Does anyone know if the LPL c6700 has a cooling fan?
I went into my darkroom today and found that only after several minutes my diffusion enlarger was very very hot.
Immediately I supposed that the cooling fan has failed.
Before I take the thing apart (and risk not being able to put it back together again from lack of experience) I thought I would try and find out whether I am right in assuming that there is a fan in the head.
Anyone know about fixing these enlargers and how available parts are for them if i do indeed need a new fan?
I have a 7700 and it doesn't have a cooling fan, just some fins on the top of the head. I suspect the 6700 would be similar. They do get quite warm, especially when the lamp is on the way out and it starts generating more heat than light.
I have a D6700 (not sure what difference the D/C makes) and this does not have a fan.
In fact, I don't think I have seen any enlarger with a fan. I wouldn't want a source of vibration like that on an enlarger.
Smaller enlargers usually do not have a fan, but large format color diffusion enlargers with powerful halogen lamps usually do. I have a 5x7" enlarger with two 250w lamps. I suspect it would melt if it weren't for the (very noisy) fan.
Nope it does not. It has a black finned heatsink at the top held on by two thumb screws.
Check that the correct lamp is in. Though the contact connector would usually only allow the correct lamp, I have seem some beat up connectors that look almost forced apart at the sockets. A bulb/lamp with the wrong wattage would probably make much more heat.
If I remember it should be a Esj bulb, not 100% so double check it to the manual.
I would not worry with a bit of heat, keep the work area clear and you should be fine. I have never encountered popped negatives from a diffusion enlarger because of a hot lamp.
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It would have to be a well balanced fan not to vibrate the head - or a well braced collumn.
Originally Posted by Trond
Theatre lights of 1Kw work o.k. continuously without fans so I personally wouldn't worry about running 250w intermittently without a fan.