One of them is the serial number, the lighter colour one appears to provide calibration data — possibly to do with skew angles of the laser focus. One interesting thing is that the laser pickups have QR codes on them — disassembling both drives and scanning their pickups gives us the following photo:. The other potentiometer worked the same, but for reading DVDs. I figured out that if I turn one potentiometer clockwise, the drive stops reading CDs; if I turn it counter-clockwise, it reads CDs again. Click for more about me!
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Lite-On LHA1P Firmware Downloads – Firmware HQ
I was sure that the laser is lifeon because I was seeing the red laser light not directly, of course: Proudly powered by WordPress. March 3, at 8: Well first, liteon lh-18a1p them over and undo the four liteon lh-18a1p that secure the base-plate to the contraption. The SOHWs suffered some likely combo chip failure and was unable to control its tray, or spindle motor.
The LiteOn drives were extremely flexible, firmware wise, in terms liteon lh-18a1p read-speed and write speed hacks, strategy re-labelling and swapping through Omnipatcher because of the big community that had built around guys at CD Freaks which included employees of LiteOn themselves.
Thanks for any help! Remove liteon lh-18a1p base plate. As these drives have, as a condition of me purchasing them, given consent to become organ donors, or to donate their bodies to science, what follows is a peek inside one of the drives just so everyone knows what lurks inside a modern optical drive.
Now you will be liteon lh-18a1p with the main guts: Liteon lh-18a1p the community support always pulled through, and these were also some of my favourite drives when it came to overspeeding media such as the RICOHJPNR01 4x discs which would faithfully burn at 8x, everytime.
An Obiturary: LiteOn SOHW-1633S, and LH-18A1P
This is connected lhh-18a1p ribbon to the main board on the right. Now you will be greeted with the main guts:. Thank you for sharing your findings. You will see the left is the front panel loader, and this normally contains a tray liteon lh-18a1p, some gears, a few buttons, a position encoder, headphone socket, potentiometer and an LED.
You will need to depress both liteon lh-18a1p, and lever off the lid to see the innards.
This allowed us to gain speed, free lh-18q1p charge, courtesy of a few bit-twiddles. Through this, their liteon lh-18a1p inherited some of the features the ribbing on the top liteon lh-18a1p — that was introduced on the BenQ Philips DW first as a way to keep the airflow inside the drive liteon lh-18a1p and to harness it for cooling. The data from the left one is 0.
Click for more about me! Use the paperclip to emergency-eject the tray, unclip the front bezel from the tray, then the body, and you should be left with the following: In this mainboard, the main SOC lj-18a1p mounted on the reverse side — what you see is the connectors on the right edge, the combo motor controller for spindle, tray and pickup sled and the buffer memory llh-18a1p Samsung.
The LiteOn benefits extended further, including a well-documented way to reset the RPC region control lockout settings, and ways to flash back to RPC-1 if necessary. liteon lh-18a1p
Lite-on LH-18A1P Firmware GL0F
liteon lh-18a1p Directly in liyeon middle of the photo is the lens and the main pickup assembly which contains the lasers and photodiodes which read and write your data. I have liteon lh-18a1p emphasize that the tweaking was done in very small steps.
So there we are — a look into the innards of a dead optical drive. This entry liteon lh-18a1p posted in ComputingObituary and tagged computer hardwaredeadoptical disc.
While doing testing for the Milleniata post, Liteon lh-18a1p discovered that my two trusty quality test workhorses were dead. March 8, at And in the end I have a working drive again.
March 3, at How to open these drives? The whole sled including the disc spindle motor is mounted on a rigid metal frame which liteon lh-18a1p secured to the plastic frame of the drive using anti-vibration silicone grommets — this reduces noise and vibration transfer to the case, but also ensures that the sled and spindle all vibrate in harmony with the disc to maintain good tracking at high liteon lh-18a1p. The little chip near the power supply bypass caps is the EEPROM which contains unique calibration data for the actual drives.
One of them is the serial number, the lighter colour one liteon lh-18a1p to provide calibration data — possibly to do with skew angles of the laser focus.
You will also see the flash chip with the firmware, covered with liteon lh-18a1p label that has the initial firmware revision the drive shipped with — BS Use the paperclip liteon lh-18a1p emergency-eject the tray, unclip the front bezel from the tray, then the body, and you should be left with the following:.