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My HDMI output on TV keeps flickering on / off when connected via my Yamaha RX2700 amplifier. The signal initially works for about 20 x minutes and then starts flickering. When the HDMI cable is connected directly to the TV, the signal works fine. I have tried both a Samsung and Sony DVD player. I have a HDMI version 1.3b cable. Could it be a ''handshake problem''? Would I need a higher spec cable? Please assist Andre

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Look for hdmi output in amp if it is rusty or dusty put a drop of cleaning oil in it and insert cable 10 times init and see if it works there is nothing wrong in cable as it works directly must be a connection problem due to dust or rust

Posted on Jun 04, 2010

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Marshall Amp Quit


According to the schematic, once the signal is initially amplified (also where the LED shows signal), the audio is sent to the send/return jacks (shown on pg3-C7). A quick test to see if audio exists at the insert point will require an insert cable. An insert cable can be a balanced 1/4" cable which splits out to two mono 1/4" connectors or a pair of RCA's. Connect one of the insert outputs to a console (if 1/4" cable) or a tape loop on a home stereo receiver (if send cable splits out to RCA's) and see if you've got sound when playing your guitar (with LED on the Marshall showing signal). If no sound, go to (A) below. If you have sound, go to (B) below.
(A) Ten pin connector labelled CON2 (shown on pg5-B1). Make sure connector is tightly seated and that the pins on the jack and the female connectors in the plug are clean and that good contact is being made.
(B) Twelve pin connector labelled CON1 (shown on pg5-B4). This is the DFX board - make sure this is tight and well seated.

According to the schematic there are voltages seen at several of the connection points previously mentioned. If you have a multimeter and are qualified and careful - check to make sure the voltages are present as shown.

If you're not qualified - meaning you have little or no experience - STOP and refer this repair to a qualified bench tech. They get paid to keep the magic smoke inside the amplifier. You may end up damaging things worse or even beyond repair or even damaging yourself.

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1 Answer

I want to purchase a behringer 15 band graphic equaliser and connect it to a numark 5000fx mixer via skytec pro600 power amp can you help.


The signal path to follow is explained below:

*Audio Source(Cd/LapTop/Ipod)output to,
*Numark 5000FX Input, Then master/main outputs go to,
*Behringer FBQ1502 Inputs, then outputs go to,
*Pro600 Power Amplifier Inputs, then power amp outputs hooked up with a speaker each side.

Hope this helps.

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Europower PMP5000, In the Front Panel there is a Main 1 & Main 2 output, can I connect both to 2 Amplifiers so I have four independent outputs or 2 Stereo outputs? Can I Use these two outputs + mon 1...


Yes, you can use both the main1 and main2. They are independently driven and please note that they are PSUEDO balanced drives... that is the cold side of the balanced line is NOT driven as a complement, but is merely returned to signal ground by a 120 ohm resistor. This CAN cause hum problems or noise pickup depending on the connected equipment and ground loops. Best to run this into amps/speakers thaat have TRUE balanced inputs and also keep the power source the same for all devices.

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1 Answer

Aux1 and 2 are not working...what is the fix on the emx5016cf yamaha board


You are NOT trying to drive speakers from the aux outputs are you? These are LINE outputs that should be using TRS balanced lines to either powered speakers or amplifiers. Often these are used for monitors. The monitoors MUST be powered versions or use external amplifier if the speakers are passive..

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The speaker connected to my Yamaha EMX 312 SC is not bringing out any sound when we use the microphones but the displays on the power mix shows there is activity.


Assuming that you have checked the speaker leads for broken connections and that you know the speakers themselves work okay (test with a different amp) and that you can hear sound on the headphone socket
  1. Check that you actually have the power amp switch in the right position for the outputs (monitor jacks or main neutrik/speakon sockets) that you are using (see page 25 of the manual)
  2. That your speakers are connected to the speaker outlets on the rear panel and not the 'main outputs' on the front panel, which are for use with a separate power amplifier
  3. Check the mute button is not in
  4. You have turned both the master volume controls up.
If none of the above solves the problem it is likely that the overload protection fuses on the amplifier output stage have blown and need replacing - take to a repairer
You can find the user's manual here
http://www2.yamaha.co.jp/manual/pdf/pa/english/mixers/emx512sc_en_om_d0.pdf



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How do I attach power amp to 1832 mixer


There are a number of configurations for a mixer like the 1832, the most common are PA system and Recording system. There are Main output jacks which carry the mix as summed in the main faders. These in a PA system would feed the pa amplifiers which drive the house speaker system for the audience. These connectors are XLR 3 pin type on the rear, intended for professional pa amplifiers which use balanced +4dbv line input level. Amplifier which have 3 pin XLR connectors for input signals can accept that high level signal. For home style HiFi amplifiers, the signal level is nominally -10DBv and balanced or unbalanced signal lines with 1/4in diameter phone plugs which are connected to the mixer by way of a second set of Main output connectors which are 1/4in phone jacks. Use whichever amplifier input level your amp has.
If you are not using it as a main PA house mixer, but using it for recording, the main output connectors go to a 2 channel recorder or computer sound card recorder. The power amp and your monitor speakers are connected to the connectors labeled "Control Room" (CTRL Rm). These output are useful for recording because the signal through the mixer can be monitored from several buses, Solo, main mix, selected by buttons provided. The buttons only affect the signal heard through the control room monitors, and not the main output which only sees the main mix so selecting "solo" does not interrupt the signal going to the recorder while the engineer in the control can be checking other signal paths through the board.

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1 Answer

Can I connect a Yamaha DGX-500 piano to an amplifier?


yes - use two RCA cables from the left and right audio output and connect it to the aux audio RCA inputs of an amplifier or receiver.

Dec 06, 2010 | Yamaha Full-Size Keyboard

1 Answer

My amp breaks up too much and sounds messy. I changed the tubes and resistors and it helped a little but didn't solve the problem. Could it be my speaker?


colearthur16, Only a slight chance of problem with your speaker. You will need to prove that all stages of amplification of the audio signal from input to output are not being driven into distortion (clipping) because of a bad DC power supply rail to the low level amplifiers or the high power "final" output amp! To prove this, you will need the help of an electronics technician who has access to a variable audio signal generator (amplitude and frequency) and a cheap 5 to 20 megahertz oscilloscope to view the amplified waveforms of the amplifier stages in the Fender Amp. Remember the following statement for the rest of your life!!! "All musicians who use electronic amplification to play musicial notes through speakers should have between 4 and 8 hours of classroom instruction on how typical amplifiers (tube and solid state) operate and how to troubleshoot them when they fail to perform to rated specifications!!!"
Cole, have the Fender amplifier (not the speaker) tested by a qualified technician to prove amp is not at fault!!! 12fixlouie

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3 Answers

How do i connect yamaha mixer to pc or yamaha receiver


I am sorry to disagree, but some information in the previous post is INCORRECT. DO NOT connect the output of the mixer to the MIC input. The mixer generates LINE level output that should go to the LINE-IN on the sound card. If you connect the mixer to the mic input, you will damage the sound card. MIC level inputs have an additional amplification stage.

Dan

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2 Answers

On power up there is a loud humming even with volume at 0


I would also be inclined to check all the larger electrolytic capacitors in the power circuits as well for AC bleed.

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