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Tutorial - Hitachi


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#1 RDC

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Posted 20 July 2007 - 07:35 PM

First take the 360 apart and remove the DVD drive. If ya can't find this sort of tutorial on yer own or haven't already gotten this far then ya should stop now and go look that up first, then come back and read thru this a few times before trying it. Replacing the laser isn't a huge or complex deal and requires minimum tools (couple of Phillips head screwdrivers, #2 and #0 and a Soldering Iron) but it's still something that needs to be done correctly and has it's risks.

First remove the 6 screws on the bottom of the drive, these hold the case together. Once you have them out, remember the 2 coarse thread screws (green arrows) go in the middle, remove the bottom cover and then pull the top cover off.

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Once ya have the case apart you need to unplug the flex cable that goes to the Laser first. Be careful and make sure you have a firm even grip on the cable with your thumb and index finger and keep the laser in place with your other hand as it will want to move back when you pull on the cable if not held in place. Then pull it straight out, in a motion towards the back of the DVD drive, NOT upwards or any other direction, towards the back of the DVD drive.

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Once you have that removed, flip the drive over and unplug ONLY the Spindle motor and Tray motor cables, just pull them straight out same as the Laser's cable. We'll get to the Sled motor cable in a second and the one for the Laser and you've already unhooked at the other end, plus it's taped to the board and removing it when you don't have to could possibly damage it.

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Now be very careful with this part so you don't ruin the flex cable that goes to the Sled Motor. There is a plastic clip that needs to be pushed to the side just a little bit so this side of the Logic board will lift free. Push it over and pull the board up just enough to clear the clip.

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Now slide the board over slightly so you can get a good grip on the cable and unplug it, the same as ya did the others.

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Once ya have the Logic board free, set it out of the way for now someplace safe. Now there is 1 screw you need to remove the get the drive rail free before the Laser assembly will come out.

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Once the screw is removed lift the rail up at the end where the screw was and pull towards the back of the DVD drive when it's clear of the notch it sits in, and out the entire laser assembly should come. BE CAREFUL of the spring on the white part there, it's to keep tension on the Sled motor's worm gear so it can move the Laser back and forth, just don't let the spring go flying away from ya. If it comes out it's easily put back in place, provided ya didn't loose it.

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Now you need to prepare your new laser before installing it. Be careful as to not touch the lens as by now you have grease on your hands form taking the drive apart and touching the rails and such. If the Laser is from another working drive you don't have to do this as it's already been removed, but if you have a brand new Laser this will need to be done or it will not work. Get out the soldering iron and warm it up, then remove this solder bridge here so the points are cleared. Use solder wick if you wish, but just a pass or 2 over the spot is usually enough to clear the contacts of the solder. Just make sure you have it all off of there and do NOT go leaving the Soldering Iron on there for too long, this should only take a second or two at most.

ANTI-STATIC POINT (New Laser)
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ANTI-STATIC POINT REMOVED (Read for Install)
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Once you have the new Laser's anti-static point removed you need to take the old Laser and remove the Tensioner (that white part with the spring) and the drive rail and install them on the new Laser. The drive rail just slides right out and you can place it in the new Laser in either direction, it'll work either way. Then remove the Tensioner, there is 1 screw that holds it onto the Laser, and install it on the new one.

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Once you have that all done the new Laser is ready to be installed. You can see better how this actually goes when doing it, but it's a pretty simple 4 step process to get the thing reinstalled properly that all sorta flows together in one step once ya know what you're doing.

STEP 1. Place the notched side of the Laser on the plastic rail there.

STEP 2. Put the metal rail into the notch where it was originally.

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Step 3. The Tensioner at this point isn't set back under the worm gear properly, worse yet it may have popped the spring loose in which case you need to remove the Laser, reinstall the spring in the Tensioner and start over. To seat the Tensioner just use your finger or a small screwdriver to push on it gently, you'll see it move under the worm gear and set into place as it should.

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STEP 4. Push the other end of the metal rail back into it's spot and then reinstall the screw you removed that held it in place.

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Once you have that done gently push the Laser assembly toward the center of the drive so you'll have room to reinstall the flex cable in a little bit.

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The rest of the "put it back together" is the opposite of the tear down. Take the Logic board and plug back up the Sled motor cable, careful to not get the end of the cable sideways or at some weird angle when plugging it back into the connector as it can be messed up easily. Reinstall the Logic board, there is notch on the side with the Sled motor cable and a place that it sits, then just push the other side down and the clip you moved earlier to release the board will catch and hold it in place.

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Plug up the Spindle motor and Tray motor cables, taking care with them as well.

Flip the drive back over and plug up the cable to the new Laser. Be very careful with this as well since it has quite a few connections on it and you don't want to mess any up at all. Just get it lined up straight and apply even pressure to reinsert it, you want it to go in square and not at an off angle either or you may cause damage to it.

Once ya have all that done just reinstall the case top and bottom, then put the screws back in and there ya go.

Edited by RDC, 20 July 2007 - 07:34 PM.


#2 RBJTech

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Posted 20 July 2007 - 08:16 PM

Perfect !

But needs a link here though RDC ... Tutorial Sticky wink.gif

#3 RDC

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Posted 20 July 2007 - 08:38 PM

Planning on getting around to that part after I do the Samsung one. Maybe tomorrow sometime, but these things just don't pop into existence. Well, here they do, but it's really a right mess and pretty time consuming to get decent pics and explain it well enough there should (hopefully) be no questions but not have so much info it's boring. wink.gif

#4 RDC

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Posted 21 July 2007 - 09:52 PM

Tutorial added to the Tutorials/FAQ/Guides/Information in 360 Case / Hardware Modding as well as leaving it here in 360 General Hardware, since it's a more common place for DVD repair questions and information.




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