Scenyx Entertainment Community > Xbox 360 Dvd Pot Calibration Tut V1.0 By Moda

Full Version: Xbox 360 Dvd Pot Calibration Tut V1.0 By Moda

Scenyx Entertainment Community > Xbox360 Forums > Xbox 360 Hacking Forums > Technical DVD-ROM and Modified DVD Firmware Forum

Pages: 1, 2, 3, 4, 5, 6

moneydog96

Oct 19 2007, 08:51 PM

Games weren't playing so I followed the guide.
Samsung MS25
Original - 3.38
New - 3.19
A few games still aren't playing so I might have to got and adjust it more later.

A1patriot

Oct 21 2007, 09:42 AM

Thanks, I almost sold my xbox on ebay as faulty.

orig:4.4
tweak:3.4

Bahnzo

Oct 26 2007, 01:29 AM

Thanks for the tut! I had some problems with my ms25 reading backups, they were very intermittent. The laser measured 3.18, and I adjusted it to 3.02, now it plays everything I feed it (verbs only).

adriana

Nov 7 2007, 03:09 AM

Be very careful when removing that DVD ribbon that connects the lens to the logic board.
The ribbon connector has gold plated type lines that can scratch off.

I scratched off some of the gold plating. Now I'm just going to replace the entire drive. I know I could just buy a DVD lens replacement instead but it's too much time for me. I have already wasted 4 hours and purchased a $20 multimeter that I will never use again.

If your time is worth more than $40 on a new drive. I suggest you purchase a replacement drive instead.

ThUgLoVe

Nov 20 2007, 09:26 PM

I Didnt read thur the whole thread so if this has been said then plz just over look this.but b4 you even think of touching the pots try cleaning the lens 1st..

i haven't really had any problems reading disks for the life of the drive even going 5 months to a year or more with out cleaning the lens..then around the time ncaa 08 came out some retail disks wouldn't load but maybe 1 out of 5-30 trys and would just show up as a dvd .i thought it was just the disks as cleaning the lens didn't really help.then over the past few days it had got so bad that i sit for over a hr trying to get ace combat 6 to load again thinking it was just the disk.

then it got even worse with cod4 to the point that it wouldn't even see a disk in the tray.i thought it must be going bad as i just cleaned the lens last month but i cleaned it again and now cod4 loads within 5 secs of hitting the tray..

if its as bad as mine and your going to try the pot tweak,try cleaning the lens with a q-tip and some rubbing alcohol 1st..

Kinitex

Dec 18 2007, 08:19 AM

Well I had nothing to measure the power of mine, so I figured I would adjust it a bit and test, adjust, test and so on. I turned mine about 25 degrees clockwise, and it was an improvement. Instead of just trying to read and read, this time it would give me an error much quicker. So I raised it another 10-15 degrees, and now everything I throw at it boots right up quick as hell. I am not sure if I am giving it too much power or not but its workin and thats all that matters lol.

Abonidal

Dec 19 2007, 11:18 AM

I have a Hitachi 47dj drive, and none of my backups worked. Even tried almost all hacked FW's. Bought a pioneer 112d burner (i had a NEC 3500a, with Lizzy FW) and used Verbatims disc's, but to no avail!

They all do work on TS en BenQ drives, so the backup's themselfs are fine!

I used MODA calibration tutorial and it did not work also. Then i was so fed up with it that i ordered a new drive. Waiting for it (and thinking what the heck), i tried to tweak de laser a bit more dan everybody here advises to do. I turned it 1,93 Ohm, and now it plays my backups! Even Arita's burned on a NEC!!!

Verbatims do play better.. Altough i tested it a bit, i was afraid to burnout my laser. My question also is, does this happen immediately, or over a while using the drive. I also read somewhere (do not remember where

) that the 47DJ drive is capable of tweaking the laser a bit more than other models..

Greets!

Kinitex

Dec 20 2007, 01:30 AM

QUOTE(Abonidal @ Dec 19 2007, 11:54 AM)

They all do work on TS en BenQ drives, so the backup's themselfs are fine!

) that the 47DJ drive is capable of tweaking the laser a bit more than other models..

Greets!

I too have a 47DJ. I bought it off ebay cheap cause the seller didnt know what was wrong. I opened it up and pot tweaked it without a multimeter. Bad idea i know. But where I set it, everything worked absolutely perfectly. I loaded a few games and all was good. I did some more research and saw just how dangerous a low resistance can be and I really had no idea how much I changed it. So I went and bought a real nice $40 multimeter(will come in future use) and check it. It was at 0.99 LOL. I set it back to 2.91 and everything still worked. Tried 3.6 and everything worked but it seemed to struggle just a bit. So I set it to 3.43 and everything is just perfect.

I hope I didnt kill the life of the laser too much. What do you guys think?

Abonidal

Dec 20 2007, 10:01 AM

QUOTE(Kinitex @ Dec 20 2007, 02:06 AM)

Did'nt it turn your drive into a laser cutter?!

3.43 is almost factorysetting. Strange that it did'nt worked at the former owner..Maybe he tweaked it much to high. Above 2.00 none off my backups worked. Actually now i've turned it to 1.95. Now the Arita's work perfectly! I've played all night, without any problems! If my laser burns out, i have a spare drive, so it's no problem. Otherwise it's worthless for me!!

Kinitex

Dec 24 2007, 07:27 AM

The original owner didnt know a thing about pot tweaking. But yes I am shocked that it lived a few hours of gameplay on 0.9 resistance, and now works at 3.6. It must have been set at 4+ factory. Amazing.

krazyman

Dec 28 2007, 02:31 AM

I originally had a problem with my refurb 360, so I bought a new laser, now that I having problems. So I opened my 360 and check the reading on the pot. It was around .9

Now I have increased it to around 3.6 and it still isn't working. Do you guys think the laser has burned out? (it has been running at .9 for a few months) The weird thing is that some games work fine, while others don't.

masterkm

Jan 2 2008, 11:04 PM

I tweaked my Hitachi 47D today and it now reads evrything i threw at it. No problems have come up since.

I tweaked it from 3.97 to 3.51, and it worked.

If i experience any problems i will just tweak it again to around 3.10 because that is what i have heard to be the best resistance.

masterkm

Jan 3 2008, 06:27 PM

Was playing on PGR4 and the console came up with Unreadable Disc Error after playing for about 3 hours. Then it would not read verbatims untill put in twice.

I am going to tweak it again to see what happens.

Has anyone got any other suggestions?

alien2108

Jan 4 2008, 01:08 PM

Hey all!

I have Hitachi 59 drive flashed with Maximus/GaryOpa 2.3.

I had a problem where the drive magnet did broke away, so I glued it back in place, but now I have problems with reading backups. Some do work, some don't work anymore.

I checked my pot and it was 4.4KOhm. So I tried to tweak it, but nothing helped (4,3.8,3.6,3.2...). I ordered replacement lens and when that arrived yesterday I removed the solder point, installed it and guess what. NO DVD worked anymore. Even DVD movies or original games didn't work. Pot was 3.2Kohm. Tried to tweak it down to 2.8KOhm, but no luck. Nothing worked. CD's did play though.

Putting back old lens returned the drive to previous state. DVD movies work, originals work and some backups.

My guess is that new lens is defect...Anyone had same problem with replacement lenses?

fitsman

Jan 11 2008, 02:33 PM

Is there any newest pot calibration that supports benq & hitachi drives?

Bossbollin

Feb 3 2008, 02:16 AM

Toshiba Samsung Storage Technology

iXtreme 1.4

Part No: X800473-019
TS-H943A/MCAH 6RQL764641 F/W=ms28
H/W:007 Ver.A JULY 2006

Default Pot Resistance 4.42 ohms = Some Backups not working.
1st Attempt Pot Resistance 3.06 ohms = Problem still exist.
2nd Attempt Resistance 3.54 ohms = Partial Read, then disc error.
Current Pot Resistance 3.88 ohms = All Backups are working.

Thanks MODA!!

dx11xd

Feb 15 2008, 03:42 AM

If you don't feel like buying a multi meter about how much % would you normally turn from default?

Toddler

Feb 15 2008, 05:25 AM

No way to answer that accurately because "default" is different from drive to drive.

Ring of Death

Feb 22 2008, 09:56 PM

Hey Moda, very very very cool tutorial!!!!!

My Hitachi drive didn't play some games so I reduced the k Ohms from 3.67 to 3.13 and everything works!!!
Great!!!

But one question(as I've written in the PM, but maybe some other people want to see the question, too.):

Will it be a problem for you if I translate this tut into German for the "gulli:board"-users(http://board.gulli.com)??

Greetings,
Ring of Death.

johnnyo

Feb 28 2008, 04:55 PM

Do i have to put the drive back on power? becuase the multimeter doesn't show me anything, or is the screwdriver gave the pot el. power? Anyway my multimeter isn't showing me any number.

johnnyo

Feb 29 2008, 11:33 AM

OK my multimeter was on HOLD. Heh, it was a long time since i was last using it.

Thanks for this tutorial, everything seems to be working now.

akaneo

Apr 8 2008, 05:11 AM

Just did this on a drive that wouldn't read backups. Extremely useful for the "Worked great, but I don't know what happened" scenario.

DVD-ROM DRIVE MODEL TS-H943 (Toshiba Samsung)
H/W: 007 Ver.A September 2006
MS28

Original Reading: 3.66 (Originals OK Dvd's OK Backups NO)
New Setting: 3.44 (Everything is working GREAT!)

The lens seems to be making slightly more noise...is this normal?

THANKS for a great tut!

curiouscreature

Apr 15 2008, 09:39 PM

QUOTE(Moda @ Jun 4 2006, 02:52 PM)

Ive made a tutorial for all those people having problems with their discs

Dirty Disc Errors
Games crashing half way through , due to reading problems
Discs sometimes loading, and sometimes not being recognised
the classic "OPEN TRAY" problem
and also glitching FMV or slow loading games (some games are just slow, its normal so be patient)

Please remember to test the disc on another console to ensure you have burnt it correctly. This is so you dont go and adjust the pot when its actually ok.

Download from the link below..

http://rapidshare.de/files/22184766/XBOX_3...y_Moda.pdf.html
X-Scene mirror: http://dwl.xbox-scene.com/tutorial/XBOX_36...1.0_by_Moda.pdf

I will release a much better looking tutorial with a guide on what media is good/bad , which brand dye to go for etc , this should be complete in the next few days. in the meantime if this tutorial is any benefit to you please post here.

also.. please let me know if there are mistakes in this tut so i can correct them ASAP
Thanks
Moda

go with this guy's advise... i had the same problem on my samsung drive and after trimming the pots my 360 has worked fine ever sincde... turning the pots can be a little difficult, i used a small pair of sissors to turn them u can use whatever works...

tyler5

Apr 24 2008, 10:33 PM

my samsung drive's default pot was 5.4.. i calibrated it to 3.8 but nothing changed?

fitsman

Apr 26 2008, 12:55 PM

Has anyone a guide with pictures for how to calibrating the pot of lazer at the benq drives.
A lot of thanks.

Hakmed

Jun 4 2008, 07:16 AM

Tested and work like a charm!!!!!

Be careful some drives seem to love borderlines!!!!!

2.95 work with best results for 6 drive I have done so far!!!

Before this tweak,80% of my backup had disc read error or no disk

After 90% of those same backup work without any problems (the last 10% are old backup so...... not stealth that why they are not working!!!)

Nice job with that tuto!!!!!

oh and by the way 2.95 is the best value for hitachi!!!! I will not take any responsability if your drive died after seting your drive to 2.95!!!!!

Thanks!!!

ahmedss79

Jun 7 2008, 12:14 PM

QUOTE(Moda @ Jun 10 2006, 03:42 AM)

Ive been doing some more research into drives and getting all brands of dvd+r DL to boot.

ive come to the conclusion that if your dvd drive is set to 4.00k ohms or more from the factory you will have a far better chance of booting most brands of media without errors. (or maybe it is that HLG laser units are better made?)

i came to this conclusion after i had a TS drive which wouldnt play ritek dye or MCC dye regardless of how much i tweaked the pot. so i took a HLG drive and swapped the laser unit from within the drive (these can be swapped with any brand of drive)

original TS laser unit was set to 3.59k ohms (regardless of how much i tweak the pot it doesnt read ritek or MCC brand dye - pot tweak doesnt work)

swapped in HLG laser unit reads 4.15kohms (reads all brands of media i have thrown at it so far)

you can try this yourself, you just lift the screw from one of the guide rails of the laser unit and slide the unit out. swapp the guide arm around so it fits your drive (peice of plastic with a spring on it.)

I hope someone finds this information useful, please try it and let us all know if it works for you.
oh and one more thing, you can buy spare laser units for very cheap so if your having problems reading your media just buy a new unit from someone, they sell them on a popular modchip site in uk for 15 pounds. im not sure how much in $tate$

i just wan to know if can replace the xbox 360 laser unit with the one found on DVD DL drives like LG and samsung and sohld it be of a reader or writer

what's the cd and dvd original calibration ?

C ya

chesspoker

Jun 8 2008, 10:19 PM

QUOTE(panosvo @ Jun 5 2006, 10:24 AM)

DId anyone done it? Then post results!!!!!

I did it and it worked for me.

I was getting frequent disc unreadable errors. About once per half hour on average, but I later managed to make it crash on demand by playing certain scenes.

Before I adjusted it for the first time, the pot measured 4.06k ohms. I brought that down to 3.22k ohms in one shot. I got far fewer disc read errors, but I noticed that the drive had trouble finding locations on the disk. So I adjusted the pot to 3.85 ohms.

Now it works just fine. No errors, no trouble finding locations on the disc. Thanks!

Syndori

Jun 12 2008, 09:01 AM

posting to thank moda for the tutorial. saved my benq drive

. went from getting frequent disk read errors on backups and choppy fmv on retail disks, to working nearly perfect.

QUOTE(fitsman @ Apr 26 2008, 01:31 PM)

Has anyone a guide with pictures for how to calibrating the pot of lazer at the benq drives.
A lot of thanks.

sorry i didnt take any pictures, but here are the differences i ran into from the tutorial. i hope this helps a little:

1. after taking the metal casing off the drive, i didn't need to bother taking it apart any further. was able to adjust the pot fine from this point.

2. the benq's pot looks different than what is pictured in the tutorial. i was only able to get a steady reading by connecting the multimeter to the solder blob behind the pot, and one side of the center of the pot.

3. rotating counterclockwise reduced the resistance, whereas rotating clockwise increased it.

everything else is the same. mine is working great at ~3k ohms.

sabbath_dude

Jun 28 2008, 04:53 PM

Very useful tut, thanks to the OP. I'd never done any pot tweaking before today but the tut was very easy to follow and I had it done in under 10min.

My Samsung had been very temperamental playing both original and Verbatim backups over the last few months. Games would almost always boot with no problem but then usually freeze and give dirty disc errors at the least convenient time (normally when hosting a game or having just completed a level). Today I decided I'd had enough and was either going to buy a new laser or give this a try.

Anyway, the pot was originally set to 3.71k ohms and I set it to 2.91k ohms. Works perfect now!. No random freezing or dirty disc errors and load times actually seem to have increased. If it burns out the laser I'm not too bothered since I planned to buy a new one anyway. This had just saved me £15 for now at least

Shonk

Jul 2 2008, 12:58 AM

My mates samsung has been dicky with discs for a while
but almost totally stoped reading disks the last few days

i poped it open just now

3.74 from factory not reading disks anymore

set to 3.36

cleaned laser with watered down propanol mix 50/50
while it was apart

put back together its playing fine

mogman

Jul 6 2008, 02:08 PM

QUOTE(Shonk @ Jul 2 2008, 12:34 AM)

My sons 360 would play dvd`s.but would freeze or not read backup game at all

tested the dvd pot 3.42

adjusted it to down to 3.02

nice easy repair to do

works great now.

thanks

viper1024768

Jul 11 2008, 04:10 AM

Hi

Just finished going thru 13 pages! and trying the mod out. Some background, I can read the backups fine HOWEVER, original DVDs music videos/movies seem to hang at the main menu page. They will play for about 10-20secs and just hang at the menu screen. So I thought I would give this mod a try.

TS-H943A June 2006
orig : 4.015K
tried: 3.5K, 3.3K, 2.9K all didn't slove the hang issue
currently set to 3K

Any ideas anyone. TIA.

wade12

Jul 11 2008, 08:53 PM

well the tut is great, my orig. setting was 3.08 ohms and i tried 2.95 and still no response, so i figured lets go bottom line all the way to 2.81 ohms and its now playing my backups again. im worried though however......when the 360 starts to read man it makes the scratchiest sound......should i be worried? or is this pretty common? also.....do you think i should try going higher in the ohms like for say 3.3 or so?. i would try it playing with it more but it took me an hour to get the drive reading again so i figured you may be able to help (its a lil less stressful that way lol

) please respond to this as im afraid to play discs due to my laser being fried thatnx in advance!!!

and id also like to say to all who must do this and are nervous....its not that bad just be carefull with the ribbons and take your time and itll be fine

traitor2

Aug 12 2008, 04:05 PM

hey everyone.
first off, props to all of you for bein ballzy enough to open your 360. was a daunting task for me at first, but now im gettin' pretty familiar with the guts of this thing.

so last night, calibrated the pot.

default: 3.48

then, dropped it down to 3.15, then down to 3.05, then to 2.95, then to 2.85. Now back to 3.15. None of these provided any consistency. tried the rubberband mod, and that doesn't seem to help much either. though, i don't know if i need to increase the bumper size there; maybe i didn't make it big enough to where its actually reading data on the disc.

so here's what i notice.

the dvd drive, upon inserting a disc, will spin up and down a couple times, fades to black as if its going to load the game, then it spins up and spins down some more for about 5-10 seconds, then eventually stops spinning and comes back with the unreadable disc message.

also, with my backup of halo which works about 50% of the time, I can play online, but whenever i try to load a campaign mission, it gives me "players failed to load content."

help! =] thanks in advance peoples

p.s., moda is the man.

traitor2

Aug 20 2008, 05:24 PM

halp

Bazdoctor

Aug 21 2008, 05:00 AM

Just read the tute, looks really good. Will have to give it a try on my old samsung. Thanks Moda.

gianniz

Aug 26 2008, 06:55 AM

i tried this pot trick on hitachi 47dj which came with the xbox i bought in australia when it was launched.
It was having trouble reading some disc sometimes and it was getting noticeably worse over the last 6months or so.

I tried this pot trick without any tools but my eyes and as adviced I only slightly rotated dvd pot clockwise a millimetre or so.

put in some games that didn't boot or was having trouble and my drive works better than when it was new!

woohooo. this made my day

fokia

Sep 4 2008, 03:47 PM

I tried MODA's pot cal. and rubberband mod (a year - or so - ago) and nothing seemed to help me read my only backup at the time.

Then, sticked to the original pot value (3.6ohm if I recall it right), cleaned the LASER (96%vol alcohol, q-tip) and made a bumper to the LASER positioning switch - everything was working fine.

Now the problems are back: some of my older backups (that used to read fine) start only to give dirty disc error after a little while. Latter today I hope to readjust the LASER POT again to see how it goes.

I'll post the results.

Also, a friend has an un-modded 360 (he hope so - bought it used; opened before) his console just stopped reading any disc. I opened it, cleaned it (lots and lots of dust...) but still it didn't read the DVD's. Then I tried to spin the motor and it was very hard to spin... I putted a disc in with no cover and it didn't spin at all!!! after some maintenance (clean/lube) to the motor it's spinning normally and the DVD's read fine again.

So: also check your driver motor!

fokia

Sep 8 2008, 12:22 AM

finally got the time to it. Adjusted de LASER pot as low as 2.8 but no avail...

I'm guessing poor media (intenso - someone else dye). But that bk had played well in the begining (even better acceptance than verbs before the bumper and LASER cleaning...) maybe the dye degradates over time or so.

I have to make a new bk this time with better media (verbs) and see hoe it goes.
But, i'm buying a new LASER, though.

krizalid

Sep 25 2008, 03:19 AM

Help, I got my hands on a borrowed Fluke 87V Multimeter.

I do not find a way to set it to 20K Ohms, and I'sure of using it, I don't want to fry the resistor.

It seems to go by Sixes and 10,100,1000

Has anyone used this one and read the values properly, how do you configure it, or don't use it?

Thanks in advance.

fitsman

Sep 26 2008, 01:31 PM

Is there any pot calibration guide for hitachi and benq drives...

emm1t

Oct 2 2008, 03:39 PM

thanks moda ,
pot was at 3.7 tried it at 3.4 no good
so reduced to 3.08 works great now
nice and easy fix

sas_ice

Oct 20 2008, 07:51 PM

Moda thankyou soooooo much. my sammy wouldn't read any original discs, followed your tutorial and so far have found calibrating the pot from 4.29 to 3.84 appears to have done the trick. No expense, just a few minutes of time and the 360 is up an running again. the tutorial was a piece of cake to follow, just what the doctor ordered. Well done

what more can I say, except I'm so impressed I've joined the forums...

edcheese

Oct 22 2008, 06:27 AM

I got it to work at first, but fallout was freezing on certain loading screens. Tweaked it to 2.8, now it wont read any of my recently burned backups again. It reads originals and old backups, like before i tweaked it, but not new ones. Verbatim 2.4x xmulleter checked. unplayable disc on startup. Tweaked from 4.1 to 2.8

TJD60449

Nov 21 2008, 09:42 AM

Moda you are semi godly. i have had my xbox apart a thousand times because of this reoccuring problem. granted i didnt have a multimeter but i slighty turn the pot clockewise and wa lah! thanks a bunch, if this hadnt worked i was gonna trash it for sure.

skywurz

Dec 5 2008, 08:57 AM

Thanks Moda!!! my 360 was bone stock and stopped reading all games and movies.(factory disks) It was out of warranty and I did not want to get R@ped by ms, so I broke the seal and found that my factory pot was set at 5.35k adjusted it to 4.13k needless to say it reads again and runs awesome!!!!! Saved me lots of $$$$ now since the seals broke maybe i will do some case mods

Thanks Again!!!!

calloused labia

Dec 5 2008, 09:02 AM

QUOTE(fitsman @ Sep 26 2008, 08:07 AM)

Is there any pot calibration guide for hitachi and benq drives...

I just did a Hitachi59 tonight the Hitachi had the same laser that the last 3 Samsungs I tweaked had. So for Hitachi the pot calibration guide is the same as this one.

skywurz

Dec 5 2008, 09:24 AM

QUOTE(calloused labia @ Dec 5 2008, 12:38 AM)

I just did a Hitachi59 tonight the Hitachi had the same laser that the last 3 Samsungs I tweaked had. So for Hitachi the pot calibration guide is the same as this one.

Mine was a Hitachi. This should work with most any drive. All I really needed was the value not to set the pot under.

@fitsman & other people who paid some one to mod there box, If you aren’t skilled enough to pull a disk drive apart and put it back together without a tutorial telling you to be careful of the cables, you shouldn’t attempt to open your Xbox b/c you are not mechanically inclined enough.

r1cardo

Dec 5 2008, 10:24 AM

My friend bought a laser from divineo and i checked the pot and it was 1.68 stock !!!!

.... i can't do anything with such a low value right? Or can i achieve good result raising the values a little bit. The drive isnt reading well with 1.68 stock.

This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.