Gday Ross
The early LX200GPS units used an Allegro A44E ( ref my unit piccy ), but my understanding is that this is now superceded.
Many moons ago, on a forum far far away ( that i cant currently refind ), i lifted a post where someone had found an alternative unit
I can't vouch for the details, but it shld be easy to check
What i lifted
Quote:
Hi ,
The Hall chip attached to the Aluminum bracket that is adjustable is the one
that is working. It's the one on the worm gear frame that is not adjustable that
is not working. I used a needle attached to my VOM to check continuity from the
device pins to the 9 pin connector.
All good. I got hold of an engineer at Allegromicro and he said that their
A1104EAU-T is their replacement for this Hall device. (A44E). I also plan to
check the optical encoder in the Motor.
Manny
|
Andrew
PS full schematics for the LX200GPS/ACF are filed in the files section of the LX200GPS Moderated group if you are interested
https://groups.yahoo.com/neo/groups/...%20Schematics/
PPS, its not required that an "exact" match is achieved, just that the unit has a very "repeatable" trip.
The LX200s have an internal "fingerprinting" function that can allow the system to auto reset itself to suit how the sensor trips.