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[TITLE]
MARCH 9, 2000
[PART NUMBER]
Audioaccess Trouble Shooting
Page 4
AUDIO RELATED
Problem Encountered
Find the problem component
solution
No Audio in one zone
Identify Zone.
Check Speaker continuity.
Check Preamp output.
Check amp outputs. – What type of
Amp is powering this zone? Is it
signal sensing turn on/off?
Check Fuse
Source dependent? - Check source
input continuity and line level signal.
Turn all zones off but the problem zone.
Use program screen in Zone or Room
mode to identify active zone.
PX-612 – min. 4 ohms load, PX-603
min. 8 ohm load. MRX – min. 4 ohm
load. Do not fall below rated impedance
for amplifiers.
Is there preamp line level signal. If so,
check amp channel.
Feed a direct signal into the amp – If it
does not power up look to the amp for
the problem.
Replace fuse with same value.
Change source or it’s wiring connection.
No Audio in any zone
Amplifier ON?
Is the amp plugged into a switched
outlet that is not on?
Check main power fuse in Amp and
Preamp.
Insure AC power to Amp. Is not
switched unless system is designed to
use installed amp in this fashion.
Replace fuse with same value.
Audio always very loud in
all zones. Sources can be
controlled but volume can
not.
Check PX-600 back panel outputs.
Variable audio comes out of the preamp
section and NOT the zone outputs.
Use preamp output not zone outputs.
Audio drops out then
returns
What volume level does this occur?
Does this happen when music has
soft passages in it?
Does it always happen at the same
volume level?
Is it source dependent?
With PX-612 check by slowly adjusting
the volume level to a softer point. Use
the Zone button on PX-600 programmer
to see what the actual level is. If the
threshold is below “10” the amp needs
to be modified.
Check sources output for drop out.
Repair or replace source.
Cross talk between inputs
and zones.
Is the Audioaccess system used in
conjunction with a local system? –
IE: source sharing.
Some MRX units inherently have this
problem. How to minimize.
Disconnect the local system – if the
problem is not present use a ground
loop isolator in line with the local system
feed.
Install an SMM (Speaker Mute Module).
In MRX, zones 1&4, 2&3, 5&6 are
grounded together. If these pairs are the
frequently used zones, reallocate
combinations so that frequently used
zones are not the pairs described.
Hum in speakers
Is there a cable system integrated
Remove the cable connection. If the
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