voltage at the camera drops to 10.25V or less. At 10.25V or less, the camera will automatically
shut down the TE cooling but otherwise continue to operate normally. The final red LED labeled
9V will light if the input voltage at the camera drops to 9.25V or less. At this point the camera's
operation may be unreliable and you should shut it down until the voltage can be brought back up
to the normal operating range.
1.13. Opening the Back Cover - Changing the Fuse
STXL cameras have a built-in voltage regulation that lets you run the camera directly from any
unregulated 12VDC source such as car battery. The input to this supply is protected with a fuse
located inside the rear of the camera. To access the fuse, place the camera face down on a
smooth clean surface. To help avoid any static damage, touch something metal that is grounded
before opening the camera. Open the back cover plate of the camera by removing the eight
socket head screws located around the perimeter of the back plate. Carefully lift the rear cover
and turn it over. You will see a wiring harness for the fan that prevents the cover from being
completely detached, but the wires should be long enough that the cover can be placed out of the
way without unplugging the harness. The fuse is located on the digital board as shown in the
right hand photo above. .
1.14. Using a Relay Adapter Box with the STXL
STXL cameras use opto-isolated relays that isolate the
camera, electrically, from your mount’s drive
electronics. It is therefore unlikely that a Relay Adapter
box will be needed with any commercial mount.
However if you wish to use the Relay Box with
mechanical relays for other reasons, then jumpers must
be set inside the camera to provide 12V out on one pin
of the SCOPE port. This is needed to supply power to
the Relay Adapter Box before it can be used with the
camera. To set the jumpers, remove the back cover of
the camera as instructed in the previous section for changing the fuse. Unlike the fuse, however,
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