Classe Audio CP-65, Руководство по обслуживанию

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5. Noise Test
1) connect balanced outputs to a power amplifier. Select
line. Turn the volume up and down manually and
listen for the noise and hum with speaker. Do the
same thing in balance, Tape1 and 2
2) repeat step 1 with single ended outputs
3) repeat steps 1 and 2 with remote control
6. Paper Works
1) turn volume up to 15. measure and record the
offset voltages.
2) Measure and record bias voltages
3) Measure and record the difference in right and left
channels. (in dB)
4) Measure and record the gain (in dB)
7. Audio- Precision Test
1) set-up unit to the computer. Volume must be 30
2) load frequency response test and sweep
3) load THD plus N- Freq. Response test
4) and B must be 0.003%
5) measure noise in dB
8. 1) check the RS232 port
2) reset the unit
3) mark F.T.