Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newbie!)

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  • Rhothgar
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    Originally posted by budm
    "It refers to the milk frother that comes with the coffee machine!!!!!" Sorry but I did not understand what the 'milk frother' is in relation to D1.
    It's another problem I have with the milk frother which is a separate piece of kit on the machine. It has a kettle type connector and I had accidentally commented about D1 on that PCB and then later realised that I have not done a post about that PCB.

    So I didn't want to confuse but ended up doing so because you didn't have the full picture.

    I'll check D1 on this board which someone rightly said is a GS1M and report back.

    Just really busy at the moment so may take some time to update.

    Thanks for everyone's help on this so far.

    Leave a comment:


  • budm
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    "It refers to the milk frother that comes with the coffee machine!!!!!" Sorry but I did not understand what the 'milk frother' is in relation to D1.
    Last edited by budm; 06-07-2015, 12:09 PM.

    Leave a comment:


  • Rhothgar
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    Originally posted by budm
    So is it working or it still has shorted rectifier D1?
    Please refer back to my Post 23!

    Leave a comment:


  • budm
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    Originally posted by Rhothgar
    budm

    You know where you have questioned TRUE? between 47 Resistor and other resistor which is the grey metal oxide one (I assume), do you want me to check continuity here?

    Is that what you are asking? I am very new to all this so need to understand what is being asked of me.

    Also, what are you using to markup because I need to mark up your edited PCB photo. I am on a mac and I am not that familiar with the highlighter in preview - it is very slow and tedious to use!

    I can switch to a PC if necessary if there is a good markup programme?
    That is correct, just to verify that those connection are made based on what I can see from the pictures.
    So is it working or it still has shorted rectifier D1?
    The big gray resistor looks like it got hot and I cannot tell what the color bands are.
    I use the pictures from post #1 and scale them so the top and bottom are the same size to make the virtual PCBA.
    Double sided boards are hard to trace the connections using the pictures that is why I put 'TRUE?' there.
    I use PAINT.net on my PC.
    Last edited by budm; 06-04-2015, 08:53 AM.

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  • Rhothgar
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    Originally posted by budm
    This is what I can tell based on the pictures.
    budm

    You know where you have questioned TRUE? between 47 Resistor and other resistor which is the grey metal oxide one (I assume), do you want me to check continuity here?

    Is that what you are asking? I am very new to all this so need to understand what is being asked of me.

    Also, what are you using to markup because I need to mark up your edited PCB photo. I am on a mac and I am not that familiar with the highlighter in preview - it is very slow and tedious to use!

    I can switch to a PC if necessary if there is a good markup programme?

    Leave a comment:


  • vinceroger69
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    Originally posted by Rhothgar
    Yes C5 and C8 are both 400V 2.2uF Manufacturer KT with a dot in between the letters. Other markings: RL13C PET

    Metal Oxide resistor? Is that the one with the grey base or blue base?
    grey base one.

    Leave a comment:


  • Rhothgar
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    Originally posted by budm
    The Blue rectangular X/Y cap, do each one of the legs connected to Line and Neutral? That cap looks to be connected in parallel with the MOV.
    That big Metal Oxide resistor (Red, ?,?,? bands) looks to be for dropping resistor and looks like it got hot, D1 is the rectifier for generating DC for the running the circuit.
    Is the Lytics brown cap (c?) next to C5 rated at 2.2uF 400VDC also?
    Yes C5 and C8 are both 400V 2.2uF Manufacturer KT with a dot in between the letters. Other markings: RL13C PET

    Metal Oxide resistor? Is that the one with the grey base or blue base?
    Last edited by Rhothgar; 06-04-2015, 02:09 AM.

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  • vinceroger69
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    Yes i think budm needs you to double check if the points hes marked true? is where hes the circuit actually runs etc just to make sure his drawings are correct and match the board layout.

    Leave a comment:


  • Rhothgar
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    Originally posted by Rhothgar
    I have found a diode which is showing .375 in circuit both ways.

    All the others are showing 0.62 or thereabouts in circuit and OL in other direction.

    The diode D1 is copper coloured looking. Is this a Zener diode? It is tiny! How can I find out what specification it is please?
    Sorry Guys. Just realised please totally ignore this comment about D1. It refers to the milk frother that comes with the coffee machine!!!!!

    Leave a comment:


  • Rhothgar
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    Originally posted by budm
    This is what I can tell based on the pictures.
    I feel like a spare part here! No pun intended.

    Where you are marking true? on the virtual PCB (very impressive by the way), are you asking for me to check something?

    It will probably be the weekend before I can strip it out again.

    Did you use the photos that I had uploaded to Dropbox in the end?

    Leave a comment:


  • budm
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    Please see if it looks correct now, thanks.

    Leave a comment:


  • vinceroger69
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    im new to trying to read these sort of things so good practice for me too,a easy mistake to make when going through all the pictures.Its good to see how you can draw these circuits out, i can see Now why now you ask for good clear picures.

    Leave a comment:


  • budm
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    I drew the line wrong so I need to fix that, thanks for seeing that, I have been flipping the virtual PCBA back and forth many times now.
    It is fixed now.
    Last edited by budm; 06-03-2015, 03:52 PM.

    Leave a comment:


  • vinceroger69
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    budm have you got c5 and l1 mixed up? im new to all this was just looking and trying to learn the circuits im using the picture in post 1 im probaby completly wrong though.

    Leave a comment:


  • budm
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    This is what I can tell based on the pictures.
    Attached Files
    Last edited by budm; 06-03-2015, 03:55 PM. Reason: Fixed the connections

    Leave a comment:


  • budm
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    The Blue rectangular X/Y cap, do each one of the legs connected to Line and Neutral? That cap looks to be connected in parallel with the MOV.
    That big Metal Oxide resistor (Red, ?,?,? bands) looks to be for dropping resistor and looks like it got hot, D1 is the rectifier for generating DC for the running the circuit.
    Is the Lytics brown cap (c?) next to C5 rated at 2.2uF 400VDC also?
    Last edited by budm; 06-03-2015, 10:04 AM.

    Leave a comment:


  • Longbow
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    Originally posted by SteveNielsen
    Just to make sure it's understood, checking components in circuit is fine for quick trouble-shooting but readings are often altered by other connected components in circuit. To be sure the parts should be tested out of circuit.
    Oh, please. If we all had to remove the parts from every pc board we would never get anything fixed, let alone designed. It is actually faster to replace all the parts at once with no testing whatsoever. Pretty obvious what happened in this case, judging by the appearance of one capacitor and one resistor.

    Leave a comment:


  • stj
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    lift one end and test it again.

    Leave a comment:


  • diif
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    D1 looks to be a GS1M, which is a 1A rectifier diode.

    Leave a comment:


  • Rhothgar
    replied
    Re: Coffee Machine - YAY! I've blown my first capacitor (and a tip or two from a Newb

    Originally posted by stj
    looking at the board,
    i would start by checking all the diodes for shorts.
    I have found a diode which is showing .375 in circuit both ways.

    All the others are showing 0.62 or thereabouts in circuit and OL in other direction.

    The diode D1 is copper coloured looking. Is this a Zener diode? It is tiny! How can I find out what specification it is please?

    Leave a comment:

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