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cycling fan on Domino 30h

Discussion in 'Projectors, Screens & Video Processors' started by m0v1em4n, Sep 6, 2005.

  1. m0v1em4n

    m0v1em4n
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    Hi

    I have a question for perhaps Alan Roser, or any in the know

    I have a Domino 30 H which is aprox 1 month old with 70 hours on the clock, and now when i first start it up the fan seem to cycle between high and low the domino is ceiling mounted on a proper sim bracket and the room temperature could be classed as normal, when the 30H as been on a while the cycle is not as evident, any ideas

    Steve

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    Reposted with proper title
     
  2. Timmy C

    Timmy C
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    I didn't even realise the fan had two speeds! Can't say I've ever noticed it on mine and it's mounted the same as yours. I'll pay more attention when I switch it on tonight.
     
  3. m0v1em4n

    m0v1em4n
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    Hi Timmy

    I think there is some form of electronic in there that regulate the fan speed according to the temperature, I would say that when the domino is first switched on that the fan would be low getting faster has the heat build up :confused:


    Steve
     
  4. RTFM

    RTFM
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    All single chip Sim2 projectors have single speed fans.

    Jeff
     
  5. m0v1em4n

    m0v1em4n
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    Hi Jeff,

    Cant understand Why it sound as if the fan speed increases then decreases :confused:

    Was under the impression that the fan was like a PC fan and there was some circuitry that alters it speed to suit the heat.
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  6. gandley

    gandley
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    could be fan vibration. Sligtley tighten the fan screws if you can but dont go mad.
     
  7. m0v1em4n

    m0v1em4n
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    Hi gandley

    I have now taken it of the sim bracket and placed it on a shelf temporally and it seem ok now, :confused:

    steve
     
  8. gandley

    gandley
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    that does sound like fan vibration then. I had the same thing. sometimes it would make the noise, mostly on start up and other times it was fine.

    Moved it to the ceiling and never heard the noise until about 2 weeks later then it did it again. Tightened the fan screws and it was fine after that.....as far as i know
     
  9. gandley

    gandley
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    fan use to make the noise for about a minute after power on, does that sound the same?
     
  10. m0v1em4n

    m0v1em4n
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    Hi Dustin,

    Its not vibration, sound like the fan goes into an high speed mode for just a second or two then back to normal and it does this mainly just after start-up for perhaps 10 mins or so then it settles down after that presume when it get hot, turning it the rite way up as helped although it was there tonight at start-up but went after a while,when I had it on the sim bracket the other night it seem to be there all the time Its just very distracting :mad:
    Jeff said that the fans are single speed, but I thought that there might be some form of temperature regulator as there is in some PC power pack fans, but this seem not to be the case.
    The Domino 20 I had before was ok, was hoping that Alan Roser might pop in the forums and give me his opinion.


    Steve
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  11. RTFM

    RTFM
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    Alan is away at Cedia then off to Ireland this week so you probably won't hear from him.
    There is definitely no variable speed control for the fan. Sounds like the fan itself could be at fault.
    You can phone Eddie (head of service at Sim2 UK Ltd ) on 01825 750850 if you want another opinion.

    Jeff
     
  12. m0v1em4n

    m0v1em4n
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    Thanks jeff

    will do that

    steve
     
  13. m0v1em4n

    m0v1em4n
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    Here is a sound file of the offending noise

    fan noise
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  14. gandley

    gandley
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    Nice sound file.

    My PC used to make that noise and it turned out to be knacked fan bearings.
    not fan vibration.

    When it makes the nosie gentley tap near the fan and see if this make the noise go away.

    Regardless though you need the faulty fan replaced.
     
  15. RTFM

    RTFM
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    sounds like you need a new fan.

    Jeff
     
  16. m0v1em4n

    m0v1em4n
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    Thank all of you,

    This 30H is only a month old :eek: will ring SevenOak to see about repair

    Steve
     

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