Mr_Smith

I have a pair of Leica 10x42 Geovid. Great binoculars but not the best for looking at the night sky. 

You guys are amazing. I’ll search Amazon and get some T rated fuses ordered. Fingers crossed this is the problem. Once they arrive I’ll test it all and report back. 
 

Oh……thank you all very much. 

5 minutes ago, Carbon Brush said:

Do you still have the blown fuse?
If so, can you read the numbers and letters from the end caps?

 

F5AL250V

I’ve just tried this 12v air compressor in the battery pack and it worked fine.

30 minutes ago, wulfrun said:

Ah OK, that adds to the confusion then! If the mains power supply works fine, then the mount must be OK with no power shorts. No need to start messing there. In that case, logically the 5A fuse is inadequate. It's not unusual for electronics to have a current-surge at power-on but I'd be very wary of just upping the fuse rating.

What exact type of fuse is the one that blew? Is it definitely the recommended fuse?

It was the same as this one…. 12v 5amp 

The battery pack output is 12.4v, I’ve tested it. 

32 minutes ago, wulfrun said:

OK, kind of not unexpected. Next step is to get at the power leads inside the mount and trace back then. Once inside I'd expect an obvious short somewhere since you know the mount works. Sadly, it's not my area of knowledge and you'll have to wait for someone else to guide you on it. Before doing so, just double-check if the fault is present with mount switched OFF as well as ON. If it's still there with the mount OFF it pretty much narrows it down to the mount's power socket itself.

If you power it from mains, are you still using the same 12V socket on the mount? Just realised that that would be puzzling if it works OK that way.

I am using the same lead when running it on mains power and plugged into the same socket on the mount. 

13 minutes ago, wulfrun said:

Next step would be to take meter readings on the mount then (no power applied). Use the Ohms range and test both ways with the meter leads. If you can't easily get at the mount socket terminals, use your lead and test the cigar-end. Just to repeat...the powerpack is NOT used or connected at all for this bit.

Just done that and got readings both ways. 

1 minute ago, wulfrun said:

No, you're completely right, the mount draws what it needs (provided there's an edequate supply).

Thank you. This is baffling me…

What baffles me is that it’s a Skywatcher power pack and a Skywatcher mount. Surely they should be compatible right? 

Just checked the continuity, all is good. The lead is now plugged into the power pack and it’s staying ‘on’ as in powered. 

Just checked the continuity, all is good. 

So I’m guessing the 10amp output was too much. I always thought that the mount would only draw the amount of amps that it needed though. Or am I completely wrong? 

Thank you, I do have a multimeter. The fuse blew as soon as I turned the power pack on. The fuse that blew was 5amp 

Hi, I use a HEQ5 Pro powered from the mains and it works perfectly but when I try to power it from my Skywatcher power pack cigar lighter socket it blows the fuse in the lead. It works ok via the USB port but not from the 12v cigar socket. Any ideas how to get this to work? 
 

The output on the cigar socket is 12v 10amp. 
 

Regards

Gray