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Disassembling Philips Wake-Up HF35xx Main PCB

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Unscrew main PCB's plastic holder

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The "main PCB" is bottom-most of the circuit boards. It has the power input on it and the voltage regulator which often goes bad.

Remove the three screws at the base of the white plastic holder that is clipped into the main PCB. The circuit board will now lift slightly but be stopped by a ribbon cable.

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