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iTeufel Air defective | Standby LED does not light up

Introduction

A common error with the iTeufel Air is the defect of the 5V power pack for the power supply of the main board. This can be recognized by the fact that the iTeufel Air's standby LED no longer lights up. Normally, when the iTeufel Air is plugged in, the standby LED should light up orange. The cause of the defect in the 5V power supply is a defective diode (P6KE 200A) on the circuit board, which leads to failure of the power supply.

Note: These instructions are intended for specialists with electrical engineering experience.

If you are not a specialist, a repair in a repair cafe or similar is recommended! The repair involves working on the main board, which has potentially lethal voltages of 230 V!

What you need

  1. iTeufel Air defective | Standby LED does not light up, opening the case: step 1, image 1 of 3 iTeufel Air defective | Standby LED does not light up, opening the case: step 1, image 2 of 3 iTeufel Air defective | Standby LED does not light up, opening the case: step 1, image 3 of 3

    • Open the iTeufel Air by prying open the speaker cover on both sides with a pry tool so that the cover detaches from the rest. It is recommended to use the plastic lifter at the points marked in red and carefully lift the cover 2-3 cm so that the adhesive strips detach from the cover.

    • If the cover doesn't come off with a plastic pry bar, you can gently try it with a small flathead screwdriver

    • If you have loosened the cover on one side, fix the cover so that it remains open, e.g. with the plastic lifter and loosen the cover on the other side as well.

    • Before you start, unplug the iTeufel Air from the socket!

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  2. iTeufel Air defective | Standby LED does not light up: step 2, image 1 of 1

    • Now open the front cover by lifting it up with the plastic lifter between the black cover and the white frame. The cover is glued to the housing at the 4 points marked in red.

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  3. iTeufel Air defective | Standby LED does not light up: step 3, image 1 of 2 iTeufel Air defective | Standby LED does not light up: step 3, image 2 of 2

    • Now unscrew the loudspeakers from the housing with a PH 2 screwdriver.

    • Then lever the cover with the speakers off the housing by lifting the black cover slightly at the points marked with the arrows using a plastic lifter.

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  5. iTeufel Air defective | Standby LED does not light up: step 4, image 1 of 1

    • Now carefully lift off the plate with the loudspeakers and place them in front of the housing.

    • Be careful not to tear off the cables. The cables to the loudspeakers may have to be brought out from under the bass reflex tubes.

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  6. iTeufel Air defective | Standby LED does not light up: step 5, image 1 of 3 iTeufel Air defective | Standby LED does not light up: step 5, image 2 of 3 iTeufel Air defective | Standby LED does not light up: step 5, image 3 of 3

    • Now the bass reflex tubes have to be removed from the housing. These are glued all around the white housing. The adhesions can be carefully cut off with a knife.

    • The best way to push the bass reflex tube out of the white housing is from the inside to the outside.

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  7. iTeufel Air defective | Standby LED does not light up, Unscrew the power pack: step 6, image 1 of 2 iTeufel Air defective | Standby LED does not light up, Unscrew the power pack: step 6, image 2 of 2

    • Now unscrew the circuit board of the power supply with a PH 2 screwdriver.

    • Before you remove the circuit board, disconnect the circuit board connector for the power supply (black cable) and the white circuit board connector to the main circuit board.

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  8. iTeufel Air defective | Standby LED does not light up, Power supply repair: step 7, image 1 of 3 iTeufel Air defective | Standby LED does not light up, Power supply repair: step 7, image 2 of 3 iTeufel Air defective | Standby LED does not light up, Power supply repair: step 7, image 3 of 3

    • The defective diode is marked with the red circle. Replace this with a soldering iron for an identical diode (P6KE 200A) and pay attention to the polarity of the new diode when installing

    • A defective diode is not always visually recognizable. If so, the diode should be unsoldered and checked using the diode test mode of a multimeter.

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  9. iTeufel Air defective | Standby LED does not light up, Another cause of error: step 8, image 1 of 3 iTeufel Air defective | Standby LED does not light up, Another cause of error: step 8, image 2 of 3 iTeufel Air defective | Standby LED does not light up, Another cause of error: step 8, image 3 of 3

    • If the diode is functional, other components of the 5V power supply may also be defective.

    • In the event of overvoltage damage (e.g. lightning strike), the following components can be defective: fuse (5mm grid), IC switching power supply (TNY 280 PN) and the bridge rectifier (on the back of the circuit board). These all need to be replaced.

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Conclusion

Work the steps in reverse order to reassemble your device.

2 other people completed this guide.

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Felix

Member since: 03/19/22

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4 Comments

Schritt 8 - das ist kein Optokoppler auf dem 2ten Bild sondern ein Brückengleichrichter.

Optokoppler sind 3 stück unten - aber an einer anderen Position.

Gruß Andreas

Andreas - Reply

Ja klar stimmt, habs korrigiert ;)

Felix - Reply

Thanks for this guide !

In my case the culprit was the 1000uF cap

faxmodem - Reply

Vielen Dank für die sehr visuelle Reparier-Anleitung, ist super gemacht!!

Da mein iTeufel auch nicht mehr funktioniert, werde ich der Anleitung folgen, habe aber folgende Fragen. Ihr schreibt: Bei einem Überspannungsschaden (z.B. Blitzeinschlag) können folgende Komponenten defekt sein: Sicherung (5mm Raster), IC Schaltnetzteil (TNY 280 PN) und der Brückengleichrichter (auf der Rückseite der Platine).

Ich habe leider keine elektronischen Vorkenntnisse, traue mir zwar zu, die Komponente aus- und wieder einzulöten, aber ich weiss nicht, wie ich die korrekten Komponenten bestelle. Die Diode P6KE 200A und das Schaltnetzteil TNY 280 PN sind einfach, sie haben dankenswerterweise technische Codierung, existieren solche Codierungen auch für die Sicherung (5mm Raster) und den "Brückengleichrichter".? Dazu noch die Frage, was ist der 1000uF cap, der von @faxmodem erwähnt wird? Ist das die Sicherung? Habe mal "Sicherung 5mm Raster" in einem Elektronik-shop eingegeben, da gibt es 43 verschiedene Referenzen ;)

Danke.

Daniel

Daniel - Reply

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