Power on, low output or no output, Playback is mixed with hum, In case of difficulty – Carver CV Series User Manual
Page 24: Are and, Ervice, Ssistance, Ase of, Ifficulty
Rev 04.08.021
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C
ARE AND
S
ERVICE
A
SSISTANCE
Care: Wipe off the CV Series Amplifier’s front panel and chassis from time to time, with a soft, dry cloth. If
you have something stubborn to remove, use a mild dish soap or detergent sparingly applied to a soft cloth.
Don’t use alcohol, ammonia or other strong solvents.
Service Assistance: We suggest that you read the Limited Warranty completely to fully understand your
warranty/service coverage. Please promptly complete and return the Warranty registration card. Also, be
sure to save the sales receipt in a safe place. It will be necessary for warranty service. If your Carver
Professional product should require service, you may contact the Carver Professional Technical Service
Department by calling (503) 978-3343 or by
writing to us at the Factory address found on page 25. We will then direct you to the nearest in our national
network of Authorized Warranty Service Centers, or give you detailed instructions on how to return the
product to us for prompt action. If you should have questions or comments, please write to the Factory
address shown on page 25, or contact us via email at
or at our web site:
ase include the model and serial number of your Carver Professional product,
your complete address and daytime phone number.
I
N
C
ASE OF
D
IFFICULTY
If you are having trouble, or suspect a problem with your CV Series amplifier, try some simple troubleshooting
before contacting an Authorized Carver Professional Dealer, Authorized Carver Professional Service Center
or Carver Professional Technical Service. Below are listed some general problems and items that should be
checked in an attempt to resolve the difficulty.
No Sound, No Power
This is usually an indication of a power supply problem in either the power line itself or the amplifier’s power
supply. Check the following:
1) CV Series amplifier’s 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) CV Series amplifier’s fuse has blown. This amplifier contains no user serviceable fuses.
7) The thermal breaker in the power transformer has opened. Allow amplifier to cool and 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 connection to another amplifier that you know is working to verify that it is not a source
problem.
3) Check 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 Output Configuration Jumpers are 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, between source and amplifier’s input.
2) Make sure that each screw terminal connection is tight.
3) Signal cables may have been routed too closely to the AC cables, power transformers, motors or 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.