Question about Sony CDX-M770 CD Player

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Speaker issues Ok I hooked up this stereo and everything was fine until I put in a CD and then it only played out of two speakers went back to radio all 4 worked cd only gets two i am at a loss.

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Re: speaker issues

Disconnect whatever wire is connected to the blue wire behind your head unit. Re-connect it to the blue/white wire, instead.

Posted on Jun 21, 2007

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New Alpine radio, went through setup, plays fine on radio/tuner on all four speakers, but ipod (USB port) or internal CD only plays on front speakers.

Just a thought - the usb provides a digital signal which carries information about how the signal is to be processed; mono, stereo, surround sound stereo, etc.
If the mp3 music file was only recorded in 2 speaker stereo perhaps that is how it plays back.

Admittedly the radio signal is stereo and yet it plays on four speakers but unless it is a DAB radio it is analogue and maybe that makes a difference.

Perhaps there is an internal electronic fault with the digital processing part of the unit. I suggest reading the handbook again and then perhaps contacting the seller.

Mar 28, 2016 | Alpine Car Audio Receivers

1 Answer

Hi, I just got a new stereo for my Ford f150 truck and I had it all put in and working until I noticed that when I turn on my pickup and the stereo has me set the settings the way I want them so I set the...

Well, I don't know what exactly you had hooked up but, the yellow wire from the Pioneer connects to the vehicle battery wire(light green) behind the radio, the red wire goes to the vehicle's accessory wire(yellow/black).There doesn't seem to a ground wire listed for this vehicle behind the radio so, you have to ground the radio to chassis (some metal behind the radio).
This should handle your power issue.

LF speaker(+) green
LF speaker(-) Black/white
RF speaker(+) white/red
RF speaker(-) black/white

Sep 21, 2012 | Car Audio Receivers

1 Answer

My cd player lights up but doesn't play any music

Do you have your speakers hooked up? If you are listening to the radio do you have an antenna hooked up? If your stereo has power then check the wiring to your speakers.
Regards, Tony


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On playing a store bought cd, left front speaker doesn't play, but right front does, currently there are no rear speakers all wires are connected through the wire adapters to hook directly up to the...

if its working with the radio the fault must be the cd part of the radio hence take it back after testing different cds, home made cds may not be compitable with unit

Jan 02, 2010 | Alpine CDA-9856 CD Player

2 Answers

Location of reset on unit

when you disconnect it from cables, it resets. But i believe that is not the problem. Check speaker cables. I think you have problem with internal power amps. They have thermal and current protection. look for short circuits on speakers or speaker cables.

May 30, 2009 | Sony CDX-GT500 CD Player

1 Answer

I need to hook up cd player

something i found today on google. hope it helps.

Car Radio Battery Constant 12v+ Wire: Green/Yellow

Car Radio Accessory Switched 12v+ Wire: Yellow/Black

Car Radio Ground Wire: Chassis
Car Radio Illumination Wire: Blue/Red
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 5 1/4′
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): Orange/Green

Left Front Speaker Negative Wire (-): Black/White

Right Front Speaker Positive Wire (+): White/Green

Right Front Speaker Negative Wire (-): Black/White

Car Audio Rear Speakers Size: 6′ x 9′

Car Audio Rear Speakers Location: Rear Deck
Left Rear Speaker Positive Wire (+): Pink/Green
Left Rear Speaker Negative Wire (-): Pink/Blue
Right Rear Speaker Positive Wire (+): Pink/Blue
Right Rear Speaker Negative Wire (-): Green/Orange

May 09, 2009 | Sony CDX-CA400 CD Player

1 Answer

No sound from cd but stereo works no problem

there are 2 blue wires........dont hook the blue to blue!!!!!!!!!!!!!!!!!!!!!! hook blue to the blue/white wire!!!!!!!!!!! problem solved. so e-z huh? lol i did the same thing.

Feb 16, 2009 | Sony CDX-CA700X CD Player

1 Answer

Problems with amp or stereo

check out
this site has your stereo's wire diagram.

The amp wires only go to the rear output (rca jacks on back of cd player)
It wont work right if it is connected to the front outputs on the back of cd player

Jan 16, 2009 | Alpine CDA-9856 CD Player

1 Answer

Plays radio not cds

You may have Power antenna and amp remote turn on wires switched. Your system may be looking for turn on signal from radio and only gets it when am or fm is on because power antenna wire is hooked up instead of amp turn on signal.

Jan 18, 2008 | Kenwood Sirius KDC-MP522 CD Player

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