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Hi, I've got a Sanyo hifi on which the motorised volume knob no longer works. It is not a fault with the remote control as I have tested this. Suggestions welcome! -Jamie

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  • 2,071 Answers

Just clean it with alcohol and reworks solder joint so it will function normally..

hope this may help;


Posted on Aug 21, 2008

Motorized volume control has to be serviced. Either the drive circuit or the motor/linage is defective

Posted on Aug 19, 2008

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1 Answer

Sound cuts off, but if I touch the master volume contorl knob it comes on for a short time. Do I need a new knob, or something else?


Possible that there is fault in the preamp analogue/logic control. When you touch the volume control knob the static from you partially injects the circuit to work and thereby conduct to produce the volume.
The volume controller is an analogue rheostat coupled to a circuit that can be the suspect , it can even be a fault- open circuit- of the controller.
You can remove the top cover after disconnecting the power supply and check behind the volume knob for the circuit. If you are able to test this circuit , it will confirm the case.

Oct 07, 2011 | Teac AG-D9100 Receiver

3 Answers

Yamaha RX-V1000 volume control erratic, remote doesn't work. All was well then the volume control knob became erratic (volume would change erratically as knob was turned in either direction, remain...


sounds like you need to take it in to have it looked at. no simple fix unless you are an appliance technician. hard to walk a beginner through. i suggest calling an stereo repair guy.

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Aug 21, 2011 | Yamaha RX-V1000 Receiver

1 Answer

The manual knob for adjusting the volume does not work


If the Volume goes up with the remote controller then the fault is the failure of the stepper motor on the volume controller knob unit. The digital output must be converted through the D/A converter to a motor driver to show the indication of volume .
However if there is no change with the remote then the processor output and the converter section must be traced to find the loss of signal- possible failure of a digital gate.

Jan 19, 2011 | Yamaha RX-V1000 Receiver

1 Answer

Kenwood VR-6070: Broken volume knob; will IR sensor still work?


Looks like you have several faults?
First try to fix the remote:
http://www.instructables.com/id/Repair-your-remote-controls/

May 28, 2009 | Kenwood VR-6070 Receiver

1 Answer

Volume control on unit


Kent, Unfortunately, it sounds as if the encoder is broken. The encoder is a digital input which takes the place of a traditional volume control, and is what holds the volume knob in place and spins. Since it works fine with the remote, that means everything else is ok, but you will have to replace, or have a tech replace, the encoder itself.

Sep 14, 2008 | Yamaha HTR-5550 Receiver

1 Answer

Kenwood kr-v9020


You should find out who does the service for your reciever in your area. This type of fault can get fairly involved. It will require trouble shooting and then ordering the necessary parts.

The fault can be the motor, or the electroncs in the servo drive amplifier for the motor.


Jerry G.

Jun 10, 2008 | Kenwood KRF-V5060D Receiver

2 Answers

Remote no longer works for volume control


Guys, I might have accidentally found the problem because the fix worked for me :). I have the RX-V995 and for the last 2+years or so, I had resorted to getting up and using the knob manually for volume control. System will show 'voluem up/down' in the display, but the knob didn't rotate. Same problem as yours.

I was getting ready to buy the service manual, find the knob motor which I thought was the main culprict and replace with a new one.

So I took out the top cover (just a few screws), the front face-plate (again just a few screws. The inner details were all visible. The volume knob circuit board was vertically placed. They were all covered in a good layer of dust. I got my Dyson vacuum cleaner and gently and carefully tried to **** up all the dust that had settled down. With soft front brushes, I agitated the dust I couldn't reach with dyson wand direclty, once dust were loose, dyson did a great job even with picking up those last dust pieces.

I couldn't succeed in taking apart the volume knob circuit board, as I was still awaiting for the service manual. I put all the covers back on and guess what? I used my remote and the knob was moving again. Responding very well, the knob made the full turn, when I was on the remote. It has been working perfectly for the last few days now.

I think I know what was happening. Teh top of the RX-V (and I am sure many Yamaha receivers) are very porous to allow for good heat dissipation. Over time, this allows a large amount of dust to collect on top of the parts. Most parts are electronic (not mechanical) and hence don't get affected by the dust. But the few mechanical parts might have adverse affect if dust settles down in between the rotating mechanisms.
My volume knob had stopped responding to remote command, very slowly. Initially it worked a little, missed a little, then it missed a lot and eventually it didn't rotate. That proves the theory to some extent that if the motor had completely failed, it would stop working from the get-go, not intermittently. Dust build-up provided intermittent contact between the parts and hence the response was intermittent.

The dyson vacuum did a great job in pulling out those fine dust from such parts and amazingly, things are looking very good at present. Honestly, I hadn't the slightest hope that vacuuming would fix the problem. I had vacuumed to make it easy for me to work on the parts :).

So, it doesn't hurt at all to just give it a try. Do open the covers so that you can reach closer to the real boards and parts.

Good luck and let us know!!!
cheers
PN from San Jose, CA

Apr 02, 2008 | Yamaha RX-V995 Receiver

4 Answers

Volume Control


The volume control shaft lube, over time and heat exposure, will flow down and corrupt the contact between the volume twister and the spring loaded sensor. Pull the cover off the tuner, locate the volume control and take out the two screws holding it in. It looks like a small circuit board with the volume twister attached.
The base of the twister is hooked to the circuit panel by four metal tabs. Pry these guys gently away and pull the twister free. There will be a metal disk at the end of the volume control shaft, and will have a goopy lube residue on the face of it that can be cleaned with electric contact cleaner or some other kind of solvent. Wipe it clean,(do not immerse) reattach, and test. Worked perfect for me.
Good Luck,
F

Feb 25, 2008 | Pioneer VSX-D509S Receiver

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