Question about JVC MX-J30 CD Shelf System

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JVC MXJ30 Compact Hi-Fi

Volume control breakdown. Is it the 'pot' or something near the chip?
Spares from JVC?

Where's the cheapest remote?

Where's the cheapest Service manual?

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Spares from JVC? Where's the cheapest remote? Where's the cheapest Service manual?

Posted on Feb 08, 2010

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Posted on Jan 02, 2017

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Volume only goes to 50%


If the volume control is a potentiometer then you can replace the pot. If it is a button type then the electronic circuitry (chip) associated with it is in need of repair.

Repair will not be cheap - can you live with the 50%?

Sep 06, 2015 | Toshiba MD20F51 20 in. TV/DVD Combo

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Can you purchase a JVC KDR210 replacement volume knob?


Hi Carrie,
I believe that you can. If you search online for "replacement volume knob JVC kdr10" you'll get a number of hits. Including. eBayeBay and. Genuine JVC Spares Accessories this last one offers deliveries worldwide.

Jul 24, 2015 | JVC Car Audio & Video

1 Answer

Jvc kd g245


These are the setup codes to JVC HI-Fi systems. 3029 3030 3012 3014 3038 3069 3077. Check which brand remote control have these codes with its code list. You can see more details http://electrohelponline.blogspot.com/

Jun 16, 2013 | Televison & Video

1 Answer

Mini hi-fi JVC CA-FSX3 stops after power on


Well, I disassembled the unit carefully. And I've found that diode SR303 was blown. It's very easy to find near huge pulse-code converter chip. This diode is used at power supply stabilization for amplifier that has a D-class i.e. pulse-code amplifier, and for CD part. Testing of this diode confirmed that it's dead. After a couple of days received the diode from shop, is very cheap. Changing the diode recovered all the functions of the unit. Now it works fine.
Resume: The diode was burned as a result of incorrect connection to line input. The owner of the unit haven't seen that a volume level was at maximum. The connection of line input overloaded the maximum current capacity of the diode and it was blown. As for it, I've seen that in that circuit in reality must be used a stabilization chip, that is not so cheap like a diode. I think it's a constructor's error to change the chip, that is overload protected, to a simple diode.
Waiting that my info will be useful because it´s a most vulnerable part of JVC CA-FSX3. And don't overload the amplifier!

Sep 06, 2009 | JVC FS-X3 CD Shelf System

1 Answer

Basslink remote volume control not working.


The only replacement for that knob is an inline RCA pot. Its not as good but will get the job done. If your rj11 is bad, most shops will have plenty spares, call around...

Jul 05, 2009 | Infinity BASSLINK Car Subwoofer

1 Answer

HI-Fi Amp Issues


Hi,
I'd love to have more information to go on, but I can give you a few things to check:
If there is a traditional volume control that is motorized, you will see the volume knob start moving on its own after you start it up. If that is the case, you'll need to have someone look at the motor control circuit. Luckily these are almost so generic that parts would be as common as replacing fuses.
If there is a volume knob that is an encoder, it may be faulty. How to tell if it is an encoder? Easy. If it will spin continuously with no extra effort, in both directions, it is an encoder. If in fact there is an encoder present underneath the knob, and the amp is responding to the remote correctly, it may be as simple as someone replacing the encoder.
If there is no volume knob at all, just a couple buttons to press, one for up, one for down, there are issues in that circuit that will need to be addressed.
If the volume control is only from the remote, and it keeps climbing on its own until you turn it down, there is a digital volume control chip that controls the volume. Unfortunately, anything in the circuit from that chip itself, all the way back to the sensor for the remote, could be faulty.
HOWEVER, do not despair yet, there may be another area to check. Turn the amp on, then IMMEDIATELY take the batteries out of the remote. If the volume stops climbing right there and then, guess what? :) Time for a new remote, or have someone take a look at the one you have if it is an expensive unit. One more related thing to check: If there are any other remotes in the room, remove them, or any other possible sources of infrared light. Alternately, take a piece of heavy black electrical tape and cover the sensor for the remote, and turn the amp on. If it behaves normally, something else in the room is "telling" the amp to increase volume. If any of these tests produce results no different from what you've experienced so far, the fault is in fact inside the amp.

Sep 25, 2008 | Audio Players & Recorders

1 Answer

Sound


hi, ya, someimes the POT i.e the volume controller variable resistor loses its contacts with the carbon strip. tru using some switch cleaning solution( NoN Acidic) to clean the POT,let me know

Dec 07, 2006 | Yamaha GX-70 CD Shelf System

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