repairing a dvd player (just for learning)

bigpanda · 26th November 2006, 02:16 AM

I had 2 dvd players that are unable to load the disc lying around. They are cheap and are by no commerical value to repair them but I still would like to give a try, just for some learning and training.

These player are not able to recognize the disc loaded into them : 'no disc' error, and I have heard someone said that the 'lens' are deteriorating. Any suggestion that I might give it a 2nd chance?

Tks

Jezz-the-Fezz · 26th November 2006, 03:18 AM

Don't take this the wrong way, but have you tried cleaning the lenses in question? bit of alcohol on a cotton bud. 'Ya never know unless you try...

audio3000 · 26th November 2006, 05:07 AM

Hi Big Panda,

See if this link is worth anything to you.

http://www.repairfaq.org/sam/cdfaq.htm

bigpanda · 26th November 2006, 05:28 AM

Jezz-the-Fezz,

Tks Jezz, I did that before I post. Does the speed of rotation of the discs matters?

audio3000

Sure that web site is excellent. I'll start reading the details

rejithcv · 26th November 2006, 05:28 AM

A lot of drives suffer this problem which is mainly due to allignment problem. The lens lack allignment somehow. Since they are alligned precisely by machines in nano scale, it is quite hard or almost impossible to allign them back to pefection. Yet in case of dust, you can try cleaning them with a soft cotton with some cleaing sol. Make sure the allignment is not changed during this process.I have a dozen of drives in my show case, all of which has the allignment problem.

bigpanda · 26th November 2006, 09:22 AM

I was just starting to worried about this alignment thing that rejithcv brought up. I can still remember the old days when I tried to change the read/write head of a cassette deck. I know that I had to do some alignment with the lens but never thought that it could be that serious. Then this would mean a 'NO' in trying to repair the drive, wouldn't it.?

rabbitz · 26th November 2006, 11:44 AM

If it's a Sony DVD you can align the laser in the service menu by using the auto alignment. Manual alignment is also available but best left alone.

In standby press remote buttons in this order: Title, Clear, Power and you're in. A lot of times you have to do the auto alignment a few times as it bombs and must get closer after each try.

If the laser is dead or way out, nothing is going to help.

QSerraTico_Tico · 4th December 2006, 05:32 AM

A taken apart laser unit cannot be repaired!

26th November 2006, 02:16 AM	#1
bigpanda diyAudio Member Join Date: Jun 2004 Location: HKSAR	repairing a dvd player (just for learning) I had 2 dvd players that are unable to load the disc lying around. They are cheap and are by no commerical value to repair them but I still would like to give a try, just for some learning and training. These player are not able to recognize the disc loaded into them : 'no disc' error, and I have heard someone said that the 'lens' are deteriorating. Any suggestion that I might give it a 2nd chance? Tks

26th November 2006, 03:18 AM	#2
Jezz-the-Fezz diyAudio Member Join Date: Nov 2005 Location: Bolton, UK	Don't take this the wrong way, but have you tried cleaning the lenses in question? bit of alcohol on a cotton bud. 'Ya never know unless you try... __________________ Idlers ROCK!

26th November 2006, 11:44 AM	#7
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	If it's a Sony DVD you can align the laser in the service menu by using the auto alignment. Manual alignment is also available but best left alone. In standby press remote buttons in this order: Title, Clear, Power and you're in. A lot of times you have to do the auto alignment a few times as it bombs and must get closer after each try. If the laser is dead or way out, nothing is going to help. __________________ No longer DIY active

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26th November 2006, 05:07 AM	#3
audio3000 diyAudio Member Join Date: Jun 2005 Location: Canada	Hi Big Panda, See if this link is worth anything to you. http://www.repairfaq.org/sam/cdfaq.htm

26th November 2006, 05:28 AM	#4
bigpanda diyAudio Member Join Date: Jun 2004 Location: HKSAR	Jezz-the-Fezz, Tks Jezz, I did that before I post. Does the speed of rotation of the discs matters? audio3000 Sure that web site is excellent. I'll start reading the details

26th November 2006, 05:28 AM	#5
rejithcv diyAudio Member Join Date: Oct 2006	A lot of drives suffer this problem which is mainly due to allignment problem. The lens lack allignment somehow. Since they are alligned precisely by machines in nano scale, it is quite hard or almost impossible to allign them back to pefection. Yet in case of dust, you can try cleaning them with a soft cotton with some cleaing sol. Make sure the allignment is not changed during this process.I have a dozen of drives in my show case, all of which has the allignment problem.

26th November 2006, 09:22 AM	#6
bigpanda diyAudio Member Join Date: Jun 2004 Location: HKSAR	I was just starting to worried about this alignment thing that rejithcv brought up. I can still remember the old days when I tried to change the read/write head of a cassette deck. I know that I had to do some alignment with the lens but never thought that it could be that serious. Then this would mean a 'NO' in trying to repair the drive, wouldn't it.?

4th December 2006, 05:32 AM	#8
QSerraTico_Tico diyAudio Member Join Date: Oct 2004	A taken apart laser unit cannot be repaired!

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