posted November 16, 2011 12:04 AM
I may have spoke too soon about keeping the 7800. I watched a film tonight and found another problem. It is running too fast. I know the songs from "Grease" quite well and in the film I watched, the singers sounded like they all had inhaled a little helium.
Can this be fixed?
-------------------- There's a great big beautiful tomorrow just a dream away.
Posts: 5468
From: Nouméa, New Caledonia
Registered: Jun 2003
posted November 16, 2011 10:17 AM
When you say high pitch on a song of "Grease", did you notice the tempo is different (faster) or the same.
In a digital DJ Turntable, there are two buttons that create similar sympthom.
One is a button for TEMPO. This you can speed up or slow down the song. The result you will higher pitch (if speed up) but also faster beat.
The second button is for KEY. This we can high or low the key without changing the beat (i.e same tempo).
Since we are talking a projector which I think goes with the same principle, perhaps, you can check if youurprojector has those kind of pin adjustment inside the board.
The tempo is faster and the key is higher. There appears to be nothing inside that would adjust either. The projector is running at more than 24 frames per second. I don't know how to fix it.
-------------------- There's a great big beautiful tomorrow just a dream away.
posted November 16, 2011 12:11 PM
I believe the bulb is supposed to stay on glowing with about 3 volts applied to it. This is called pre-heating the lamp so that it does not shock the filament when the full 12 volts are applied during projection. It really makes your lamps last much longer.
For the scratchy volume controls just spray them with a contact cleaner made for that purpose and all electronic stores will carry that and some hardware stores too.
As for sound chatter, just live with it, because you will never get rid of it. There is no real solution to that problem without a major modification to the projector itself. Read the old post here on this forum called "24 fps chatter" to fully understand it. But rest assured there will be nothing you can do to fully eliminate it.
The best way to avoid dirt in your film gate is to clean all your films since that is what is depositing all the dirt in your film gate to begin with. That should reduce the problem significantly.
I thought the Chinon projectors all use a standard power cable the same as those used on computers of today, or am I mistaken?
[ November 16, 2011, 04:46 PM: Message edited by: Joseph Banfield ]
Posts: 5468
From: Nouméa, New Caledonia
Registered: Jun 2003
posted November 16, 2011 12:41 PM
Just FYI, my small Chinon 330 MV has that two pins for adjustment. So I think the big brother must have the same pins too.
posted November 16, 2011 08:46 PM
Thanks for the info Joseph. This is good info for all projectors. As for the power cord, I know that one cord will not work for all Chinons. The 7800 is a three prong. The 6100 is only a two prong.
Thank you too, Winbert. If the machine wasn't already packed up, I would check again for the pins.
Yes, that's right. I am sending it back.
Not all is lost, however. Right after I finalized the return, I received an offer for another projector. It is a bit higher on the food chain compared to the 7800 and still within my budget. I will find out more information about it soon.
If I do get it, I hope it will be the one that will last as long as my 6100 has.
-------------------- There's a great big beautiful tomorrow just a dream away.