Textron GREENLE DM-20 Manuel D'instructions page 15

Maintenance
Electric shock hazard:
• Do not attempt to repair this unit. It contains no user-serviceable
parts.
• Do not expose the unit to extremes in temperature or high
humidity. Refer to "Specifications."
Failure to observe these precautions may result in injury and can
damage the unit.
Battery and Fuse Replacement
Electric shock hazard:
• Do not operate with the case open.
• Before opening the case, remove the test leads from the circuit
and shut off the unit.
Failure to observe these warnings could result in severe injury or
death.
Electric shock hazard:
The fuse is an integral part of the overvoltage protection. When
fuse replacement is necessary, refer to "Specifications" for the
correct type, size and capacity. Using any other type of fuse will
void the overvoltage protection rating of the unit.
Failure to observe this warning could result in severe injury or
death.
1. Disconnect the unit from the circuit. Turn the unit OFF.
2. Remove the screws from the back cover. Remove the back cover.
3. Replace the battery (observe polarity) and/or fuse.
4. Replace the cover and screws.
DM-20
15