SubZero fix - the new v12 fix on PCB by summ0ne

[summ0ne]

So for the last day ive been killing my mind how to combine the comsoft pic fix and mine on pcb and still make it fast + cheap enough for people to buy...

Then when i saw that you can mute the RS2004FS driver without using a PIC!!!

At first i thought to just drive the MUTE directly with the INT line of the mechacon - a 1 wire fix! CDs worked fine, but DVD media for some reason has such long interrupts that it mutes the RS so much, when there is not a mecha crash, the laser head starts oscillating...

So i somehow had to introduce the 50ms delay that the comsoft pic has to make DVD media read well:D

I used:
-1nF cap
-33k resistor
-1n4148 diode...

how does that work:
The cap is between any DC signal or GND and the INT line over a 1N4148 diode that can raise the voltage on the junction by charging/discharging the cap when the /INT is HIGH.
The voltage on the cap drves the /MUTE pin thru the 33k resistor.
When the /INT has a low pulse, the cap is not charged anymore, but discharges slowly thru the 33k resistor still not muting the RS, because the pulse is too short to let the cap discharge. And all media have the RS working well.
When there is a MECHACON CRASH, the cap discharges and mutes the RS within 50ms and leaves it mute.

You can test the mute function by disconnecting the /INT line from the circuit!

I WILL MAKE A QUICKSOLDER PCB soon and sell it on http://subzero-chip.com at a low price. It will have 4 solder points + 1 wire and require cutting 1 track. It will feature the fix just described + a +/-0.6V tracking limiter that will be auto-compatible with both the v12.1 and v12.2. It will NOT have a FOCUS limiter as the 4.7k resistor in my fix causes too many read problems + as the focus coil dies only in mecha crashes, the mute circuit will save it :-)

what do you guys think?

tests and comments are welcome within the next week, then i start PCB production:D

[iWeasel410]

What are the advantages of doing this over your easier two resistor fix? I've been playing GT4 for hours on end over the last week and have no problems with the resistor fix.

[summ0ne]

no advantages at all.

but might help those rare people that have trouble with the focus resistor, and it mutes the RS2004FS for those that like that option in the comsoft fix.

Basically it increases media compatibility and you dont have to make a jumper for v12.1/v12.2

The tracking limiting is to the exact same extent as in summ0ne fix, but autodetects v12.1/v12.2. The focus is saved by the mute function as opposed by direct limiting, making it able to read more dynamically and read more media brands.

[cakcetin]

good idea but need more test,for different resistors(303 and 683) do you use same pcb?

[cakcetin]

Waoow you are think and post quickly,thanks Summone.
Regards.

[comsoft]

So for the last day ive been killing my mind how to combine the comsoft pic fix and mine on pcb and still make it fast + cheap enough for people to buy...

Then when i saw that you can mute the RS2004FS driver without using a PIC!!!

At first i thought to just drive the MUTE directly with the INT line of the mechacon - a 1 wire fix! CDs worked fine, but DVD media for some reason has such long interrupts that it mutes the RS so much, when there is not a mecha crash, the laser head starts oscillating...

So i somehow had to introduce the 50ms delay that the comsoft pic has to make DVD media read well:D

I used:
-1nF cap
-33k resistor
-1n4148 diode...

how does that work:
The cap is between any DC signal or GND and the INT line over a 1N4148 diode that can raise the voltage on the junction by charging/discharging the cap when the /INT is HIGH.
The voltage on the cap drves the /MUTE pin thru the 33k resistor.
When the /INT has a low pulse, the cap is not charged anymore, but discharges slowly thru the 33k resistor still not muting the RS, because the pulse is too short to let the cap discharge. And all media have the RS working well.
When there is a MECHACON CRASH, the cap discharges and mutes the RS within 50ms and leaves it mute.

You can test the mute function by disconnecting the /INT line from the circuit!

I WILL MAKE A QUICKSOLDER PCB soon and sell it on http://subzero-chip.com at a low price. It will have 4 solder points + 1 wire and require cutting 1 track. It will feature the fix just described + a +/-0.6V tracking limiter that will be auto-compatible with both the v12.1 and v12.2. It will NOT have a FOCUS limiter as the 4.7k resistor in my fix causes too many read problems + as the focus coil dies only in mecha crashes, the mute circuit will save it :-)

what do you guys think?

tests and comments are welcome within the next week, then i start PCB production:D

nice one. ;)

but why not using the pic which can offer mucn more fanctionality.
anyway, when mechanics controll lock up will happen , the user will have to disconnect the pstwo from the power suplly bye hem self. so why not make it automaticly as my fix does?

u prooved u'r self as good electrition, but admit with the pic it's better :)

[summ0ne]

thank you very much:)

yes, it is better with the PIC - but without it costs below 1$

if you can get me programmed pics i can make another line ;)

p.s.
i just found out the diodes do not make it autodetect any more then a 2k resistor does. but with the mute function 2k is safe even on a v12.1 :D
so i will most likely add a 560 and a 1k5 resistor in series with a jumper that shorts the 1k5. So for those that do not notice the jumper it will be autodetect, and the extra cautious will be able to close that jumper making it bulletproof ;-)

[eagley]

Hi somm0ne, could you pm prices for the subzero chip and this fix if ordered at the same time. (or would you include it for free?). 10 chips or less

[comsoft]

thank you very much:)

yes, it is better with the PIC - but without it costs below 1$

if you can get me programmed pics i can make another line ;)

p.s.
i just found out the diodes do not make it autodetect any more then a 2k resistor does. but with the mute function 2k is safe even on a v12.1 :D
so i will most likely add a 560 and a 1k5 resistor in series with a jumper that shorts the 1k5. So for those that do not notice the jumper it will be autodetect, and the extra cautious will be able to close that jumper making it bulletproof ;-)

pm me and i'll link u to a factory in china that will give u each pic for 0.8$. and also thay can program it for u.

u can ask them for towsent preprogrammed pics.

[summ0ne]

subzero-fix pcbs in production, will be ready by the end of next week;)

http://subzero-chip.com/SubZero-fix-PCB.bmp


-total Component cost: 4 cents
-minimum hassle install
-always on top of your ps2 protection needs ;)

I will keep you posted

[SDU101]

I got a question. Why only use 5% tolerance resistors? Is 1% tolerance bad or something?

[summ0ne]

i meant use no more then 5%
1% is good, but unneccesarry


the final pcb design :D

http://subzero-chip.com/fix.bmp

[dungbeetle46]

I have been reading all the posts on the summone fix and I have a question for summone, so many people have said they have just applied the summone fix and now their machine is dead, cd wont spin etc. question: are all of these dead machines the result of a bad install or do some machines work with this fix and others dont. do you ever have one that dies straight after the install. I ask because I want to do mine, I am a tech and have confidence in my install ability but is that all that is needed or is it a 50/50 chance it will work

[summ0ne]

I have been reading all the posts on the summone fix and I have a question for summone, so many people have said they have just applied the summone fix and now their machine is dead, cd wont spin etc. question: are all of these dead machines the result of a bad install or do some machines work with this fix and others dont. do you ever have one that dies straight after the install. I ask because I want to do mine, I am a tech and have confidence in my install ability but is that all that is needed or is it a 50/50 chance it will work

A am very intrigued by it.

I have personally over 150 installs now with my fix and NONE dead. Not only that, but i am also fully confident that the theory behind it is right. That is also one of the reasons i am making this pcb fix. It will feature selected components and be made in controlled production, leaving very little to the user to do wrong/different. As long as it is a PCB, i have added the mechacon monitoring part and addressed all the problems in my thread.

We will see...

[william5k]

i meant use no more then 5%
1% is good, but unneccesarry


the final pcb design :D

http://subzero-chip.com/fix.bmp

How can I know where is polarity +/- for 1uf 10v capacitor ?
Because in the diagram it doesn't specify.

[summ0ne]

How can I know where is polarity +/- for 1uf 10v capacitor ?
Because in the diagram it doesn't specify.

If you connect the cap to the point on the (8.5V), then + is on that point.

You can also use GND instead, where (-) is on GND.

You can also use a ceramic cap - where polarity doesnt matter.


P.S.
First prototypes of the pcb are being manufactured as i write - the final PCBs will be ready really soon ;)

[brywalker]

Sounds hot. I just modded my v12 with a Matrix and don't want to use it yet. Can you please release this like tomorrow? ;)

[DIPLOMAT]

lol

[DIPLOMAT]

just use it yo, it wont hurt, just use high quality media when u burn your games

[Lord Van Nagash]

If you connect the cap to the point on the (8.5V), then + is on that point.

You can also use GND instead, where (-) is on GND.

You can also use a ceramic cap - where polarity doesnt matter.


P.S.
First prototypes of the pcb are being manufactured as i write - the final PCBs will be ready really soon ;)

I'm ready to buy 100 pcs as soon as the first batch finished :)

[brywalker]

just use it yo, it wont hurt, just use high quality media when u burn your games

I always use high quality media. But all I hear is people smoking the lens even with originals. There is no way the modchip does this because it shuts off after it boots. Just paranoia I guess.

[cakcetin]

I'm ready too buy 100 piece,only I wait release day...

[psxgameshop]

Me to SummOne, 100 pices or maybe more......

[summ0ne]

i am working on it :)

prototypes will come from china next week - and if all is good in the first week of april i will be shipping..

here are the approx prices:
(the pcbs will be packaged in antistatic baggies :-))

200pcs = 150-200EUR

1000pcs = 400-500EUR

[william5k]

If you connect the cap to the point on the (8.5V), then + is on that point.

You can also use GND instead, where (-) is on GND.

You can also use a ceramic cap - where polarity doesnt matter.


P.S.
First prototypes of the pcb are being manufactured as i write - the final PCBs will be ready really soon ;)


Thanks for the reply.

I want to know which capacitor are the best I can use : Capacitor Tantalum 1 uf 35 volt or Capacitor Electrolit 1 uf 10 volt.

Please give some suggestion, because I cannot find ceramic cap in my area.

[spedmetal]

This fix looks like a real hit. summOne I have sent you a PM please get back to me when you can thanks.

[cakcetin]

for 200 piece good price I wait for this.

[Bazeman]

A am very intrigued by it.

I have personally over 150 installs now with my fix and NONE dead. Not only that, but i am also fully confident that the theory behind it is right. That is also one of the reasons i am making this pcb fix. It will feature selected components and be made in controlled production, leaving very little to the user to do wrong/different. As long as it is a PCB, i have added the mechacon monitoring part and addressed all the problems in my thread.

We will see...


I know for sure that the dead consoles are install errors. The first one I did with someone's fix I blew up. It was because I broke of the SMD resistor from its via. I soldered the resistor directly to the SMD resistor. Then when I screwed the bottom back on the resistor broke of because of the pressure. :banghead: After that I always soldered a mod wire to the SMD resistors and the wire to the limiter resistor. From then on I never had a broken console anymore. I also stopped using the matrix PIC and I never had any console back. :dance:

[automan]

i found a bug in subzeros fix...some of the values are not correct...i use 1n4148, 33k and 1uF cap and use subzeros autoboot chip :-)...when i boot a ps1 backup it starts on autoboots 2nd reset then ps1 logo appear but after logo the laser makes noise...for me it feels like mute on mute off like a blinker...i'll try a higher cap or resistor to make reaction time longer...

[automan]

ok...it was a V12.1 with 303 resistors...i tested today a V12.2 with 683 resistor this one working perfect with the fix tested with all media...need to test now a second V12.1...

[automan]

tested 2nd V12.1 same blinker effect...tried high cap (2,2 uF) and higher res (43 K) but no go and no time for more testing...subzero can better fix it...

[summ0ne]

v12.1 on ps1 backups?

i will test and see how high i have to go with the RC.

thanx automan :-) just in time

never really tested ps1 backups - prolly just need a higher cap

[automan]

here comes something surprising...the same error appears with comsoft/albert35 fix !!!
i tested it with a backup from Tekken3 PAL...then i tested a V12.1 with a backup from Rayman 1 NTSC and with both fixes...no error appears...but my Tekken3 PAL does run perfectly without both fixes...maybe that 50ms is not enough for some PS1 games...still to test...

[comsoft]

I'm allways testing the console after midification with all kind of media including ps1 games and all works perfectly!!!

maby the tekken3 disk u have is abit faulty, tray a new backup and give the result!

[humanbean]

My original copy of tekken 3 skips on intro & always has.

[automan]

to comsoft: tested with new backup but same problem...you mean then that mute oscillating will appear on read errors ? mhhh...we then have to rise reaction time a bit...maybe 100ms...this wouldn't hurt the coils even...

BTW subzeros fix rescued me 2 lasers so far...both fixes...subzero's and comsoft's...are
the perfect fixes for the coils today...

but we need a second fix for the laser diode semi itself ! especially for the PVR type...
we all know that diode current (AutoGainControl) is rising on playing backups...it rises a bit more if you're using for example summ0ne's fix...the other side of the coin is if you decrease current on coils like summ0nes fix does, the ps2 max the current to the laser to balance too much read errors...the result is like many users report a dead dvd laser diode...

we need a fix what limits the AGC to a proper healthy current for the laser semi...maybe it's just a resistor added to the right place :-)

[comsoft]

to comsoft: tested with new backup but same problem...you mean then that mute oscillating will appear on read errors ? mhhh...we then have to rise reaction time a bit...maybe 100ms...this wouldn't hurt the coils even...

BTW subzeros fix rescued me 2 lasers so far...both fixes...subzero's and comsoft's...are
the perfect fixes for the coils today...

but we need a second fix for the laser diode semi itself ! especially for the PVR type...
we all know that diode current (AutoGainControl) is rising on playing backups...it rises a bit more if you're using for example summ0ne's fix...the other side of the coin is if you decrease current on coils like summ0nes fix does, the ps2 max the current to the laser to balance too much read errors...the result is like many users report a dead dvd laser diode...

we need a fix what limits the AGC to a proper healthy current for the laser semi...maybe it's just a resistor added to the right place :-)

My fix don't messaround with the coils currents so no problems if dead diods here.

since i don't wanna jump right to 100 ms delay before shutting down RS2400FS, i dicided to make a 75ms for u to test it, if it still will have the problem u taled about then i'll make it 100 ms as u asked!!!

I attached the modified v3.2 which i call it now v3.3

good day :D

[summ0ne]

just tested a v12.1 with Tekken3 PAL and it works like a charm with the original values.

But just in case i will up the RC by using a 2.2uf cap - tested, works perfectly!

on the manufactured pcbs :)

When they are fully in stock (5000pcs) i will inform you in this thread.


So with 2 jumpers you will be able to take both approaches.

-subzero fix + 2k summ0ne on the tracking (a must for 12.1 - if sony did it on 12.2, then its right)

-full summ0ne (both jumpers closed)

-all (subzero + full summ0ne).

It is all quicksolder, just 1 wire for the /INT signal.

compared to your fix, comsoft:
-no 5v wire
-no gnd wire
-no eject wire
-no off wire
-no 2nd /mute wire from mechacon
all unnecessary wires eliminated B)

update:
a snapshot of the pcb, still deciding between black/white color (attachment):D

[comsoft]

just tested a v12.1 with Tekken3 PAL and it works like a charm with the original values.

But just in case i will up the RC by using a 2.2uf cap - tested, works perfectly!

on the manufactured pcbs :)

When they are fully in stock (5000pcs) i will inform you in this thread.


So with 2 jumpers you will be able to take both approaches.

-subzero fix + 2k summ0ne on the tracking (a must for 12.1 - if sony did it on 12.2, then its right)

-full summ0ne (both jumpers closed)

-all (subzero + full summ0ne).

It is all quicksolder, just 1 wire for the /INT signal.

compared to your fix, comsoft:
-no 5v wire
-no gnd wire
-no eject wire
-no off wire
-no 2nd /mute wire from mechacon
all unnecessary wires eliminated B)

update:
a snapshot of the pcb, still deciding between black/white color (attachment):D

On V4 which is in prodcing right now the wires go down to 5.
but on u'r fix:
-no test mode
-no indicator led (on v4 and v4.1)
-no shutdown to console

:)

also today finsihed v4.1 which will have extra feture

[summ0ne]

On V4 which is in prodcing right now the wires go down to 5.
but on u'r fix:
-no test mode
-no indicator led (on v4 and v4.1)
-no shutdown to console

:)

also today finsihed v4.1 which will have extra feture

what if i say im gonna make another fix with CDDA firmware upgrades and in-game heads up display on a PIC12F629

just u watch :D , 1 month, comsoft, 1 month!

[comsoft]

Good luck :)
I will buy it for sure!!!

just a thought!!!
since u good with analog electonics, u can make another RC cirquit to shut down the ps2, with the same approch u did with shutting down the RS2400FS chip!!!

[automan]

haha you're funny...i tested both fixes with the crappy V12.1 working now perfect...

Yesterday i talked about a fix for the laser diode itself and today i've got a V12 back from a customer with a dead DVD diode within a PVR type Laser...the PS2 is 3 days old :-( ...fitted with Subzero's fix the coils are perfect :-) any proposals ?

[summ0ne]

Good luck :)
I will buy it for sure!!!

just a thought!!!
since u good with analog electonics, u can make another RC cirquit to shut down the ps2, with the same approch u did with shutting down the RS2400FS chip!!!

if you will buy it i will try it ;) - give me a month

i thought about making the RC circuit to shut down the ps2, but it is not the minimalistic approach i am aiming for with the subzero fix. The user will shut it down anyway, what matters is that it protects the ps2.

I never viewed the /INT with a scope, how does it behave on startup? because if it is low for 2sec, then a RC is impossible as far as shutting it down goes, because it will shut it down as soon as it boots.

[summ0ne]

haha you're funny...i tested both fixes with the crappy V12.1 working now perfect...

Yesterday i talked about a fix for the laser diode itself and today i've got a V12 back from a customer with a dead DVD diode within a PVR type Laser...the PS2 is 3 days old :-( ...fitted with Subzero's fix the coils are perfect :-) any proposals ?

arent the potentiometers on the lens for trimming the diode? try decreasing (counterclockwise) until it barely reads

[comsoft]

haha you're funny...i tested both fixes with the crappy V12.1 working now perfect...

Yesterday i talked about a fix for the laser diode itself and today i've got a V12 back from a customer with a dead DVD diode within a PVR type Laser...the PS2 is 3 days old :-( ...fitted with Subzero's fix the coils are perfect :-) any proposals ?


what do u mean work now perfect? with the Versin 3.2 (50ms dealy) or with the custom version i made for u (v3.3 75ms dealy).

i really don't think we sould go to 75ms since i've tested with alot of ps1 games and i don't see how come tekken 3 is defferent!!!

it semms like a media issue rather then a game issue!!!

about the diode, i had once DMS3 modified ps2 that killed a diode twice before installing a fix.

[automan]

i tested the 75ms one...maybe the problem depends on component tolerance in the ps2...the V12.1 i tested shows problems with 50ms others not you know ?...even 200ms would be a good protection for coils...i saw them burning after more than 1 second...

about your burned dms3 modified ps2...that's the proof that diode burn happen on playing backups caused by too much current...like summ0ne suggest it could be help to decrease laser diode current by adjusting the DVD potentiometer...

[comsoft]

so it's working fine with 50ms right, i didn't had any problems here with ps1 and tested on all the 100 pstwos i installed. if so then i will leave it on 50ms, since the best way to save the lens is to cut the current as fast as possible. even though if it takes more then that to kill the coils, i don't want the coils even be hurmed a bit :)

the dead diode i saw only once on DMS4. never had this problem before. i could be a board related problem, or chip issue!!!

[Lord Van Nagash]

about the diode, i had once DMS3 modified ps2 that killed a diode twice before installing a fix.

For sure a chip issue ... the DMS3 isn't designed for pstwo

[spedmetal]

For sure a chip issue ... the DMS3 isn't designed for pstwo


Wasnt there A dms3+ that was combatable with v12's there at the end right after the dms4 came out? Pretty sure I remember that.

[loy]

yeah the dms3+ does work on v12 ther diagrams are also up

[DanielT]

summ0ne:
I've made the most fatal misstake, I forgot to cut the line on the circuit board. My laser went to hell before I got the chance to even get the toxic OS into the DMS4 flash.

Can you confirm that the SubZero fix without the circuit board cut immidiately burns the laser? I do not have the strenght at the moment to debug what happens when the signals mix.
Do I have to look for other faults?

I want to be sure that the new laser I'll order tomorrow will be safe after I've cut the line.

I have the 2.0k resistor for the tracking and the 33k, diode, 1uF electrolyt cap for the mute function. (but as mentioned above forgot to cut the line.)

Edit:
Is it risky to borrow my friends laser to test with. eg. are there a laser driver chip that is destroyed to? Will it ruin my friends laser if that driver ic is faulty?

[summ0ne]

I dont think that forgetting to cut the track will burn your laser.

Unless your laser was burnt due to lack of protection...

Try to measure the coil resistances and report the values!

[DanielT]

I dont think that forgetting to cut the track will burn your laser.

Unless your laser was burnt due to lack of protection...

Try to measure the coil resistances and report the values!
My laser is defenitely burnt, grainy instead of clear and shining. It also smells like burnt electronics.

Where shall I measure? (or was that to check if laser is burnt? which it 100% sure is)

Edit: Brand new unit. Did the fix and chip install at the same time. And before that I only watched 10min of a DVDmovie (not dvd-r/+r).

Edit2: found a picture explaining where to measure.

[DanielT]

Edit2: found a picture explaining where to measure.
measured the coils according to this picture:
http://www.infinitymod.com/matrix/webgfx/V12Prob/big/Schematics.JPG

Tracking coil ok: (5ohm)
Focus coil NOT ok: (2 ohm)

I would guess that the 2kohm resistor saved the tracking coil. But the Subzero fix without cut line seems to have destroyed the focus coil and the laser.

[summ0ne]

yes, you must cut the line - because if you dont, the subzero fix cant mute the RS2004 during a mechacon crash :(

[DanielT]

yes, you must cut the line - because if you dont, the subzero fix cant mute the RS2004 during a mechacon crash :(
Ok, well the line is cut now.
After reading your 95% and 5% about the two resistors I wonder, was I among the 5% the second I started the chipped unit or did the uncut line cause the PStwo's own circuit to malfunction when opening/starting up? Since the line in an unmodified unit must be related to the focus and now I had a half fix that tampered with the PStwo's own mute.
Therefore no /mute at all, neither PStwo-mute or fix-mute !?

Now I'm just curious if I dare trying a new laser or if some component on the board (like the RS2004) has been damaged (and may damage my new laser!?)? Or if it most probably is only the laser unit that has been damaged.

Would it be a good idea to use the 4.7k focus resistor while testing the new laser? And can I then check somehow that the subzero fix works before removing the 4.7k focus resistor?

Sorry for bargin in with a stupid user misstake in your thread.
Thank you for your help and a very nice clean fix. (if properly carried out by the user)

[summ0ne]

:-)

apply the 4.7k and the subzero to be safe
if theyre applied, youre safe and dont have to think about any wierd malfunctions resulting from your previous mishap

[ShadowKnyght]

Summ0ne - just to back up what was said by dungbeetle (I know him) I have used your fix when it was only the 1 resistor and had no problems but my install using both the focus and the tracking resistor ended up with the tracking coil going open circuit and the focus coil dropping to 3 to 3.6 ohms from memory (did not test coil before install though so it may have been 3 already) - and the install was flawless...

Although personally I blame the customers use of the game GTA:SA which in my opinion chews lasers to death...

I did not have the problem that others have had with the resistors soldered to being damaged. I am about to install a replacement laser from divineo so cross my fingers the problem was the game and or a faulty Sony laser from manufacturing...

BTW - the pvr-802 lens will not fit in Oz stations as it is not wide enough to fit between the rods - you have to buy the entire optical block that they call ob802... I now have a useless lens and a complete block thanks to this fact - and they had stated 100% compatible with all 700xx stations... grrrr! ;)

[mikearama]

Yo summ0ne... almost May. How about them pcb's? Available yet? I'm itching to get some (summ?).

[summ0ne]

hehe, sorry, ive been away on vacation for the last 5 days.

The pcbs ARE in stock!

ive made a clean thread about it, check this:
http://www.ps2-scene.org/forums/showthread.php?t=35915

[sunny]

Where do we buy from ...? + is it ok with the wide laser as well...?
Cheers.

[summ0ne]

pm me or mail summ0ne@d-vices.com

i am also slowly building a reseller list http://subzero-chip.com
will update as they get stock
anyone interested in reselling, mail me.

[villasg]

I take my fixes .
i have install 5 until now.
Looks great protection.
Keep the good work summ0ne :)

[TGM]

i'm just interested in buying 2 pieces,where should i buy it from ?

[summ0ne]

check out the reseller area on http://subzero-chip.com

[sunny]

There are no re-sellers for U.K...?...small quantities needed...summone please liase with divneo uk...or mr modchip.

Cheers.

[davbere]

SomeOne on your description of the test mode for subzero fix it says remove wire, close lid switches, turn ps2 on...the laser head must not move- the laser must shine red. I tested and the laser does not shine red. was that a typo ?

[summ0ne]

when you cut the track - the laser head can not move - but the diode still shines

[davbere]

Thankd SoMeOne... just tried it again and the laser does flash... it just takes a couple of seconds to do so.
Great fix...thanks again,

David.

[danwood76]

Summ0ne I cannot get this to work correctly

PS2 Silvers boot fine and the laser head doesnt move in 'test mode'
its just DVD -R and +R that dont seem to play

If I remove the fix and add a wire over the broken track it plays DVDRs fine

I am assuming that my capacitor is too far from 1nF (I dont have a capacitance meter so I cannot measure) and that my_time<50 mS and is too short for DVDR media
Do you think I should buy a new cap or can I increase/modify the resistance to compensate?

The DVDRs I am using are Ridisk GO4 -R's and Traxdata (made by ritek) +R's

cheers summ0ne for the fix,
Danny

[xrenx]

I am assuming that my capacitor is too far from 1nF (I dont have a capacitance meter so I cannot measure) and that my_time<50 mS and is too short for DVDR media

1uf? yes all the pics show this size, in one of someone's latest post's he said to use a 2.2uf cap and thats what i have been using and works on dvdr

[summ0ne]

remember to use 33k and 2u2 or higher

[danwood76]

cheers summone and xrenx,
works perfectly now

regards,
Danny

[ivc]

I took the liberty to make a new SubZero Fix diagram since frankly the current one is somewhat confusing.

summ0ne is going to update the first post and the website with the new diagram asap.

Hope you like it :)

[EspeN]

IVC: That was a AWSOME diagram, maybe one of the best ive seen in a very very long time.. I hope summ0ne hire you to make diagrams for all his work :P

[summ0ne]

very nice IVC :D

i am posting your diagram on the site tonight, read my PM.

[ivc]

IVC: That was a AWSOME diagram, maybe one of the best ive seen in a very very long time.. I hope summ0ne hire you to make diagrams for all his work :P
very nice IVC :D
i am posting your diagram on the site tonight, read my PM.

Thanks =)
I've updated the picture with correct point labels now.

[EspeN]

IVC: Since ur from norway i guess u work @ digistore or hammar ?

[ivc]

IVC: Since ur from norway i guess u work @ digistore or hammar ?
Hehe, acutally no, I have my own buisness. Going to make it available for the rest of the country soon.
But don't trash this thread any more than necessary :)

[summ0ne]

http://subzero-chip.com/szX-new.jpg

thanks again