Looses all preset radio stations when power turned off.

To preset a channel on the JCR-425, you tune in the channel; press the "AL/MEM" button on top of the radio (at which time you will probably be switched to some other radio frequency, which is rather disconcerting), press the "Up" or "Down" button to select the desired preset channel number, press "Set" -- and only then are you returned to your desired radio station. If you want to preset several channels,
You might then think that the next time you turn on the radio that all you would have to do is press one of the 10 preset channel buttons on the front of the radio to visit one of your preset radio stations. You would be wrong. You must turn on the radio, then press the "AL/MEM" button on top of the radio. Only then can you access your preset radio stations.
You might also think that to turn on the radio you would press a button that says "Power." Wrong. You press a button that says "Radio." Well, okay. But you might think that to turn it off, you would just press the "Radio" button again. Wrong. If you have pressed the "AL/MEM" button to access your preprogrammed channels, pressing the "Radio" button simply takes you out of the "AL/MEM" function and back to the "FM" (or "AM") function, apparently taking you back to the last radio station you tuned in manually. To turn off the radio after accessing a preset channel, you must press "Radio" twice.

To preset a channel on the JCR-425, you tune in the channel; press the "AL/MEM" button on top of the radio (at which time you will probably be switched to some other radio frequency, which is rather disconcerting), press the "Up" or "Down" button to select the desired preset channel number, press "Set" -- and only then are you returned to your desired radio station. If you want to preset several channels,
You might then think that the next time you turn on the radio that all you would have to do is press one of the 10 preset channel buttons on the front of the radio to visit one of your preset radio stations. You would be wrong. You must turn on the radio, then press the "AL/MEM" button on top of the radio. Only then can you access your preset radio stations.
You might also think that to turn on the radio you would press a button that says "Power." Wrong. You press a button that says "Radio." Well, okay. But you might think that to turn it off, you would just press the "Radio" button again. Wrong. If you have pressed the "AL/MEM" button to access your preprogrammed channels, pressing the "Radio" button simply takes you out of the "AL/MEM" function and back to the "FM" (or "AM") function, apparently taking you back to the last radio station you tuned in manually. To turn off the radio after accessing a preset channel, you must press "Radio" twice.

Did you put an aftermarket radio in the car? If so, it sounds like the yellow wire is not going to a constant power source. The yellow wire needs to go to a source that still has 12v when the key is turned off to retain memory for the clock and presets.

There a two power wires to the radio, one to power the radio (which appears to be working) and a second to keep the programming (which does not appear to be working). Check that all the fuses are good (there is probably one for the memory).

On the driver side fuse box, you have 5 larger fuses.

You have rows of 9 fuses across. In these rows, the far right fuse in the 3rd row down is the radio cluster fuse. This should be a constant on fuse that provides power to the clock and keeps power for the memory preset stations. The next to last fuse in the 4th row down is the radio fuse. This one looses power when the key is turned off.

I hope this helps. God Bless.

if the unit only looses radio station presets then there is a defect with the unit. if the unit looses all its memory, (clock, stations, settings) then there is an issues with your aux power. basically you have the main power connect properly so it turns on the unit while the cars is on but the aux power keeps those settings.

Sounds as if you have power wire hooked up wrong. Should be 2 power wires. Probably a red one witch should be connected to Ignition on only power source, This your main power. Should have a yellow wire, which is memory backup which should be connected a constant power source In othe words hot all the time even with ignition off. You can use a test light to test power points.

PRESET RADIO STATIONS
1 press RADIO BAND. AUTO PRESET to select the band.
2 Hold down RADIO BAND > AUTO PRESET for 2 seconds until "AUTO"flashes in the display
3 Press DSPL/ENT/MEM. The stations are stored in the memory from the lower frequencies to the higher ones.

if a station can not be preset automatically.
you need to preset a station manually.
1 press RADIO BAND. AUTO PRESET to select the band.
2 tune int he station you want.
3 hold down DSPL/ENT/MEM. for 2 seconds until the preset number flashes in the display.
4 press PRESET + or - until the preset number you watn for the station flashes in the display.
5 press DSPL/ENT/MEM. The new station replaces any old one.

TIP the preset radio stations remain in memory even when all power is disconnected.

manual available at sony
http://www.docs.sony.com/release/CFDF10.pdf

This might help to find a nd fix the problem.

http://www.modifiedlife.com/2002-chevrolet-suburban-car-stereo-radio-wiring-diagram/

Many devices utilize a small battery for system memory purposes, such as radio station presets. It draws a small continuous current for that purpose. If your system used to keep the presets when disconnected, then I would guess that?s the case. Search for a small battery compartment in the back of the system, take out the battery and take it with you to be replaced with one just like it. If that doesn't fix it, then i hope you're still under warranty, otherwise either you'll have to live with it or take it to a repair shop. Good luck!