Last updated: 22 January 2007
Subject: Adding An LNT Module To Older Scope Sent: Tuesday, January 16, 2007 18:16:41 From: email@example.com (firstname.lastname@example.org) In a pevious post Dick Seymour mentioned that he bought an LNT module from Meade to upgrade his older non-LNT scope. The module came with a long coiled cord to plug into the Aux port. I have a spare LNT module from a beat up ETX90PE and would like to add it to my LX90 classic, but of course it does not have the Aux plug installed.. My LNT module has four wires, red, blue, yellow and green. Can you or Dick tell me which wire/pin combinations I should use when I add the Aux port connector? Thanks, Keith
From: richard seymour (email@example.com) First answer: i haven't a clue. 2nd answer: Meade is renowned for near-random choices and assignments of colors in their hookups. You would be far safer to back-track the other end of the cable (leading to the power panel, or simply with an ohmmeter when it's not powered) to figure out which color went to which pin on the AUX socket. (the cable to the LNT will be paralleled to the AUX sockets). My own coil-cord model has a red/black/yellow/green cable. Now, -normally- i'd assume that "red" was positive. Nope.. it's ground. (see "2nd answer", above). On my LNT's AUX cable, the colors appear to be: Red = 0v ; Black = AuxData ; Yellow = AuxClk ; Green = +12v But i would -not- assume those colors to hold true for yours. The AUX -socket- pinout can be see at: http://jan.eaglecreekobservatory.org/pinouts.html have fun (but use an ohmmeter) --dick
Sent: Saturday, January 20, 2007 07:59:51 From: firstname.lastname@example.org (email@example.com) You were right, I ohmed out the wires and they're different from yours. My LNT wiring scheme is Red= 12v, Yellow= Aux Data, Blue= Aux Clk, and Green= ground. I've rigged it up temporarilly to my LX90 with a bungee cord and it appears to work fine. All I need now is a way to permanantly mount it to the OTA. Thanks, Keith
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