[Solved] Printer won't turn on

jeffhuber · Post by **jeffhuber** » Mon May 18, 2015 10:48 pm

I have about a year old rostock max v2 with the viotek 450W power supply. It's been working great, but went to turn it on today and nothing happens. I can't hear any fans running. How can I diagnose this issue? thanks! (i have a multimeter)

Tincho85 · Post by **Tincho85** » Mon May 18, 2015 11:34 pm

Unplug the PSU from the Rambo, check the power switch wiring (green and black if I recall) and try to turn it on.

If it does, then it's not the PSU. Rambo fuses maybe?

jeffhuber · Post by **jeffhuber** » Tue May 19, 2015 5:52 pm

Hmmm no dice. Unplugged PSU from Rambo, power switch is ok. But I turn on the printer and I nothing happens in the power supply. I expect I should at least hear a fan spinning?

KAS · Post by **KAS** » Tue May 19, 2015 5:57 pm

If you have a voltage meter you could check at the power connector where it attaches to the Rambo. If you're not getting 12v there you could have a blown fuse in the power supply. I believe the stock power supply's fan always runs when switched on.

Just obviously unplug the mains if you open up the power supply to poke around.

Tincho85 · Post by **Tincho85** » Tue May 19, 2015 7:53 pm

If you are going to open the power supply, be VERY careful. The capacitors can hold a charge for long after they have been switched off (they are charged to ~320vDC).
But they are shunted by bleeder resistors which will reduce the voltage to a safe value in a minute or two.

To be sure, wait five minutes after unplugging the PSU before touching anything inside.

http://www.tomshardware.com/forum/16195 ... -dangerous

Post by **Eaglezsoar** » Wed May 20, 2015 12:38 pm

Tincho85 wrote:If you are going to open the power supply, be VERY careful. The capacitors can hold a charge for long after they have been switched off (they are charged to ~320vDC).
But they are shunted by bleeder resistors which will reduce the voltage to a safe value in a minute or two.

To be sure, wait five minutes after unplugging the PSU before touching anything inside.

http://www.tomshardware.com/forum/16195 ... -dangerous

Thanks for the safety tip!

jeffhuber · Post by **jeffhuber** » Fri May 22, 2015 12:01 am

thank you also for the safety tip! I took apart the power supply - and well I didn't see any issues - I concluded that it was fried since it wasnt delivering any power. thanks for the help!

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[Solved] Printer won't turn on

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