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Topic: PCBs - repairs

Steven J Kirk
Jedi Master Film Handler

Posts: 873
From: Southern England
Registered: Apr 2008

posted January 31, 2017 07:44 PM

Anyone have any experience of firms that will work on PCBs and maybe make replicas, etc. Many of us have projectors with now irreplaceable boards and I'm wondering what is possible. I have made an enquiry to the British firm IER but haven't had a response yet.

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VistaVision
Motion Picture High-Fidelity

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Tom Spielman
Master Film Handler

Posts: 339
From: Minneapolis, MN, USA
Registered: Apr 2016

posted January 31, 2017 09:36 PM

I have no personal experience with this kind of thing and have not yet ventured beyond breadboarding for my own electronics projects. I have explored the idea of having a custom PCB made and done a little research. You can even make your own PCBs using a laser printer, copper clad laminate and an iron.

As you mentioned there are places that will clone an existing PCB for you but I'd be reluctant to send an irreplaceable board anywhere unless I had someone I trust recommend them.

There are a few DIY options. PCB design software is readily available, - even online versions. If the PCB is relatively simple and you can identify the components, it wouldn't be hard to recreate the design in software. There are also lots of places that will take an "eagle file" from one of these PCB design apps and produce the PCB for you. Going this route means you don't have to send your current PCB anywhere.

If you're interested, SparkFun has some great tutorials

I can't remember off hand the name of the guy that uses 3D printing to reproduce common projector parts but this might be a natural extension to his business, especially if there are PCBs in popular projectors that are known to have parts that fail.

[ February 01, 2017, 07:39 AM: Message edited by: Tom Spielman ]

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Phil Murat
Jedi Master Film Handler

Posts: 671
From: Villeneuve St Georges, France
Registered: Dec 2015

posted February 01, 2017 05:16 AM

Hi Steven,

I use "TCI" Software (Easy to use and Free).

Here is a PCB (single lay) just achieved from TCI "Typon" :

The nude PCB was printed for 10 Euros (Epoxy FR4, 16/10mmm), fully drilled out and "Waved" Tin coated , all inclusive price.

Exemples ==>
- Single Lay rate : 13,30 Euros/dm2 (Qty 1 to 4)
- Dual Lay rate : 14,50 Euros /dm2 (Qty 1 to 4)
However in cases of Dual lays the compagnie I used is not in position to perform "Links Bushing" installation between lays , as necessary.
Pré-Drillings (0,8mm) & cuts are performed on a CNC machine fitted with carbide tools.

[ February 01, 2017, 08:01 AM: Message edited by: Phil Murat ]

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Steven J Kirk
Jedi Master Film Handler

Posts: 873
From: Southern England
Registered: Apr 2008

posted February 01, 2017 10:24 AM

Thanks for these quick replies. I am also reluctant to trust a PCB to the post when I only have one and the machine is inoperable without it. I'm trying to find a firm local to me. There are several firms like IER that seem very professional and I am sure will be expensive.

Maybe I will look into more work myself. I have some experience with soldering and cleaning switches but I have no training in it.

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VistaVision
Motion Picture High-Fidelity

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted February 01, 2017 07:53 PM

Good Job Phil !! [Wink]

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

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Phil Murat
Jedi Master Film Handler

Posts: 671
From: Villeneuve St Georges, France
Registered: Dec 2015

posted February 02, 2017 12:05 AM

Thanks Andrew,

Considering above mentionned exemple (Picture) , "Typon" has been done from a schéma. It was my first one and it tooks me one week, only working a few time, some time to time, because it is very tiring for the sight.
As Steven , Tom say, I do not suggest to sent the part to clone to anybody.
Anyway, He can take very good pictures from each side of PCB and record all components references available first.
If some of them are difficult to identify (Resistors, Caps, etc...) they have to be check with Multifunctions Tool (it can be necessary to remove the component for better accuracy).
Anyway, doing himself the drawing, it needs many times but he save lot of money (probably around 100 Euros for a small PCB 10cm x 10cm, "classical" electronic).

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted February 02, 2017 08:37 AM

It's a great replica Phil and I would be interested in obtaining a few of these if you ever produced any for the Beaulieu models.

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

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Phil Murat
Jedi Master Film Handler

Posts: 671
From: Villeneuve St Georges, France
Registered: Dec 2015

posted February 02, 2017 09:01 AM

Hi Andrew,

The exemple above is not a replica but an "Original" device, carried out from a schematic diagram, just finished and not tested yet.
Concerning Beaulieu's PCB, the drawing has been initiated. Some components value are still unknown (Small caps).
Moreover, big connectors are "obsolete"(no more available) and need to be replaced as a set (Male/Female connectors).
A connector dedicated to Power Ampli has to be has installed and relocated.
Also, if possible, I would like to delete both "diodes train" for a powers regulators (This is an other story)

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted February 02, 2017 09:29 AM

The values could be found from the electrical schematics I have Phil for any capacitors or anything else for that matter.
Let me know what you're seeking.

Every single component is listed there.

Also which components off the board are you saying are now obsolete. I've managed to find any I've looked for including the STK amplifier chipset.

I agree though, these should be mounted into a connecting block on the board as an improvement, not soldered directly to the board as is currently the case.

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

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Phil Murat
Jedi Master Film Handler

Posts: 671
From: Villeneuve St Georges, France
Registered: Dec 2015

posted February 02, 2017 11:13 AM

Andrew , have you got the schematic for Regulation Version 2, I mean Stereo Model Regulation ?

I am after for this one for a long and never found it. I have just the Mono one, which is a bit different from STEREO and not interchangeable with Stereo one.

Anyway ,if not available , I will make the measures, this is not a big problem.Anyway, I can also use the "L200C Datasheet" and make a comparison with installation exemples described in the Datasheet.

These one are have unknown value :

- Tentalum caps C8 / C10 / C16
- Ceramical ??? Cap C17

I am afraid the Black Bar Connectors are "obsolete" now and difficult to find.
That should be a good opportunity to fit new "Bus" Connectors showing a better electrical contact capability.

Let me know if you find the typical "Stereo" Regulation schématic as this is missing in my documentation.

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted February 02, 2017 11:45 AM

Yes the manual purchased for oldtimers Cameras covers a the range including the Stereo models.

The only ones that are not covered are the fadecomputer models and HTI variants, but the electronics for the amp section would be the same I'd predict.

When I am next off work, I will look these components up for you and give you the values for each Phil. [Smile]

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

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