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TOA 903A Lack of volume when unit is powered on. After master volume is rapidly twisted from 0 to 100%, speakers krackel and music slowly comes back to an acceptable level. Have sprayed a contact cleaner in master volume rheostat (knob), this has helped a little, but the unit is still unreliable.

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If the volume control does not appear to be defective, I would next check the speaker relay. If the contacts there are corroded, the symptoms will be as you describe. The higher voluime level will allow the initial "connection" to occur with the unit working almost normally after that. Replace the relay with a new one. You should be able to get one from TOA.

Dan

Posted on Nov 16, 2009

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Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Marantz-SR7002-Receivers-manual/id/6753ci475/t/2/

Page 81...


PROTECTIVE FEATURE


In some cases, the STANDBY indicator may blink slowly, twice per second. In this case, turn off the unit, unplug the power cord, and check the following points.


Make sure the speaker cables are not reversed and connected to the wrong sides (+ and -) on the unit.


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Make sure the volume does not exceed the level that the unit is capable of producing.


When using the unit in a rack or other enclosed space, heat may build up inside the unit and cause a fire. When installing the unit, be sure to leave suffi cient space between the top, back and both sides of the unit and walls or other AV components to prevent the internal temperature from rising.


After checking these points, plug in the power cord and use the remote controller to turn on the unit. Turn down the volume before resuming playback. Confirm that there are no problems with the speaker connections and playback performance.


If this symptom recurs, request service at your nearest service center.


In rare instances, the unit may enter standby mode and the STANDBY indicator may blink rapidly, 8 times per second. In this case, unplug the power cord and request service at your nearest service center.

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