CNI OEM PSU Settings?

[dnar]

Tonight after replacing a failed LOC, and lining up my main RGB projector, I noticed my 300mW CNI MGL-III-532 module was producing a TEM10 beam...

It's been good for 12 months, now it's TEM10 all of a sudden after 10 minutes of running. The module feels cool to the touch.

Does anyone know what each trim-pot on the OEM PSU controls? I am feeling I have nothing to loose by tweaking the TEC control loop (or reducing the IR LD drive) to see if I can get this back to TEM00.

Thanks guys.

[StarryEyed]

Hey,

Hey

VR1:Crystal Tec
VR2iode Tec
VR3:Threshold
VR4:Gain

Don´t kill me if i´m wrong..but i think this should be it.

[dnar]

Thanks Man, I'll give it a go, I feel the Crystal TEC needs a tweak. Stay tuned.

[dnar]

Thanks Man, I'll give it a go, I feel the Crystal TEC needs a tweak. Stay tuned.

You have to be close, VR3 is absent on TTL units, so this makes sense at least.

[LaNeK779]

once upon a time, not too long ago, this little greenie was in my possesion.

it had the markings you can see in the pic on it and i believe them to be accurate.
I do believe that ld is... well the LD and xl is the crystal tec

[dnar]

Great, that agrees with what StarryEyed said!

Will have a tweak tonight. Thanks!

[dnar]

Sweet, this helped a lot!

Although not a perfect TEM00 beam, the "peanut" is now much smaller after turning VR1 (Crystal TEC) clockwise 3 full turns. I didn't have the nerve to go any further!

Beam profile is now acceptable. I think I need to go for a good 640nM module and upgrade the 532nM module to at least 500mW (from 300mW).

[dave]

The green would still be in warranty? Even if it isn't and you can get away with the downtime, CNI tend to be great at repairing at a minimal cost..

[dnar]

Even if it isn't and you can get away with the downtime, CNI tend to be great at repairing at a minimal cost..

There is the crunch. I have a minimum of 2 regular shows booked each month. In April I have 4 shows (one of them in a cave!!!). I can't afford the down time. I might just buy a 500mW Green and sell this one off.