Page 5
FAULT
PROBLEM SOLUTIONS
No sound
(power
LED off)
AC supply not connected or
switched off
Blown fuse
Check AC connections and switches
Check and replace fuses at plug and IEC
socket. USE ONLY SAME TYPE AND RATING!
NO sound
(Power
LED on)
No input,
or input too low
Level controls set too low
Speakers faulty or
not connected
Check input is connected, and LED
Increase level controls
Check speakers and speaker connections
Hum or
buzz is
audible
Noise from AC supply is being
picked up in the signal path
There is an earth problem
Use good quality, shielded signal cables and
ensure they are kept away from AC power cables
and other AC powered equipment
Use a mains tester to ensure the AC outlet
has a good earth. Power connected equipment(e.g mixer
and amp) from the same AC outlet where possible.
Distortion
is audible
Excessive signal level
somewhere in signal chain.
Damaged or poor quality
cables
Sound cuts
out or is I
ntermittent
Damaged or poor quality
cables or connectors,
connectors not properly
inserted, amp overheating
Use only high quality cables of the appropriate type,
protect them from damage and regularly
check connections.
Use the LED to ensure the AC outlet has a good earth.
Power connected equipment from the same AC outlet
where possible
Check all cables and connections, refer to above
sections regarding distortion and temp warning light
Ensure that the AC power supply is correct for your amplifier. The required AC supply
is stated on the rear panel next to the AC power input.
Ensure that you use the correct type of mains lead for your equipment and country.
This must be free from damage and easily accessible during use.
PROFESSIONAL POWER AMPLIFIER
Service
All Audio Design Pro products are thoroughly examined and tested before
leaving the factory, and if used correctly will give you many years of excellent
service. However, if a problem arises, proceed as follows:
(A) contact the retailer from whom the unit was purchased and describe the
symptoms of the fault
(B) if the retailer cannot help, return the equipment to the national distributor
for your country. Use the original packaging to protect the product from damage.
Include a note with the equipment stating your name and address, details of the
problems, date code and date and place of purchase.
SERIES
PAMP1.
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