14
In Case of Trouble
If you suspect a problem with your Z-12, first turn the amp off and check all your connections.
Another component or even a defective hookup cable may cause the trouble. If you hear hum,
turn off the amplifier and disconnect the inputs to it. If the hum is gone when you turn the
amplifier back on, it was probably caused by your preamplifier, system controller, or one of
the source components connected to it.
Also, make sure that the AC cords of all components are connected to the same AC outlet.
In rack mounted systems, ground loops and hum will often develop via ground loops caused
by redundant grounding of the metal rack rails of the equipment rack. This problem is usually
solved with nylon insulating shoulder washers (refer to the Rack Mounting section in this
owner’s manual).
If All Else Fails
Call your Parasound dealer or Parasound Technical Service Department. We can usually
suggest other diagnostic tests you can easily perform. If we determine that your Z-12 should
be returned to Parasound or an Authorized Parasound Warranty Center for inspection and
possible servicing, call Parasound for the location of a warranty center near you or shipping
instructions for return to Parasound.
Returning your Z-12 to Parasound for Service
If we determine that you should send your Zonemaster Z-12 to Parasound, you will need to
obtain a Return Authorization (RA) number. The RA number must be clearly marked on the
outer carton only. Ship the unit with adequate insurance and a copy of your purchase receipt
inside to validate your warranty. You must provide an original purchase receipt from an
Authorized Parasound Dealer for warranty repair. Units purchased from unauthorized dealers
are not eligible for warranty repair.
Units that arrive without an RA number, without a suitable shipping carton or with evidence
of improper internal packing materials may be refused. We do not accept collect shipments.
After repair under warranty, the unit will be returned to you via prepaid UPS within the
Continental United States.
In the case of a non-warranty repair, contact us and we will advise you of the repair charges
before you ship the unit to us. The same packing and Return Authorization number
requirements apply.
Important Notice before Shipping your Z-12
Before you ship the unit to Parasound, you MUST repack the unit into its fitted foam insert
sandwich and its original carton. Use of any other carton and packing materials will probably
result in shipping damage. Common carriers such as UPS will not pay claims for damage
incurred during shipment when products are surrounded only with styrofoam “peanuts” or
placed in non-original factory cartons.
Repairs for shipping damages because of mis-packing are your sole responsibility. If you do
not have the original packing cartons and foam inserts, call us for new packing material that
we can provide to you at a nominal charge.
