Troubleshooting Guide—Page 10
3.4) MP3 Player Faults.
Problem
Test / Likely Cause
Suggested Action
3.5) PA System Faults.
Problem
Test / Likely Cause
Suggested Action
Wrong sound plays, i.e. bell rings
when music should, etc.
No tones at all.
One sound not working, others OK
Operating system fragged due to surge or
brief power interruption
Wrong files in relevant folders on SD card
Operating system fragged
SD Card damaged
Missing or corrupt file in relevant directory
Broken wire on back of unit
Wrong file type (eg .WMA, not .MP3)
Switch off MP3 unit for 10 seconds, then back on and then
try again.
Reload SD card with correct files
Switch off unit for 10 seconds, then back on, and then try
again. Test ALL tones (Bell, Music, Evac, Alert, Wet
Weather, Mic splash tone) to make sure ALL are working
correctly after reset.
When system is switched back on, all ten red LED’s should
briefly light up and then go out as the system resets. If this
does not happen then replace the SD card.
Reload card with correct files
Call service or repair wires.
Unit will only play MP3 format files and not WMA (Windows
Media) files or MP4 (Apple Mac / I tunes) files. Make sure
all files are encoded in .MP3 format.
No Bells either auto or manual.
No tones.
No sound at all.
Volume Level very soft in some parts
of school but not others.
Strange noises through PA
Parts of school PA too LOUD and
others too soft
Fault in MP3 player.
Check Microphone still Works -
Amplifier switched off
Speaker selector not set correctly
Volume levels not set correctly
Faulty Amplifier
Short circuit in speaker line
Open spare input channel.
Radio Microphone Faulty (if fitted).
Faulty Tone Generator (on systems which do
not have an MP3 player).
Unauthorised contractor has replaced a
speaker with the wrong type (8 ohm) or
extended the system using the wrong type of
speaker.
Speaker taps not correctly set when system
was installed or system incorrectly specified.
If microphone still works OK - then refer above.
If not then refer “No Sound at all” below.
Switch ON power.
Push in “ALL” switch and leave ON.
Adjust all level knobs back to white arrow positions.
Call service. Be sure to mention that you think the amplifier
is faulty and a standby replacement may be needed.
Switch OFF “ALL” switch on speaker selector.
Progressively test each sector (one by one) to see which
ones still work OK and which one has the problem.
When found, leave affected sector OFF, switch all others
back ON and then call for service.
Make sure unused channels are turned right down to
ZERO. This is normally knobs 3,4,5 and 6 on the amplifier.
Switch off radio microphone receiver and see if noise goes
away.
Switch OFF entire system, wait for 10 seconds and switch
back ON. Also switch off UPS (if fitted) using button on
front of panel. If fault persists call service.
Have the work reversed and repaired accordingly either by
the original contractor, or call service.
Call service / warranty repair
SERVICE CONTACT :
PA Matthews Audio
(02) 4576 5571