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MKH 20...70
10/53
04/2005
Circuit test MKH60/MKH70:
쐃
Operating voltage microphone:
Check voltages between R20 or R21 and ground; desired value = +41V;
both voltages have to be identical.
If the no-load voltage of the phantom supply device is not 48V, the deviation
from the desired value has to be identical.
쐇
Current consumption microphone:
Check voltages via R18 and R19; desired value in each case = 2.2V
(corresponds to 1mA in each case);
both voltages have to be identical.
쐋
Balancing:
Check the voltage between the measuring points A(+) and B(-);
desired value = 0V
If the value is not 0V, rotate the coil core of L1 until the voltage is 0V.
쐏
Operating voltage output stage:
Check voltage via D4; desired value = 4.5V
Check voltage via D5; desired value = 4.5V
쐄
Operating voltage oscillator:
Check voltage via C10; desired value = +30.5V
Summary of Contents for MKH 20
Page 16: ...MKH 20 P 48 16 53 04 2005 MKH 20 circuit diagram ...
Page 22: ...MKH 30 P 48 22 53 04 2005 MKH 30 circuit diagram ...
Page 28: ...MKH 40 P 48 28 53 04 2005 MKH 40 circuit diagram ...
Page 31: ...MKH 50 P 48 04 2005 31 53 Frequency response Equalization Polar diagram ...
Page 34: ...MKH 50 P 48 34 53 04 2005 MKH 50 circuit diagram ...
Page 37: ...MKH 60 1 P 48 04 2005 37 53 Frequency response Equalization Polar diagram ...
Page 41: ...MKH 60 1 P 48 04 2005 41 53 MKH 60 circuit diagram ...
Page 44: ...MKH 60 1 P 48 44 53 04 2005 ...
Page 47: ...MKH 70 1 P 48 04 2005 47 53 Frequency response Equalization Polar diagram ...