Question about Sony STR-DB930 Receiver

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Volume control turns around - front part of the shaft snapped

The front of the volume potentiometer shaft (aluminum) accommodating the LED had snapped off the back part which is riveted to the turning wheel by two tiny rivets. To fix this will I have to look for the whole volume PCB (Sony part 1-673-362-11) or have I got any other alternatives?

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Unfortunately you will need to replace the original part to service your receiver.

Jerry G.

Posted on Jan 08, 2009

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Possibly a bad volume/on/off volume potentiometer. Try using canned air around the volume/on/off knob to remove any debris down along the shaft. If this does not help, your unit may need repair. Do not use any chemicals, cleaners or solvents on the shaft, only use air.

Clean your internal battery contacts on the batteries and the radio with a pencil eraser to assure good connection. If you are using rechargeable batteries, try charging the batteries again.

If this does not help, your unit may need repair.

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Need a part # for the volume potentiometer. It has been cleaned several times already & the shaft is loose/wobbles & sound is staticy/comes & goes as volume is raised & lowered &/or...

There are many configurations for volume potentiometers - If you remove yours, you can get the serial number off it and go to a local electronics supply store ( or website , like you should be able to purchase the right one. If the shaft is wobbling, you may be able to tighten up the casing by bending the tabs on the back of the casing - make sure you're squeezing the casing closed with the shaft in the proper location. If you have talent ( this part is really challenging for me ) you can straighten out those tabs, disassemble the switch, clean the contacts with a pencil eraser, regrease with dielectric grease and re - assemble. Personally I would just buy another - much easier!!
Good luck either way!!

Nov 23, 2010 | Audio Players & Recorders

1 Answer

Just realized your not insignia and want money, ********

A) This is not Insignia.
This is a Product Support website.

B) This recent post of yours is in the Free section, and looking back at your problem you posted, it is in the Free section also.

C) The website does have a Premium section where problems are charged a fee.
You're not in that section.

Shall we go on, and delve with your volume control on your sub-woofer?

The Volume Control on your sub-woofer is a Potentiometer. A variable resistor in this case.

Observe the top photo, then go to the illustration below it.
(You can click on the photos/illustrations, and enlarge them. You can enlarge twice)

The construction of a Potentiometer varies in it's usage, and by the manufacturer.
(I doubt Insignia makes their volume controls. They buy from a manufacturer that does)

Your volume control won't look like the second illustration down, but it gives an illustration to show you to help explain the following;

See the triangular shaped piece that extends from the shaft in the middle? Number 3
This is the Wiper Arm.
Note the round shape that the Wiper Arm will slide against. The circular outside portion.

The circular outside portion is a Resistor. There is a contact on one end of the circular shape, and a contact on the other end of the circular shape. (Or a contact on either end of the Resistor)

With the Wiper Arm at one side of the Resistor, no volume is allowed out. As the Wiper Arm is slid across the Resistor, more volume is allowed to come out. When the Wiper Arm is at the other end of the Resistor, there is no resistance, and you have full volume.

With a volume control you are not turning the volume up.
The volume is already at full blast. When you turn the volume control you are allowing more of the volume.

It could be compared to having a garden hose in your hand, the water is already on full blast, and you have the hose pinched off with your fingers.
The more you let go of the hose, the more water comes out.

The popping sound you hear is a dirty contact between the Wiper Arm, and the Resistor. A few spots on the Resistors surface, actually.
OR, there is a worn off surface on the contact end of the Wiper Arm.

Would mean the volume control would have to be accessed.

For dirty contacts:
You could try removing the volume control KNOB, and using the plastic straw provided, use an electronic cleaner. (Spray can)
Squirt the cleaner down in the volume control, then turn the shaft back, and forth.

If this doesn't do it then the volume control would have to be replaced.

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Try spraying some electrical contact cleaner into the volume potentiometer - i.e. take off the volume knob, then spray the cleaner at the base of the plastic stalk.

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The problem you describe is common to JVC amps. This control has a motor mounted on the back of the circuit card that drives the volume control up or down using the remote control for this system. The looseness of the volume control cannot be repaired. The shaft has separated from the potentiometer. I don't know if JVC has this part any longer but it has to be replaced as a unit (volume control card).

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