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06-07-2008, 08:40 AM   #1
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need help with my newly aquired slide project

I was given a "Kodak carousel S-AV 2000" slide projector.

unfortunately it came without a manual and I am loathed to go and spend 10 on a photocopied one and am certainly not shelling out 25 on the service manual. if anyone knows where I can get these (without spending a days wages) I'd be grateful.

I do have a little problem with the projector: as it warms up the fan starts to run slower and slower I am afraid it will stop altogether and burn out. does anyone know what the cause may be ? I've looked at the mecanism and looks well greased.

Thanks

06-07-2008, 03:15 PM   #2
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QuoteOriginally posted by simons-photography Quote
...snip. I do have a little problem with the projector: as it warms up the fan starts to run slower and slower I am afraid it will stop altogether and burn out. does anyone know what the cause may be ? I've looked at the mecanism and looks well greased.

Thanks
If the mechanicals seem OK, the problem must be in the electricals. Check (disconnect and reconnect a few times) any connectors between the fan and the power supply for a start. If that doesn't solve the problem, then it's probably in the fan's controller circuitry and you'll need circuit board troubleshooting skills, or to know someone who can test and repair circuitry. Good luck!
06-08-2008, 12:17 AM   #3
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ahem circuitry ? there are about 4 components in the entire thing, I do have a fair bit of electronic knowledge so I'm not too worried about dabling with it (considering making a PWM light dimmer to control the brightness). Its mostly mechanical issues actually.

I have identified the problem after some study of it and opening it up a number of times. the fan spindle is getting soft with the heat as its the centre there is practically no air flow so the heat builds up and softens the plastic. This has already caused the fan to come a bit loose and when hot it slips, I also beleive its slipping and not a slowing motor because the motor is the same one that drives the changing mechanism and this has no problems. I will try and resecure the fan to the motor spindle and use foil to make a heat sheild to help stop heat getting to the spindle and dissipate it. as its 30 years old i doubt I'll get parts for it and in any case to change the fan the whole mecanism has to come out and I'm not too comfortable with that.

it looks like it can be sorted now I know the cause and i want to try using say a 150-200 W bulb instead of the 250 W one or make a dimmer circuit that will not alter the projector itself as I want to keep it in its original state
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