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Sunbeam EM6910 Repair pointers...

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  • Davidque
    replied
    Has anyone used one of these JYPC-4 3-Way Steam pumps?

    They seem to cost half as much as the sunbeam OEM pumps (China Star).

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  • Davidque
    replied
    Just to update this I ended up regaining the pre programmed shot volume button function after some time of use.
    I believe it was my weekly caffetto backflush routine that might have cleaned some scale and got it working as it should.

    Leave a comment:


  • LeroyC
    replied
    Originally posted by Davidque View Post

    Are you sure it's a timer and not a flow meter? Are you saying there's some kind of controller behind the buttons that works for both single and double shot?

    I'll see if I can spot it on the parts manual before I take the lid off.
    Xanthine has cleared this up for both of us - the little control board behind the buttons does not control the timer function. That’s good to know, although it does mean you may need to look at replacing the main PCB.

    Leave a comment:


  • Xanthine
    commented on 's reply
    Sorry to take so long to get back to comment on this but I wanted to check my facts first by looking at one of the spare button panels I had in the shed. As I thought, there are no active components on this panel - only 5 LEDs, 5 pb switches, a buzzer and a couple of multi-pin connectors. All of the control and timing is done by micro-controller on the main control board so the problem could well be the flowmeter. I once came across a 6910 which had a blocked flowmeter after being left un-used for several months with water in the lines. Slime grew in the plastic tubing and blocked it! The top of the flowmeter can be undone by twisting it without removing it then the impeller can be checked. From memory, a magnet attached to the impeller triggers a hall sensor to generate pulses for the control board.

  • LeroyC
    replied
    Originally posted by Davidque View Post
    Are you sure it's a timer and not a flow meter? Are you saying there's some kind of controller behind the buttons that works for both single and double shot? I'll see if I can spot it on the parts manual before I take the lid off.
    Yes, it's a timer. They're not volumetric settings. There is definitely a small control board behind the buttons that's quite easy to get to once the lid is off.

    Leave a comment:


  • Davidque
    replied
    Originally posted by LeroyC View Post
    I'm pretty sure that the control unit for the timer is actually behind the buttons so you don't need to replace the whole PCB. I would just replace that particular part as it's not difficult to do.
    Are you sure it's a timer and not a flow meter? Are you saying there's some kind of controller behind the buttons that works for both single and double shot?

    I'll see if I can spot it on the parts manual before I take the lid off.

    Leave a comment:


  • LeroyC
    replied
    I'm pretty sure that the control unit for the timer is actually behind the buttons so you don't need to replace the whole PCB. I would just replace that particular part as it's not difficult to do.

    Leave a comment:


  • Davidque
    replied
    I just finished replacing a collar as part of a refurb on an old run down machine I inherited. Everything works well except the single and double cup programs don't automatically stop pouring.

    I tried a factory reset which beeped 4 times as if it worked, but still the buttons seem to stay on once pressed.

    Is it likely that the flow metre is not working?

    Is this a common issue and is there anything to check, or just replace the part?

    Any help would be greatly appreciated! Click image for larger version

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  • Petercollins
    replied
    Originally posted by Robbks View Post
    likely to be the thermo-fuse.

    I blew a few on the steam TB
    Test it by bypassing the fuse with a piece of insulated wire.

    otherwise it may be a relay issue (i had those too) but the relay usually sticks on,
    so the TB is always heating whenever the power-point is on

    Finally it might be a thermostat issue or even a dead heating element.

    But fuse is most likely.
    I'm trying to resurrect a EM6910, the fuse had blown, as I see it that the fuse is the last resort fail safe and blew for the reason the block had got to 185°C, probably due to the thermostat not opening. I intend to replace the thermostat with a generic one , problem is I can't find what temperature to buy, Gaggia seem to be 145°C, would the sunbeam be the about the same? Any help would be appreciated , thanks.

    Leave a comment:


  • mbouy
    replied
    Originally posted by Beaker74 View Post
    Quick update on my machine, blown thermo-fuse. $4 from Jaycar and machine is up and running again.
    I love this forum, one little update like this and I was able to resolve my problem too! Other posts here include links to manuals and simplified instructions to break down the machine to get inside.

    I do still have a niggle, in that my power light continually flashes red even while the other lights are steady, doesn't seem to slow it down...

    Part: https://www.jaycar.com.au/228oc-thermal-fuse/p/ST3814
    Teardown: http://coffeesnobs.com.au/documentat...ent-guide.html
    Manual: http://coffeesnobs.com.au/documentat...ce-manual.html

    Leave a comment:


  • Xanthine
    replied
    All good!

    Fingers crossed for success.
    If you look closely you can probably see signs of wear on that valve.

    The group head in the photos is from my box of spare parts - easier to photograph.
    I'm afraid I'm a 'search & destroy' typist and have never got any better at it so photos are much quicker.

    Look forward to hearing how you get on.

    Trev

    Leave a comment:


  • smallbigblob
    replied
    Originally posted by Xanthine View Post
    Possibly the anti-drip valve.

    To check it first remove the shower screens -

    [ATTACH=CONFIG]18141[/ATTACH]

    Then remove the brass nut using a 12mm spanner or socket -

    [ATTACH=CONFIG]18142[/ATTACH]

    The valve should come out with it's spring -

    [ATTACH=CONFIG]18143[/ATTACH]

    Check spring and tip of rubber valve for damage. I think I have seen new ones on Ebay or CS site sponsors-

    [ATTACH=CONFIG]18144[/ATTACH]

    Also clean up the valve seat -

    [ATTACH=CONFIG]18145[/ATTACH]

    Re-assemble in reverse order making sure the shower screens are seated properly in the rubber seal (not shown in the photos).

    Cheers
    Trev

    Thanks so much for the tip! coffee machine is packed up in a box at the moment coz we're shifting houses but will be sure to have a look at that. Will post the outcome once i've done the checks! Also good to see that its not just my group head that looks all crusty like that! i have given it a good scrub with a fine wool brush and it took away some of the calc/rust.

    Leave a comment:


  • Xanthine
    replied
    Originally posted by smallbigblob View Post
    Hello everyone! Just wondering if any of you had a problem where when the hot water wand on a EM6910 is turned on, water leaks from the grouphead as well? Usually make cups of tea for the wife and coffee for myself so trying to avoid having got to put the kettle on as well as heat up the coffee machine.
    Possibly the anti-drip valve.

    To check it first remove the shower screens -

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    Then remove the brass nut using a 12mm spanner or socket -

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    The valve should come out with it's spring -

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    Check spring and tip of rubber valve for damage. I think I have seen new ones on Ebay or CS site sponsors-

    Click image for larger version

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    Also clean up the valve seat -

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    Re-assemble in reverse order making sure the shower screens are seated properly in the rubber seal (not shown in the photos).

    Cheers
    Trev

    Leave a comment:


  • miicah
    replied
    I have an old em6910 with the following issues:

    - Steam wand pumps but never gets hot (just little pumps of cold water)
    - Group head sometimes leaks

    Is it worth repairing or should I look at buying something newer/better?

    Leave a comment:


  • smallbigblob
    replied
    Hello everyone! Just wondering if any of you had a problem where when the hot water wand on a EM6910 is turned on, water leaks from the grouphead as well? Usually make cups of tea for the wife and coffee for myself so trying to avoid having got to put the kettle on as well as heat up the coffee machine.

    Leave a comment:

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