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