|What follows is a disassembly guide that I created to replace the fans in my projector. I have placed it here on my site hoping it may be useful to other people. While I only needed to replace my fans, this alone requires almost complete disassembly of the projector thus you can see every step required to remove every part from the projector. I am hoping this guide will help you to repair different areas of your projector. It is still a work in progress so I am sure there are typos, spelling errors and missing information. I am working on getting this page finished, if you have any suggestions, corrections or questions you can email me: david at functionalchaos dot net.|
***WARNING - I AM NOT CERTIFIED TO REPAIR THE PE7700 OR ANY PROJECTOR. IT IS POSSIBLE TO DESTROY A WORKING PROJECTOR BY TAKING IT APART. IF YOUR PROJECTOR IS STILL UNDER WARRANTY YOU MAY LIKELY VOID YOUR WARRANTY BY TAKING IT APART. I AM NOT RESPONSIBLE IF YOU USE THE INFORMATION BELOW AND RUIN YOUR PROJECTOR.***
|Preparing and Removing the Lamp|
|Create a work area large enough to layout all the parts your going to be removing.
A kitchen table would work great. You will need a #2 Philip's, a few jewelers size flat heads and a pair of needle nose
pliers may come in handy. Begin by first taking out the lamp. Your going to want to keep the screws you remove in each
step with the part you remove in that same step. If you do not, you may have trouble figuring out what type of
screw went where.
A. Remove the lamp cover screws from the side of the projector without venting wholes.
|B. Remove the lamp retaining screws.|
|C. Gently slide the lamp out.|
|Let the Disassembly Begin!|
|STEP 1 - Begin by turning the projector over so that it is sitting on its top with the bottom facing you.
A. Remove the screw holding on the silver plastic lens cover.
|B. Gently lift up on the cover and remove the wire plug attached to the small PC-board. Also remove the soft black gasket seal around the lens.|
|STEP 2 - Remove the front fan cover.
A. Remove the three small rubber covers over the fan cover screws with a small jewelers flat head screw driver.
|B. Remove three screws from under rubber covers.|
|C. Gently lift and pull out (down) on front fan cover to remove.|
|STEP 3 - Slide the filter out.
|STEP 4 - Remove the plastic top cover.
A. Remove the 7 screws from the bottom of the projector.
|B. Turn projector over and gently pull forward and up on top cover to remove.|
|C. Turn left side of cover in a clockwise direction, keeping the right side close to the base and then remove the main wire plug to control panel PC-board.|
|Here is a picture of the projector with the cover off. I have identified the main areas of component location. Please note the terms used are my own and not those BenQ or anyone else may use.|
|STEP 5 - Remove the rear/side cover surround.
A. Remove the 2 screws from the back of the projector below the video inputs.
|B. Remove the 2 screws from the rear/bottom of the projector below the power input/switch.|
|C. Remove the 2 screws from the front left and right sides of the projector inside the base.|
|D. Pull gently down and out on the sides of the surround while popping up the tabs on the top/rear of the projector to remove the surround.|
|E. Remove to wire plugs and screw holding metal shield and ground screws so surround can be removed from unit.|
|STEP 6 - Remove the Main PC-BOARD.
A. Remove the remaining 4 screws from the PC-board metal shield and then lift shield off gently.
|B. Remove remaining wire plug and color wheel ribbon cable from front end of PC-board, use the following 3 images as a guide.|
|C. Gently lift the PC-BOARD from the mounting area, there are two connectors that must pop loose on the bottom of the board, one to the video input board and one to the lens board.|
|STEP 7 - Remove the Lamp and Color Wheel Housing.
A. Remove the screw holding the PSU fan cover on in the middle of the housing..
|The Lamp PSU fan exposed.
|We can see on this projector that the color wheel is broken. The following four pictures show the broken color wheel as well as pieces of the color wheel I found floating around in the case.|
|B. There are several screws that need to be removed to get the housing off. You start by removing the Lamp PSU housing, then the Lamp and Color wheel housing come off. The digram below shows the locations of screws and plugs that must be removed in the next steps.|
|C. Start by removing the screw holding the Lamp Power plug into the top of the Lamp Housing.|
|Remove the Lamp Power plug.|
|D. Remove the screws and plug securing the Lamp PSU.|
|Remove Lamp PSU carefully.|
|E. Remove the screws holding the Lamp and Color Wheel Housing.|
|Gently separate the two housing half's being careful of the lamp temp sensor/lamp door open switch cable that is still connected to the bottom of the case (cable marked below).|
|Lay the left housing on it's side so you can detach the for mentioned cable plug and switch.|
|Remove the screws and plug holding the switch in place.|
|Remove the switch.|
|Step 8 - We can finally remove the Fans!
Just lift up on them, no screws.