Knoll GRS44 Troubleshooting, Care, maintenance, and cleaning, Problem, Solutions

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Troubleshooting

Your Knoll amplifier is designed from trouble-free operation. If you follow the instructions in this manual, you should enjoy many years of high-quality listening enjoyment. However, as with any sophisticated device, there may be occasional problems upon initial installation, or during the life of the amp. The items on the list below are a brief guide to the minor problems that you may be able to correct yourself. If these solutions do not help, or if the problem persists, contact us for assistance at 1800 566 5579 in Canada or the USA or 604 940 1689. We are in the Pacific time zone.

Problem	Solutions
Amplifier won’t turn on	Master power switch turned off (No power light LED).
	Turn on Master Power Switch.
Amplifier turns on, but no audio	Input plugs not connected to proper jack or are loose.
from one or more channels	Check input connections.
No audio from one or more	Speakers are not connected properly. Check speaker
Channels	connections at amp and speaker.
Audio levels differ from sources	Improper settings or output levels from source device.
	Check the settings on your preamp, processor or
	controller. Also verify gain settings on the source
	inputs on the GRS44 rear panel.
Audio plays and then cuts off	Amplifier may be shorted. Check speaker connections
	for short-circuit at amp and speaker.

Care, maintenance, and cleaning

When the GRS44 amp becomes dirty, wipe it with a clean, dry, soft cloth. If necessary, first wipe the surface with a slightly dampened soft cloth with mild soapy water, then with a fresh cloth dampened with clean water. Wipe dry immediately with a dry cloth. NEVER use benzene, thinner, alcohol, or any other volatile cleaning agent. Do not use abrasive cleaners, as they will damage the finish of the metal parts. Avoid spraying insecticide, waxes, polishing agents, or any aerosol product near the GRS44.