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CD Player Function not working
on April 16, 2014
After installation, everything appeared to work except CD Player function. When inserting CD, unit would draw in the CD, then appear to loose power (all lighting on display would flash off for a couple of seconds before restoring). Contacted JVC techs who determined unit was defective. Ordered replacement which exhibited the same identical strange problem. Contacted JVC again who stated that I must have received another defective unit (even though they showed no history of this type of issue). Finding it too hard to accept that I had gotten two units in a row with the same identical problem, I proceeded to troubleshoot as a power issue. Turned out to be the fuse size for the MEMORY lead(yellow) was too small. This lead was fused at 0.5 amps for older radio that this one was to replace. This should have been more than sufficient to keep the memory active (clock time, presets,etc) when turning off the ignition. I contacted JVC again to let them know what I had found and to find out what the recommended fuse sizes were for the main ignition power lead and for this memory backup lead since they were not given in the manual. Neither the person contacted nor their 2nd level support could tell me or admitted to be able to find out from anyone within their company. They said a professional installer would know had I used one. I could not convince them that no one but the manufacturer of the unit could possibly know that information and they should be the ones to supply it. I never cease to be amazed by the lack of basic knowledge and common sense that people have these days.
Long story short, I replaced the 0.5 amp fuse with a 3.0 amp (still small enough to protect existing wiring) and everything works as it should. Even though JVC verified that the MEMORY lead should only be supplying power to keep memory active, it obviously serves some function for the CD player as well. If you happen to purchase this unit and exhibit similar issues, check fuse sizes. But don't depend on JVC "techs" to be very knowledgeable.