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In Case of Difficulty
If you’re having trouble or suspect a problem with the PX850 /PX1450, try some simple
troubleshooting before contacting an Authorized Carver Professional Dealer, Authorized Carver
Professional Service Center, or Carver Professional Technical Service.
No Sound, No Power
This is usually an indication of a power supply problem, either the power line itself or the amplifier’s
power supply.
1.PX amplifier power is switched off.
2.Line cord is disconnected.
3.Poor fit between the plug and AC receptacle.
4.Power off at AC receptacle (check with tester or lamp).
5.The amplifier is plugged into a switched outlet. Verify that the outlet is live.
6.PX amplifier fuse has blown. Check and replace fuse.
7.The thermal breaker in the power transformer has opened. Allow amplifier to cool & the breaker will reset itself
Power On, Low Output or No Output
Low or no output problems are usually signal-source, bad cable or partial output short circuit related.
1.The Input Level controls are set too low.
2.Move the input connections to another amplifier that you know is working to verify that it is not a
source problem.
3.Check the speaker connections. Be sure that there are no small strands of wire touching similar strands
coming from the other wire in the cable.
4.Make sure the speakers are functioning correctly.
5.If you are using bridged-mono mode, ensure that the Stereo/Mono switch is set correctly.
6.Use a voltmeter to determine if the power line voltage is dropping excessively when the amplifier is
driven hard.
Playback Is Mixed with Hum
1.Check or replace the connecting cables.
2.Make sure that each screw terminal connection is tight.
3.Signal cables may have been routed too closely to AC cables, power transformers, motors or other EMI
inducing device.
4 .Try connecting another source to the power amplifier inputs. If the hum stops, the problem lies with the
original source component.
Distortion
Distortion is usually caused by excessive loss in the input controls (the mixer/equalizer/crossover can’t
produce enough output), overdriving resulting in output clipping, or current limiting caused by excessively
low load impedances.
1.Check the setting of the Input Level controls. If set too low, the preceding piece of equipment may
not have sufficient output to overcome the loss.
2.Check the speaker connections and verify that all screw connections are tight and that there are no
stray strands of wire to cause short circuits.
3 .Verify that the total load impedance presented to the amplifier is within the limits described in this
manual for the mode of operation selected.
Carver Professional
Service Department
P.O Box 83189
Portland, OR 97283
Phone 503.978.3363 • Fax 503.978.3302
email: carverpro@imagina.com
Carver Professional reserves the right to improve its products at any time. Therefore, specifications are subject to change without notice.
15locale.
WHAT IS COVERED:
THIS WARRANTY COVERS DEFECTS IN MATERIAL AND WORKMANSHIP ONLY. This limited Warranty DOES NOT
extend to: 1) Damage caused by shipment, 2) damage caused by accident, misuse, abuse, failure to perform owner maintenance,
or operation contrary to the instructions in the Carver Professional owner’s manual, 3) units on which the serial number has been
defaced, modified or removed and 4) damage resulting from modification or attempted repair by any other person than authorized
by Carver Professional.
WHAT WE WILL PAY FOR:
Carver Professional will pay all labor and material expenses for items covered under this Limited Warranty. See the next section
concerning shipping charges.
WHAT YOU MUST DO TO OBTAIN WARRANTY SERVICE:
In the event your Carver Professional product requires service, contact your Carver Professional authorized dealer/contractor o r
contact Carver Professional (ATTN: Customer Service Dept.) P.O. Box 83189, Portland, OR 97283, or call the Customer Service
Department directly at (503) 978-3363. You will be directed to an Authorized Carver Professional Service Station or receive
instructions to ship the unit to the factory. Please save the original shipping carton and packing materials in case shipping is required.
Please do not ship parcel post. Include a complete description of the problem, the associated components and connections, and a
copy of the purchase receipt. Initial shipping costs are not paid by Carver Professional. Return shipping costs will be pre-paid if
repairs were covered by the scope of this warranty.
YOU MUST RETAIN AND PROVIDE YOUR SALES RECEIPT TO OBTAIN COVERAGE
UNDER THIS LIMITED WARRANTY.
The warranty period begins from the date of the first consumer purchase from an Authorized Carver Professional Dealer. Any
implied warranties for merchantability and fitness for a particular purpose required by any state law are limited in duration to the
warranty period of your product. The warranty set forth above is exclusive and no other warranty written or oral is expressed or
implied. Carver Professional specifically disclaims the implied warranties of merchantability and fitness for a particular purpose.
EXCLUSION OF CERTAIN DAMAGES:
In no event shall Carver Professional be liable for property damage, or any other incidental or consequential damages which may
result from the failure of this product. If your Carver Professional product proves defective in material or workmanship, the liability
of Carver Professional shall be limited to the repair or replacement, at the option of Carver Professional, of any defective part.
STATE LAWS MAY DIFFER:
Some states do not allow limitations on how long an implied warranty lasts and/or do not allow the exclusion or limitation of
incidental or consequential damages, so the above limitations may not apply to you. This warranty gives you specific legal rights,
and you may have other rights which vary from state to state.
OTHER IMPORTANT PROVISIONS:
Carver Professional reserves the right to make changes in design and improvements to its products without the responsibility of
installing such changes to improvements on products previously sold by Carver Professional. We suggest that you attach your purchase
receipt to this Warranty and keep both documents in a safe place. Thank you for your choice of a Carver Professional A m p l i f i e r.
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