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My JVC RV-B90 Boombox was plugged in and working great, now it will not power on. I checked the fuses and all are ok. What else could it be? How can I check the power supply to determine if it is the problem?

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Hiya i dont recommend that you try this without experience but if you want to give it a bash then great. (please keep in mind that slipping with meter probes could make things much worse and there is risk of shock) Thats my disclaim :) ... On the power board/ PC board, look for the 2 largest capacitors. The y will be PS caps. With a multi meter set to DC, test acroos one cap then the other (one at a time) There voltages should be the same in value more or less and the voltage should be around 30- 40 V. There will also be another supply of around 12V but cannot tell you where to look for that without seeing. If all fails, send me a pic and will point you in direction. Best of luck

Posted on Jul 13, 2009

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Posted on Jan 02, 2017

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1 Answer

Hello i have a jvc rv b 90 . Ive insert the casette wrong. Now i cant open the casette deck anymore.


Hello
Casette tape can be reeled to the capstan shaft and jammed. It is a tricky way to get it out. Only an experienced service technician can do this work. If you try to pull the casette hold tray out by force, it will get broken, and will turn irreparable. OK.

Oct 02, 2011 | JVC RV-B90 Boombox

1 Answer

JVC RV-B90 Boombox,How many watts in RMS and how much?


If you can believe what they say about the specs...

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/JVC-RV-B90GYJ-manual/id/316ag201/t/2/

Bear in mind the power spec is at >>>> 10% <<<< THD without any bandwidht specified. THAT's a lot of distortion stated in a meaningless fashion to convince you to part with the money.

If one looks at the power CONSUMPTION figure (43 watts), one can conclude that the audio power spec is totally fabricated. NO device puts out more power than it consumes.

That is not to say it won't sound good and loud in certain settings and conditions, but this is not, say, a Bose Acoustic Wave Music System. After a certain volume demand it will just be annoying instead of entertaining. That's why they called this class of product a Ghetto Blaster.

I see one sold for $70 last year...

http://www.propertyroom.com/ItemDetails.aspx?l=7334900

May 28, 2011 | JVC RV-B90 Boombox

1 Answer

I lost my remote control for my JVC RV B90 where to find a new one?


http://cgi.ebay.co.uk/JVC-RV-B90-Boombox-/120719242489

http://www.dvdremotecontrols.com/Mfrs/device_files.php?pageNum_modl=2&totalRows_modl=577&brand=JVC&dt=AUDIO

or Amazon

May 25, 2011 | Audio Players & Recorders

1 Answer

Hi, I would like to add a stereo input on my JVC RV-B70 for my MP3 player. Does anyone know where I can find schematics because there are none in user guide. Thank you.


hi i know it a bit late but wated you to know. to find service manual(has schamatics) google your model (JVC RV-B70 service manual) dont pay for one as i found on for free on hifimanuals.com i think. google is your friend. good luck

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yes a little groove under to big batteries. AA i think

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Cdplayer has to be exchanched


Good luck, JVC will only sell pieces not the whole player... just went through it

Jul 30, 2009 | JVC RV-B90 Boombox

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Need JVC CA-R120E in Norway


check their website and if they show this item and they will tell you where to get it or do a google search for this item.

Mar 30, 2009 | JVC RV-B90 Boombox

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Remote control


You need to resurface the contacts. Here's how you do it:
First, disassemble the remote. Clean the black foil pads on the circuit board with rubbing alcohol. Now take a #2 pencil and a razor and shave the graphite from the "lead" onto a piece of paper (hold the blade perpendicular to the lead, this results in a finer powder). Now that you have a nice pile of powdered graphite, blot a Q-Tip into it to saturate the cotton with graphite. Rub the graphite onto the little black pads on the rubber button membrane, and be sure to apply more graphite to the Q-Tip every 2 to 3 buttons. Blow off any excess graphite. reassemble remote and test.

Nov 01, 2007 | JVC RV-B90 Boombox

2 Answers

Display light out


Hello, I've had JVC RV-B90 Boombox for few yearst too, but display lighting is ok, There is just small bulb, so take it apart and just change bulg for new one. Good luck !

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