Troubleshooting Homing Sensors Typically, when homing is not working correctly, the homing sensors rarely fail and it is one of these three things: 1. The homing sensor cable has been pinched a. Using the instructions and diagrams below in Removing Homing Sensor Cable to remove the worm block cover of the axis that is not homing and look for a pinched cable.
A light “tap” with the palm of your hand will release the cover. Figure 2: Five worm block cover screws to be removed for Paramount ME II.
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Figure 3: Four worm block cover screws to be removed for Paramount MX/MX+ Figure 4: Four worm block cover screws to be removed for Paramount MYT...
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Figure 5: Removing cover from Paramount ME II (note that the above screw sizes are different and may not look to scale) Figure 6: Removing cover from Paramount MX+.
Figure 7: Removing cover from Paramount MYT Step 2: Unplugging the Sensor Electronics Figure 8 shows the homing sensor cable in the mount. Gently pull the connector straight out, away from the mount to unplug it. Make a note of which side the long tab is on so that the replacement cable can be plugged in the same way.
Figure 8: Declination half of the sensor cable. Unplug homing sensors in both the right ascension and declination axes. Step 3: Removing the Existing Cable For the right ascension axis, feed the homing sensor down through the hole in the right ascension tube then pull the remaining cable out of the mount from the void left by removing the Electronics Box (see Removing the Electronics Box).
Figure 9: Declination axis hole cover with screws. (From left to right Paramount ME II, Paramount MX, Paramount MX+, Paramount MYT) Figure 10: Right ascension rear cover. Removing the Electronics Box Please refer to this document: http://www.bisque.com/sc/media/p/63292.aspx. It also explains the purpose of each cable plugged in to the MSK 5000 board.
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Figure 11 for the Paramount ME II and Paramount MX/MX+. For the Paramount MYT there is only one hole in the RA base used for all cables coming from the electronics box, see Figure 12.
Figure 12: Paramount MYT RA base, cable wiring hole Step 1: Installing the Right Ascension Side of the Homing Sensor Cable The right ascension sensor has four wires colored either white, black, brown and red or brown, red, orange and yellow. The colors don’t matter as much as the placement of the tab. Starting at the Electronics Box, insert the zip tie with this half of the sensor cable attached up through the hole shown in Figure 11 and guide the zip tie up to the hole in the RA tube where you pulled it from originally.
The most critical step in this process is to avoid feeding the sensor cable into any holes in center declination shaft. Figure 13: RA Base, Declination wiring hole (Paramount ME II on left, Paramount MX/MX+ on right). Once you have fed the sensor cable through the motor hole and can plug it in to the homing sensor (long tab from the connector on the right), the worm block cover can be replaced.
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