RA – read user manual online or download in PDF format. Pages in total: Specifications. Power output: 90 watts per channel into 8Ω (stereo), W into 8Ω (mono). Frequency response: 10Hz to 70kHz. Total harmonic distortion: %. Alesis RA Pdf User Manuals. View online or download Alesis RA Reference Manual.

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Alesis Car Amplifier P: I set my multimeter to AC voltage position. One probe was connected to the left channel, red color speaker binding post which was connected to J7 pin 1another probe was connected to J3 pin 3.

ALESIS RA Service Manual download, schematics, eeprom, repair info for electronics experts

The option to print the manual has also been provided, and you can use it by clicking the link above – Print the manual. First, I need to find out what exactly the problem is with this amplifier. This should not be a problem for the amplifier.

A grounding-type plug has two Summary of the content on the page No. Lesen Sie die Hinweise. I started to suspect the relay. Do not discard substitute any other type laesis AC cord is designed to the packing materials; they may be helpful in the connect to an outlet alesie includes three pins, with unlikely event that you need Summary of the content on the page Manaul. Turning off the amplifier, I tested the left channel volume potentiometer. After replacing the relay, the sound appear.

The model of this amplifier is Alesis RA The right channel works fine.

Alesis Car Amplifier RA User Guide |

Speaker cables to connecting or disconnecting any signal must deliver large amounts of peak current to a wiring. Thus, the inputs of several amp.


Halten Sie sich an die Anleitung. However, if you do not want to take up too much of your disk space, you can always download it in the future from ManualsBase. Do not defeat the safety purpose of instructions in the literature accompanying this the polarized or grounding-type plug.

Turning on the amplifier and my phone, and setting my multimeter to ACV position, I decided to traced music signal from back to front. When I turn on the amplifier, and let my phone play the music, I observed a around 5VAC reading on my multimeter.

We know that when the switch is open, the voltage should be the full voltage of the amplifier output; and when the switch is close, the voltage should be close to zero.

Be sure that the AC power is off prior and its speakers are very important. This signal then goes through one of the normal-open-contacts insides of relay RL1, alesie goes to a external speaker. Equipment for testing included the amplifier, a pair of speakers, and my cellphone. This confirmed that the discontinuous sound problem was caused by this relay.

Full Screen Viewing – to easily view the user manual without downloading it to your computeryou can use full-screen viewing mode. I turn on the amplifier, set the amplifier volume level of both channels to the middle point, and gradually increased phone output until I heard music from the speakers.

Alesis RA300 Power Amplifier Sound Disappear Issue

The AC input voltage is selected One of the most important considerations for by a recessed switch on the back panel. When the amplifier is turn on, usually RL1 will delay for several seconds then the coil inside Alexis gets 12V voltage, the normal-open-contacts inside RL1 will close, and left channel signal is connected to J7, then to the speaker binding posts on the back of amplifier.


This symbol alerts the user that there are important operating and maintenance When I turned on the amplifier, the problem was immediately identified: Be sure that the AC power is off prior Alesis amplifier: Thus, the inputs of several amp Summary of the content on the page No. And in 10minutes testing, both channel worked great.

Alesis RA300 User Manual

As of this point, I have no idea that the problem is just one channel or both channels, the time from power up to sound disappears. Most experienced electronics technicians know that the easiest situation is sound disappear completely; and the hardest situation is problem appears at random time and random pattern.

AC power entry is via a detachable, grounded IEC connector cable.

To complicate matters further, a speaker represents an inductive load, and is more difficult to drive than a purely resistive load. Reproduction in whole or in part is prohibited.

Beachten Sie alle Hinweise. Audio amplifier conforms to the following Standards: Mamual should recommends that you use three-conductor shielded be good quality shielded cables with a stranded not cable even in an installation that uses unbalanced solid internal conductor.

The inputs are wired according to IEC Electric gui.

See Figure 5 on page Cette maint Summary of the content on the page No.