Post by: MOE on December 31, 2002, 04:14:00 PM
Use at your own risk !
http://pages.infinit.net/cradle/XBOX_philips.PDF
Happy new year everyone ! :beer:
Post by: BenJeremy on December 31, 2002, 04:31:00 PM
This post has been edited by BenJeremy: Jan 1 2003, 12:31 AM
Post by: MOE on December 31, 2002, 04:43:00 PM
So I guess this way is better to most people, and not everybody got a multimeter.
Post by: BiCX on December 31, 2002, 03:44:00 PM
What tools will I need to do this?
Thanks a lot man!
Post by: MOE on December 31, 2002, 05:05:00 PM
Be carefull with the Pot, they are not very strong !
This post has been edited by MOE: Jan 1 2003, 01:06 AM
Post by: BiCX on December 31, 2002, 04:12:00 PM
Looks like I have to buy a Torx screwdriver
Thanks a lot for the tutorial, you the man!
Post by: HSDEMONZ on January 01, 2003, 12:59:00 AM
Post by: Mandog on January 08, 2003, 12:39:00 AM
Thanks for any help.
Mandog
Post by: qx2pow on January 08, 2003, 04:21:00 AM
Post by: zIOn.ita on January 09, 2003, 09:36:00 AM
(( tooo bad I didn't mark the original position of the pot, now when I insert any CD/DVD (even originals) the reader starts spinning and in 3-4 sec it stops. It's not loudy, but still I can't manage to make it work! Any suggestions before buying a new DVD for my X?
Post by: MOE on January 09, 2003, 08:26:00 PM
MARK THE ORIGINAL POSITION OF THE POT !
And remember to turn the pot little by little and test reading of your media at each movement...
I will try to post the right ohmage in the next days to hopefully help you to get your phillips up and running.
Post by: zIOn.ita on January 09, 2003, 10:26:00 PM
if you can help us you're great Moe, but we can't blame you for our errors Hope I'll fix it or I start looking for a Pioneer at local stores....
Post by: ZildjianKX on January 09, 2003, 10:51:00 PM
| QUOTE (BiCX @ Dec 31 2002, 03:12 PM) |
| Cool Looks like I have to buy a Torx screwdriver |
How have you opened your xbox then? If you haven't, you shouldn't be doing this, lol.
Post by: cheffe76 on January 10, 2003, 05:11:00 AM
Has somebody an explantion for the behavior?
The drive seems not to be damaged, because it´s still able to read CDRW.
Post by: qx2pow on January 10, 2003, 05:22:00 AM
Post by: RenegadeUK on January 10, 2003, 07:36:00 PM
Intenso White Top
Intenso Silver Top
Traxdata Black Top
Data safe media (Absoultely love these)
Post by: zIOn.ita on January 11, 2003, 04:55:00 PM
Post by: MOE on January 11, 2003, 07:03:00 PM
Post by: BenJeremy on January 11, 2003, 07:24:00 PM
Post by: BenJeremy on January 12, 2003, 09:43:00 AM
| QUOTE (zIOn.ita @ Jan 12 2003, 12:22 PM) |
| Moe you're great mut sorry I canàt measure the ohmage between 1a and 3a (too little spots) so please as my last request can you post the ohmage between the centers of the two spots? it's easier to measure for me and is a reliable source of information. I know how annoying to open your xbox again just to satisfy a lamer like me..but If I canàt get out of this I need to buy a replacement dvd thanks a lot man |
Erm, you HAVE to measure the ohmage between the points he diagrammed. Any other measure would be invalid.
Post by: zIOn.ita on January 12, 2003, 10:58:00 AM
Thanks
Post by: BenJeremy on January 12, 2003, 11:11:00 AM
| QUOTE (zIOn.ita @ Jan 12 2003, 01:58 PM) |
| I'll try with the needles, but I yhink that ohmage between pot is still a valid measurement. Thanks |
No it is NOT a valid measurement.
One pot adjusts the strength of the CD laser pickup, the other handles the DVD pickup. Measuring between the two pots is not a valid measurement at all. Measuring from the TOP of the pot (the screw) to another point is not a valid measurement.
Post by: psazerodivide on January 12, 2003, 09:59:00 PM
Post by: MOE on January 13, 2003, 10:32:00 AM
| QUOTE |
MOE's tutorial mentioned 'almost doing a quarter turn' which is the bad thing |
Look,
If you read carefully my tutorial, you'll notice that I say turn the pot little by little and test each time, then I said "in my case I almost did a quarter turn"
I did not said that you have to do a quarter turn, the pot are not all adjust at the same position on each Xbox, if they were, they would have put fixed resistor instead of a pot.
Now I gave the right ohmage for my laser adjustment, but it could happen that your Xbox have more success with, let say 325 ohm, it depend on many factor: Laser specification, media used, etc...
I'm not sure that someone who can't use a multimeter, or who think that he can have a valid measure between the two pot should attempt on doing this tweak.
Anyway, I hope that most of the user have succeed, and to those who critics, well, what have you done for the scene lately.
Post by: jsm on January 13, 2003, 10:44:00 AM
Post by: methadone_pretty on January 13, 2003, 12:33:00 PM
Post by: psazerodivide on January 13, 2003, 05:43:00 PM
| QUOTE (MOE @ Jan 13 2003, 06:32 PM) |
| If you read carefully my tutorial, you'll notice that I say turn the pot little by little and test each time, then I said "in my case I almost did a quarter turn" |
Okay, I misinterpreted that as a limit. That's good information. I'll keep trying. Thanks!
Post by: BenJeremy on January 13, 2003, 06:55:00 PM
| QUOTE (MindgamE @ Jan 13 2003, 04:05 PM) |
| I tried tweaking my tompson drive and now the drive just ejects and doesnt even try to read the disc, any information on what could be wrong? thx |
I could be mistaken, but perhaps you didn't hook back all the cables correctly?
Post by: BenJeremy on January 14, 2003, 07:58:00 PM
| QUOTE (MindgamE @ Jan 14 2003, 10:55 PM) |
| Im pretty sure i did, i triple checked everything.... i guess it is unfixable |
PRobably not unfixable.
Double check the ohmages and try and set them back to the "original" specs described here.
I think my Thomson did something similar when I adjusted the pot too far.
Post by: DarkLegion on January 15, 2003, 10:58:00 PM
And anyone who gets problems don't give up on it,its more than likely not stuffed as i got most of the problems here...sometimes its better to turn it a bit further than back as i found a lot of spots b/n the original alignment and the spot i found(a bit less than 1/8 of a turn) fucked up badly or the laser had a lot of trouble reading.
Post by: ioiotutu on January 16, 2003, 02:28:00 AM
The adjustment seems to be similar to philips. I tried all position of pot (from 1600ohm to 800 ohm), the best position is about 920ohm.
The situation is a little bit better but the drive doesn't read cdrw. My impression is thet the problem it isn't the gain, this is confirmed also by the pot that is very sensible to turning (moving a little the pot change the resistence a lot!!). For me the problem is in other place (optical, laser or firmware).
What do you think?
Post by: psazerodivide on January 19, 2003, 05:48:00 PM
Post by: rotomax on January 20, 2003, 04:12:00 AM
Why don't try to adjust both?
Post by: naymenos on January 22, 2003, 08:50:00 AM
At the intend calibrate my philps in order to read cdr's , not me it was possible obtain and at the go back to her posicion opening no more we manage which me they caught the DVD quaint nor imitations. She thinks which it used to be sake of the pot and puse 660 Ohmio , him gauged to Ohmios and I have achieved but of 100 tests , but me is impossible which me lea quaint and imitations at DVD only , order read cdrw.
I have one foto of as itself she has stayed hereinafter of weld one pot of 1K. Around whether the formal accusation view. But now that he know-how awfully hours rather than by funciona which me she touches do?, can I buy a one DVD Xbox?.
I don't talk well but I'm Spanish At once itself which esta her possibility of put one DVD Outward and interior but not we'll read the quaint.
Post by: Papa on January 22, 2003, 08:27:00 PM
Is there a chance I have ruined my drive?
Should I play with the Other POT screw? Can someone confirm this is for DVD pickup?
I have tried changing it back to the original position where I have marked it but still no go.
Anyone?
Thanks
Papa
Post by: xzonex on January 23, 2003, 03:36:00 AM
Post by: Meisi on January 27, 2003, 12:54:00 AM
Noone nows if anything else coulde be damaged?
Thx for any answer!
Meisi
Post by: BenJeremy on January 28, 2003, 10:10:00 AM
As stated, doing a tweak is "at your own risk" - but it really shouldn't be that bad for a patient person willing to use the correct tools and put up with the repetitive process of disassemble-tweak-assemble-try until getting the thing correct.
Another cliche in play here is "Your Mileage May Vary" - meaning one person's settings may not work for another.
Tweaking those pots essentially changes the power to the laser diode (lower ohms means more power). Adjusting the ohms too low will most likely result in a shorter lifespan for your drive's laser (and thus, the drive itself).
If your system reads the media it's expected to read, LEAVE IT ALONE. Compatibility generally follows the following:
Philips-
- DVD-R
- DVD-RW
- DVD+R
- DVD+RW
- CD-RW
- (some?) CD-R
Samsung-
- DVD-R
- DVD-RW
- (Some) DVD+R
- (Some) DVD+RW
- CD-RW
- CD-R
Thomson-
- DVD-R
- DVD-RW
- DVD+R
- DVD+RW
- CD-RW
If it's marked "(some)" then it might work, but don't expect it to. Only try tweaking it if it doesn't work with a media it should work with.
As for CD-RW compatibility, try a lot of brands first... some brands NEVER work for CD-RW on the Xbox. Also, test it against a friend's Xbox, if possible.
In short, don't tweak if you don't have to. If you are desperate to get CD-R/RW working, think about getting a DVD-R burner, instead.
Post by: Papa on January 31, 2003, 07:05:00 PM
And I am sure these questions sound silly. But I would rather play it safe now (bit late, i know) and get everyones advise, esspeccially when we have experienced electronic technician's on the forums.Thanks for any help, I will be forever greatfull.
Papa
Post by: BenJeremy on January 31, 2003, 07:11:00 PM
| QUOTE (Papa @ Jan 31 2003, 11:05 PM) |
| If I can still read CD-RW disks would you guys think there is a good chance of fixing this? I have gone and bought myself a multimeter and have been reading all i can find about using etc. But I would really be very greatfull for a bit more detail on how to test the ohm's of the POT. Is it resistance i am testing? I am assuming I set this multimeter to 20k or 200k (in Ohms). I measure between 1a and 3a then turn and test again till i have correct approx 300ohms ? Does power need to be plugged in? I know I shouldn't have played with this at all if i wasn't sure what i was doing. And I am sure these questions sound silly. But I would rather play it safe now (bit late, i know) and get everyones advise, esspeccially when we have experienced electronic technician's on the forums.Thanks for any help, I will be forever greatfull. Papa |
It is resistance, and you don't need the power on (quite the contrary, actually).
The ohms were reported earlier in this thread.
Better to be high, then low, as far as safety goes, since lower values means more power to the diodes, which means faster burnout.
Post by: Papa on January 31, 2003, 08:47:00 PM
| QUOTE (MOE @ Jan 12 2003, 04:03 AM) |
| Between 1a and 3a you should have near 660 ohms Between 1b and 3b you should have near 1032 ohms (1.032 Kohms) Remember you should not change the setting of the right pot ( the "b" one), I've only include the ohmage for those of you who change it by mistake. For your information, the left pot on my Xbox is now set to 300 ohms and it read all my DVD+R +RW and some CD-R Wish you the best and remember to be very carefull when changing those setting ! HINT: I use two needles wired to my prope to get access to the pot pins |
I am certain I havn't touched the second POT screw but tested the reading to see what I got and its 570omhs ?? nothing like the 1032 suggested. Maybe I changed it in my sleep (sleep tweaking).
Now I am really confused. Should I play with this one?
Is this 4 DVD pickup because this is my problem (DVD reading).I can still only read CD media and have tested changing the first POT so much I think I have threaded the screw
I suppose I can't do much more damage...
Papa
I might just go buy another Xbox.
Post by: garry on February 06, 2003, 10:52:00 AM
Post by: FABZ on February 08, 2003, 06:55:00 AM
Post by: FaMiNe on March 19, 2003, 04:23:00 PM
from the pic that MOE posted it looks like we have to put each probe on a different side of the POT (looks like a screw to me)... that seems pretty damn precise, and odd to me.. but then, i dont know how POTs work.
if someone could explain in more detail how to achieve these measurements, i'd greatly appreciate it =)
I got some of my old man's tools, and a fluke true rms multimeter among them, but not knowing how to use it makes it pretty useless.
Post by: j0nes on March 19, 2003, 11:40:00 PM
Post by: j0nes on March 21, 2003, 12:19:00 AM
Post by: Ev01vEd on April 13, 2003, 10:44:00 PM
Thanks.