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why I don't do this any more

Discussion in 'Electronic Repair' started by Roy J. Tellason, Oct 23, 2003.

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  1. Ok, so reading a bunch of FAQs to refresh my memory and reading some of the
    posts in here where I understood most of what was going on actually got me
    to the point where I felt like I might want to tackle one or more of those
    monitors I have sitting here. So last night I opened one up...

    This one's the NEC Multisync 3D, with vertical problems.

    Okay, only 3 screws to get the back off! Cool, that could've been lots
    worse...

    Uh-oh. All I see is sheet metal all over the place. (Looking around) It
    appears that the stuff on one side is a LV switcher or something? And the
    other side appears to be for processing the input cable signals, I guess I
    need the board at the bottom...

    Back when I last did this for a living, I had two "shop lights" hanging
    over my bench, and I had an actual bench to work on, lots more room than
    the 2 foot square of empty space I have on my desk at present. Lots more
    light than the 60W bulb on the end of an arm that won't seem to stay aimed
    where I want it...

    24 screws later, and heaven only knows how many connectors unplugged, I've
    got bits hanging off both the front and back of my desk. Got the bottom
    board out, got the vertical chip ID'd (It's an LA7835 in case anybody was
    wondering), crossed it in the ECG book, and got the pinouts, not that
    they make a whole lot of sense to me in some isntances. And somebody said
    that this was probably a cap, anyway. It took me a while to get that
    number, there seem to be bits strategically placed in my way so that it's
    harder to read than it could be. And that stupid light keeps on moving,
    pointing *away* frmo the monitor and leaving things in shadow.

    I'm wondering where the heck my soldering iron *is* (either of the two of
    them I have), and where I'm going to put it in this mess while it warms
    up, and what I'm going to use to power my cap checker, since for sure I
    don't have 4 C batteries on hand, and as seldom as I use the darn thing
    I'm not going to be putting a set in there.

    I don't think I have one of these chips on hand in my junkbox, or my
    (former shop) inventory, so I'd have to go out and buy one, and leave
    this thing in the condition it's in while I did, and then install the
    sucker. And see if that worked, which means putting this thing all the
    way back together, or at least mostly. And then going through all of that
    over again if the chip didn't do it, and shotgunning caps in the vertical
    area, once I got to the point where I could figure out which ones *were*
    in the vertical area, since it's hard for me to see those traces,
    compared to how easy it used to be.

    Not only did I have that pair of shop lights but I also had a lighted
    magnifier, about the time I closed up the shop. And it's not handy now,
    no place to clamp it to.

    This is starting to look *real* tedious, with all of the reassembly and
    re-disassembly it's starting to look like it's gonna take. And then I
    can't *see* the stuff I used to be able to -- nothing much important, just
    things like chip numbers, traces on the board, and so forth, that you
    need to be able to see in order to do this at all.

    Why was it I stopped doing this again? Oh yeah... NOW I'm starting to
    remember. I guess I just needed a little refresher there, or something.

    Not to mention time. The FAQs keep saying that your time is free, as
    compared to having to pay somebody for it. I know that doing this for a
    living I'd hit stuff like this and could *never* recover the cost of the
    actual time it took to get in there and do stuff, and that was assuming
    that I got it fixed the first time around, that it was something fairly
    simple and straightforward. Which doesn't appear to be the case for much
    in the way of monitors any more. Is *any* of this stuff made to be more
    repairable?

    Guess I'll just put this back together now, and look for an alternative way
    of dealing with it. At least I'm only dealing with two kinds of screws,
    not a whole mess of different kinds. I *HATE* engineers that do that kind
    of crap! Maybe if I'm lucky I'll find somebody who's willing to give me
    one good monitor and fix the other two for themselves, like I did once
    before (the one I ended up with that time would only do 640x480, though
    it's still on the w98 box here). We'll see. Or maybe I'll just pitch 'em,
    as I've scrapped out enough stuff over the years that I finally reached the
    point where I figure I have *more than enough* parts for any hobby stuff
    I'm ever gonna do...

    And as for the rest of you guys that are going to continue to work on this
    stuff for a living: Good luck! I wish you well...
     
  2. RICHARD1

    RICHARD1 Guest

    2 ooo's for one working seems like it could be a good deal your no
    where near me I bet.
     
  3. Probably not. I tried to ask you whereabouts (roughly) you were in an
    email, and it just bounced...
     
  4. Bob Parker

    Bob Parker Guest

    Hi again Roy,
    I know exactly what you're talking about! It was an NEC 3D monitor
    which helped me to make up my mind to get out of the repair business.
    This one "only" had a problem with varying CRT G2 voltage because of a
    defective FBT. Even that obvious component was so hard to get at and
    replace that I swore I'd never touch another 3D.
    Somewhere here I've got photos I took, of this monster in dozens of
    pieces in exactly the state you described. If anyone here actually
    likes working on these things, you're welcome to it. :) I think I'd
    prefer to wrestle alligators.

    Cheers,
    Bob
     
  5. RICHARD1

    RICHARD1 Guest

    Yeh bounces im in orange coutny new york
     
  6. Aaaah, that reminds me of about 6 years ago when, as an ATM technician, on a
    cold and windy day I had to remove the thick steel front of an old Diebold
    Automatic Teller to get at the display. The fascia was secured to the
    chassis by a dozen screws or more, weighed a ton, and the surrounding
    chassis had been urinated on and spewed on many times over the years. Having
    removed the fascia with the aid of a long wooden beam I got at the display
    by first clearing out all the green coins and crap around the area. What
    fun!

    Henry
     
  7. NEC is a fine monitor. But, when something goes wrong, they definitely are a
    pain in the ass to fix purely because of the amount of shielding that they use!

    I stick with Sony, personally. Still a little complicated in terms of
    assembly, but manageable and nowhere near as complicated.

    I was just given a Sony 17 montor (CPD-200GS) for free and all it had was a
    cold solder joint that was causing the trouble with high voltage startup.
    Disassembly and assembly wasn't too bad, once I figured out how it all came
    together. - Reinhart
     
  8. Well, that's within driving distance...

    Fix the one I keep while I wait? :)
     
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