[FAQ] Plextor PX-755A\760A\SA Refurbished -Wymiana OPU

[czary2mary]

Napisany przez Leman39

Czyli lepiej brać od dawców?

Albo wiedzieć gdzie \ od kogo kupować

[czary2mary]

HP CD-R Made in Tajwan CMC 97m26s66f
Plextor PX-760A Refurbished fw.1.07
ImgBurn 2.5.8.0 x4

[Kirby]

Hello all,

i replaced the Laser in my Plextor 760a. My Problem is, the Plastic that drives forward and back is broken.

Where can i get this piece of plastic?
Maybe someone with a 3D Printer can make a new one for me.

I added two Pictures.

Greetings Kirby

[czary2mary]

Difficult case ... you can't buy a new one anywhere.
Only from damaged old Plextor PX-755 \ 760 models you need to look. On the 3D printer you need to make an exact sketch with dimensions .. it will certainly cost a lot ...

[Stingray]

Hello experts, could you please advice how to crossflash 755 to 760.
Please see the picture - I take PX760A (removed from a factory USB box) but it recognized as PX755.
The warranty sticker non damaged

[czary2mary]

That's how it was . The PX-755 was no longer produced, and the USB/UF version was fitted with a factory-installed PX-760 with the PX-755's software. Unfortunately, no tool has yet been created for Sanyo chipsets. Modified firmware from the 760 cannot be installed via the bootcode.

[Stingray]

Napisany przez czary2mary

That's how it was . The PX-755 was no longer produced, and the USB/UF version

Thank you. I thought so too. But I didn't think it would be difficult to convert them into each other.

[NightRanger]

hi, sorry for asking always for help
i bought an used px760a with only 291 disc loaded. (i thought was quite low, my old px716sa broke at 2200 disc loaded )
it only read original cd-rom. it doesn't read and write cdr and dvdr.

qpxtool says: "warning found locked Plextor device! quality check and some other features will not work" [ but i don't thinkg this has nothing to do with px760 not burning cdr/dvdr ]

imgburn says "tracking servo failure" when i insert a new dvd-r

any suggestions? should i have to try that OPU change too?

google-translated: Cześć, przepraszam za ciągłe prośby o pomoc. Kupiłem używaną nagrywarkę px760a z załadowanymi tylko 291 płytami. (Myślałem, że to dość mało, ponieważ moja stara px716sa zepsuła się przy 2200 płytach).
Czyta tylko oryginalne płyty CD-ROM. Nie czyta ani nie nagrywa płyt CDR ani DVD-R.
Qpxtool wyświetla komunikat "warning found locked Plextor device! quality check and some other features will not work" [ale nie sądzę, aby miało to związek z tym, że px760 nie nagrywa płyt CDR/DVD].
Imgburn wyświetla komunikat "tracking servo failure" po włożeniu nowej płyty DVD-R.
Masz jakieś sugestie? Czy powinienem również spróbować wymienić OPU?

[czary2mary]

Napisany przez NightRanger

hi, sorry for asking always for help
i bought an used px760a with only 291 disc loaded. (i thought was quite low, my old px716sa broke at 2200 disc loaded )
it only read original cd-rom. it doesn't read and write cdr and dvdr.

qpxtool says: "warning found locked Plextor device! quality check and some other features will not work" [ but i don't thinkg this has nothing to do with px760 not burning cdr/dvdr ]

imgburn says "tracking servo failure" when i insert a new dvd-r

any suggestions? should i have to try that OPU change too?

google-translated: Cześć, przepraszam za ciągłe prośby o pomoc. Kupiłem używaną nagrywarkę px760a z załadowanymi tylko 291 płytami. (Myślałem, że to dość mało, ponieważ moja stara px716sa zepsuła się przy 2200 płytach).
Czyta tylko oryginalne płyty CD-ROM. Nie czyta ani nie nagrywa płyt CDR ani DVD-R.
Qpxtool wyświetla komunikat "warning found locked Plextor device! quality check and some other features will not work" [ale nie sądzę, aby miało to związek z tym, że px760 nie nagrywa płyt CDR/DVD].
Imgburn wyświetla komunikat "tracking servo failure" po włożeniu nowej płyty DVD-R.
Masz jakieś sugestie? Czy powinienem również spróbować wymienić OPU?

The laser focus system is damaged. The laser needs to be replaced.

[NightRanger]

Napisany przez czary2mary

The laser focus system is damaged. The laser needs to be replaced.

so if i try to replace the opu with one from a sony g120a or a nec-3550a as explained in the first message of this thread, it should work again?

[czary2mary]

Napisany przez NightRanger

so if i try to replace the opu with one from a sony g120a or a nec-3550a as explained in the first message of this thread, it should work again?

The LiteOn/NEC laser must be in perfect condition, high-power, and have similar calibration data. Sometimes it's necessary to "try and test" several units to achieve a satisfactory result.

[Stingray]

Napisany przez czary2mary

have similar calibration data.

do you mean similar resistance of 4 variable resistors?

[misiozol]

No, calibration data is stored internally.

[Stingray]

Napisany przez misiozol

No, calibration data is stored internally.

Napisany przez czary2mary

and have similar calibration data.

Guys, how can we find out the calibration data?


I usually tested the donor and then simply replaced the laser unit, and it worked. Sometimes, under the control of an ohmmeter, I adjusted the adjustment resistors and looked at the scan results.

[NightRanger]

Napisany przez Stingray

Guys, how can we find out the calibration data?

i'm curious about that too

Napisany przez Stingray

Sometimes, under the control of an ohmmeter, I adjusted the adjustment resistors and looked at the scan results.

can you explain this one better, where is "adjust the adjustment resistors"? and how should i use the ohmmeter with that?