Alto Dragonfly PM-12 Service Manual page 66

(8) Connect unbalanced 15dBu input to LINE IN 1-8, press MAIN L-R button, and measure the
unbalanced output of MAIN MIX OUTPUT while PAN set both in left and right, it is -6dBu(+/-2dBu)
THD+N<0.10%.
(9) Set AUX1 and AUX2 of DFX (INT) RETURN EFFECTS TO MONITOR in minimum, measure the
output of AUX SENDS1~4 and it is 0dBu (+/-2dBu) THD+N<0.10% (this output can be influenced by
the channel LEVEL). If you press the PRST/PRE down, the outputs of AUX SENDS 1-2 will not be
influenced by the respective channel LEVEL.
(10) Turn AUX1 and AUX2 of DFX (INT) EFFECTS TO MONITOR, verify that the output curve of AUX
SENDS1 & 2 change relatively.
(11) Keep all keys OFF, press SOLO button of respective AUX SEND 1-4, the output of CTRL ROOM
OUTPUT and PHONES are 0dBu (+/-2dBu) THD+N<0.030%
(12) Connect unbalanced 0db input to STEREO AUX RETURN L-R 1-4 independently, measure the
balanced output (LEFT & RIGHT) and it shall 0dBu (+/-2dBu) THD+N<0.10%. Press AUX RETURN
SOLO, the right indicator of AUX RETURN is lit, measure the output of CTRL ROOM OUTPUT and
PHONES and it shall be 0dBu (+/-2dBu) THD+N<0.030%.
(13) Connect unbalanced input to STEREO AUX RETURN L-R 1, adjust the right knob of AUX SENDS
1 of STEREO AUX RETURN and measure the MAIN MIX OUTPUT. Then, adjust the right knob of
AUX SENDS 1 of STEREO AUX RETURN and measure the AUX SENDS 1.
(14) Connect unbalanced input to STERET AUX RETURN L-R 2, adjust the right knob of AUX SENDS
2 of STEREO AUX RETURN and measure the MAIN MIX OUTPUT. Then, adjust the right knob of
AUX SENDS 2 of STEREO AUX RETURN and measure the AUX SENDS 1.
(15) Connect unbalanced 0db input to STEREO AUX RETURN L-R 3, press MAIN MIX/CTRL/R button
and measure the output of CTRL ROOM OUTPUT and PHONES, it shall be 0dBu (+/-2dBu) , and
there shall be no output on MAIN MIX OUT.
(16) Connect unbalanced 0dB input to STEREO AUX RETURN4-L and STEREO AUX RETURN4-R,
the MAIN MIX LEFT&RIGHT OUTPUTS are 0dBu (+/-2dBu) THD+N<0.10%. Set SUB GROUP fader
at "0", and press SUB1/2, SUB3/4, SUB GROUPOUT1/2 and SUB GROUPOUT3/4 independently,
the output is 0dBu (+/-2dBu) THD+N<0.10%.
(17) Connect unbalanced input to MIC1 and all knobs are set in original position.
A. Press MAIN L-R and MAIN MIX of CTRL ROOM SOURCE, now the outputs of CTRL ROOM
OUTPUT and the output will change accordingly. Release all keys (OFF) at last.
B. Press the SOLO on other channels independently, its indicator lit in yellow and the indicator
over LEVEL SET will light. Now, the CTRL ROOM and PHONES output shall be 0dBu (+/-2dBu)
THD+N<0.10%. press SOLO MODE and the SOLO ACTIVE will light up, the CTRL ROOM
OUTPUT is influenced by respective channel LEVEL. Release the SOLO MODE and it's output
will not be influenced by its channel LEVEL.
C. Release all keys (OFF), press the SUB1/2 and SUB 3/4 on respective channel, and press
SUB1-2 and SUB3-4 of CTRL ROOM SOURCE simultaneously. The CTRL ROOM output is -
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