8mm Forum


  
my profile | my password | register | search | faq | register | forum home
  next oldest topic   next newest topic
» 8mm Forum   » 8mm Forum   » My New GS1200

 - UBBFriend: Email this page to someone!    
Author Topic: My New GS1200
Paul Adsett
Film God

Posts: 5003
From: USA
Registered: Jun 2003


 - posted October 26, 2019 12:58 PM      Profile for Paul Adsett     Send New Private Message       Edit/Delete Post 
Thanks to the invaluable help and advice of forum members I have been able to restore my previously 'dead' GS1200 to full operating condition. In fact it is now performing just like new with rock steady projection and great stereo sound, better than it has been in years. So great to have this wonderful projector back in service.
Here is a summary of the repairs that were carried out:

Symptom: Take up motor not rotating in FWD projection
Main Control Board
Replaced large Matsushita relay NC4D-P-DC12V. Replaced rectifiers 1B2Z1 and IB2C1. Cleaned and sprayed all board interface contacts.

Symptom: Projector blows 3A main fuse on power up, no motors running
Motor Governor Board
Replaced the entire board due to failure of the NEC UPC1002C

Symptom: Excessive RFI noise through audio playback
BLOWER MOTOR Replaced broken inductor on blower motor with a 100 microfarad ferrite inductor

Symptom; Rewind slow and weak
Adjusted the lever position of both re-wind microswitches.

Sympton: Lamp does not reliably turn on
Replaced microswitch #6 fig 41 at lamp switch location.

Also:
Front cover hinge
Repaired the hinge pin which had broken away from the amplifier cover

In addition I sprayed all the switches with electrolube.

--------------------
The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,
Elmo GS1200 f1.0 2-blade
Eumig S938 Stereo f1.0 Ektar
Panasonic PT-AE4000U digital pj

 |  IP: Logged

Janice Glesser
Film Goddess

Posts: 3468
From: Sunnyvale, CA USA
Registered: Sep 2011


 - posted October 26, 2019 01:14 PM      Profile for Janice Glesser   Email Janice Glesser   Send New Private Message       Edit/Delete Post 
I feel your excitement Paul. A well running GS1200 is without exception the ultimate 8mm projector. You've reached Nirvana [Smile]

--------------------
Janice

"I'm having a very good day!"
Richard Dreyfuss - Let It Ride (1989).

 |  IP: Logged

Dominique De Bast
Film God

Posts: 4486
From: Brussels, Belgium
Registered: Jun 2013


 - posted October 26, 2019 01:52 PM      Profile for Dominique De Bast   Email Dominique De Bast   Send New Private Message       Edit/Delete Post 
Waw. Congratulations !

--------------------
Dominique

 |  IP: Logged

Mark Mander
Phenomenal Film Handler

Posts: 1236
From: Dunstable ,Bedfordshire.
Registered: Jan 2005


 - posted October 26, 2019 02:15 PM      Profile for Mark Mander   Email Mark Mander   Send New Private Message       Edit/Delete Post 
Well done Paul keeping another GS1200 performing as it should,Mark

--------------------
Elmo GS1200 1.0 lens
Elmo ST1200HD 1.1 lens
Sankyo 800 1.0 lens
Elmo 16CL
Elf NT1

 |  IP: Logged

Joe Taffis
Phenomenal Film Handler

Posts: 1592
From: United States
Registered: Jun 2003


 - posted October 26, 2019 04:36 PM      Profile for Joe Taffis   Email Joe Taffis   Send New Private Message       Edit/Delete Post 
I'm happy to see that you've got it running Paul! It didn't look good for a while [Roll Eyes]

--------------------
Joe Taffis

 |  IP: Logged

Adrian Winchester
Film God

Posts: 2941
From: Croydon, London, UK
Registered: Aug 2004


 - posted October 27, 2019 07:31 PM      Profile for Adrian Winchester   Email Adrian Winchester   Send New Private Message       Edit/Delete Post 
Compliments on having the dedication and skill (even with Forum expertise) to pull all of that off. It would probably have taken me about 15 years to complete!

--------------------
Adrian Winchester

 |  IP: Logged

Winbert Hutahaean
Film God

Posts: 5468
From: Nouméa, New Caledonia
Registered: Jun 2003


 - posted October 28, 2019 01:22 AM      Profile for Winbert Hutahaean   Email Winbert Hutahaean   Send New Private Message       Edit/Delete Post 
Good one Paul... it is nice if you have a little knowledge about electronics. I am zero.

So the spare parts you mentioned above are widely available in the market or need to go to specified stores?

cheers,

--------------------
Winbert

 |  IP: Logged

Paul Adsett
Film God

Posts: 5003
From: USA
Registered: Jun 2003


 - posted October 28, 2019 11:02 AM      Profile for Paul Adsett     Send New Private Message       Edit/Delete Post 
I had to farm out the soldering of the circuit board components. I can get by soldering motor wires and the like, but the board components, such as the big Matsushita relay, have extremely close pins and need a microscope and very steady hand for the precision soldering operation. You have to know your limits!
Leon can supply some of these components, and FFR in Germany can also supply new updated versions of the governor board.
I am really indebted to Phil Murat, Thomas Knappstein, Leon Norris, Stuart Finklestein, for their help and support. Could'nt have done it without them.

--------------------
The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,
Elmo GS1200 f1.0 2-blade
Eumig S938 Stereo f1.0 Ektar
Panasonic PT-AE4000U digital pj

 |  IP: Logged

Phil Murat
Jedi Master Film Handler

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


 - posted October 28, 2019 11:55 AM      Profile for Phil Murat   Email Phil Murat   Send New Private Message       Edit/Delete Post 
It was a pleasure, Paul .

Sharing our knowledges here is something I like first.

Have a great fun with your machine refurbished to the top.

 |  IP: Logged

Thomas Knappstein
Expert Film Handler

Posts: 124
From: Erwitte, Germany
Registered: Oct 2017


 - posted October 28, 2019 11:23 PM      Profile for Thomas Knappstein   Email Thomas Knappstein   Send New Private Message       Edit/Delete Post 
Hi Paul!
Nice to hear that your machine is coming back to life. I think, the original Main Motor is the key. This Matsushita Motors if they get older and dirtyer can need to much Amperes. It´s too much for the Rectifiers and some other Components on the main Board. I have changed this Motor to a german DUNKERMOTOR GR 42x40 24V 3100U/min. This are ball bearing Motors. Sometimes you can find them on Ebay. I´ve got four GS machines running with this Motors over 10Years now. No Problems over the time. The only Problem is you need the Generator Coil from the old Motor or a assembling by a Segment Disc with opto Coupler.

 |  IP: Logged



All times are Central  
   Close Topic    Move Topic    Delete Topic    next oldest topic   next newest topic
 - Printer-friendly view of this topic
Hop To:

Visit www.film-tech.com for free equipment manual downloads. Copyright 2003-2019 Film-Tech Cinema Systems LLC

Powered by Infopop Corporation
UBB.classicTM 6.3.1.2