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Kennex 5004 Projector Gear Replacement
Ecuval and one other contributor
Last updated on Sep 2, 2026
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Introduction
Go to step 1 ↓What a disappointment when, after just a few slides, the changing mechanism stops working.
Follow this guide to disassemble the projector and replace the faulty gear.
The only difficulty is obtaining the replacement part. It is perfectly possible to 3D print it using PLA+ material.
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Remove the 5 SL5 screws accessible from the bottom of the device.
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Two 4 x 22 mm SL5 screws.
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Three 4 x 50 mm SL5 screws.
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With the five screws removed, rotate the lower case away from the power cord to move it out of the way.
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Remove the three 3 x 12 mm PH1 screws.
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By inserting the screwdriver through the hole in the rubber-tired wheel closest to its axle, remove the 3 x 7 mm PH1 screw with its 3 x 10 x 0.6 mm washer.
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By inserting the screwdriver through the hole furthest from the wheel axle, remove the 3 x 12 mm PH1 screw.
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Remove the three 3 x 7 mm PH1 screws securing the autofocus gear motor.
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Remove the gear motor.
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Remove the 3 x 10 mm PH1 screw securing the circuit board.
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Remove the 3 x 7 mm PH1 screw securing the light dimmer triac heat sink.
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Remove the 3 x 12 mm PH1 screw securing the board.
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Lift the board.
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Remove the 3 x 10 mm PH1 screw securing the heat sink bracket.
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Remove the heat sink bracket.
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Carefully lift the motor-cooling fan assembly, moving the various wires and the terminal block with fuse holder out of the way.
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Still being careful not to pull on the wires, the assembly can be set down upside down.
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Remove the 3.5 x 7 mm countersunk SL5 center screw from the ring gear.
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Remove the turntable sitting on the ring gear.
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Remove the ring gear.
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Tool used on this step:Tweezers$4.99
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The support for the wheel-sprocket assembly can now be removed.
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Using tweezers, pull the end of the return spring off its anchor pin.
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Free the gear-wheel assembly by turning it and sliding it toward the motor.
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To reassemble your device, follow the instructions in reverse order.
It is best to apply a little thermal paste to the triac heat sink.
