Difficulty

Moderate

Steps

5

Time Required

                          10 minutes            

Sections

1

  • Replace Capacitors
  • 5 steps

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  • BackPetra KM 31.17

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Introduction

What you need

Step 1

              Replace Capacitors               
  • Remove the plastic water tank
  • Remove the iron sheet and the underlaying black spillover pan

Remove the plastic water tank

Remove the iron sheet and the underlaying black spillover pan

1024

Step 2

              Open               
  • Turn the machine upsidedown and lose the T10 screw right next to the power cord
  • Lose the four clips on the side. Use a spudger or a flathead screwdriver to gently bend the little plastic clip on the outer side of the rectangular hole inwards. Use your other hand and a spudger or a plastic card to lever off the coverage. Do this with all four holes.

Turn the machine upsidedown and lose the T10 screw right next to the power cord

Lose the four clips on the side. Use a spudger or a flathead screwdriver to gently bend the little plastic clip on the outer side of the rectangular hole inwards. Use your other hand and a spudger or a plastic card to lever off the coverage. Do this with all four holes.

Step 3

              Remove cords               
  • Disconnect all cords from the circuit board besides the two black ones on the right(marked black on the first picture); these are soldered and therefore cannot be disconnected so easily.

Disconnect all cords from the circuit board besides the two black ones on the right(marked black on the first picture); these are soldered and therefore cannot be disconnected so easily.

Step 4

              Desoldering               
  • Desolder the big yellow 0.68 microf capacitor
  • Solder in the replacement capacitor

Desolder the big yellow 0.68 microf capacitor

Solder in the replacement capacitor

Step 5

              (Optional) replace the other capacitors               
  • Sometimes the two smaller capacitors (0.047 microf) are also damaged. Test the machine after step four, if it doesn’t properly work, replace these two as well.

Sometimes the two smaller capacitors (0.047 microf) are also damaged. Test the machine after step four, if it doesn’t properly work, replace these two as well.

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

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                                                                                      5 other people completed this guide.                                             

Author

                                      with 2 other contributors 

                    benston                     

Member since: 06/08/2015

220 Reputation

                                      1 Guide authored                  



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Rainer Kraus - Jun 18, 2017

Reply

Die zwei kleineren Kondensatoren haben 0,047µF, nicht 0,47µF.

Ansonsten - Gute Anleitung, hab wieder eine funktionierende Kaffeemaschine.

Danke dafür!

benston - Jun 19, 2017

Du hast Recht, danke für den Hinweis

john collins - Jan 26, 2018

Reply

Smashing, Thank you. My 4yr old Petra was leaking from thé bottom and by removing thé bottom i saw thé filtre was blocked and was able to clear thé crud.

Annette - Aug 3, 2019

Reply

Hallo, ich habe sowas noch nie gemacht (Hausfrau im fortgeschrittenen Alter :-) möchte aber meine Petra retten. Lötkolben ist bestellt, die Maschine ist geöffnet aber jetzt scheitere ich daran, dass ich nicht weiß, wie ich die Kabel abmachen soll! Gibt es da eine Trick? Die sitzen ziemlich fest und ich möchte nichts kaputt machen.

Annette

Annette - Aug 16, 2019

Reply

Wooohoooo!!!

Das alte Mädchen läuft wieder - mit einem Ersatzteil für 93 Cent!

Ich (58 Jahre und noch nie vorher gelötet) habe es nach Deiner Anleitung geschafft.

Dankeschön!