Minidisc player/tuner NOT remembering saved stations

[friko]

Hello,

I've just bought a car and it came with a Sony Minidisc player MDX-C7900. Everything works well except when I try getting my saved stations. I was told that it could be a wiring problem which is causing the loss of all saved memory once I turn off my car. I have no idea where to start looking. Help

Thanks

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[mgaidica 10+ year member]

there should be a constant 12v wire, and an accesory/ignition 12v wire. The constant 12v wire will be used for applications such as memory etc, and the switched (ignition/accesory) will be used for main power. Check the wiring diagram for the unit and then check your wiring, most likely you switched them or something of that nature. Let us/me know when you figure it out. Good luck.

-Matt

 

[friko]

Thanks. I don't have the installation instructions, only managed to download the manual from Sony's site. I guess I'll have to remove the unit and see how it's plugged behind. Do you know where the power cables lead to?

 

[omnipseudo 10+ year member]

Shouldnt matter where the wires end up. If its sony, pull the deck out. You'll see a set of wires coming from the back of the player, and then after about 8 inches of wire, should be where the 2 sets of wires (from the deck and from the car) meet. all these wires will be crimped together. On sony, Red = ignition switch and Yellow = battery memory. Make sure your battery mem is to the battery mem on the car. and vice versa. they're prolly just mixed up

 

[mgaidica 10+ year member]

Also, if you get confused, you can use a multimeter to trouble shoot... If your not familiar with one, let me know, I could help you out... My email is matt@mfgcustoms.com, feel free to give me an email if you get stuck. C'ya...

-Matt

 

[friko]

Hello

I've checked the wiring. The Yellow and Red seem to be ok - I think.

I'm enclosing some pictures.

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[mgaidica 10+ year member]

I'de say check the voltage on both the yellow and red wire in your cars "off" possition, then your accesory/ignition possition- just to make sure. Otherwise, it could just be a setting, maybe try contacting the company? Good luck...

 

[omnipseudo 10+ year member]

Set the clock on the player, then turn off the car for a while. Turn it back on, if the clock resets, then you have a wiring memory problem. If it doesnt, its some 'feature' that you're missing or messing up on while programming it.

To check your wiring, you can either use a multimeter ( you can find an analog one at walmart for 10 bucks, or a nicer digital one for around 20 ) and check the 2 wires with the car on and off...Or simply take the 2 wires out of the crimps, and seperate them, then touch the yellow to yellow, should be a spark cuz its the constant battery...If there's not thats your problem. Try the same with the red. Just be careful, and make sure the ground is attached!