Nespresso CitiZ Capacitors Replacement

はじめに

If the device no longer makes coffee, but the buttons only flash (irregularly), the capacitors may be dead. The replacement is not too complicated, the parts are very cheap and easily available. Use MKP capacitors, (X2 rated), 680 nF with 22 mm distance and 220 nF 15 mm distance, minimum 275V. You will need to use a soldering iron for this repair. If you never have soldered before, you will find useful hints here.

必要な工具と部品

手順1 Dismantle Nespresso CitiZ

Nespresso CitiZ Capacitors Replacement, Dismantle Nespresso CitiZ: 手順 1、 1の画像 1

Never forget: pull the plug!
Remove all attachments: Water tank, capsule and cup drawer, drip tray.
The model shown is also equipped with a milk frother, remove that too.

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手順2

この手順で使用する道具：

iFixit Precision 4 mm Screwdriver Bit

$2.99

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The bottom is secured by oval head screws.
These screws have an oval head that makes them look like rivets (picture 2). You need to use a special bit - also available at iFixit - for their removal. Here a DIY guide. If the right bit is not available, it could be done with a pair of needle nose pliers. Nespresso wants to keep us out of our own machines!!!
Remove five oval head screws securing the large bottom panel.
Note: this panel is smaller on models without milk frother.

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手順3

Nespresso CitiZ Capacitors Replacement: 手順 3、 3の画像 3

The bottom panel is just snapped into place. Insert a metal spudger into the slots and lift the panel out. It sits quite tightly and you might use some force to get it out.

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手順4

Remove the large bottom panel.

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手順5

Use a spudger to slide off the two silicon tubes.

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手順6

Disconnect the two spade plugs on the blue and brown wires from the power switch. The two left ones remain.

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手順7

Remove four oval head screws from the small bottom panel.
Remove the main device from the base. It´s still connected with some wires, but this doesn´t bother much.

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手順8

Nespresso CitiZ Capacitors Replacement: 手順 8、 3の画像 3

The two colored side panels are only snapped into place. However, the latches sit very tight. You really need a lot of force. First lift the lower edge using a plastic opening tool.
Depending from the model it might help, when you first pry off the coffee spout. (See next step)
Unfold each of the side panels upwards and remove them.

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手順9

Insert a opening tool in the gap on the bottom of the coffee spout. Pry it off carefully.

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手順10 Expose PCB

Nespresso CitiZ Capacitors Replacement, Expose PCB: 手順 10、 1の画像 1

Geht the wires out of the holder.

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手順11

The plastic cover over the brewing unit is secured by two clips on each side. Use a metal spudger to pry them off.
Lift the cover slightly, but don't remove it, it is still connected by some cables.

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手順12

Open the lever and lift the cover out over the lever. Make sure that the cables are not strained too much.
Put the cover aside, but leave the cables connected.

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手順13

You will find the capacitors on the motherboard in the lower part of the device. The motherboard ist protected by several plastic covers.

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手順14

Carefully pull out the motherboard backwards.

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手順15

Nespresso CitiZ Capacitors Replacement: 手順 15、 3の画像 3

Flip off the white cover.
Take note of the colors of the wires. Pull the spade connectors and seperate the wires from the motherboard.
The wires on the other end of the motherboard cannot be removed.

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手順16 Capacitors replacement

Nespresso CitiZ Capacitors Replacement, Capacitors replacement: 手順 16、 2の画像 1

Nespresso CitiZ Capacitors Replacement, Capacitors replacement: 手順 16、 2の画像 2

The black plastic cover ist only snapped into place. Lift it up.
The motherboard now ist exposed. Lift it out of its black plastic case.

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手順17

The two blue capacitors must be replaced. The larger one is slightly glued to the motherboard.
Use a metal spudger to separate the larger one from the motherboard and fold it upwards.
The replacement capacitors have only very short connection wires. The 680 nF capacitor was therefore cut off so that it could be reconnected lying on its side.