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  1. #1
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    Identify zener diode ZD801 in video monitor by V7, model D1912-N6

    Ya. Mine is burnt out. I need to identify it so I can replace it.

    If you have a schematic for this monitor, could you glance at it to tell me the industry standard or manafacturer's part number for this diode? I mean, some ID that will help me obtain a replacement?

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  2. #2
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    Re: Identify zener diode ZD801 in video monitor by V7, model D1912-N6

    It is usually tough to help this way. Why don't you upload a high quality picture of the offending region of the circuit board?

    Perhaps you will understand, at the level of block diagram, almost all monitors are really same. This is something like people: at the level of DNA we are quite similar but we all are quite distinct in our own ways. There are many experts here who can broadly identify distinct blocks in the circuit - even without a circuit diagram.

    Once you have identified the block, it has a distinct function and to the experts here the underlying circuit becomes a readable book. Even if the part has been charred beyond recognition, they can usually suggest some meaningful replacement.

    It always helps if you provide all the information that you have in the first post; you receive help faster.


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  3. #3
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    Re: Identify zener diode ZD801 in video monitor by V7, model D1912-N6

    Great suggestion.Click image for larger version. 

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  4. #4
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    Re: Identify zener diode ZD801 in video monitor by V7, model D1912-N6

    I don't know what the diode is but the two 1500uF 10V capacitors look like they are faulty and are probably the reason why the diode got burnt. Also there is another capacitor to the right that looks like it could do with changing as well. Are you sure the diode is faulty? what does it measure in diode mode on the meter.


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    Re: Identify zener diode ZD801 in video monitor by V7, model D1912-N6

    The three capacitors with buldging tops need immediate replacement. The zener has certainly overheated but possibly alive. You will need to remove it and test it out. You need to be very careful because the copper on the solder side has got loose due to the excess heat and can peel off very easily.

    Suggestion: replace the three caps first and test again.


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    Re: Identify zener diode ZD801 in video monitor by V7, model D1912-N6

    Is ZD801 is shorted or open circuit? It must not necessarily be defective.


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  7. #7
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    Re: Identify zener diode ZD801 in video monitor by V7, model D1912-N6

    Yes. At a minimum my plan has always been to replace those capacitors. I'm on the lookout for scrap electronics that might have replacements in them. (No more RadioShack - where can someone buy a few measly capacitors without having to pay 4 times the price in terms of shipping? Agh!)

    So you folks advise me that the diode might still work. Cool. So I'll work on the capacitors first and see if the whole unit works after that. If not, then I'll remove and test the diode.



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