How to Fix CD or DVD Player No Disc Error - won't play cd - YouTube

So I was given this Philips

unit it's a

low-cost

Home theater set up from years ago

They gave it to me somebody gave it to me for either get it working or parts or something

It sat around and I needed a radio for the shop. I thought well, maybe I can get this working

but since it sat around and had some

Some mildew on the board and it wouldn't really fire up the controls in the front didnt work. The display didnt work

So I put a little bit too much work into it to get it working

hello behold after I got everything going the

Dvd/cd drive now doesn't work which is pretty common for an old CD player

So if you have an old CD player, that just doesn't read discs anymore

I am going to show you how hopefully how to possibly get it to work. So you'll see it'll be something like this

That's another problem is the mechanism is now jammed

Which I also have to fix

It's a rabbit hole

Yes, it doesn't even try so

That is what we're going to try to fix

Ok closer. Look

It's good to know what you you're looking at. This is just the main board. It's got the amplifier

It's all the logic stuff. This is the sound chip

Obviously the disk drive

This is the power supply you want to stay away from this generally you want to discharge all the capacitors which are these things?

For this you're gonna be staying away from it

so it should be okay and they have this whole protective thing over top of it and make sure it's

unplugged

So what I did and every CD player every DVD player is gonna be different

But for this one just give me more room. I open the drawer and then pull the plug

So that gives me more room. This won't be in the way

And that way I don't have to disassemble the whole thing to take the drawer out

First thing to do is

Clean the laser. All you need is a clean q-tip. You don't need to wet it and you just gently clean it

I've done this already. I know this doesn't work for mine. It's clean, but

You can then put a disc in and see if that fixes the problem

If so button it up you're done, but I know that's not the case here. Let's

Turn it around on the back of the laser or on the back of the reader

Back here. Now you're gonna notice there's this little

Excuse little ribbon cable

Take these little clips

And pull that other way is kind of fragile, so just be careful again this is unplugged

And that gets that out of the way

Okay, and on the back of the board, you'll notice there's these two little trimmer pots

these little guys

adjust the amount of current going to the laser diode the way they have a set up is one is for

The DVD portion and one is for the CD portion. So what there's two things you can do

one

You get a multimeter, there are

Two posts on the bottom of each and a post in the middle you put the multimeter in ohms

Measure from the top and the bottom, right?

That way you establish what it was set at originally and you turn it clockwise very slightly and

Then try it again

If you don't have a multimeter you can do it the I guess you could say the redneck way and

That is get a fine sharpie and draw a line on it

Problem is these things are very really tiny. So

Makes it really difficult. That's what we're gonna try to do

The thing is if you go too far you're gonna burn it out

And the reason for doing this is a as a reference point can be if you ever have to get back to the way it

was stock

That's your record

But the thing is it doesn't work as it is so if you burn it out who cares!!

It's way too soon I gotta find a screwdriver to fit that

Now if you can find a screwdriver small enough you can use that to make the adjustment. Otherwise, I'm just going to use a

Just a small blade it's largely but it has a pretty fine tip

Just put it there you can feel where it wraps

My fingers, I believe so you can see and you're just going to turn it

I mean it's going to be just a hair. You're not even going to barely feel the turn just

Want to go in small increments and test it out to see if it works

You don't want to go too far because you don't want to put too much current through the laser diode

If you do ,you could possibly burn it out

These are already set at the factory

Usually close to or at the limit of the laser diode. So you're actually going to be pushing it beyond its limits

umm...Again I don't have the limits for what's actually in here

I don't have the specs for this board where the actual diode I haven't pulled it out to look but that's my guess

Over time they the output diminishes so you can

Push it a little bit harder to get some more life out of it. So I'm just going to turn this

To grab and I'm not even sure if you can see this on camera

I'm gonna turn them both just a little bit and

Take

Routing cable

I'm going to be putting back in here

Lock this in place just by pushing that closed

Or so that you could

See if it works

You know its loading ,it actually didn't do that last time there you go fixed

This is just YouTube music so the charity monetization or anything

So it's an easy fix, so if you have an old CD player DVD player

maybe fix would buy you some more time