DeWalt DCS781 - Troubleshooting Common Issues; Saw Start, Cut Quality, and Vibration; Accuracy, Worklight, and Blade Issues

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ENGLISH
Lubrication
Your power tool requires no additionallubrication.
Cleaning
Before use, carefully check the upper blade guard, movable lower blade guard as well as
the dust extraction tube to determine that it will operate properly. Ensure that chips, dust or
workpiece particle cannot lead to blockage of one of thefunctions.
In case of workpiece fragments jammed between saw blade and guards disconnect the
machine from the power supply and follow the instructions given in section Changing or
Installing a New Saw Blade. Remove the jammed parts and reassembling the sawblade.

WARNING: Blow dirt and dust out of the main housing with dry air as often as dirt is seen
collecting in and around the air vents. Wear approved eye protection and approved dust
mask 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 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.

WARNING: To reduce the risk of injury, regularly clean the tabletop.

WARNING: To reduce the risk of injury, regularly clean the dust collectionsystem.
Worklight Cleaning
For the best worklight performance, perform the following maintenanceregularly.
1. Carefully clean sawdust and debris from worklight lens with a cotton swab.
2. DO NOT use solvents of any kind, they may damage the lens.
3. Dust build‑up can block the worklight and prevent it from accurately indicating the line
ofcut.
4. Follow mitre 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.
Troubleshooting Guide
BE SURE TO FOLLOW SAFETY RULES AND INSTRUCTIONS
TROUBLE! WHAT’S WRONG? WHAT TO DO
Saw will not start Battery not installed Install battery. Refer to Installing and Removing BatteryPack.
Battery not charged Charge battery. Refer to ChargingProcedure.
Saw overheated Wait several minutes for saw tocool.
Batteries overheated Wait several minutes for batteries tocool.
Saw makes unsatisfactory cuts Dull blade Replace blade. Refer to Changing or Installing a New Saw Blade.
Blade mounted backwards Turn blade around. Refer to Changing or Installing a New Saw Blade.
Gum or pitch on blade Remove blade and clean with coarse steel wool and turpentine or household
ovencleaner.
Incorrect blade for work being done Change the blade type. Refer to Saw Blades under Optional Accessories.
CUTLINE worklight is flashing Battery not charged Charge battery. Refer to ChargingProcedure.
Machine vibrates excessively Saw not mounted securely to stand or
work bench
Tighten all mounting hardware. Refer to Bench Mounting.
Stand or bench on uneven floor Reposition on flat level surface. Refer to Familiarization.
Damaged saw blade Replace blade. Refer to Changing or Installing a New Saw Blade.
Does not make accurate mitre cuts Mitre scale not adjusted correctly Check and adjust. Refer to Mitre Scale Adjustment under Assembly and
Adjustments.
Blade is not square to fence Check and adjust. Refer to Mitre Scale Adjustment under Assembly and
Adjustments.
Blade is not perpendicular to table Check and adjust fence. Refer to Bevel Square to Table Adjustment under
Assembly and Adjustments.
Workpiece moving Clamp workpiece securely to fence or glue 120grit sandpaper to fence with
rubbercement.
Kerf plate worn or damaged Take to authorized servicecenter.
Mitre pointer not adjusted correctly Check and adjust. Refer to Mitre Pointer Adjustment under Assembly
andAdjustments.
Material pinches blade Cutting bowed material Refer to Bowed Material under Special Cuts.
Optional Accessories

WARNING: Since accessories, other than those offered by DeWALT, have not been tested
with this product, use of such accessories with this tool could be hazardous. To reduce the
risk of injury, only DeWALT, recommended accessories should be used with thisproduct.
SAW BLADES: ALWAYS USE 305 mm SAW BLADES WITH 25.4 mm ARBOUR 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°.
BLADE DESCRIPTIONS
APPLICATION DIAMETER TEETH
Construction Saw Blades (thin kerf with anti‑stick rim)
General Purpose 305 mm 40
Fine Crosscuts 305 mm 60
Woodworking Saw Blades (provide smooth, clean cuts)
Fine crosscuts 305 mm 80
Non‑ferrous metals 305 mm 96
Consult your dealer for further information on the appropriateaccessories.
Protecting the Environment
Separate collection. Products and batteries marked with this symbol must not be
disposed of with normal householdwaste.
Products and batteries contain materials that can be recovered or recycled reducing
the demand for raw materials. Please recycle electrical products and batteries
according to local provisions. Further information is available at www.2helpU.com.
Rechargeable Battery Pack
This long life battery pack must be recharged when it fails to produce sufficient power on jobs
which were easily done before. At the end of its technical life, discard it with due care for our
environment:
• Run the battery pack down completely, then remove it from thetool.
• Li‑Ion cells are recyclable. Take them to your dealer or a local recycling station. The
collected battery packs will be recycled or disposed ofproperly.