Question about JVC RV-B99GY Cassette Boombox

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Model rv-b99 loses presets and does not power off

Jvc model rv-b99 loses presets when powered down. Have put new batteries for the memory to no help. and does not power off correctly.

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Whenever I run into a memory issue with a portible unit that uses a battery backup I have found battery corrotion on the battery cointacts! also remove the main power source the batteries the wall plug and let it set for several minutes and hit the power switch a few times then retry everything again
Larry(techman)

Posted on May 14, 2010

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Posted on Jan 02, 2017

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1 Answer

My JVC KW-AV60BT keeps powering off and then restarting sporadically. Both using satellite radio and USB. I don't lose presets or settings, so I don't think I am losing total power to the unit


Don,

That actually makes sense. Mine has been running fine at low power and restarts after really cranking it after a couple of minutes. I will probably go ahead and run a line to the battery as well. Thanks for commenting back, I appreciate it!

Jun 19, 2012 | JVC KW-AV60BT

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The memory on my new jvc car stereo model kd-s17 does noty work whenever i turn the key off then on i have to reset the clock and presets all of my wires are connected


need to check the yellow constant power wire on wire harness to see

1. connected to battery with constant 12 volts
2. if wire has power 12 volts

if no power check fuses to see if blown

with out this wire working right you will never have pre set station on radio or clock
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Yamaha RV-V2200 without power loses settings under 24 hours


It could be a battery, a bit like the type you get in watches. But I reckon it's a memory retention capacitor that has failed. These are small looking things that look like electrolytic capacitors that have been squashed from above. They appear to have a working voltage of around 5.5 volts too. I am enclosing a picture of one, though it could vary in style. You might find it near the main display of the unit.


memory cap-ktgjxfmx1nzpgrd54qfptmsf-1-1.jpg

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Jvc rv-b99 cassette door jammed


You need to take the unit apart. If you pull hard to open the door, you`ll break the plastic connector that moves the head up and down.

Apr 02, 2009 | JVC RV-B99GY Cassette Boombox

1 Answer

Jvc rv-dp100 boom box


tune into the station you want as normal. Then on the remote, press & hold the number key for the preset number you want. This will flash in the display to show you it's set. You can preset 30 FM & 15 AM stations.

Sep 17, 2008 | JVC RV-DP100 Cassette/CD Boombox

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Radio station presets


Look in the back of the boombox where the large D-cell batteries are. Beneath the large batteries there is a location for smaller AA size batteries. The AA size batteries are used to maintain the radio station pre-sets when the unit is unplugged. Check to see that these batteries are installed or if they need to be replaced with new ones.

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Cl500 cd tv radio unit


if you dont want to buy a new radio install a toggle switch to both of the power wires. you will keep losing your presets btu at least it wont run your battery down.

Jun 10, 2008 | JVC KD-LH7R CD Player

2 Answers

Station Preset Memory Lost When Power Off


Have same unit, exactly the same problem: station presets lose setting when power is off. I've opened the unit; there is no apparent battery of any kind.

As long as the unit is powered up, the station pre-sets seem to hold. There IS a capacitor across the power switch. Some A/C will therefore be transmitted into the unit when plugged in, even with the switch off. If the capacitor is open, no charge will enter the unit when the power switch is open. I will probably replace this capacitor and see if that fixes things, but it may take several days to do so. Has anyone else tried this?

Feb 02, 2007 | Kenwood KR-A5080 Receiver

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