Thank you for sharing your findings. You will need to depress both clips, and lever off the lid to see the innards. March 3, at You will also see the flash chip with the firmware, covered with a label that has the initial firmware revision the drive shipped with — BS 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. Directly in the middle of the photo is the lens and the main pickup assembly which contains the lasers and photodiodes which read and write your data.
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LiteOn LHA1P vGL03 Writing Quality
How to open these drives? I have been able ,h fix the non-reading issue of my drive. This entry lh 18a1p posted in 118a1p lh 18a1p, Obituary and tagged computer hardwaredeadoptical disc.
March 3, at With that quick diagnosis, I take a moment to salute these fine drives, and send them onto their l towards the garbage. The whole sled lh 18a1p the disc spindle motor 18ap1 mounted on a rigid metal frame which is secured to the plastic frame of the drive using anti-vibration silicone grommets — this reduces noise and vibration lh 18a1p to the case, but also ensures that the sled and spindle all vibrate in harmony with the disc to maintain good tracking at high speeds.
I fixed the drive by tweaking the two potentiometers: This is connected by a wide ribbon to the mainboard below. Some of these contain ball bearings which make a wooshing sound when the disc spins up and down common for LiteOn drives which acts as a counterbalance against unbalanced discs washing machines actually have something similar as well!
You will also see the flash chip with the firmware, covered with a label lh 18a1p has the initial firmware revision the drive shipped with lh 18a1p BS Remove the base plate.
LiteOn LHA1P Specs – CNET
The other potentiometer lh 18a1p the same, but for reading DVDs. The little chip near the power supply bypass caps is the EEPROM which contains unique calibration data for the actual ly. The assembly itself is mounted on smooth lh 18a1p, driven 18s1p a stepper motor which is mounted below the sled. The LiteOn drives were extremely flexible, firmware wise, in terms of 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.
Through this, their drives inherited some of the features the ribbing on the top surface — that was introduced on the BenQ Philips DW first as lh 18a1p way to keep the airflow inside the drive quiet and to harness it for cooling. llh
An Obiturary: LiteOn SOHW-1633S, and LH-18A1P
Use the paperclip to emergency-eject the tray, unclip the front bezel from the tray, then the body, and you lh 18a1p be left with the following: The SOHWs suffered some likely combo chip failure and lh 18a1p unable to control its tray, or spindle motor. This allowed us to gain speed, free lh 18a1p charge, courtesy of a few bit-twiddles.
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: Thanks for any help!
March 3, at 8: The data from the left one is 0. I lh 18a1p out that if I turn one potentiometer clockwise, the drive stops reading CDs; lh 18a1p I 181ap it counter-clockwise, it reads CDs again. You will see the left is the front panel loader, and this normally contains a tray lh 18a1p, some gears, a few buttons, a position encoder, headphone socket, potentiometer and an LED.
I have no idea, but if somebody does, please do go ahead and write a reply. This is connected by ribbon to the main board on the right. But the community support always pulled lh 18a1p, and these were also lh 18a1p of my favourite drives when it came to overspeeding media such as the RICOHJPNR01 4x discs which would faithfully burn at 8x, everytime.
Unfortunately, I cannot tell you which potentiometer does lh 18a1p — they could be power, focus, tilt or something 1a81p altogether. Now you will be greeted with the main guts: This is the underside of the drive.
And in the end I have a working drive again. Well first, turn them lh 18a1p and undo the four screws that secure the base-plate to the contraption.
Use the paperclip to emergency-eject the tray, unclip the front bezel from the tray, then lh 18a1p body, and you should be left with the following:. Proudly powered by WordPress. While doing testing for the Milleniata post, I discovered that my two trusty quality test workhorses lh 18a1p dead.