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MP Chassis/Low power to deck light

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  • MP Chassis/Low power to deck light

    Ok I have a MP Chassis that is giving approx 100 volts to decklight instead of 220v which all other chassis are doing.

    This lack of voltage is causing decklight not to work. Before I start, What can start to look at in the chassis to rectify this problem.

  • #2
    Re: MP Chassis/Low power to deck light

    U have 220v pit lites in the UK? I don't know about there ,but here(USA) 220v is 2 110V lines sharing a common netural,so my guess would be U have lost one leg of your line voltage...
    People tell me I'm indecisive, but I just don't know...

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    • #3
      Re: MP Chassis/Low power to deck light

      Yes 220V over here. The only other weire thing with this chassis is the lights on the masking units are dimmer.

      I suspect it's something to do with the "m" relay socket. I put a new M relay in and it worked the first time the pinspoter was turned on. But once the machine was turned off, then back on there was no light.

      Could a fauly "m" relay socket caue this. I though with the M relay you would get either voltage or no voltage.

      Can anyone confirm this.

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      • #4
        Re: MP Chassis/Low power to deck light

        M socket could be going...did you eyeball the C1 pins for any burnt?
        I've had enough of hope & chains.

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        • #5
          Re: MP Chassis/Low power to deck light

          yeah, socket and pins look fine.

          What's worse about it is, this is our end lane. and it gets used the least. We never have problems with this lane. Looking back through diary the lase fault we had was at the beginning of may !!

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          • #6
            Re: MP Chassis/Low power to deck light

            With sufficiently burnt contacts/pins on the M relay base you might reduce the voltage that much (it's quite a big drop though, but that may depend on what measuring device you used and whether there was much load at the time).

            Pins 6 and 7 allow current to the pit light and to T1 primary.

            T1 powers the pin lamps, so they might dim too.

            It also powers the M2, spot relay and contactors, but those relays will turn on at a much lower than nominal voltage (therefore you probably wouldn't have noticed any difference to them).

            Cheers,
            Andrew.

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            • #7
              Re: MP Chassis/Low power to deck light

              does another chassis cure the problem.if not check the wiring in the trunking.if you only have a problem with the pit light, then it could be the pit light or the wiring in the trunking, if it is a chassis problem, you are looking in the right areas. e.g.C1 or M relay power to or thro.
              good luck and let us know please.
              maister

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