The meter will do the job, though you cannot accurately measure the capsule voltage like Arjay1949 already said. Capsule voltage will indeed be 73V, not 100V or more like I first said. That was based on my false assumption that it would have the same circuit as the NT5 that I have, which has something like 107V when measured with a 1GOhm meter. We could assume your meter is 10MOhm and? and make estimations of voltages to expect on certain nodes in the circuit.
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I'd first make sure the CMOS oscillator gets powered. Connect the DMM ground lead to the NT1-A chassis. Press the red probe on the gold-plated test pad next to the IC, marked with a red circle in attached picture and turn phantom power on. With the body open, it will pick up a lot of hum. Do not output the signal of the preamp to an amp and speakers. You should measure approximately 15V. Then measure on the other test pad, marked with a green circle. Here, you should measure something like 60 to 73V, depending on your DMM input impedance.
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Jan
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