8mm Forum: Sankyo 600 old motor board repair

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Topic: Sankyo 600 old motor board repair

Barry Webb
Film Handler

Posts: 79
From: Cornwall, England.UK
Registered: Jan 2010

posted April 06, 2016 09:35 AM

Following on from the no power problem on the sankyo 600 we hace traced the problem down to a SCR or Silicon Controlled Rectifier the part needed is a SFOR2B41.
If any body has one of these that there willing to post that would be good of if anyone has a old motor board from a Sankyo 600 for sale that also would be good.
I have a electronics expert working on this for me and he has told me that the part was rare but someone might just have one kicking around.
Barry.

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Steve Klare
Film Guy

Posts: 7016
From: Long Island, NY, USA
Registered: Jun 2003

posted April 06, 2016 09:48 AM

Aparently there is a modern (and common) equivalent: NTE5402

Why not ask your electronics guy to compare the two parts and see if it's at least close enough?

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All I ask is a wide screen and a projector to light her by...

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Barry Webb
Film Handler

Posts: 79
From: Cornwall, England.UK
Registered: Jan 2010

posted April 06, 2016 10:07 AM

Hi Steve thanks for that I have got feedback from my guy and he says its not sensitive enough on the gate trigger.
Barry.

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Mark Creighton
Junior
Posts: 21
From: Schodack, NY, USA
Registered: Mar 2016

posted April 06, 2016 10:07 AM

This site lists the NTE5402 is a replacement for the SFOR2B41. http://www.vetco.net/catalog/product_info.php?products_id=4472

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Barry Webb
Film Handler

Posts: 79
From: Cornwall, England.UK
Registered: Jan 2010

posted April 06, 2016 10:34 AM

Thanks Mark I have passed this on.
Cheers Barry.

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Steve Klare
Film Guy

Posts: 7016
From: Long Island, NY, USA
Registered: Jun 2003

posted April 06, 2016 11:52 AM

Worse come to worse you may need to use the NTE5402 and increase the sensitivity of the gate by adding in a pull-up resistor to the DC voltage operating the circuit, you could even make it a potentiometer to fine tune it.

-getting the original part is the first choice, but it's always nice to have plan "B" in your back pocket.

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All I ask is a wide screen and a projector to light her by...

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