REVISIT - SONY Discman D-EJ715 - Is it a Faulty LASER????? 

Hi Vince I has reverse engineer that sony laser assembly, i found out that variable resistor is use in voltage divider circuit, witch mean the lower the resistance, the lower the voltage is. So to increase the laser brightness it need to increase the resistance. I'm also found out that there is a mirror underneath the lens. If there is a dust on that mirror, the leser won't read the disk. You can try clean it by blow some air on it, you need to remove plastic bracket from that laser module in order to do it.

I realized I love more these “trying to fix” videos than some movies 😂

its always satisfying to come back to faulty stuff and this time fixing it for good

The Lightbulb moment was funny!! At the time i was thinking huh did i miss something!?!? 😂

I watched all your videos, you did great work, congratulations 👏🏻👏🏻👏🏻👏🏻

Love these discman videos, hope you have more planned from that job lot!

Vince we need merch so much.. Anything to support you and your great channel

I love the music in this video, it always reminds me of the music from the Alton Towers Nemesis commercials in the 90s

LOVE your videos!!!!Keep them coming. I learn a lot from them.

Awsome work!

Awesome video

Vince I always enjoy your videos! I do not know how to feel about these short ones though! lol

Hey Vince loving the content keep up the great work.

very nice video :-) The lazer try to read the inner part of the disk if it doesn't see the disk info it will stop trying after a few attempts

I just picked up this unit for 3 bucks, it kept stopping at the same point of every disc I used. Greased the tracks and cleaned the laser and now it’s good as new!

Great piece of now old tech ... I lived a few good years plugged into one of those ... I went full circle in my adulthood and went vinyl again in my music appetite

SPOILER ALERT 5:50 Vince makes a confession: he hates Jedward, in the most passive-aggressive way possible. Hahahahahahahahahahaha

The Jedward cd probably sounds better in the none-working unit .

Put a disc upside down in the working one and it should make the same skipping sound as the one with the faulty laser.

awesome video!

Love me a revisit vid... vince we need merch 👍👍

Glad you were right, but you need to get out more :)

Well done Vince ... tenacious fault finding! Thx for sharing!

My brother had CD player would not play most disks cleaned laser with nizerol anti dandruff shampoo and it working perfectly

Hi Vince, regarding the laser. I remembered you put the solder blob on the ribbon cable, but I can't remember if you removed it. If not, this surely would prevent the laser from working so maybe something to check?!

Laser diodes do die (or get tired) , and they are just like a plain old light emitting diodes (LED), Current dependent devices.

L.a.s.e.r = light amplifier stimulating emission radiation treatments. lasers are kinda like a light bulb, they emit light and burn out.

When you put the bad laser into good player, do a callibration, (If laser have any light) it will work fine in both players after callibration. Now you know that both PCB's are OK.

Great job Vince =D One thing that has surprised me watching this part - see at the end the laser unit vibrates side to side using the tracking coils I think. I've never seen that in another drive before. Normally they bob up and down and repeat the cycle after a small pause - around 3 times. I think that Sony drive is doing something clever, I think its vibrating the head crazily like that incase there's dust on it. At least thats my theory, because the crazy shake like that isn't it attempting to just track etc.

Vince - well done for your tenacity in re-visiting this one to work out exactly the issue. Have you tried tweaking that laser adjust pot to different places whilst looking at how bright the red dot goes? - stick a bit of greaseproof paper over the lens to see the laser dot without risking your eyes. You may as well try turning it to max even if it blows the laser diode just to see if you can get it to read at all. Great work.

AAAAAAAAH! You lazed my eye!

Silly question...have you tried taking the laser sled out and reassembling the rest of the laser/motor unit and see if the motor spins continuously(because there's no laser sled) or if it stops after a set amount of time? (haven't finished this video yet)

At 7:25 isn't that a microswitch at the end of the worm gear touching the white cog?

You killed the laser last time when you hooked up the motor wire and laser wire. I had mentioned this in the comments. The initial fix of the tracks was the problem. You accidentally created another. Lessons we learn. Well done.

theres that many of them same lasers in many of sony cd players

most of cd walkman faulty with laser controller... so .uts hard to find replacement.. i have 2 sony walkman with faulty laser controller

vince didn't your mom ever tell you not to point a laser at thousands of peoples eyes? GJ on the fault finding nice to see that your repair works with the good laser.

On some pick-ups you can increase the voltage to the laser. Not a long term fix but can get some more use from it

4:23 brilliant!!!

Problem is Jedward but not the problem with the discman

Much Love from Australia brother hope all are doing well in the United kingdom

Naughty naughty copied disc 🚨😜

Well that's unfortunate, but solved. I would couple the working laser and shell without scratch with the non-damaged board, so it's as original as possible. The rest are spares.

I’ve repaired many CD players years ago, Aiwa 5-6 disc players to Kenwood, Denon cd players even car multi disc players. Commonly had more mechanical failures with plastic arms and sliders breaking off, motors stuck, belts worn broken with them.. I think you should fix one of them more interesting as you like fixing watches this would be good.. No point messing with a laser if A. You cleaned it greased the slider bar then B. try turning the gain up... Also who said these have a microswitch?? Hello this is a laser Diode with a photoCell Diode... the laser is trying to find a position to read the CD with the photo cell in order to find its position by default the motherboard is moving the laser back and forth because the laser is blind......

As a viewer, knowing what the fault is is adequate enough. We may now put this case to rest. 👨‍⚖️

If that rod dries up it won't slide properly

Red light was feint because you blew the laser diode with incorrect voltage

i shall be first.

Lazer not laser lol 😁

Day #1019 of hoping Vince sets up a Patreon account