Appendix D:changing The Lnt Module Battery - Meade ETX Premier Instruction Manual

Side
Alignment
Top
Alignment
screw
screw
Fig. 54: The LNT Module, with
alignment screws and Atomic Time
Update port visible.
Alignment
Top
screw
Spring
Fig. 55: Interior side view of LNT
Module.
Top
screw hole
Cover
Battery
Side
Alignment
screw hole
Fig. 56 Interior top view of
SmartFinder unit.
56
APPENDIX D:CHANGING THE
LNT MODULE BATTERY
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 alignment screw cap/long bolt from the LNT Module. See Fig.
54.
2. Remove the side alignment screw cap/long bolt from the LNT Module. Take note
that there are two springs inside the LNT. One spring sits between the top and
bottom of the unit. The second spring is on the side of the unit that rests
between the bottom and the top sections. One long bolt passes through the top
spring and the other long bolt passes through the side spring. Set the springs
aside as you will need to replace it later in this assembly . 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.
Atomic Time
3. Carefully lift the top section of the unit from the bottom section. Do not remove
Update Port
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 top spring in place and the LNT Module cover.
7. Replace the top bolt and tighten the cap to a firm feel.
Side
8. Hold the side spring in place with your fingers and slide the spring between
Alignment
between the top and bottom sections. The spring should line up with the
screw hole
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.
Alignment
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
• Level the tripod head. See
• 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
• Grasp the telescope by a fork arm and rotate the telescope
• 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.
Spring
OR
Enter the date and time manually using the Date and Time options in the Setup
menu.
the telescope's optical tube up and down.
lining up 0° on the Dec setting circle (16, Fig. 1a) with the Dec pointer
(the small molded triangle under the setting circle).
telescope tube and fork arm assembly.
counterclockwise until it stops.
, page 12. Level the optical tube by
Step #3g