b. General test procedures. You must determine the type of tests and
the location of the test points to identify the actual bad item of
equipment. Troubleshooting techniques for this type of defect are voltage
measurements
followed by continuity measurements (Figure 54).
c. Test procedure 32. The first voltage test point (TP1 of Figure 54)
is between pins A(-) and C(+) on the MT-1898 J14. Remove the R-442 from the
MT-1898 and measure the voltage between pins A and C.
If 22-30 volts DC is measured, the R-442 is bad.
Send to IDS for
repair.
If no voltage is measured, the next test point is TP2.
d. Test procedure 33. Measure voltage at TP2 pins A(-) and C(+) on CX-
4721. Disassemble the MT-1898 and remove the CX-4721 from the MT-1898 J11.
If 22-30 volts DC is measured, the MT-1898 mount is bad.
Repair
it if possible, if not send to IDS for repair.
If no voltage is measured at TP2, measure continuity of the CX-
4721, pin C on one end to pin C of the other end of the cable
(TP3).
Turn the A-RT to OFF, remove the A-RT from the MT-1029, and
disassemble the MT-1029 to get to the CX-4721.
Remove the CX-4721 from the MT-1029 J23.
Then measure continuity of the CX-4721 (as above).
If the meter indicates infinite ohms, the CX-4721 cable is bad
and will be repaired or replaced.
If the meter indicates zero ohms the CX-4721 is good and the MT-
1029 is bad.
Repair it if possible, if not send to IDS for
repair.
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