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Hello! Welcome to NP Hacker!
You know, I have this stereo here, which has some nice features.
It's really old and has CD and cassette, although it's somewhat broken.
It has radio, but the antenna is also broken.
What can we use this for? We can listen to CD, yes-
-but we can not listen to our MP3 collection.
So what can we do to that? Let's hack - With NP
To start you must open the player up.
This screw seems to be pretty easy.
Sorry, I was screwing in the wrong direction.
Place the screw somewhere safe.
And go to the next one.
Here we'll also find a screw...
...and on the other side as well.
There's some screw left, but my screwdriver isn't long enough.
This screw hole is too small for my screwdriver to fit-
-so I won't get those screws out.
You should not unscrew the screw under the antenna.
That's just holding the antenna in place and will not help you open the stereo.
As we still have these screws holding it together-
-we must use some force to get it open.
I use these multi tools to crack it open. I have already opened it up once-
-so it's pretty easy, but the first time you really have to use much force.
It might look a little bad afterward, but that's the price you'll have to pay-
-to make it able to play MP3s.
Now it's almost opened up.
Is there still something in the way?
I found the last screw, it's on the bottom side of the stereo.
A little more screwing.
Here we have the thing. Let's take a look on what we'll find inside.
First we have to locate the CD player. Directly below it we'll find something interesting.
This is the audio cable transmitting audio from the CD player to the mainboard.
We want to take lose the audio cable from the CD player.
You have to cut it lose.
Then I have prepared something.
You should find a pair of headphones you don't care too much about.
You are going to cut off the earplugs, leaving you with a cable-
-with a 3.5mm plug in one end and nothing in the other end.
Let's see what I've done here. I have taken this old earphone-
-with an 3.5mm stereo plug and cut the earplug off.
Then I should solder it together with the cable I took lose from the CD player.
Let's see how to solder this thing!
Here's the cables you are going to have. On the bottom we have the earphone-cable.
On the upper side we have the cable I took lose from the CD player.
Here we have a blue cable which is going to a white cable on the CD player.
We have a red cable here which should go to the red cable on the earphone.
Then we have ground on both of the earphone-cables.
The ground is just bare metal without any colored plastic on it.
That should go to the ground on the earphone-cable,which is also bare metal.
I hope that made sense.
Before we start to solder anything I'm going to take lose the plug here.
On this particular stereo I actually can take the contact lose.
That will make the soldering much easier.
Here we see it much easier.
On the bottom we have the earphone-cable. I have actually soldered some cables.
Ground to ground: uncolored with uncolored. Blue earphone-cable with white cable on stereo.
The red one should go to the red one on the earphone.
Last we have the ground for the other cable.
We have ground in both of the cables coming from the earphone.
We're going to connect the ground from both of these cables-
-to the same ground on the CD player. That's why I have split them up.
First I take off the insulation off the cable I'm going to solder.
This is the cable going to the stereo plug.
To the left is the red cable which is going to the other red cable.
The ground - which is just metal - is going to the other metal cable here.
Now, let's start soldering!
I recommend that you tape the cable. That will make the soldering easier.
Let's see if the iron is heated.
Perfect!
Now we can move on to the ground.
Now I'm done soldering all the wires.
Make sure the wires aren't touching each other. What would make a short-circuit.
Now it's almost done.
I will plug in the power cord.
As we connected the cable to CD, we'll put it to CD.
Let's find some MP3 songs.
Off course it shouldn't work.
I know why it's not working! The cable is just ending here.
Do you remember this one that we plugged out to make the soldering easier.
Make sure no cables are touching each other.
Turn the power on---
...and we got sound!
It's working really awesome!
To the tunes of Nyan Cat we'll put some electrical tape on the cables-
-to make sure they don't touch each other.
That will make a short-circuit and nothing would work.
However it won't destroy anything so don't worry about that.
But you have to open it up again if it get's short-circuited.
You heard that? I actually short-circuited it somewhat.
The sound became a little weaker for a second.
Try to insulate them from each other.
Insulate all of them.
Now I got some tape on the cables.
Then I made a hole where the cables can come out.
Then I have to tape it so it won't get destructed or something.
Let's close the casing.
It will be perfect!
I think it's done! Let's play a song.
First I have to plug in the mains cable.
Put it to CD, and the light will lit up.
Here's the Dynamic Bass Boost, which is currently enabled.
Let's find some songs.
It's really good sound quality. Think about it's probably 10 years old.