INPUT switch to DMM INPUT.
347
CT
FUNCTION switch to PERIOD A.
329
MCP
Connect DMM pos probe to adapter 10275938-J70.
348
CT
Adjust A & B SENSITIVITY controls to mid-range.
330
DMM
Adjust A19-R25 to the value recorded in step 327 0.0002 Vdc.
349
CT
Divide the reading by 2 and record for use in step 351.
Check A19-R25.
350
CT
FUNCTION switch to TIME A B.
331
ITP
INTERNAL TEST switch to OFF.
351
CT
Adjust A20-RlO to the value recorded in step 349 0.01 msec.
332
MCP
DMM INPUT switch to SEL A.
352
Disconnect the cables and BNC tee from the Counter and A20-TP5.
353
MCP
Reconnect the cable from J14 to the Counter A INPUT.
3-70
