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Hello, we have changed the internal battery at the beginning of May and the voltage is now 4.3 volt without variations. Since, - the desk has run ceaselessly during 3 and a half days without any error - we have made a small light show of 4 hours - we have made two lights trainings I think that the repair is good and the is quite reliable now. I think also think that we can change all chemical condensers (~15) and the three voltage regulators to have a longer life. Any advice about that last point will be appreciated Regards Jean-Etienne

Thanks for your reply. I know that it is an old desk (verification date on electronic circuit is 11/95), but we use it about three times a year with some very old dimmers, and, of course, it went wrong just before ths show. I think it would be very helpfull If someone can send me the circuit diagrams and measurement points Regards Jean-Etienne

Hello, I have a similar trouble with my old XLS. As seen on other topics, I measured the voltage from the internal battery and I got - 4.18V without power supply, the same with the electric cord connected - from 7.30 to 7.55V when switched on, with variation until 6.10V The desk can work about 10 mins and freeze with, at least, two visual effects - only the green leds are on and the voltage is 3.92V - ALL leds are on, and the voltage varies from 6.40 to 6.50V. Any help or suggestion will be appreciated. Regards Jean-Etienne