Yorkville PowerMAX22-2 - Manuel (Page 14)

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32. Mon 1 and Mon 2 EQs
These are 9-band mono EQ’s with +/-12 dB on the same centers as the L/R Main EQ. They
are Inserted between the monitor busses and the # 3 & 4 power amps, also the Mon 1
and 2 Line Level Outputs.
These EQ’s should be set flat (all sliders at center) then adjusted for minimal moni-
tor feedback during a sound check. If feedback does set in during the job, you will be
tempted to blame the mains because that’s what you hear from the mixing station out
front. Don’t be misled. As a rule it’s one or more of the monitors, but of course the
noise comes out the mains too. Use your channel Mute buttons to mute each channel
briefly and see if the noise stops. You may also use the Clip LEDs to hunt for feed-
back channels. If the channel Gains are set high enough per instructions, feedback
channels will have increased Clip light activity. If only one or two channels are caus-
ing feedback, the best solution is to adjust the channel EQ or, better still, connect
monitor-feedback-prone microphoness to the channels with Overload Protection. If,
on the other hand, a larger percentage of the monitors are having feedback problems,
use one or both of the Monitor EQs to cut monitor level at the feedback frequencies.
33. VU-Meter, Solo Mode Button, AFL and PFL LEDs
The VU-Meter reflects either the post-EQ, post-Speaker
Processor main buss output levels, or the Solo buss levels.
Flashing of the yellow LEDs at +2 and +4 should coincide with
flashing of the Amp A and/or Amp B Amplifier Full-Power
LEDs. The red +7 and +10 LEDs indicate that the main mixing
buss is overloaded.
The Solo Mode button allows you to switch between AFL
and PFL. AFL mode allows you to view post fader levels in the
channels, effects to L&R in the Efx returns, and the Mon 1/
Mon 2 mix levels. PFL mode allows you to view pre-fader lev-
els in the channels (even muted channels), effects input in
the Efx returns, and the Mon 1/Mon 2 mix.
The AFL and PFL LEDs indicate which solo mode is cur-
rently in effect.
To view the main system levels, release all the Solo but-
tons so that neither the PFL nor the AFL LED flashes.
To check Solo levels, press for PFL. Occasional peaks
between +7 and +10 will not reflect actual clipping, how-
ever if such peaking becomes continuous, reduce either
the channel fader levels if you are in AFL mode (or the
input level of the Solo source if you are in PFL). – Look
for the illuminated Solo LED and turn that master down.
+10
+7
+4
+2
0
-2
-4
-7
-10
-20
-30
-38
Solo Mode
PFL
PFL
Channel
Set
AFL
Phones
V U M e t e r
0
5
2 8
7
6 4
3
9 1
10