lonemorf Posted July 12, 2016 Share Posted July 12, 2016 Hi all, I have a pair of MAC2000s running in a show at the moment, and one of them seems somewhat lesser in output than the other - I am sure they were fine 3 shows ago, but it really stood out today. There isnt a program bug (I.e, I havent got it inadvertantely dimmed), and the lamps are both under 150hours old. Any ideas of what I could check? Thanks in advance. Link to comment Share on other sites More sharing options...
Richard CSL Posted July 13, 2016 Share Posted July 13, 2016 It sounds like one of the lamps is failing, inspect both lamps , I think you will find the dimmer one has either blackened or frosted out. Link to comment Share on other sites More sharing options...
lonemorf Posted July 13, 2016 Author Share Posted July 13, 2016 Thanks Richard, I will have to pull it out the rig and take a look. Link to comment Share on other sites More sharing options...
lonemorf Posted July 13, 2016 Author Share Posted July 13, 2016 No blackening or frosting - changed the lamp anyway, but still down on output. Its almost like its stuck in reduced power mode (which according to everything im seeing, it isnt). Any Martin genius' on here? Link to comment Share on other sites More sharing options...
johnhuson Posted July 13, 2016 Share Posted July 13, 2016 Have you checked the lamp alignment? Link to comment Share on other sites More sharing options...
tweety Posted July 13, 2016 Share Posted July 13, 2016 Check the 700w circuit, maybe a connector loose or the relais is not working. Link to comment Share on other sites More sharing options...
lonemorf Posted July 13, 2016 Author Share Posted July 13, 2016 Have you checked the lamp alignment?Yeah, did that when I changed the lamp Check the 700w circuit, maybe a connector loose or the relais is not working.Any idea where I am looking for that? I will try to find the service manual in the interim. Link to comment Share on other sites More sharing options...
Richard CSL Posted July 14, 2016 Share Posted July 14, 2016 OK sadly to eliminate the lamp can you swop the two of them over, is the reflector ok, difficult to see but sometimes after a lot of use the silver becomes grey. It is unlikely to be the ballast as either they work or don't. Yes they do have a dim option, (If the dim wires are unplugged the dimmer is disabled, small connector on the side of the ballast) which I think is a small relay control on the main pcb, again swopping the lamps over will eliminate where we need to look for the problem. Good luck. Link to comment Share on other sites More sharing options...
lonemorf Posted July 14, 2016 Author Share Posted July 14, 2016 Thanks Richard, I will try to squeeze that in before the matinee today, else it going to have to wait till Friday :/They are a proper pain to swap lamps in........ Link to comment Share on other sites More sharing options...
Richard CSL Posted July 14, 2016 Share Posted July 14, 2016 Thanks Richard, I will try to squeeze that in before the matinee today, else it going to have to wait till Friday :/They are a proper pain to swap lamps in........ Yes I know, but it is process of elimination, ie: faultfinding. Link to comment Share on other sites More sharing options...
lonemorf Posted July 14, 2016 Author Share Posted July 14, 2016 Ya I know. :/I just find the lamp changing on those units a tad confusing - its meant to be built as a quick changing "field serviceable" operation, but I am finding anything but - the 2 brass spokes at the top make things *really* difficult. Link to comment Share on other sites More sharing options...
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