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Vision 708 mixer amp

I HAVE A STUDIOMASTER VISION 708 MIXER AMP WHEN I TURN IT ON ITS OK FOR A FEW MINS BUT THEN THE RIGHT CHANNEL GO'S OFF. IT FADES AWAY. AND IF I TURN UP THE VOLUME IT SLOWLY COMES BACK ON. BUT WHEN ITS BEEN ON FOR BIT IT SPLUTTERS LIKE A BAD CONNECTION. I HAVE CLEANED ALL FADERS & CANT FIND A FAULT IN ANY FADER OR POT THAT MAY CAUSE THE PROBLEM. WHEN THE RIGHT CHANNEL IS OF. THE METRES LEFT & RIGHT ARE STILL FLASHING. SO I PRESUME ITS NOTHING TO DO WITH THE INPUT. INSIDE THE AMP THERE ARE TWO LED'S THEY ARE MARKED..LEFT FAULT & RIGHT FAULT.. THESE ARE NOT LIT IT HAS A ON BOARD COMPUTER THAT GIVES HELP. I DONT KNOW IF IT DISPLAYS FAULTS IF THERE IS ONE..IT IS NOT DISPLAYING ANY FAULT. PLEASE ANY IDEA WHAT MAY BE GIVING ME THIS FAULT YOURS JIMBO jimbo11757@yahoo.co.uk

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  • JAMES TURNEY Jan 08, 2008

    Thanks bbtoast...
    I never even gave the mains input to the amps may be at fault.
    there being x2 inputs for each amp.
    I will take a look in morning and let you know. I may find the dry joint i've been looking for. since it go's off when volume increased a dry joint would tend to arc.
    maybe cause the disstortion?
    i wiil get back to you ..... jimbo

  • JAMES TURNEY Jan 16, 2008

    Hi bbtoast..I have been looking at amp but no joy.
    BUT when the amp is on there is a little sound coming out, and when i turn up volume it try's to work, but this is when you get the cracklin niose. as if there is somthing that will not connect ?
    should i be looking at the output pannel or the pre amp pannel. is there a way i can check the right amp pannel output is ok.
    then if this is ok then it has to be a fault elseware on the amp but not the output.
    dont forget this is a 8 channel mixer amp
    and there is a lot of plug in leads?
    come on get your brain working...
    plus sometimes both channels work fine..
    and the it fades out again...
    what do you reckon it might be..and how can i check the main right output board is OK...

    thanks jimbo

  • JAMES TURNEY Jun 03, 2009

    Helo all. I've been away for quite some time.
    But to update you on the above fault. I found it.
    It was the line input jacks at the rear of amp
    they are make n brake. because there open to the air they dry up dont close & thus it shuts of the signal from the mixer. gave them a clean & a little servisol & now they work fine.
    sorry for the long break but I'm back now.
    please look at my latest problem with a sound lab mixer amp..jimbo

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Jimbo

I am not sure about the LED fault lights....but I have a few troubleshooting angles to provide a start:

Try checking the power supply at the output devices and compare with the good (Left) channel.

The distortion you are hearing may be due to
low voltage.

This is a stereo amp, so you have a good (Left) channel to compare with. Use a multimeter to compare resistances (no power applied) or voltages (power on) at the components working back from the outputs of each channel. When you find a difference you have located the faulty area.
If you can get an oscilloscope it can also be used to trace the path back from the output of each amp. Good Luck Be careful!

Posted on Jan 08, 2008

  • Brian Berndt
    Brian Berndt Jan 08, 2008

    I did find some info on the LED Protect lights:



    One or Both Amplifier channels stop working briefly…

    (one or both Protect LEDs illuminate briefly)

    1. Check the ventilation holes both front and rear for good air flow.

    2. Check that the speaker load on each channel is not less than 2 ohms.

    3. Check that the amplifier is not being over driven - red peak LEDs should not be illuminated

    'continuously'.



    This info is for a newer Amp, but should be relatively comparable to your situation.

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That is indicative of worn motors brushes or a speed regulation circuit board problem. It is worth getting it fixed.

I just checked and my diagnosis is sound :>)

I have a kitchen aid stand mixer. model #rkt2651x. it goes - Fixya

www.fixya.com/support/t26909658-kitchen_aid_stand_mixer_model
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What size fuse is needed for a 600b mixer?


I am guessing you have an older Peavey mixer amp. I believe these mostly used 8 amp fuses although older earlier ones may have used different. It should say on the back at the fuse holder. You can get these at Radio Shack, at better hardware store in either auto electrical or electric sections or on line.

Oct 05, 2014 | Food Mixers

1 Answer

Kitchenaid mixer motor quit , I dont really see any thing wrong with the brushes.


Obtain a copy of the Repair Part List for your model from Kitchenaid.com.
Download a Copy of the Kitchenaid Service manual.

http://www.kitchenaidparts.be/centers/servicemanual/mixer.pdf

First, you may want to adjust the mixer's speeds:

1. Loosen the lock nuts enough & Turn the 2 top screws clockwise until they cannot be turned
anymore. Leave the bottom screw alone for now.
2. Use a dab of white paint or paper whiteout to mark the positions of the Phillips screws.
3. Plug in your mixer and Set the speed selector to "Stir".
4. Turn each top screw One full turn couterclockwise (alternating between Left and Right)
Keep making one full turn at the time (for both left and right) until the motor starts running.
5. Put your hand near the Agitator shaft and allow it to brush your finger slightly. Use your
watch or clock and start counting the number of times the shaft touches your finger in
60 seconds. The correct count should be 60 RPM (Rounds Per Minute). If it is less
or more than 60, give each screw 1/4 turn counterclockwise or clockwise and start counting
again. Now tighten both lock nuts.
6. Set the speed selector to "6" and turn the bottom screw either clockwise or counterclockwise
to achieve a speed of 180 RPM.

For your reference, the planetary RPM's for the 5-qt. tilt-head Artisan Stand Mixer are as follows:
Stir speed - 60
Speed 2 - 95
Speed 4 - 135
Speed 6 - 180
Speed 8 - 225
Speed 10 - 280

Second, if the mixer won't run:
Remove the Control Plate Assembly (36), the Phase Control Board (39)
and the motor Governor Assembly (35). Inspect for loose connections,
burnt or damaged components. If they seem to look OK, re-assemble
them and test the mixer. If the motor still won't run, then I might suspect
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Aug 01, 2011 | KitchenAid K45SS Classic Stand Mixer

1 Answer

I was grinding some meat and my mixer got very hot. I let it cool down and now it only operates at one speed.


I am not sure what has happened to your mixer but, select
different speeds from Stir to 10. If it runs OK, then there is
nothing to worry about, otherwise do the following to re-adjust the mixer's speeds:

Get a copy of the Repair Part List of your model from Kitchenaid.com
Remove the screw holding the End Cover and locate the three screws from the Control Plate.
All three (2 top left and right, and 1 bottom) must be adjusted.

1. Loosen the lock nuts enough & Turn the 2 top screws clockwise until they cannot be turned
anymore. Leave the bottom screw alone for now.
2. Use a dab of white paint or paper whiteout to mark the positions of the Phillips screws.
3. Plug in your mixer and Set the speed selector to "Stir".
4. Turn each top screw One full turn couterclockwise (alternating between Left and Right)
Keep making one full turn at the time (for both left and right) until the motor starts running.
5. Put your hand near the Agitator shaft and allow it to brush your finger slightly. Use your
watch or clock and start counting the number of times the shaft touches your finger in
60 seconds. The correct count should be 60 RPM (Rounds Per Minute). If it is less
or more than 60, give each screw 1/4 turn counterclockwise or clockwise and start counting
again. Now tighten both lock nuts.
6. Set the speed selector to "6" and turn the bottom screw either clockwise or counterclockwise
to achieve a speed of 180 RPM.
For your reference, the planetary RPM's for the 5-qt. tilt-head Artisan Stand Mixer are as follows:

Stir speed - 60
Speed 2 - 95
Speed 4 - 135
Speed 6 - 180
Speed 8 - 225
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1 Answer

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Hi NG345, Merry Christmas and Happy New Year! It sounds like you’ve got the right part to fix your mixer, now you just want to install it correctly. The good news is that your replacement spring can be installed quite easily (OK, maybe a little effort) by yourself, if you are a DITY type person and feel adventurous, and your mixer is not under warranty. Be sure you have the Parts List manual on hand, too. If you're lacking one, you can download a PDF version from the KA website: http://www.kitchenaid.com/flash.cmd?/#/page/home.
Click on Customer Care>Locate Manuals & Guides> Enter the 6 character model number, in your case use KSM50P (Your K5SS mixer falls within this manual), and select the first file KSM50P.pdf (438.31 KB) listed under Parts List (4) and then check to verify this matches your mixer model.
Turn to pages 6 & 7, titled “Motor And Control Parts”, which provides an exploded view for the disassembly and reassembly of your mixer’s electrical components, along with all the parts. You’ll want to focus on Illus. Nos. 1, 2, 3, 4, & 5; Pivot screw, Spring washer, Speed control assembly lever, Control plate spring, and Speed Link & Cam, respectively. Your speed control assembly is attached to the bottom of the top part of the mixer’s head (or Illus. No 1, Gearcase Motor Housing, on pgs 4 & 5).
Finally, here are some links to several excellent websites that detail the disassembling/reassembly of a KA Mixer. The mixers displayed in the links are different KA models, but the principles are the same.
Between these three websites and their excellent pictures and descriptions and your Parts List manual, you should now be able to completely disassemble and reassemble your mixer, should you decide to go that route.
If you feel this repair is beyond your capability, then I would seek out a local small appliance repair shop in your area. KA Customer Care can give you names of local KA authorized repair shops in your area, but you can also do an online search to supplement what KA may provide you. Call to explain your circumstances and find out their hourly rate and get an estimate of what they think it would cost to repair your mixer. Also, always obtain three or more estimates – do some comparison shopping.
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If this solution was helpful, please rate it, thanks! – hslincoln

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1 Answer

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2 Answers

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1 Answer

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