Meade Instruments ETX Premier Edition - Manual (Page 56)

APPENDIX D:CHANGING THE
LNT MODULE BATTERY
56
The LNT Module uses a lithium coin CR2023 battery that will last about 5 years and
is installed with the original LNT Module assembly. After you replace the battery, you
will need to recalibrate the telescope’s sensors and reset the time and date. You will
need a new battery. Also, you may use Meade’s optional Atomic Time Update
Module, although this is not necessary.
To replace the battery:
1. Remove the top adjustment screw cap/long bolt from the LNT Module.
See Fig. 54.
2. Remove the side adjustment screw cap/long bolt from the LNT Module. Take
note that there are two springs inside the LNT. One spring is on the bottom of
the unit. The second spring is on the side of the unit. One long bolt passes
through the side spring and the other long bolt passes through the bottom
spring. Set the springs aside as you will need to replace it later in this assem-
bly. See Fig. 55 and 56.
Important Note: Note there is some wiring inside the LNT Module. Be careful
not to pull on the wiring. If it is necessary to move the wiring aside, do so
carefully.
3. Carefully lift the top section of the unit from the bottom section. Do not remove
the bottom section or disassemble the rest of the unit.
4. Remove the old battery. Note the spring.
5. Insert the new (user-supplied) battery. Take care to orient the battery so that the
side with the battery markings is facing the top.
6. Replace the bottom spring in place and the LNT Module cover.
7. Replace the bottom bolt and tighten the cap to a firm feel.
8. Hold the side spring in place with your fingers and slide the spring between
between the top and bottom sections. The spring should line up with the
mounting holes for the side long bolt. Slide the long bolt through the side hole,
then through the spring and finally through the bottom of the LNT Module and
tighten to a firm feel.
9. Next you will need to recalibrate the LNT Module sensors. Select Calibrate
Sensors from the Setup: Telescope menu. A scrolling message displays.
10. The message prompts you to place the telescope in the home position:
• Loosen the telescope’s vertical lock (6, Fig. 1B ). This will allow you to move
the telescope’s optical tube up and down.
• Level the tripod head. See Step #3g , page 12. Level the optical tube by
lining up 0° on the Dec setting circle (16, Fig. 1a) with the Dec pointer
(the small molded triangle under the setting circle).
• Retighten the vertical lock (6, Fig. 1b) to a firm feel only.
• Unlock the horizontal lock (9, Fig. 1a ). This will allow you to rotate the
telescope tube and fork arm assembly.
• Grasp the telescope by a fork arm and rotate the telescope
counterclockwise until it stops.
• Re-lock the Horizontal lock (9, Fig. 1).
11. Press ENTER. The telescope will automatically find North, detect level and the tilt
of you telescope, and calibrate the sensors.
12. Next, follow the instructions included with the Atomic Time Update Module
optional accessory to reset the clock.
OR
Enter the date and time manually using the Date and Time options in the Setup
menu.
bottom Adjustment
screw hole
Spring
Spring
Battery
Side
Adjustment
screw hole
Side
Adjustment
screw hole
Cover
Bottom Adjustment
screw
Adjustment screws
Atomic Time
Update Port
Fig. 54: The LNT Module, with
adjustment screws and Atomic Time
Update port visible.
Fig. 55: Interior side view of
LNT module.
Fig. 56 Interior top view of
SmartFinder unit.
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