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 Post subject: LD Players from Japan (100V) in the US (125V)
PostPosted: 29 Sep 2017, 03:20 
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I purchased a brand spanking new 2004 Japan variant DVL-919 to take advantage of the LD-G capabilities. I thought I would "retire" my US DVL-919 player as part of the "upgrade" to LD-G. Being that I didn't want to have a 100V step-down adapter, I decided I would swap the power supplies between the two players.

Interesting note - When you buy a DVL-919 through the Army/Air Force Exchange, you don't get a 125V player, you get one that auto-selects. So, continuing on, I moved my 110-240V power supply into the Japanese DVL-919 and all worked as I expected.

Then I noticed something very interesting. The back of the Japan player clearly states 100V. However the power supply board that came with the player is a 125V VWR1286 supply for the "KU/CA" player, which is the "Type" for US & Canada. Remounting the original power supply into the DVL-919 (J) player, it did indeed run perfectly fine on 120V power (or whatever voltage Puget Sound Energy feels like providing today).

So, my question is this. Is it normal for manufacturers to install 125V power supplies Japanese equipment? I just picked up a MUSE MSC-4000 decoder and it also shows 100V on the back of the unit, but the power supply boards are clearly marked as 125V.

I've also been very successful on running the 220V DVL-919E players from Europe on US 120V power without any modifications. It makes sense to build power supplies for the US that only work in the US, but it also makes sense that Power Supplies that runs on other voltages (220V) on US power as well.

Thoughts?
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 Post subject: Re: LD Players from Japan (100V) in the US (125V)
PostPosted: 29 Sep 2017, 04:40 
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I do know that this is the situation with the R7G, it is marked on the back for 100v but has the 120 inside.
So it wouldn't surprise me much if there were other players.
I believe Kurtis said something about this once but it could have been somewhere else that I read it also.
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 Post subject: Re: LD Players from Japan (100V) in the US (125V)
PostPosted: 30 Sep 2017, 01:05 
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It is true you have to look at the power supply. Some Japanese units have 100V supplies and others have 125V supplies. Go with what is on the actual power supply board as a properly designed 125V supply will work fine on 100V but the other way can burn out parts quicker.
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 Post subject: Re: LD Players from Japan (100V) in the US (125V)
PostPosted: 25 Oct 2017, 19:04 
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I opened up my HLD-X9 (had to replace the turntable rubber) and the MSC-4000 MUSE decoder and both were 125V inside. I'm not using a step-down transformer for either.
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 Post subject: Re: LD Players from Japan (100V) in the US (125V)
PostPosted: 25 Oct 2017, 21:56 
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It’s super common in all sorts of things. Even if it isn’t, unless your step down was a few hundred bucks it stands a much greater chance of ruining your player than %10 more VAC does. If I had more exotic analog stuff I’d be concerned, like an early CD player with six power supplies or tube state amps.
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 Post subject: Re: LD Players from Japan (100V) in the US (125V)
PostPosted: 26 Oct 2017, 10:15 
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signofzeta wrote:
It’s super common in all sorts of things. Even if it isn’t, unless your step down was a few hundred bucks it stands a much greater chance of ruining your player than %10 more VAC does. If I had more exotic analog stuff I’d be concerned, like an early CD player with six power supplies or tube state amps.


Really? I step down from 240 to 110 and 100 all the time for decades and never had anything ruined by it.
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 Post subject: Re: LD Players from Japan (100V) in the US (125V)
PostPosted: 26 Oct 2017, 15:32 
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blam1 wrote:
I opened up my HLD-X9 (had to replace the turntable rubber) and the MSC-4000 MUSE decoder and both were 125V inside. I'm not using a step-down transformer for either.


Very interested to read that about the X9 Blam, also had to change the rubber grip but didn't think to check that at the time. Have read several posts here and there on-line stating how the X9 is very fussy on supply voltage and you really need to make sure it's 100V.

Australia is usually stated as 240V, but here in WA the supply is 250V, and I usually measure it at 250-255V. I went the specific Japanese step-down (rather than US), but it's designed for a 220-240V input so I'm still getting about a 110V (or slightly more) output. Given what I'd read was mildly concerned but have to say never noticed any issues and your info puts me totally at ease! Also went a decent quality toroidal transformer.
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 Post subject: Re: LD Players from Japan (100V) in the US (125V)
PostPosted: 26 Oct 2017, 18:09 
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Step down is much different for some stuff vs step up.
I've read the same thing about the players like the X9 and X0 or even some of the older ones but don't have any experience first hand with that
other than the R7G which was fine with no issues.
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 Post subject: Re: LD Players from Japan (100V) in the US (125V)
PostPosted: 26 Oct 2017, 22:34 
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There isn’t going to be any issue unless the transformer shorts internally. If it does and it’s old/cheap it may send 240VAC strait to your equipment. Protection is the thing that gets cheaped out on first.

Same thing can happen up or down, transformer or IC based, doesn’t matter. Quality is key, modernity helps.
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 Post subject: Re: LD Players from Japan (100V) in the US (125V)
PostPosted: 26 Oct 2017, 23:39 
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I've got 2 DVL-919E players that show 220-240V. I have had ZERO problems plugging them straight into a 110v outlet in the US. If there was an issue, all of the DV* series LD players are the same basic design and you could simply pull the 120V board out of a US player and load it into the 220V player.
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 Post subject: Re: LD Players from Japan (100V) in the US (125V)
PostPosted: 27 Oct 2017, 01:26 
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Great thread blam1 .....

Learned a tid bit here ......

Cheers to the membership !
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