Every time I turn power off or change input source I lose all previous channel level settings

1. Connect the output of the Yamaha MW12CX mixer to the input of the Stagepas 500 using a standard 1/4" instrument cable or an XLR cable. Connect the output of the mixer to the "LINE IN" or "MIC/LINE IN" jacks of the Stagepas 500, depending on what type of output signal you're sending from the mixer.
2. Set the levels on the mixer and the Stagepas 500. Turn down the master volume on the Stagepas 500 and set the individual channel levels to zero. On the Yamaha MW12CX mixer, set the faders for channels 1 and 2 to the unity gain position (usually around 0 dB).
3. Set the input mode on the Stagepas 500 to "LINE" or "MIC/LINE" for channels 1 and 2. This will ensure that the Stagepas 500 is receiving the correct input signal.
4. Adjust the levels on the mixer and the Stagepas 500. Slowly turn up the volume on the Stagepas 500 while monitoring the levels on the mixer. Make sure the levels are not too high and that there is no clipping or distortion.
5. Once you have the levels set correctly, you should be able to hear the sound coming through the Stagepas 500. Adjust the EQ and other settings on the Yamaha MW12CX mixer as needed to get the sound you want.

Note: The Yamaha Stagepas 500 has two more channels available, channels 3 and 4, which can also be used for additional inputs from the Yamaha MW12CX mixer or other sources.

You don't name the product but general advice may help.

I presume you have proven the channel is dead by trying multiple sources, swapping a different speaker onto it and that the balance control is NOT all the way to one side; headphones don't work either and we're down to proving it's dead before you take it in to a tech, right?

There is the slighest chance that a common control may have developed a high-resistance or 'dead' spot and is causing your symptom. Turn the POWER OFF and operate every control throughout its range a number of times, especially rarely-used ones like Tape Monitors and the Mute control.
If it still doesn't work you might want to prove if its a low-level signal loss or a high level amp failure.

One way would be to run an RCA cable pair from the Tape Out to any other device (even a TV with speakers) you might have that accepts an audio input. If IT can't detect receive the DEAD Channel you're losing it in the preamplifying or source selection stages.

If it CAN be played externally, the receiver is losing it on its way to or at the amplification stage. Further isolation might require hands-on technical expertise.

There is a chance that a common control may have developed a high-resistance or 'dead' spot and is causing your symptom. Turn the POWER OFF and operate every control throughout its range a number of times, especially rarely-used ones like Tape Monitors and the Mute control.

If it still doesn't work you might want to prove if its a low-level signal loss or a high level amp failure.

One way would be to run an RCA cable pair from the Tape Out to any other device (even a TV with speakers) you might have that accepts an audio input. If IT can't detect receive the DEAD Channel you're losing it in the preamplifying or source selection stages.

If it CAN be played externally, the receiver is losing it on its way to or at the amplification stage. Further isolation would require hands-on technical expertise.

Hello
First of all reset the TV. for that

press and hold the POWER button
on the TV control panel for 5 or more seconds to reset the TV.
Then connect the TV tt any source like outdoor areiel or cable box etc, select the appropriate input, and retune the TV. First of all, connect it to an external antenna, and set it to autotune.

• You must configure the ANT/CABLE input source before

programming channels (-left-hand column).

• If the ANT/CABLE input signal type is set to Cable, the

automatic channel programming process erases channels

that were previously programmed into the TV's memory.

• If the ANT/CABLE input signal type is set to Antenna, the

automatic channel programming process adds newly found

channels to the existing set of programmed channels (and

does NOT erase channels that were previously

programmed into the TV's memory.) To remove an Antenna

source channel from the memory, you must manually delete

it.

• To tune the TV to a channel not programmed in the channel

memory, you must use the Channel Number buttons on the

remote control.

• Programming channels when the ANT/CABLE input is

configured for Cable will take substantially longer than when

the antenna input is configured for Antenna. This is normal;

however, once channel programming is finished, you should

not have to repeat the programming process again unless
your Cable TV service lineup changes significantly.
Find out the received channels are clear or not. If they are clear, your TV is perfect, and the input device you connects ot the TV is faulty. OK.

"KENWOOD" KR7050?

I presume you have proven the channel is dead by trying multiple sources, swapping a different speaker onto it and that the balance control is NOT all the way to the right; headphones don't work either and we're down to proving it's dead before you take it in to a tech, right?

There is the slighest chance that a common control may have developed a high-resistance or 'dead' spot and is causing your symptom. Turn the POWER OFF and operate every control throughout its range a number of times, especially rarely-used ones like Tape Monitors and the Mute control.

If it still doesn't work you might want to prove if its a low-level signal loss or a high level amp failure. One way would be to run an RCA cable pair from the Tape Out to any other device you might have that accepts an audio input. If IT can't detect receive the Right Channel you're losing it in the preamplifying or source selection stages.

If it CAN be played externally, the KR is losing it on its way to or at the amplification stage. Further isolation would require hands-on technical expertise.

I would suggest you try to find a universal remote that has an "input" or "source" button and program that one to your tv. By pressing the "source" or "input" button, it will change the input to the tv. I hope this helps! -Der Strom

you need a service repair, on that ckt there's an IC function as memory IC replace that part and all your program well be stored. can found that ic most likely near switch botton area 4 or 8 pin IC.

Hello. I may be able to assist you. If you are using a direct cable connection from the wall outlet;

• Check the incoming cable or antenna signal connection to ensure that it is properly secured to the TV's antenna input.
• If the connection is good, perform the automatic installation again to search for all available channels.

If you are using a coaxial connection from the Cable or Satellite box to the TV;

• Set the TV to the channel specified by the service provider.
• Change the channels at the Cable or Satellite box to view the program.

If you are using a video connection (CVBS, S-Video, YPbPr, HDMI) from the source (DVD, Cable or Satellite box) to the TV;

• You do not need to perform automatic installation to search for the channels.
• Press the 'SOURCE' button on the remote control repeatedly to select the correct input source.

If you are using an HDMI connection from the source (DVD, Cable or Satellite box) to the TV;

1. Reset the TV and source by unplugging it from the power outlet for 30 seconds.
2. Turn on the TV and press the play button on your source device. If the source is HDMI CEC compliant, the TV will automatically switch to the HDMI input.
3. If your source is not HDMI CEC compliant, turn on the TV and switch to the HDMI input.
4. Turn on your source.

If you are sure you have selected the correct input or channel but still have no picture or sound;

• Try resetting the TV by unplugging it from the power outlet for 30 seconds.
• Press the 'SOURCE' button to select the correct input source.
• Check the connection cables.
• Try the connected source with another TV.
• Connect a different source on the same connection of your TV.

Normally when you get a no signal and you have a working source, this means that the contact points that are soldered on the micro board are lose or have been broken off the board by excessive force. you can fix by removing the back cover and re soldering this VGA input socket back on the board correctly.

Sounds like you're connected to a cable, satellite, or DVR box ("set top box"). Many times these units have their own volume controls.

Try reducing the volume of the set top box to 80% or below, preferrably somewhere between 50% and 70%. When the volume is set too high, the background noise will be amplified as well, which then gets amplified by your receiver and becomes audible.

You will need to adjust the volume level of your receiver to compensate for the lower input level, and keep in mind that some channels may have more noise than others. It'll be a balance between having all your input sources are relatively-similar input levels (so you don't have to adjust the volume a lot when switching between sources) and how much noise you can hear or ignore.