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Disassembling Philips Wake-Up HF35xx Main PCB

Disassembling Philips Wake-Up HF35xx Main PCB

hackerb9 和另一个贡献者

最后更新于 December 11, 2024

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步骤 1 Start

Disassembling Philips Wake-Up HF35xx Main PCB, Start: 步骤 1 中的图像 1，3

Disassembling Philips Wake-Up HF35xx Main PCB, Start: 步骤 1 中的图像 2，3

Disassembling Philips Wake-Up HF35xx Main PCB, Start: 步骤 1 中的图像 3，3

There is a screw under the shiny UL sticker. Remove the sticker or pierce it to unscrew and remove this bottom panel.
There are two tabs holding the panel into the back of the clock/light. If the panel does not come out easily, gently wiggle a flat-blade screwdriver or spudger in the grill next to where the screw was to loosen it.

步骤 2 Prying open the ring cover

Flipping the light on its back will present a small section of the bezel that can be pried out. It is a small plastic strip with hooks that have to be disengaged to be removed.
Push the blade of the jimmy directly into the crevice above the cover. Once it has gone a few millimeters, tilt it to lift the cover slightly.
Slide the jimmy to the right side and press it against the latch to release it. Do the same for the left side.
A "jimmy" is essentially a small putty knife with a strong, slightly flexible blade.
Note: Despite the images shown, a spudger is not recommended as the fit is so tight it takes quite a bit of effort to insert and slide.

步骤 3 Remove the button ring

Disassembling Philips Wake-Up HF35xx Main PCB, Remove the button ring: 步骤 3 中的图像 1，3

Disassembling Philips Wake-Up HF35xx Main PCB, Remove the button ring: 步骤 3 中的图像 2，3

Disassembling Philips Wake-Up HF35xx Main PCB, Remove the button ring: 步骤 3 中的图像 3，3

We can finally unscrew two more Philips head screws to remove the button ring.
Tip: Lift one end of the ring, tilting it toward the back of the alarm clock. That will get the hooks out from under the rear rim so you can start removing it..

步骤 4 Front screen shield

Disassembling Philips Wake-Up HF35xx Main PCB, Front screen shield: 步骤 4 中的图像 1，2

Disassembling Philips Wake-Up HF35xx Main PCB, Front screen shield: 步骤 4 中的图像 2，2

Now the six screws holding the front screen need to be removed and the screen can be pulled away to the front.
Take care not to damage the internal screen.

步骤 5 Inner screen screws

Disassembling Philips Wake-Up HF35xx Main PCB, Inner screen screws: 步骤 5 中的图像 1，1

Remove the four screws holding the inner screen assembly in place.
Screw organization note for later: these screws have pointed ends

步骤 6 Inner screen assembly

Disassembling Philips Wake-Up HF35xx Main PCB, Inner screen assembly: 步骤 6 中的图像 1，3

Disassembling Philips Wake-Up HF35xx Main PCB, Inner screen assembly: 步骤 6 中的图像 2，3

Disassembling Philips Wake-Up HF35xx Main PCB, Inner screen assembly: 步骤 6 中的图像 3，3

There are two tabs that hold the assembly in on the bottom left and right sides.
Using a jimmy — or any flexible, flat, metal tool, such as a putty knife — press the back tabs inwards to release.
Note: Do not be surprised if you have to push hard.
Tip: If you pull the inner screen assembly out slightly, you can see the tabs better. However, it puts pressure on the latches making them more difficult to release.

步骤 7 Remove back cover (Optional but recommended)

Disassembling Philips Wake-Up HF35xx Main PCB, Remove back cover (Optional but recommended): 步骤 7 中的图像 1，2

Disassembling Philips Wake-Up HF35xx Main PCB, Remove back cover (Optional but recommended): 步骤 7 中的图像 2，2

Disconnect the speaker from the main circuit board.
The antenna (a long white wire) has a fragile solder connection to the main circuit board and care should be taken to not yank upon it.
Loosen the screw and washer inside the back cover by the speaker and unwrap the antenna wire that was pinned underneath. Pull the antenna all the way through so the back cover can be removed.
Alternately, you may simply pull only some of it through so that the wire is slack enough that the solder joint is at no risk.
Caution: The speaker and the buzzer connectors are the same so be careful when reassembling.

步骤 8 Unscrew main PCB's plastic holder

Disassembling Philips Wake-Up HF35xx Main PCB, Unscrew main PCB's plastic holder: 步骤 8 中的图像 1，1

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.

步骤 9 Detach ribbon cable

Disassembling Philips Wake-Up HF35xx Main PCB, Detach ribbon cable: 步骤 9 中的图像 1，3

Disassembling Philips Wake-Up HF35xx Main PCB, Detach ribbon cable: 步骤 9 中的图像 2，3

Disassembling Philips Wake-Up HF35xx Main PCB, Detach ribbon cable: 步骤 9 中的图像 3，3

The ribbon cable can be released by pulling forward the tabs on the sides of the connector. Now the circuit board can swing to the side.

步骤 10 Detach plastic holder

Disassembling Philips Wake-Up HF35xx Main PCB, Detach plastic holder: 步骤 10 中的图像 1，2

Disassembling Philips Wake-Up HF35xx Main PCB, Detach plastic holder: 步骤 10 中的图像 2，2

Unclip the four clips holding the circuit board to the plastic holder.
Be careful as the piezo clicker will still be attached to the holder.

步骤 11 Unplug power output

Disassembling Philips Wake-Up HF35xx Main PCB, Unplug power output: 步骤 11 中的图像 1，2

Disassembling Philips Wake-Up HF35xx Main PCB, Unplug power output: 步骤 11 中的图像 2，2

Unplug the power connector (brown-red-orange-yellow wires) from the main PCB.
The main PCB is now free to be worked on, but be aware that the FM aerial dangles from a solder connection and can break off.

结论

To reassemble your device, follow these instructions in reverse order.

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hackerb9

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