Pinspot Posted December 20, 2008 Posted December 20, 2008 Hi everyone, this is my first post, My problem is I have a pair of CP Mini Scan HPE's and they both have the same problem. After plugging them in I flick the switch on they start up and start to home but after about a minute the fuse blows. I took the fuse holder out which holds two fuses and the fuse holder was boiling hot. Only one of the two fuses was blown. I put a new fuse in and the same thing happens again. Im not sure what's going on becasue the lights seem to work fine for the first minute when there homing but I haven't hooked a controller up to them yet to test fully. All the motors rotate and the lamp comes on during homing as it should. Recap: One of the two fuses blows right away in both fixtures...fuse says BUSS MDL 7A 250V These are Mini Scan HPE's 120V 60Hz No DMX cable is curently hooked up when the fuse blows..couldn't get that far in testing If any one has any ideas it would be greatly appreciated, Peter
Light Console Posted December 20, 2008 Posted December 20, 2008 I'm full of cold here, and ready to be shot down in flames, but could the rating of the fuse and your voltage be the problem? If I recall correctly through the fug in my head, much more current is recquired when the voltage is lower.
bruce Posted December 20, 2008 Posted December 20, 2008 A 7 amp fuse is a 7 amp fuse. Assuming that's the right rating for the device, voltage doesn't (in this case) matter. If the fixture is 120V, the fuse will be OK for up to an 840W load. The manual suggests that the 240V version of the device draws around 900W - the 120V version will have the same load (lower voltage, therefore higher current) The manual says that the correct fuse rating should be printed on the label.
Jamtastic3 Posted December 21, 2008 Posted December 21, 2008 If the Miniscans are 120V, does that mean you're turning them on with a 240V power supply!? Minsiscan's usually take 250V 5A time delay (T on the fixture, T or L on the fuse) 20mm fuses.
Jamtastic3 Posted December 21, 2008 Posted December 21, 2008 Methinks the OP is in the USA Ah, ok. I kind of thought that was the case...
Pinspot Posted December 21, 2008 Author Posted December 21, 2008 Yeah Im in the USA. The fixture manual said to check for a sticky label on the fuse holder for the correct voltage/amp fuse but there is no sticky label so I really don't know if the fuse that's in there is correct. Does any one know what the fuse specs. are for a mini scan hpe fixture operating at 120V?
Andrey Posted December 22, 2008 Posted December 22, 2008 Hi. I don't remember the fuse specification for 120VAC, but I know that power consumption of MiniSacn HPE on 120VAC is about 900W. In other words fuse rate must be not lower then 7,5 A. Only one fuse is broken because second in fuse holder as I remember is spare. The situation you are talking about looked very close to situation with one of our customers who connected metal halide lamped fixture to dimmer line. The symptoms were the same: after switching power on fixture runes the homing procedure and all looked Ok. But after about 2 minutes system crushed: fuses blown and automatic circuit breaker switched off, ballast was very hot. After they are used last spare fuse they called me and I was very confused when found that fixture connected to dimmer line. Guys told me that outlet was first in order to fixture on the rig… :** laughs out loud **: Check your mains line connection. May be its your problem.
Pinspot Posted December 22, 2008 Author Posted December 22, 2008 I just talked to CP support and they told me I need a 10amp fuse to run theses fixtures at 120v. The lights are just on a standard circuit no dimmer. The 7amp fuse that I was using originally was not the right rating. I'll put in some 10amp fuses and see if it solves the problem.
Pinspot Posted January 7, 2009 Author Posted January 7, 2009 I put 10amp fuses in both lights and they now start up and stay on. One fixture works 100% and the other has a communcation problem. The only thing I can get to work on the fixture is when I change colors the mirror will tilt and then the whole fixture will home itself. Im talking with a CP tech to see if the electronics have to be replaced on it but not sure if its a big problem or not. The other fixture works find with the same dip switches on and same setup so Im thinking the electronics are not working all to well on this particular fixture. Thanks for everyone's help with the fuse problem,
regler Posted January 8, 2009 Posted January 8, 2009 I will post this here!! I have also a few problems with my 4 CP mini scans...2 of them have tilt problem...I found on one that tiny wire that goes to tilt stepper motor is melted..on second CP everything seems to bo ok, but tilt is not working...third one is having lamp problem...previus lamp was blown, so I replaced it with new one... unit is working, but lamp is not working..last one is having gobo rotation problems...they were installed in one club before, and when club was closed these units was given to me and they were in realy bad condition...how can I fix these problems? did anyone manage this problems? tnx..
Andrey Posted January 12, 2009 Posted January 12, 2009 I will post this here!! I have also a few problems with my 4 CP mini scans...2 of them have tilt problem...I found on one that tiny wire that goes to tilt stepper motor is melted..on second CP everything seems to bo ok, but tilt is not working...third one is having lamp problem...previus lamp was blown, so I replaced it with new one... unit is working, but lamp is not working..last one is having gobo rotation problems...they were installed in one club before, and when club was closed these units was given to me and they were in realy bad condition...how can I fix these problems? did anyone manage this problems? tnx.. According to my experience with CP if one of existing effects don't working properly there are 3 possible reasons: 1. Broken wires between PCB and stepper motor 2. Broken stepper motors driver on PCB 3. Broken stepper motor First of all check wires integrity. Open fixtures housing. Find control PCB. Find from PCB to motor cable (it should be labeled) for required effect. Make measuring of resistance on appropriated wagos connector between wires 1-2 and 3-4. Its values should be virtually equal and amount to about 30 – 70 Ohms depending of motor types. If not – it could be means as wires disintegrations as stepper motors failure. In this case you need to check it separately. If above defined resistances have "correct" values (that don't guarantee motors working capacity) check appropriated stepper motors driver IC 3771 and contiguous to it components, printed circuits... It could be that it was destroyed and you could see it visually. If all of them looked Ok try to replace IC 3771 by another (if you have no any new IC's take it from another effect that fully operable). If replacements of IC's don't give you any results it means that stepper motor is broken or terribly dirty. Try to replace it. About the lamp igniting. In your case it could be problem with safety thermo switch. You can find wiring diagram for miniscan at the CP website and check wire integrity and switchers. After that check voltages presence at igniters input. In case of operable igniter and voltage presence it should make a little buzzing during lamp igniting processed. In case of voltage presence and missing of buzzing most likely that igniter is broken. In any case don't touch of igniter's outputs terminal marked by "L". After making of simple tests above mentioned you can go to your local Clay Paky dealer for spare parts or service. Good luck.
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