Trouble shooting – Carver ZR500 User Manual
Page 12
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)
ZR 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)
ZR Series amplifier’s mains fuse has blown. This amplifier
contains no user serviceable fuses inside the chassis.
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 sensitivity 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 Input
and Output configurations are set correctly.
6)
Use a voltmeter to determine if the power line voltage is
dropping excessively when the amplifier is driven hard.
7)
The thermal breaker in the power transformer has opened.
Allow amplifier to cool and the breaker will reset itself.
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.
DISTORTION
Distortion is usually caused by excessive loss in the input
controls (the mixer/equalizer/crossover cannot produce enough
output), overdriving resulting in output clipping, or current
limiting caused by excessively low load impedance.
1)
Check the setting of the input level sensitivity controls. If
set too high, the preceding piece of equipment may overdrive
the input stage.
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 mode of
operation selected.
TROUBLE SHOOTING
If you are having trouble, or suspect a problem with your ZR 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.
FOR SERVICE OR CUSTOMER SUPPORT INQUIRIES
MAIL TO:
Carver Professional
Service Department OR Customer Support
9300 North Decatur
Portland, Oregon 97203
CALL:
SERVICE DEPT
503.9783343
CUSTOMER SUPPORT
503.978.3344
FAX:
503.978.3302
EMAIL:
www.carverpro.com