Micro Seiki DQX 1000 - motor - diyAudio
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Old 13th May 2010, 12:34 PM   #1
Aleko is offline Aleko  Bulgaria
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Default Micro Seiki DQX 1000 - motor

Hello everyone,

The direct drive motor for my Micro DQX 1000 needs repair .
The reason being that the spindle is very lightly bended .
The platter makes small waves when benchmarked to a straight line.
Please, have in mind that this is not a spindle only.
It is a rotor with a round magnet attached to it.
I was foolish enough to take the spindle/rotor to a metal working shop to try to make it straight.
And they did thei rbest and used only wood and hit it very lightly on the one side but the effect is anyway not good as now there is even some friction .
This metal is soft.
Ordered the Van Den Hul spindle oil to try.

In short, need a new motor or a new rotor (the spindle and attached magnet ).

Highly appreciate if anyone can advise from where I can obtain it orwhat else if anything I can do.
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Old 13th May 2010, 01:44 PM   #2
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Can you show a picture of the rotor or the whole assembly? It is possible that Micro Seiki outsourced their motor from other manufacturer and you might be able to find the same motor or parts from a turntable of another brand. I know many Yamaha models used JVC motors such as the on in the PX2 and PX3 are identical motors in many JVC turntables. And list the motor model number.
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Old 13th May 2010, 06:52 PM   #3
Aleko is offline Aleko  Bulgaria
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Default Micro Seiki DQX 1000 - motor

Directdriver,

You are right :

The motor is JVC 574-94V-1.

Uploaded 3 photos .

Regards,
Aleko
Attached Images
File Type: jpg P5130007.jpg (437.6 KB, 434 views)
File Type: jpg P5130008.jpg (356.7 KB, 358 views)
File Type: jpg P5130011.jpg (367.4 KB, 346 views)
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Old 13th May 2010, 09:31 PM   #4
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The wavy rotation may not have to do with a bent spindle or bearing shaft. If you were able to rotation the bearing smoothly then it wasn't the bearing shaft's problem. It is possible the bronze taper sleeve that fit into the platter hole is dented or had uneven surface. I had something like that happened to me before and I took the shaft out and clamped it to a drill and sand papered the bronze sleeve and solved the problem but your hammering the spindle could only make it worse.

That motor looks familiar. It's very similar to the JVC QL-5 but the motor model is M935A.

Partstore.com has JVC motors for sale you can perhaps ask them about this motor model.

The flange is different from the QL-5 but the other parts look similar. Here are some pictures from a repair in Japan.

Click the image to open in full size.

Some pictures of the higher model QL-7 in disassembled form. Different motor but spindle is similar.

Even if the rotor on the QL-5 is the same, there's no guarantee the taper spindle will fit the Micro-Seiki platter. I hope all these information helps.

Click the image to open in full size.
Attached Images
File Type: jpg JVC_QL5_M935A_motor.jpg (278.2 KB, 110 views)

Last edited by directdriver; 13th May 2010 at 09:37 PM.
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Old 14th May 2010, 06:29 AM   #5
Aleko is offline Aleko  Bulgaria
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In my case there is no tolerance where the platter joins the spindle.
Unfortunately the spindle was/is bended.
I guess it had been carried with the platter left on and it is a heavy platter.
Made a mistake last night above about the exact motor designation.
The correct one is: JVC S74-94V-I
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Old 14th May 2010, 01:55 PM   #6
Aleko is offline Aleko  Bulgaria
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Default Micro Seiki DQX 1000 - motor

Directdriver,
Partsstore were unable to tell me which other motors does the spindle they have fit.
The motor I am looking for JVC S-74-94V-I does not appear in their database.
Besides that they said that they do not ship overseas and I better contact JVC directly.
This is quite reasonable but I doubt that there will be any support from JVC in respect of this long time ago discontinued product.
In short, I haven't progressed much .
Will try JVC ...
Regards,
Aleko
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Old 19th May 2010, 08:41 AM   #7
Aleko is offline Aleko  Bulgaria
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Directdriver,
Latest findings are:
The spindle appears to be absolutely straight.
This is good news so far.
Possibly the bearing is a little worn.
The magnet - brass insert joint is not very stable which creates unbalanced rotation of the magnet.
The QL5 motor is different.
Best regards,
Aleko
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Old 19th May 2010, 05:41 PM   #8
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Quote:
Aleko: "The magnet - brass insert joint is not very stable which creates unbalanced rotation of the magnet."
Perhaps you can replace just the brass ring salvage from beater table with similar motor structure? I used to have a QL-5 I bought for dirt cheap. I salvaged the tonearm and sold the rest. I wish there's another JVC model that uses the same motor as in the DQX-1000. Good luck!
.
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Old 19th May 2010, 09:38 PM   #9
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There was one Luxman table that was said to be Micro Seiki in origin (I don't know for sure) but you might try Luxman to see if they used the same motor in a machine of theirs. If so they might have parts in stock. Just a suggestion.
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Old 20th May 2010, 01:15 PM   #10
Aleko is offline Aleko  Bulgaria
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Default Micro Seiki DQX 1000 - motor

Have been offered a motor for Victor TT101.
JVC TT-101 Owners Manual, Service Manual, Schematics, Free Download | Vinyl Engine
The spindle looks similar and the motor has a servo control.
But cannot ask the seller to dismantle it just in order to see the model designation inside.
It is up to me to check if it will fit or not.

This site explains some similarities between those TTs:
Micro Seiki DDX-1000 on TVK

A TT with the same motor seems to be the Marantz Esotec TT Marantz Tt 1000 on TVK
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