May 4, 2008 1:39 PM
updated: May 4, 2008 1:42 PM
Here's a quick and easy on the V700 series.
Pull off the front lower grill. Remove the screws to remove the plastic panel the Vol/channel buttons are attached to. This piece kinda slides up under the front upper cabinet. Removing that exposes the two screws that hold the front of the engine plate. You can remove those now if you want.
Precede to remove all the screws and take off the back cover. You'll see a large metal plate right in the middle. This not only provides support for the top but also is the attachment point for the rear of the engine plate. Remove all the screws, pull out and set aside.
Remove the 4 screws holding the ballast assy on at the back and also remove the single screw attaching the HV leads to the back of the lamp housing assy. Set aside. There is a plastic shroud piece located on the far right at the bottom of the engine housing. One screw is right towards the back end of the engine, the other is set further into the set. You'll be able to see it looking inwards. This plastic shroud, part of the air ventilation system, must be removed. Remove the 2 screws holding the lamp switch onto the back of the lamp housing and swing it up and out of the way.
Now comes something of the hard part. You'll notice wires running along the top side of the engine. There are approximately 7 plugs, 2 on the right side, 3 across the back and 2 on the left side that have to be unplugged. The wires will have to also be taken out of the relief clips that are mounted across the back and left side of the engine. There is also a single 3 wired plug on the left side (wire colors are yellow/Red and black if I recall) that are for an engine fan. That will have to be unplugged. Once the everything is unplugged and the wires are freed from the clips and out of the way you can begin to snake the engine out of the set. Gently work the thing out. Normally I get the left side out first. If you're meeting resistance at all STOP, you may have a wire harness or bundle snagged. Look for what's holding it up and get it out of the way.
Once you've gotten it out you'll need to take the metal mounting plate off the old engine and transfer it to the new. There are approximately 6-8 screws holding it on. IIRC, the lens shroud also has to be swapped. Look at the old vs the new to see which pieces get transfered. IIRC, there is a temp sensor on the new engine that needs to be plugged in as well. Again, look at the old engine and compare to see where it goes.
Don't forget to put the lamp in.
You're now ready to reinstall. I snake the right side in first. The whole install is a feel type of deal. You REALLY need to pay attention to the wire bundles on the left side of the engine so you don't snag them. It's tough to see in there and this is probably the hardest part of the job. The best way to tell when you've got the engine in correctly is by looking to see if the engine mounting holes at the front line up with the holes in the front cabinet (step 1 above)
If it's line up I normally attach the front screws in to hold the engine, then install all the plugs and re-run the wired bundles through the relief clips. Then proceed to reinstall all the parts you took off. Before turning the set on, make sure the back plate is installed so the engine is sitting right inside the set. You might have to do a little jacking of the top cabinet to get that plate all lined up.
Now, turn on the set and make sure it works. If all is well, proceed to put the back on and front.
BTW, this is all by memory. I don't know how good Hitachi is at showing disassembly of the engine in their manual. I basically learned how to remove the 700 series by trial and error.
Good luck.
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