Issue with Westinghouse 19" LCD Monitor (large pics)

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  • ifly
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    I have a problem with this TV on the other (main) board p/n A190A5-A05-P-S6. By the ribbon cable that goes to the display there is a transistor Q21 that has burned up. Could someone tell what the number on that transistor is, it would by nice if I could replace that transistor.
    Thanks

    Leave a comment:


  • pinkith
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    Thanks billy66, I also replaced caps and mosfets and got the same problem with R210, replacing this resolved the problem. Also thanks to everyone else.

    Leave a comment:


  • mldenison
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    I've got kind of an interesting resolution on the search for the value of the zener diode ZD100 on ny power board. I never did find the schematic. However, there was an eBay seller in China selling the power board, stating that they were for the Westinghouse and some Viewsonic monitors. I emailed him asking which Viewsonic monitors. He said he didn't know. I then told him I had a broken diode and was hoping to locate the schematic via a model number. He actually checked with the factory there making them and told me it was a 20V zener. Pretty nice guy!

    Leave a comment:


  • EGuevarae
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    Originally posted by billy66
    I have this same monitor: Westinghouse L2046NV. Same issue... but once I replaced all the caps and the mosfets, it still didn't work. The backlights would flicker for a second, and then go out... over and over. I finally found R210 (on the backside of the board) was bad. Ohm'd out it read 900K ohms... and it should be 10 ohms. Reads: 10R0. I replaced it and it fixed the issue. Just wanted to throw my two cents in to help others if they have the same issue. This one was killing me for a while.

    Thanks to all those on this, very long, thread that have helped... the info was a great help to me.
    Thanks - good to know.
    Eduardo

    Leave a comment:


  • billy66
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    I have this same monitor: Westinghouse L2046NV. Same issue... but once I replaced all the caps and the mosfets, it still didn't work. The backlights would flicker for a second, and then go out... over and over. I finally found R210 (on the backside of the board) was bad. Ohm'd out it read 900K ohms... and it should be 10 ohms. Reads: 10R0. I replaced it and it fixed the issue. Just wanted to throw my two cents in to help others if they have the same issue. This one was killing me for a while.

    Thanks to all those on this, very long, thread that have helped... the info was a great help to me.

    Leave a comment:


  • PlainBill
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    Originally posted by mldenison
    Thanks for the links, Bill. I think I can get the power board schematic if I can ever come up with another model number. I thought I had it with a Viewsonic monitor, but it turned out to be a Delta DAC-19M010 unfortunately.
    This is a constant problem. Quite often we will find several different power supply / inverter boards and even logic cards used in a given model of monitor.

    PlainBill

    Leave a comment:


  • mldenison
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    Thanks for the links, Bill. I think I can get the power board schematic if I can ever come up with another model number. I thought I had it with a Viewsonic monitor, but it turned out to be a Delta DAC-19M010 unfortunately.

    Leave a comment:


  • PlainBill
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    Originally posted by mldenison
    After some discussions on another board, it appears that the prefix 'zd' stands for zener diode. We're guessing a 12 volt, 1 watt zener should do the trick.

    I had emailed Delta Products about this board in hopes of getting a schematic and/or a parts list. I got back a fairly curt (snotty) reply basically telling me to take it up with Westinghouse. And we all know how they are.
    It should be pointed out that this power supply - indeed, the entire monitor, is sold under a number of different labels.

    Two sites that can be helpful are www.elektrotanya.com, which has a number of service manuals. Their 2 downloads a day limit will be lifted if you register.

    Also, http://www.4shared.com/dir/7126951/4..._INVERTER.html has a number of original and third-party schematics for power supply / inverters.

    PlainBill

    Leave a comment:


  • mldenison
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    Originally posted by alexanna
    If the dac-19m005 is similar to your dac-19m015
    The markings on the 005 board of zd100 read.The diode is closer to CE104 CAP.
    PJ69
    HU
    After some discussions on another board, it appears that the prefix 'zd' stands for zener diode. We're guessing a 12 volt, 1 watt zener should do the trick.

    I had emailed Delta Products about this board in hopes of getting a schematic and/or a parts list. I got back a fairly curt (snotty) reply basically telling me to take it up with Westinghouse. And we all know how they are.

    Leave a comment:


  • ykilde
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    Could someone help me identify this diode? I have a couple of these that are shorted. I've replaced all the capacitors, 40T03GP MOSFET and checked all fuses. I found several SMD resistors that had very high resistance (0.2 ohms -> 1.9 megaohms) along with these shorted diodes.

    I believe these are LL4148 diodes, but I would like someone who is familiar with these to verify. Thanks
    Attached Files

    Leave a comment:


  • alexanna
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    If the dac-19m005 is similar to your dac-19m015
    The markings on the 005 board of zd100 read.The diode is closer to CE104 CAP.
    PJ69
    HU

    Leave a comment:


  • mldenison
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    Another question about my DAC-19M015 power board.

    On the solder side, to the right of the CE103 cap (1000uf, 25 vdc) (with the cap positioned to the top), there's a small black square labeled ZD100. It appears to be cracked.

    Can anyone tell me what kind of component it might be, and the value?

    Thanks

    Leave a comment:


  • EGuevarae
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    Originally posted by jetadm123
    Hello! I believe the original mosfet was a 40T03GP. These are readily available on Ebay.

    Leave a comment:


  • mldenison
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    I appreciate it! 6 on the way.

    Leave a comment:


  • jetadm123
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    Hello! I believe the original mosfet was a 40T03GP. These are readily available on Ebay.

    Leave a comment:


  • mldenison
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    I may have missed it, but is there another MOSFET than can be used? Both Mouser and DigiKey show the 863-NTP45N06LG part as no longer available.

    Thanks

    Leave a comment:


  • eiznekcm
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    Good Point. Thank you. I will probably look for another board.
    Craig

    Leave a comment:


  • PlainBill
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    Originally posted by eiznekcm
    That's what I thought, but I wanted to make sure. :-)
    Since L105 is gone is there any way to find the correct inductor to replace it? Any ideas are welcome.
    Thanks again,
    Craig
    I had thought of searching for the service manual for the monitor and other monitors that use the same power supply. The I realized that a considerable amount of current passed through that inductor to destroy it AND damage the circuit trace next to it. There is certain to be additional damage.

    PlainBill

    Leave a comment:


  • eiznekcm
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    That's what I thought, but I wanted to make sure. :-)
    Since L105 is gone is there any way to find the correct inductor to replace it? Any ideas are welcome.
    Thanks again,
    Craig

    Leave a comment:


  • EGuevarae
    replied
    Re: Issue with Westinghouse 19" LCD Monitor (large pics)

    Originally posted by retiredcaps
    L105 => L => inductor.
    Agree. L is for an inductor. You can see one in one of your pics ...

    Leave a comment:

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