Top 20 Sony CDX-GT300 CD Player Questions & Answers

you might have a button stuck, try gently pulling the function button out a little bit. i used a sheet rock knife razor blade and was able to release it but after pressing the function button again it started all over again. good luck.

If you punch up ur model number into google search you will find the diagrams u need.

check the sub works with known good signal from different source. if that works and all settings are double checked then you might try to reset the 300 series to factory reset. try to unplug from the 110 outlet then hold the on button down while plugging it back in this should re iniatalize the unit and if it still doesn't work you may have a hardware problem

You may have tuner problem on radio circuit. Please check and get it fixed.
Regards, Jay

try checking all of your fuses. there should be a fuse box in the engine compartment and another under the dash or in a kick panel. there may also be a fuse in the back of the radio.

are you running an external amp,for speakers or are you running speakers right from head unit,if so try an external amp you may have problems with the internal amp thats why you have no sound. an external amplifier should fix your problem.you will need amp and rca cables.try to borrow one with rca cables to test .hope it was a help.

I have the manual here for you, go to page 20 out of 24 in the PDF file and it shows the pinout information for the speakers. Most likely they are connected with twist style wire connectors, if so then disconnect the ones that are not working and check the wires. You may want to re-strip them and solder them together if you are able to, that is definitely the best way to connect them, those twist style connectors are not the best. Check all those wires there that are indicated by the manual pertaining to the speakers. If it still doesn't work, you will have to pull the speakers out of the doors on the car and check the connections at the back of the speakers, on the terminals. You may want to resolder the connections just to be sure.

If it is still not working it could be the speakers themselves are bad, or the output from the CD player is bad, both are just as likely unfortunately. The only way to tell would be to take the one speaker you know for sure is working around to all 4 locations in the car and attach the positive / negative connections to see if you can get sound. You don't need to solder them at that point, just touch them to the speaker terminals while the cd player is on and playing... an you should get some sound. If you don't then either the speaker line has a break in it somewhere along the way, or the output is bad from the back of the cd player. It is very unlikely that all three locations have speaker wire problems, if all three don't work it's pretty certain this cd player unit has problems.

Here is the manual I keep referring to:

http://a248.e.akamai.net/pix.crutchfield.com/Manuals/158/158GT300.PDF

Thanks much, please reply with any questions here,

Tim

http://www.usersmanualguide.com/sony/car_audio/cdx-gt300 and click on the user manual. Or www.docs.sony.com/release/CDXGT300.pdf.
Press and hold the select button until setup display appears. Then press select button until clock-adj appears.press dspl. Use the volume control to adjust hour. Press dspl to change to minute or back to hour. Press select when done.

Check that the antenna has not become unplugged from the back of the unit.

Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.

Yes you can. You will need to get an RF adapter and connect it using the antenna or an RF adapter that send out a signal and tuen your radio with either one.

Sony head units use either a 9 pin connector, link below:
http://www.kb.sony.com/selfservice/documentLink.do?externalId=C285614
Or a 16 pin connector, link below:
http://www.kb.sony.com/selfservice/documentLink.do?externalId=C217600
And here is a kink to your installation guide.
http://www.docs.sony.com/release/CDXGT300_Installation_Guide.pdf
And your Operating Instructions.
http://www.docs.sony.com/release/CDXGT300.pdf

Screw Driver, and take off the screws on the Drive.

Go to Sony Website and you should be able to download the installation manual.

Check the fuse on the main power wire.

Make sure you have a remote turn on wire ran from the radio (blue/white wire).

Make your own ground for the amp using self taping screws....DO NOT USE SEAT BELT BOLTS

This is a link to Sony for wiring diagrams....there are 2 different plug configurations. One is the 9 pin connector.
http://www.kb.sony.com/selfservice/documentLink.do?externalId=C285614
And the second is the 16 pin connector.
http://www.kb.sony.com/selfservice/documentLink.do?externalId=C217600
Hope this assists you with your installation....if you need more info, let me know... Tim

Here is a link to owners manual for Sony CDX-GT300.
http://www.docs.sony.com/release/CDXGT300.pdf
Here is a link to installation instructions. It looks to me that there are front and rear line out RCA connectors on the back side of your head unit. (Unless, this is not the model of your head unit)
http://www.docs.sony.com/release/CDXGT300_Installation_Guide.pdf
There are devices that are capable of converting speaker level output to line level (RCA) output. I know Scoch is one brand, and here is a link to others.
http://www.electronixwarehouse.com/car/accessories/line-converters.htm
Hope this helps.

FM tuner gives sound in both channels that means amplifier is fine and CD gives one channel sound that shows problem with CD data processing (DSP, digital signal processor) chip or D/A converter chip problem.
Can you repair circuit board on component level? let me know to provide you more technical info like what to test.
Thanks.

check the fuse on your auto, to see if that is ok, the one that powers your audio system, and also check the fuse/fuses for the radio unit itself.Alternatively, the unit has died