DRAKE SRR60 Betriebsanleitung PDF herunterladen (Seite 17)

Troubleshooting Guide 17

PROBLEM

Receiver won’t turn on.

No signal reception. Channel A

and/or B signal indicator LED

on receiver not lit.

Weak or no speaker output.

Dead spots in classroom.

Acoustic feedback (howling or

screeching).

CAUSE

Power cord not plugged in.

Fuse blown

BP60 Belt Pack and/or HHM60

Microphones not turned on.

BP60 Belt Pack and/or HHM60

batteries are discharged.

IR transmitters on Lavaliere and/or

HHM60 microphone are covered.

Master Volume control set too low.

Channel A or Channel B Volume

set too low.

Channel A or Channel B equalizers

set too low.

BP60 Belt Pack gain adjustment

set too low.

One or more speakers out of phase

with the others.

One or more speaker output level

controls are set incorrectly.

Channel A or B VOLUME set too

high.

Microphone is too close to a

speaker.

Equalizer improperly adjusted.

CURE

Plug in power cord.

Replace with 1.6 250V Amp Slo-Blo.

Turn on BP60 and/or HHM60 micro-

phone.

Is Power light on microphones lit when

turned on? If not, recharge batteries.

Make sure IR transmitters on Lavaliere

and HHM60 are unobstructed.

Increase setting of Master Volume.

Increase setting of low channel Volume

control.

Increase equalizer L, M & H settings

toward +10 for natural sounding audio.

Advance setting of BP60 gain adjust-

ment (See Page 10, item 10).

Check speaker wiring. All speakers

must be wired with the same polarity.

Correct any discrepancies (see page 9,

item 3).

Determine which speaker is producing

low output and adjust the corresponding

rear panel level control (see page 9 item

4).

Reduce the Channel A or B VOLUME

and move microphone closer to mouth.

Move microphone further away from a

speaker. Avoid mounting speakers in

the instructors primary area.

Depending on the audio frequency of

the feedback, adjusting the “H” slider on

the equalizer for the offending micro-

phone may help.

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