Informations about YELCO P111-Q or PHOTAX multi-8 or Ifba Quartz

[Pat Grossard]

Hello everybody,
I've just changed the two belts and tried the projector and it works well.
The only small problem is that the image is very dark. So I took apart the optical part and cleaned the lenses.
Then I noticed that there is a small glass window in the middle of a system and it is dirty and cracked vertically.
1) I don't know how to remove it from the system to clean it
2) is it normal that it is cracked?
I'm attaching photos
Thanks for your answers

[Joerg Polzfusz]

Such pieces of glass are normally used to protect the film from the heat produced by the lamp.
The „crack“ looks too straight to me to be not made in the factory - could this be something like an expansion joint?
Unfortunately, I haven’t got a clue about how to replace/clean the glass.

[Steve Klare]

My son has one of these: I gave it to him when he was 12 years old. I borrowed it a few minutes today to try this out.

In Pat's picture "View of Proj_2" , almost exactly in the center of the picture is a sliding control that puts the machine in and out of single-frame mode. When I operate this slider and shine a light through the gate, I can see the heat shield move up and down, into and out of the gate.

[Tom Dennis]

The "crack" on the heat shied is just an expasion device so that the heat shield does not shatter when hot i.e. the unit is in 2 halves. This is quite normal on projectors, because it is before the optical system it does not show on screen, on slide projectors having condenser opotics even a cracked condenser does not normaly show.
I think Steve is on the right track.
Have you tried Van Eck for a book? he lists a reasonable priced download.

[Pat Grossard]

hi everybody
many thanks for your responses.
In fact as U can see on the photos, there is a 8-S8 controler, when it is UP it's Super 8 mode film and when it's down it's 8 mode film. But there is no way to remove this to access the heater screen glass.
So I tried to clean the glass carefully with a cotton swab soaked in water.
I'll try viewing again this afternoon.
I keep U informed ....
Have a good day friends
Pat

[Pat Grossard]

Also I'll contact Van Eck to see if they have a tip to remove the glass shield.
Pat

[Tom Dennis]

Are you removing the heat shield to clean then replace? If so then thats O.K. the purpose of this unit is to protect the film from being burnt from the heat of the lamp, so projection of a film should not be attemted without the heat shield in place.