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Alto EQU231VU-MKII Service Manual
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Alto EQU231VU-MKII Service Manual

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Summary of Contents for Alto EQU231VU-MKII

  • Page 2 " # $ # $ % &&&&&&&&&&&&&&&&&&&&&& &&&&&& & &&&&&&&&&&&&&&&&&&&&&&&&&&&&& &&&&& &&&&&&&& &&& & &&&&&&& & + &&&&&& &&&&& &&& && &&&&&&& && &- . / " ' && &&&&&& &&&&& &&& && &&&&&&& &&& ! &&&& &&&&&&&&& &&&&&&&&&& && & + &&&&&&&&&&&...
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  • Page 9 6 " %...
  • Page 10 . / " ' / " ' / " ' / " ' / " '...
  • Page 11 / " ' / " ' / " ' PCB: EQU31PU-II Bottom Overlay...
  • Page 12 PCB: EQU31PU-II Top Layer PCB: EQU31PU-II Top Overlay / " '...
  • Page 13 / " ' / " '...
  • Page 14 # 0 1# & & + , / * . / 4 " 55 + , / * . / 4 " 55 6 7 - 6 7 - : 6 < 8 # 7 - + , ( * 8 )( ) ;...
  • Page 15 4. Adjust the input level so that the AP output is 0dB, the frequency response is as following. < = **" < ) r *- 8 / 5. Adjust the input level so that the AP output is 0dB, press the Hi-pass button and the frequency response is as following.
  • Page 16 6. Adjust the input level so that the AP output is 0dB, press the Low Pass button and the frequency response is as following. 7. Press EQ button down, keep RANGE out and the LED indicates +12, adjust all slide buttons to maximum and minimum, measure the frequency response independently and the curve shall be as following.
  • Page 17 8. Turn off the AP input signal and set input level at maximum, the AP setting is as following, now, it shall be no more than –82dB. 9. Turn on the AP input signal, and set the input level at maximum, the AP setting is as following, the maximum non-distortion level is +28dBu/+/-1dB and distortion is 1%.
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