Instruction/ maintenance manual of the product MA250 Knoll
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Trigger does n ot 1. Measure trigger voltage with a voltmeter. It work needs to be 11-16 volts DC to work (cur rent is about 35mA total per amp). See page 5 for details . Speaker pops 1. Speaker may need resis tor placed across termin al . when MA250 is Suggest 2000 oh m 1/4 watt.
Precautions: The am plif ier is a wideband design with substantial power output capability. Certa in precaut i ons must be taken to ensure proper operation: 1. Never expose the unit to mo isture. 2. Never p l ug an input cab le into the amplifier while the amplifier is turned on.
Hum and noise In most cases, one of the foll ow ing suggestions sh ould he lp you solve a hum noise in your system. P lease try these steps in the order shown, proceeding from one step to the next if the pr ior suggestion does not eliminate the problem.
9. If a video si gna l is being used to trigger the MA250 on and off, connect good quality short as poss ibl e video wire with a RCA jack to the MA250 “Video Input”. Make sure the mus ic sense button i s OUT. 10. If the mus ic sense or video input is being used to turn the MA205 on and off, set the “Mus i c Sense ” button to OUT.
An important point after buying a device Knoll MA250 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Knoll MA250 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Knoll MA250 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Knoll MA250 you will learn all the available features of the product, as well as information on its operation. The information that you get Knoll MA250 will certainly help you make a decision on the purchase.
If you already are a holder of Knoll MA250, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Knoll MA250.
However, one of the most important roles played by the user manual is to help in solving problems with Knoll MA250. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Knoll MA250 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
