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Dual 502: Full Service With The Infamous SM840 Motor 

Turntable Guy
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We will service this turntable with an inherent issue - the Dual SM840 motor.

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12 сен 2024

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Комментарии : 18   
@zopilotesky3014
@zopilotesky3014 Год назад
A fiberglass pen would work well cleaning the headshell contacts too, and is less invasive than harsher methods. They are cheap on eBay/AliExpress and are handy for many situations. Thanks for sharing.
@Poppinwheeeeellllllieeeeez
@Poppinwheeeeellllllieeeeez Год назад
Nice video. sm840......double time. "The bumblebee" is a reliable fix. The 50hz / 60hz issue and was never fixed under recall. I won't buy a turntable if it lacks pitch control. I prefer q lock. If it spins backwards the capacitors require replacement. Use new x rated safety caps on the pcb on the later models. Mr clean magic eraser or even better metal polish makes the headshell contacts look new.
@jrs1955
@jrs1955 Год назад
Interesting. My Dual 502, original owner bought in the mid 70s, came with the Shure M95ED cartridge. I've never, knock on wood, had that problem with the motor spinning too fast.
@robertbissonnette2466
@robertbissonnette2466 Год назад
Thank you! Saved a trip to look at buying a 502.
@tonysvinyl2214
@tonysvinyl2214 Год назад
There is a fix for this its something new that came out. A guy makes them and you wire it in.
@ebb2421
@ebb2421 5 месяцев назад
MFS-60 module fixes the SM840 motor issue
@alicioneto79
@alicioneto79 4 месяца назад
where can I find it?
@OneChartguitarlessons
@OneChartguitarlessons 8 месяцев назад
Really helpful video, thanks. Could have used some more explanation during the arm balancing near the end but v helpful anyways, thanks!
@paulredfern3832
@paulredfern3832 Год назад
Off topic, Found a pioneer PL 400 for sale locally. Any opinions on this model? Found you after getting a Technics SL-D202 and came across your video on it. It plays great. Now i think i have the turntable bug.
@Poppinwheeeeellllllieeeeez
@Poppinwheeeeellllllieeeeez Год назад
Be careful man....if you are not careful you'll wake up with 30 of them. PL 400 is a fine table.....check the rubber feet.....they probably need replacing or will soon. The sub-chassis will sink and the platter will rub on the chassis and cause huge issues. You can get new ones or just add some vinyl tape to reinforce the rubbers.....im sure there are other methods. Very common issue.
@paulredfern3832
@paulredfern3832 Год назад
@@Poppinwheeeeellllllieeeeez Thanks. I will take a look at the feet. 👍
@TurntableGuy
@TurntableGuy Год назад
The 400 is a good quality deck.
@paulredfern3832
@paulredfern3832 Год назад
@@TurntableGuy Thank you
@paulredfern3832
@paulredfern3832 Год назад
@@Poppinwheeeeellllllieeeeez Thanks for the headsup. The TT was in rough shape. But mostly it was the hanging down of the back right corner where the tonearm is attatched. Nowhere near level with the rest of the top surface. I could raise it up level by reaching underneath. I am sure that back foot was rotted out.
@vettrious
@vettrious 8 месяцев назад
SL-1300 is the way to go, clean , oil, concorde with sas stylus and you're done. No time wasted
@jeffsimon9594
@jeffsimon9594 7 месяцев назад
Ortofon is overrated IMO
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