There are three things it could be, the motor that drives the brewing unit, the brewing unit itself or the pressure relief valve. You need to operate while looking inside with a torch to see what is happening. This is done with the back, the top and the beans side side cover removed for visibility.
I have a similar issue, from what I have been able to diagnose after the coffee beans are ground the motor should move the brewing unit up but that isn't happening. The motor seems to be fine as it works when I manually give it voltage. I feel that there is some component that tells the motor to work after the grinding is complete is malfunctioning. Any idea what could this component be?
The logic board can be confused by the on/off state of the cam wheel following micro switches on the motor assembly. the micro switches are a very ordinary type, the particular part number specifies force details and other particulars not needed, and only the Normally open contacts are actually used. Just choose one from the same size series with the correct size faston tabs for your unit. some units were made using 1/4" and others using 3/16". Gold contacts are nice, but the units are now over 10 years old and unlikely to last long enough to be fail no matter which is chosen. a thin residue of food safe silicone grease on the cam wheel will keep the switch actuator from wearing down, a more common cause of failures. if the cam wheel and switches are all good there's a second problem that appears as the units get old.
The motor is powered through Relay 1&2 at the top left of the power board. The relay coil current passes through a pair of contacts on the drip tray tab closes to the plastic extension that operates a micro switch, the other drip tray contact is used to sense liquid. The logic board uses the micro switch to sense drip tray present/absent. The use of 2 contacts on one tab blocks brew unit motor relay drive current when the drip tray is not present .That function is not needed because the logic board senses tray present/absent using the switch and doesn't drive the relays to power the motor if it is absent. When the contacts are slightly dirty, orders of magnitude less resistance than drip tray liquid, the relay drive current becomes insufficient. The contacts can be cleaned on the *under* side of the drip tray and the contact support tray. The contact support tray is retained by tabs at the rear sides. Press them inward to withdraw the contact support tray. The two contacts on the one tab can be interconnected to prevent the superfluous and unreliable interconnect from impairing the relay drive current.
Its also possible but less likely that the transformer 15v or 9v AC secondary has failed or the full wave diode bridges formed by D1-D4 and/or D5-D8 have a bad diode, the relay coil turn-off reverse voltage snubber diodes D9 & D10 could have failed, or the zener diode at the the top/left of the board failed. The relays themselves are a very reliable Panasonic type but no longer made, if one has failed there are equivalents available, but these are not the 1st thing to investigate.
The Logic board that drives the relays is not available as a replacement part. If the PIC controller output is not driving the relays it would be necessary to download the PIC's ROM and program a replacement before installing it. Most DIY repair people will require professional assistance to do that. The 5 pin diagnostic connector under the plug mark graphically as no-touch is connected to the JTAG scan port that would be used to do that. search google for a Jura series 3 micro schematic for details.
All of these super automatic coffee makers are actually made by one, and only one, Swiss company. Different marketing brands select features and customize the styling of the current version of the coffee maker engine. The reviews that compare the resulting coffee and find significant differences are at best examples of "confirmation bias", and at worst influenced by incentives provided by brand that was preferred.
That said, the power board and logic board found in the Krups XP9000 is a different shape from that used in any other brand based on the same revision of the main design. The interchangeability of the components is very useful for the components found in the brewing path, of limited use for anything that was customized for Krups like the drip tray and water tank for which other OEMs have slightly different versions that can be adapted by an adept craftsman, and on no use for components totally unique to the Krups XP9000, like the outer case. (When an MS-XXXXX p/n is unavailable, look at the parts for other 2007 models. A drip tray with the tabs and switch finger on the left instead of the right or a coffee grinder with un-needed parts for example.
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SOURCE: the hot water and steam commes inside the machine KRUPS FNF1
The mashine dont pull water from the water container and it ask us to press hot water , but nothing happend when we press , anyone knows how to sole this question ?
Allan
SOURCE: hello, the spent coffe holder fill up with water
water fills spent coffee holder during coffee making
SOURCE: Code error 06 in Krups
The error 06 comes after start up and machine in auto test - happens because of more than one problem. However first unplug the machine and then remove the water tank filter (the cylinder inside the water tank) and wash it up. Actually the filter should probably be replaced. However fix it back in the water tank and tide it safely upon the exit ring.
Now restart the machine and let it perform the automatic self testing.
Please get back to us if you have any further query.
Have a nice day.
SOURCE: Krups coffe machine KM4065 does
Sounds to me like one or both of the Thermal Fuses are blow. This was the major malfunction for this coffee maker. Krups offers a three year full warranty on their coffee makers. So if this is still under warranty I would contact Krups and have them send you a new one or repair the one you have. Opening the coffee maker will void any warranty. I'm going to show you the steps on how to replace this and also a picture of what they look like. If you at all are not comfortable working with AC electronics. Find a trusted friend, family member or technician to do it for you.
Regards,
Tony.
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