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Projector lamp error

Discussion in 'Hobby Electronics' started by TonyS, Feb 16, 2009.

  1. TonyS

    TonyS Guest

    Hi, I have a Sony video projector VPL-HS1 that is behaving badly.
    After powering up it works for about 30 seconds.
    Then the lamp is switched off, the yellow Lamp/Cover goes on and the green power
    LED blinks; first fast, then slower and finally the thing switches to standby.

    I did clean the air filter.

    The fans come on first and then even slow down a bit.

    There are tiny cracks in the outer lamp glass near the small end. Yet the small
    bulb inside is intact and it works with normal brightness.

    I know next to nothing about video projectors.
    It doesn't make sense to me to indicate lamp error when it actually works. Are
    there parameters monitored that I am not aware off? Or could just the monitoring
    circuitry be broken?

    Cheers

    Tony
     
  2. Phil Allison

    Phil Allison Guest

    "TonyS"

    ** Ring up Sony, ask for service department -

    and FUCKING ASK THEM !!!




    ...... Phil
     
  3. **No. Replace the lamp. Modern projectors are designed with various sensors,
    which measure lamp life. The lamp may still work (a bit), but not to
    sufficient capacity to provide optimum picture.

    Replace the lamp. It's buggered.

    It's also going to be expensive.
     
  4. It's often better value for money to replace the projector.

    The lamps have a weird negative resistance characteristic
    and a complex startup sequence - this one has failed to
    meet some minimum criterion during startup. It's busted,
    even though it might seem to be trying, as Trevor says.

    Clifford Heath.
     
  5. TonyS

    TonyS Guest

    Thanks. I guess I will rather retire the projector then.
    I hate it when the firmware forces you to go and buy new stuff.
    (unless there would be a safety issue)

    I had a Canon printer once tat did the same thing. Ink was a little low and it
    refused to run, not even just black and white.

    Tony
     
  6. Bob Parker

    Bob Parker Guest


    They always get you with the consumables. Last time I checked, it
    was cheaper to buy a new HP 1020 laser printer than to buy a new toner
    cartridge for it.


    Bob
     
  7. It's easy to criticize like that, but these globes are essentially
    made to contain an electric arc - plasma - in a small tube. I find
    it wonderful that it can be done at all, quite frankly. They have
    a limited life, and I'm sure if they could be made more cheaply or
    to last longer, it'd happen - the manufacturer would corner the
    market.

    Clifford Heath.
     
  8. Andy Wood

    Andy Wood Guest

    I just got a Brother HL-2140. Good value at $88 (actually $68 after
    $20 cashback). I might replace the toner when I have to - it looks
    like you can get them for $55 - $60 if you shop around.

    I doubt I will replace the drum though (life supposed to be 12K - to
    15K pages AFAIK). The cheapest I have seen those is around $160. I saw
    them at Officeworks, where I got the printer, for $220. Is that crazy
    or what?



    Andy Wood
     
  9. Bob Parker

    Bob Parker Guest



    Who's criticising? I was just pointing out the absurdity of the
    price of a spare part compared to the price of the complete unit.

    Bob Parker
     
  10. news1

    news1 Guest

    Bob Parker a ecrit
    it's bubble hi ?
     
  11. TonyS

    TonyS Guest

    There are products where the consumables are subsidizing the actual main
    product. I used to work with dialysis machines and it certainly was the
    case there. It looks like it is the case with ink and printers. I have
    no idea what's the case with projector lamps.

    I am not even saying it's wrong to do business this way. In the end the
    market is supplied with goods that work.

    What I don't like is when, under the pretense of maintaining quality,
    any further use is blocked as soon as a consumable gets near the end of
    it's life, which actually forces you to replace it just a bit earlier
    and doesn't leave any room for your own decision (as I mentioned before,
    I don't know if worn lamps could be a threat to any circuits driving it
    or even a fire danger).

    I was actually wondering if there are any override codes, maybe used for
    testing in the factory or in service.


    Tony
     
  12. **Projector lamps are slightly different, in that there is potential for
    significant damage (to the rest of the equipment) if the lamp is used beyond
    it's practical life. What usually occurs is that the projector operates
    briefly, so the user can see that there is a problem and what that problem
    is. The projector then shuts itself down.

    The cost issue is a separate one. Manufacturers all have their own,
    specific, presumably registered, designs. They probably do so, in order to
    sell lamps at the highest possible price and to prevent copies being
    released to the (legal) market. It seems they use the same marketing model
    that car manufacturers have been using for many years.
     
  13. Mr.T

    Mr.T Guest

    Just like many other printers, they all do it. But they do suck you in by
    providing less toner with the new printers, so it's not as clear cut as it
    seems.
    However always having a new printer and warranty usually makes up for it,
    until you realise just how much it is costing per print in either case.

    MrT.
     
  14. Mr.T

    Mr.T Guest

    Crazy that they even bother to stock them.

    MrT.
     
  15. **I'm staring at my ancient HP LaserJet 5MP. It's around 12 years old and
    the damned thing simply refuses to break down. It still prints with exactly
    the same quality that it did the day I purchased it. I've been tempted to
    buy a new (laser) printer, but I can't bring myself to chuck a product out
    that performs it's function perfectly (albeit slowly, compared to modern
    printers - it's a mighty 6 pages per minute!). I've had one fault with the
    unit. Inside the warranty period and after I'd printed around 4,000 pages,
    it developed a fault, which caused it to print a smudged line down one side
    of the page. I deduced that it was a faulty drum. HP replaced the entire
    cartridge with a brand new one, despite the fact that the toner cartridge
    was likely running on 'fumes'. I've purchased and thrown out at least 4 ink
    jet printers (for printing photos and on disks) in the time I've owned the
    5MP. I hate ink jets, but they sure print nice photos. Hopeless for text
    (the ink still runs and bleeds) though.
     
  16. This behaviour and these printers aren't targeted at the corporate
    world. Proper business devices have much more sensible pricing
    models, and any corporate IT person who bought the scams should
    get sacked.
     
  17. Franc Zabkar

    Franc Zabkar Guest

  18. Mr.T

    Mr.T Guest

    True, although in some cases it's just as easy to buy a new printer on petty
    cash as to buy new cartridges when the cost is low enough.
    So I'd find it a lot quicker to buy a new printer under $100, than wait for
    an order for a $200 toner cartridge.
    Then there is the old trick of getting a receipt stating "toner cartridge"
    when buying a new printer anyway. Not many shops will go along with that now
    though, since most have computerised stock accounting (and Officeworks
    surely do)

    But in the end I guess the simple reason is that Officeworks sell enough to
    cover any extra stocking issues, by making ~80% or 90% profit on each one
    :)

    MrT.
     
  19. TonyS

    TonyS Guest

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