Akai 1710 power/fuse issue

daidalos · 29th December 2009, 07:34 PM

First of all, I'm very excited to be here. This place is a huge source of knowledge, and I have A LOT to learn.

I recently acquired an Akai 1710 reel to reel japanese model (w/ selectable voltage switch). The unit worked for about an hour until the fuse blew (2A 125V). When inspecting the unit I noticed the voltage switch was set to 110V instead of 120V. I could not find a 2A 125V fuse, so I went with a 2A 250V fuse. With voltage switch set to 120V, the 250V fuse allows the machine to power on for a few seconds before blowing the fuse again.

The 250V fuse should be ok as a replacement, and raising the voltage switch higher than 120V wouldn't make a difference since the source output is 120, right?

Any suggestions on why a fuse would keep blowing like this? I only have an elementary understanding, building pedals and such from schematics, so this is way out of my league.

I would appreciate any help, I just need some guidance. Thanks.

nigelwright7557 · 29th December 2009, 08:35 PM

Its a matter of working your way through from the power supply.
Then check output transistors.
Could be a motor fault.

daidalos · 30th December 2009, 09:28 PM

ok, I'll start with the power supply, and post any progress/additional questions. Thanks.

29th December 2009, 07:34 PM	#1
daidalos diyAudio Member Join Date: Dec 2009 Location: Murfreesboro, TN	Akai 1710 power/fuse issue First of all, I'm very excited to be here. This place is a huge source of knowledge, and I have A LOT to learn. I recently acquired an Akai 1710 reel to reel japanese model (w/ selectable voltage switch). The unit worked for about an hour until the fuse blew (2A 125V). When inspecting the unit I noticed the voltage switch was set to 110V instead of 120V. I could not find a 2A 125V fuse, so I went with a 2A 250V fuse. With voltage switch set to 120V, the 250V fuse allows the machine to power on for a few seconds before blowing the fuse again. The 250V fuse should be ok as a replacement, and raising the voltage switch higher than 120V wouldn't make a difference since the source output is 120, right? Any suggestions on why a fuse would keep blowing like this? I only have an elementary understanding, building pedals and such from schematics, so this is way out of my league. I would appreciate any help, I just need some guidance. Thanks.

29th December 2009, 08:35 PM	#2
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	Its a matter of working your way through from the power supply. Then check output transistors. Could be a motor fault. __________________ http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software.

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30th December 2009, 09:28 PM	#3
daidalos diyAudio Member Join Date: Dec 2009 Location: Murfreesboro, TN	ok, I'll start with the power supply, and post any progress/additional questions. Thanks.

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