DeWalt DCD791 Guide D'utilisation page 74

application. The more you squeeze the trigger, the faster the tool will
operate. For maximum tool life, use variable speed only for starting
holes or fasteners.
NOTE: Continuous use in variable speed range is not recommended.
It may damage the switch and should be avoided.
Forward/Reverse Control Button (Fig. 2)
A forward/reverse control button (B) determines the direction of the tool
and also serves as a lock-off button.
To select forward rotation, release the trigger switch and depress the
forward/reverse control button on the right side of the tool.
To select reverse, release the trigger switch and depress the forward/
reverse control button on the left side of the tool.
The center position of the control button locks the tool in the OFF
position. When changing the position of the control button, be sure the
trigger is released.
NOTE: The first time the tool is run after changing the direction of
rotation, you may hear a click on start up. This is normal and does
not indicate a problem.
Worklights (Fig. 2)
CAUTION: Do not stare into worklight. Serious eye injury could
result.
There are three worklights (G) located around the chuck collar (C). The
worklights are activated when the trigger switch is depressed. When
the trigger is released, the worklight will stay illuminated for up to 20
seconds. If the trigger switch remains depressed, the worklights will
remain on.
NOTE: The worklights are for lighting the immediate work surface and
are not intended to be used as a flashlight.
Quick-Release Chuck (Fig. 2, 6, 7)
WARNING: Use only impact accessories. Non-impact accessories
may break and cause a hazardous condition. Inspect accessory prior
to use to ensure that it con tains no cracks.
NOTE: The chuck accepts 1/4" (6.35 mm) hex accessories.
Place the forward/reverse button (B) in the lock-off (center) position or
remove battery pack before changing accessories.
FIG. 6
C
D
To install an accessory, fully insert the accessory. The accessory is
locked into place (Fig. 6).
To remove an accessory, pull the chuck collar (C) away from the
front of the tool. Remove the accessory (Fig. 7).
Mode Selector (Fig. 1, 8)
Your tool is equipped with a mode selector (K) which allows you to
select one of three modes. Select the mode based on the application
and control the speed of the tool using the variable speed trigger
switch (A).
Precision Drive (Fig. 8)
In addition to normal impacting modes, this tool features the Precision
Drive mode which enables greater control in lighter applications to
avoid damage to materials or fasteners. It is ideal for light applications
such as cabinet hinge screws or machine screws. Precision Drive
12
FIG. 7
C
D