Specifications; Troubleshooting Guide - DeWalt DWS780 Instruction Manual

3. Dust build-up can block the worklight and prevent it from accurately indicating the line
of cut.
4. Follow miter saw's instruction manual to remove and install blade.
5. With blade removed from saw, clean pitch and build-up from blade. Pitch and debris can
interfere with the worklight and prevent it from accurately indicating the line of cut.

SPECIFICATIONS

Light source
Worklight
Power Supply
Operating Temperature
Storage Temperature
Environmental
Dust Duct Cleaning
Depending on your cutting environment, saw dust can clog the dust duct and may prevent dust
from flowing away from the cutting area properly. With the saw unplugged and the saw head
raised fully, low pressure air or a large diameter dowel rod can be used to clear the dust out of the
dust duct.
Cleaning
WARNING: Blow dirt and dust out of all air vents with clean, dry air at least once a week.
To minimize the risk of eye injury, always wear ANSI Z87.1 approved eye protection when
performing this procedure.
WARNING: Never use solvents or other harsh chemicals for cleaning the non-metallic parts
of the tool. These chemicals may weaken the plastic materials used in these parts. Use a
cloth dampened only with water and mild soap. Never let any liquid get inside the tool; never
immerse any part of the tool into a liquid.
Repairs
WARNING: To assure product SAFETY and RELIABILITY, repairs, maintenance and
adjustment (including brush inspection and replacement, when applicable) should be
performed by a D WALT factory service center or a D
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use identical replacement parts.
TROUBLE!
Saw will not start
Saw makes unsatisfactory cuts
Blade does not come up to speed
Machine vibrates excessively
Does not make accurate miter cuts
Material pinches blade
Power LED
3.3 V DC
Input: 120–240 V AC; 50/60Hz
Output: 5 V DC; 0.45 A
14°F to 104°F (-10°C to 40°C)
-22°F to 176°F (-30°C to 80°C)
Water resistant
WALT authorized service center. Always
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BE SURE TO FOLLOW SAFETY RULES AND INSTRUCTIONS
WHAT'S WRONG?
Saw not plugged in
Fuse blown or circuit breaker tripped
Cord damaged
Brushes worn out
Dull blade
Blade mounted backwards
Gum or pitch on blade
Incorrect blade for work being done
Extension cord too light or too long
Low house current
Saw not mounted securely to stand or work bench
Stand or bench on uneven floor
Damaged saw blade
Miter scale not adjusted correctly
Blade is not square to fence
Blade is not perpendicular to table
Workpiece moving
Cutting bowed material
Accessories
WARNING: Since accessories, other than those offered by D
with this product, use of such accessories with this tool could be hazardous. To reduce the
risk of injury, only D
Recommended accessories for use with your tool are available at extra cost from your local dealer
or authorized service center.
Optional Accessories
The following accessories, designed for your saw, may be helpful. Use care in selecting and using
accessories.
Extension Work Support: DW7080
Used to support long overhanging workpieces, the work support is user assembled. Your saw
base is designed to accept two work supports, one on each side.
Adjustable Length Stop: DW7051
Requires the use of one Extension Work Support (DW7080). It is used to make repetitive cuts of
the same length from 0 to 42" (107 cm).
Clamp: DW7082
Used for firmly clamping workpiece to the saw fence for precision cutting.
Dust Bag: DW7053
Equipped with a zipper for easy emptying, the dust bag will capture the majority of the sawdust
produced.
Crown Molding Fence: DW7084
Used for precision cutting of crown molding.
Saw Blades
ALWAYS USE 12" (305 mm) SAW BLADES WITH 1" (25.4 mm) ARBOR HOLES. SPEED RATING
MUST BE AT LEAST 4800 RPM. Never use a smaller diameter blade. It will not be guarded
properly. Use crosscut blades only! Do not use blades designed for ripping, combination blades
or blades with hook angles in excess of 7˚.
APPLICATION
Construction Saw Blades (maximum thin kerf with anti-stick rim)
General Purpose
Fine Crosscuts
Woodworking Saw Blades (provide smooth, clean cuts)
Fine crosscuts
Non-ferrous metals
NOTE: For cutting non-ferrous metals, use only saw blades with TCG teeth designed for this purpose.

Troubleshooting Guide

WHAT TO DO
Plug in saw.
Replace fuse or reset circuit breaker.
Have cord replaced by authorized service center.
Have brushes replaced by authorized service center.
Replace blade. Refer to Changing or Installing a New Saw Blade.
Turn blade around. Refer to Changing or Installing a New Saw Blade.
Remove blade and clean with turpentine and coarse steel wool or household oven cleaner.
Change the blade type. Refer to Saw Blades under Accessories.
Replace with adequate size cord. Refer to Additional Saftey Rules for Miter Saws.
Contact your electric company.
Tighten all mounting hardware. Refer to Bench Mounting.
Reposition on flat level surface. Refer to Familiarization.
Replace blade. Refer to Changing or Installing a New Saw Blade.
Check and adjust. Refer to Miter Scale Adjustment under Assembly and Adjustments.
Check and adjust. Refer to Miter Scale Adjustment under Assembly and Adjustments.
Check and adjust fence. Refer to Bevel Square to Table under Assembly and Adjustments.
Clamp workpiece securely to fence or glue 120 grit sandpaper to fence with rubber cement.
Refer to Bowed Material under Special Cuts.
WALT recommended accessories should be used with this product.
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BLADE DESCRIPTIONS
DIAMETER
12" (305 mm)
12" (305 mm)
12" (305 mm)
12" (305 mm)
WALT, have not been tested
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TEETH
40
60
80
96