Alto EQU231VU-MKII V2, Service Manual

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EQU 231 VU-MKII V2 Finished Product Test
Test Instruments
1. AP (Audio Precision)
2. Dual-track oscilloscope
Instrument setting
1. Set proper AC input voltage
2. Connect the output signal of AP to the input of EQU231VU-MKII V2
3. Connect the output of EQU231VU-MKII V2 to the input of AP
Adjustment according to following procedures
1. Set the potentiometer of 31-band EQ in center, set the input level at 0dB, all buttons out
2. Turn input level to maximum, the output level +12dB+/-1dB, and the distortion shall be
0.003%+/-0.001%
3. Set INPUT LEVEL at minimum, the output level shall be -12dB+/-1dB, and distortion shall be
0.006%+/-0.001%
7. Test Procedure
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