8mm Forum: 8mm Projector Repair

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Topic: 8mm Projector Repair

John Barlow
Junior
Posts: 4
From: Liverpool UK
Registered: Aug 2012

posted August 03, 2012 11:36 AM

Hi All

This is my first post and I have a problem to solve.

I'm looking for help to repair a projector I have inherited. After investing in new belts, fuses and a new lamp I have discovered the real fault with this unit. Firstly you can see the model I have by going here

http://www.super8data.com/database/projectors_list/projectors_copal/copal_cp_402.htm

OK, the fault is with the framing, which causes the film to jump up and down. The frame control doesnt fix it nor does pressing on the loop former. When switching to reverse play it will hold the frame good for about 5 seconds and than start jumping again.

I am hoping it is just an adjustment that needs to be made. But where?

Trouble is I dont know where to start, maybe someone can tell me where to check or look for.

best

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Alexander Lechner
Expert Film Handler

Posts: 118
From: Leoben, Austria
Registered: Apr 2009

posted August 03, 2012 12:49 PM

I don't know your projector but what you are describing sounds like the film transport (the little pin that moves the film frame by frame) isn't working properly. Maybe you can post one or two pictures showing the area where this film transport pin is and, if approachable, of the whole film transport mechanism.
Greetings to scouser land!

--------------------
Alex

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John Barlow
Junior
Posts: 4
From: Liverpool UK
Registered: Aug 2012

posted August 03, 2012 01:11 PM

Ah Yeah, you know Liverpool!!

I plan to spend some time over the w/e and will take some pictures and Get Back from me to you [Smile]

I found an old B&H repair manual which has a trouble shoot chart and these things seem appropriate:

1 Shuttle Tooth Worn - Replace Shuttle Tooth Assembly
(Please NO!)

2 Misaligned shuttle tooth - Adjust and Align

3 Lower Loopformer Binding - Free Up Loopformer

there are others but these seemed most relevant. More later...

BREAKING NEWS
While in the process of removing the panels in order to take some pictures, I discovered that the grub screw which fastens the framing knob to its spindle was not tight enough. It gave the impression that it was OK but it was just scoring a groove on its spindle. Solution was to tighten it up with an allen key and hey presto all the problems have disappeared. So it was the framing control which was the problem and that is now solved.

Phew !!

[ August 03, 2012, 02:25 PM: Message edited by: John Barlow ]

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John Davis
Master Film Handler

Posts: 286
From: Dunfermline, Fife, UK
Registered: Jun 2008

posted August 03, 2012 04:43 PM

That's good news John, you seemed to benefited from that rarest of beasts a 'best case scenario' situation.
Copals are projectors that I'm not familiar with so I'd be interested to hear how well these work.

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John Barlow
Junior
Posts: 4
From: Liverpool UK
Registered: Aug 2012

posted August 03, 2012 05:35 PM

Copals are pretty good, up there with the best and quality construction. The CP Sound 402 under discussion is useful because it has speed control on a sound machine. The CP77 which I also have is a great workhorse dual format machine and doesnt fall over when a dodgy splice comes along.

All in, I like the Copals which also go by the name Sekonic.

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Janice Glesser
Film Goddess

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

posted August 03, 2012 06:22 PM

I love a success story [Smile]

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

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

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John Barlow
Junior
Posts: 4
From: Liverpool UK
Registered: Aug 2012

posted August 04, 2012 07:07 AM

Follow up:

After the fix I did notice some slight jumping which I easily repaired by bending the claw arm slightly away from the gate with some sharp nose pliers.

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