Sharp PC-1403 Teardown

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There are 2 Philips screws on the back which must be unscrewed in order to remove the rear.

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After unscrewing the two screws on the back, carefully lift the bottom of the rear cover and push it upwards towards the top of the device

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On the left side there is a metal cover that you have to push up and then you can change the batteries

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Remove the 7 Philips screws and carefully lift the plastic center piece without damaging the cables for the piezo element. Also be careful not to lose the 2 springs that are at the top right and bottom left

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Now you can simply lift and remove the mainboard

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The assembly takes place in reverse order.