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Topic: Need Beaulieu 708 EL Advice

Zechariah Sporre
Jedi Master Film Handler

Posts: 557
From: Ladysmith, WI U.S.A.
Registered: Dec 2010

posted March 30, 2014 01:00 PM

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I have a Beaulieu 708 EL. The capstan motor doesn't run. I don't believe it's the motor though because the motor doesn't seem to be getting any voltage. Does anybody have any ideas what I should look at? It doesn't work regardless of whether it is on 18 or 24 fps or if it's fixed speed or variable.

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There is a fine line between a hobby and a mental illness

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Rob Young.
Phenomenal Film Handler

Posts: 1633
From: Cheshire, U.K.
Registered: Dec 2003

posted March 30, 2014 05:26 PM

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Sounds like failure of the capstan drive motor.

Usually due to failure of the board which drives the motor, replacing the motor will help short term, until the board destroys it again.

We've had threads regarding this here before and I've had personal experience of this.

Involving John Hermes thread regarding Beaulieu issues, let's open this up in a new thread called, "Beaulieu's Owner's Club"

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted April 04, 2014 10:59 AM

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Have you tried running the motor off a separate supply for several hours Zechariah? This way you would be able to establish if it is the motor at fault or otherwise. An electric train set transformer with voltage output regulator (or similar) would work for your experiment.

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"C'mon Baggy..Get with the beat"

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Zechariah Sporre
Jedi Master Film Handler

Posts: 557
From: Ladysmith, WI U.S.A.
Registered: Dec 2010

posted April 04, 2014 12:52 PM

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I did not test it. Just checked with a voltage tester and there seemed to be no power there. That is a good idea on the train regulator. I do have one with the variable speed. Thanks for the advice. I did order some of those cs140 circuits but is gonna take a little bit because they are coming from China.

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted April 04, 2014 02:10 PM

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just ensure you regulate the voltage first to the voltage supplied to the motor by the projector and no more Zac.

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"C'mon Baggy..Get with the beat"

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Zechariah Sporre
Jedi Master Film Handler

Posts: 557
From: Ladysmith, WI U.S.A.
Registered: Dec 2010

posted April 07, 2014 06:30 PM

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Well I tested the motor as you suggested, Andrew. And the motor doesn't work [Eek!]

[Eek!]

I wonder if I have more then one issue going on [Confused]

[Confused]

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted April 08, 2014 05:17 AM

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well at least you know you need a new capstan motor now and while it is out of circuit you can check whether or not you have a supply voltage to it from your existing motor control circuit board.

[ April 08, 2014, 04:27 PM: Message edited by: Andrew Woodcock ]

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"C'mon Baggy..Get with the beat"

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Alessandro Pavoni
Master Film Handler

Posts: 255
From: Zürich/Switzerland
Registered: Sep 2009

posted April 08, 2014 12:32 PM

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Hi Zechariah, where did you buy in China the CS140???
let me know
thanks

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Zechariah Sporre
Jedi Master Film Handler

Posts: 557
From: Ladysmith, WI U.S.A.
Registered: Dec 2010

posted April 08, 2014 06:25 PM

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I bought them from Aliexpress. We will see, hopefully it is legit and I actually get them [Frown]

[Frown]

Sounds like some sellers on there are okay and some aren't. I will update when and if I get them. But at 10 for $38 I figured it was worth a shot.

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Zechariah Sporre
Jedi Master Film Handler

Posts: 557
From: Ladysmith, WI U.S.A.
Registered: Dec 2010

posted April 24, 2014 06:33 PM

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Well my circuit boards arrived today [Smile]

[Smile]

Now the fun task of trying to install one.

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Alessandro Pavoni
Master Film Handler

Posts: 255
From: Zürich/Switzerland
Registered: Sep 2009

posted December 14, 2014 08:20 AM

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Hi Zechariah, did you fix your Beaulieu 708??
Wher did you get this IC cs 140 ???China?? they are good???
thanks

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted December 14, 2014 11:48 AM

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Bill Parsons sells these IC chips and all that he has fitted to customers machines have worked perfectly he told me. I purchased one from him in the summer to hold as a spare for my machine. At the time, Bills were also the cheapest available.

[ December 14, 2014, 02:54 PM: Message edited by: Andrew Woodcock ]

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"C'mon Baggy..Get with the beat"

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Flavio Stabile
Jedi Master Film Handler

Posts: 707
From: Roma, Italia
Registered: Feb 2005

posted December 14, 2014 11:26 PM

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Hi Andrew,
How difficult is to replace the cs 140 on the Bealieu?
Is it directly soldered on the board, or a socket is present so you dont't have to solder anything?

Flavio

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted December 15, 2014 05:01 AM

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It is directly soldered to the board I think Flavio not too far away from the Capstan motor driven flywheel. I have a photograph of my machine showing it's location (CS140) on the circuit board plus the L200's if you would like me to send it to you in an e mail?

I have not had any issues so far with my speed regulation, just an intermittent fault with the STK stereo amplifier chip due to it having bad dry joints, that is it. I had it repaired by a top vintage electronics engineer and it has been absolutely fine since (Coming up to 10 months now).

It will require a professional soldering job and sometimes one or two other electronic parts appear to need changing at the same time (L200 IC for Voltage & Current regulation), but if you are a decent solderer it will be 16 joints to repair minimum for the CS140.

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"C'mon Baggy..Get with the beat"

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Maurice Leakey
Film God

Posts: 5895
From: Bristol. United Kingdom
Registered: Oct 2007

posted December 15, 2014 08:47 AM

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From my own personal experience, dry joints on any projector, and mainly its amplifier, have been the cause of many, many, problems.

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Maurice

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted December 15, 2014 08:53 AM

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All good though Maurice once sorted!

I guess it is only to be expected from 30 to 40 year old soldered joints at the end of the day.

Once brought back to new, all is fit and well again for another 30 - 40 years hopefully! [Razz]

[Razz]

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"C'mon Baggy..Get with the beat"

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