Difficulty

Moderate

Steps

6

Time Required

                          30 minutes

Sections

1

  • Philips Wake-Up HF3531/01 Disassembly
  • 6 steps

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Introduction

Purpose of this was to install an antenna jack (BNC) to attach a telescopic antenna or roof aerial.

What you need

Step 1

              Start
  • There is a screw under the shiny UL sticker. Remove the sticker and screw to remove this bottom panel.
  • There are two tabs holding the panel into the clock/light, so you might have to wiggle the panel forward and out to remove it.

There is a screw under the shiny UL sticker. Remove the sticker and screw to remove this bottom panel.

There are two tabs holding the panel into the clock/light, so you might have to wiggle the panel forward and out to remove it.

1024

Step 2

              Prying open
  • Flipping the light upside down will present a small section of the bezel that can be pried upward. It is a small plastic strip with hooks that have to be disengaged to be removed.

Flipping the light upside down will present a small section of the bezel that can be pried upward. It is a small plastic strip with hooks that have to be disengaged to be removed.

Step 3

              Remove the button ring
  • We can finally unscrew two more Philips head screws to remove the button ring.

We can finally unscrew two more Philips head screws to remove the button ring.

Step 4

              Front screen shield
  • Now the screws holding the front screen shield need to be removed and the shield can be pulled away to the front.
  • Screw organization note for later: these screws have pointed ends
  • Take care not to damage the internal screen.
  • Unscrew the four screws holding the inner screen assembly in place.

Now the screws holding the front screen shield need to be removed and the shield can be pulled away to the front.

Screw organization note for later: these screws have pointed ends

Take care not to damage the internal screen.

Unscrew the four screws holding the inner screen assembly in place.

Step 5

              Inner screen assembly
  • The inner screen assembly can be pulled out slightly to reveal tabs on each side that hold the assembly in.
  • Pry the back tabs inwards to release.

The inner screen assembly can be pulled out slightly to reveal tabs on each side that hold the assembly in.

Pry the back tabs inwards to release.

Step 6

              Remove the screen
  • The screen is connected to the plastic domed back with holes. There are two screws at the back of the base of this domed panel. Remove screws to remove screen.
  • Set screen panel aside for safe keeping.
  • More to see and modify…

The screen is connected to the plastic domed back with holes. There are two screws at the back of the base of this domed panel. Remove screws to remove screen.

Set screen panel aside for safe keeping.

More to see and modify…

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                                                                                      37 other people completed this guide.

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                    Max

Member since: 11/13/2012

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Takkens Shoes - Mar 2, 2019

Reply

Awesome teardown except for one little thing…

The factory sticker shows this is a 3530 which may not be different from a 3520. However, the bottom plate screw MUST be removed in order to separate the two halves. It is a little confusing saying “The bottom panel does not help gaining access to more screws. See next step.” I took that as being unnecessary, so skip.

johnstone1889 - Apr 23, 2019

Reply

I was able to fix my speaker inside it i got this alarm at a thrift store for cheap turns out the one wire just needed a better conenction to get working thank you for the steps to get to it

paulamicel - Dec 16, 2019

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The first photo of step 5 is a little misleading, it looks like you are unscrewing something, it made me look for the screws

Other than that this was very helpful, thank you

heleen - Apr 4, 2020

Reply

Thanks so much for this guide! The speaker in my H3510 had suddenly stopped working. I managed to take it apart with this guide. It turned out one of the wires on the speaker had come loose. We soldered it back on and that fixed it!

pibi - Sep 10, 2020

Reply

Thx!. Now I am able to fix the power cord which was often unplugged. So i soldered the power cable fixed to the pcb.