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charging procedure. You may also charge a partially used pack 
whenever you desire with no adverse affect on the battery pack.

  5. Under certain conditions, with the charger plugged into the power 

supply, the exposed charging contacts inside the charger can 
be shorted by foreign material. Foreign materials of a conductive 
nature such as, but not limited to, grinding dust, metal chips, steel 
wool, aluminum foil, or any buildup of metallic particles should 
be kept away from charger cavities. Always unplug the charger 
from the power supply when there is no battery pack in the cavity. 
Unplug charger before attempting to clean.

  6. Do not freeze or immerse charger in water or any other liquid.

 WARNING: 

Shock hazard. Don’t allow any liquid to get inside 

charger. Electric shock may result. 

WARNING:

 Burn hazard. Never attempt to open the battery pack 

for any reason. If the plastic housing of the battery pack breaks or 
cracks, return to a service center for recycling.

Storage Recommendations

  1. The best storage place is one that is cool and dry away from direct 

sunlight and excess heat or cold.

 2. For long storage, it is recommended to store a fully charged 

battery pack in a cool dry place out of the charger for optimal 
results.

NOTE:

 Battery packs should not be stored completely depleted of 

charge. The battery pack will need to be recharged before use.

SAVE THESE INSTRUCTIONS 

FOR FUTURE USE

OPERATION 

 WARNING:  To  reduce the risk of serious personal injury, 

turn tool off and remove the battery pack before making any 
adjustments or removing/installing attachments or accessories. 

An accidental start-up can cause injury.

FIG. 2

M

    

A

B

FIG. 3

Installing and Removing the Battery Pack 
(Fig. 2, 3)

WARNING: 

Make certain the switch lock-off button (A) is engaged 

to prevent switch actuation before removing or installing battery.

NOTE:

 For best results, make sure your battery pack is fully charged. 

To install the battery pack into the tool handle, align the notch inside 
the tool’s handle with the battery pack and slide the battery pack firmly 
into the handle until you hear the lock snap into place as shown in 
Figure 2. 
To remove the battery pack from the tool, press the release buttons (M) 
and firmly pull the battery pack out of the tool handle. Insert it into the 
charger as described in the charger section of this manual.

Summary of Contents for DC390B

Page 1: ...door use Use of a cord suitable for outdoor use reduces the risk of electric shock f If operating a power tool in a damp location is unavoidable use a ground fault circuit interrupter GFCI protected supply Use of a GFCI reduces the risk of electric shock Definitions Safety Guidelines The definitions below describe the level of severity for each signal word Please read the manual and pay attention t...

Page 2: ...your application The correct power tool will do the job better and safer at the rate for which it was designed b Do not use the power tool if the switch does not turn it on and off Any power tool that cannot be controlled with the switch is dangerous and must be repaired c Disconnect the plug from the power source and or the battery pack from the power tool before making any adjustments changing a...

Page 3: ...may contact hidden wiring or its own cord Contact with a live wire will also make exposed metal parts of the power tool live and shock the operator f When ripping always use a rip fence or straight edge guide This improves the accuracy of cut and reduces the chance of blade binding g Always use blades with correct size and shape diamond versus round of arbor holes Blades that do not match the moun...

Page 4: ...s binding or when interrupting a cut for any reason release the trigger and hold the saw motionless in the material until the blade comes to a complete stop Never attempt to remove the saw from the work or pull the saw backward while the blade is in motion or kickback may occur Investigate and take corrective actions to eliminate the cause of blade binding c When restarting a saw in the workpiece ...

Page 5: ...ption of harmful chemicals WARNING Use of this tool can generate and or disperse dust which may cause serious and permanent respiratory or other injury Always use NIOSH OSHA approved respiratory protection appropriate for the dust exposure Direct particles away from face and body WARNING Always wear proper personal hearing protection that conforms to ANSI S12 6 S3 19 during use Under some conditio...

Page 6: ... Do not store or carry battery so that metal objects can contact exposed battery terminals For example do not place battery in aprons pockets tool boxes product kit boxes drawers etc with loose nails screws keys etc without battery cap Transporting batteries can possibly cause fires if the battery terminals inadvertently come in contact with conductive materials such as keys coins hand tools and t...

Page 7: ... off the spent battery RBRC is a registered trademark of the Rechargeable Battery Recycling Corporation Important Safety Instructions for All Battery Chargers SAVE THESE INSTRUCTIONS This manual contains important safety and operating instructions for battery chargers Before using charger read all instructions and cautionary markings on charger battery pack and product using battery pack DANGER El...

Page 8: ...If in doubt use the next heavier gauge The smaller the gauge number the heavier the cord Minimum Gauge for Cord Sets Ampere Rating Volts Total Length of Cord in Feet meters 120 V 25 7 6 50 15 2 100 30 5 150 45 7 240 V 50 15 2 100 30 5 200 61 0 300 91 4 More Than Not More Than AWG 0 6 18 16 16 14 6 10 18 16 14 12 10 12 16 16 14 12 12 16 14 12 Not Recommended Do not place any object on top of charge...

Page 9: ... allowing it to function at peak capacity Battery packs should be tuned up weekly or after 10 charge discharge cycles or whenever the pack no longer delivers the same amount of work To use the automatic Tune Up place the battery pack in the charger and leave it for at least 8 hours The charger will cycle through the following modes 1 The red light will blink continuously indicating that the 1 hour...

Page 10: ... NOTE A battery pack will slowly lose its charge when kept out of the charger If the battery pack has not been kept on maintenance charge it may need to be recharged before use A battery pack may also slowly lose its charge if left in a charger that is not plugged into an appropriate AC source WEAK BATTERY PACKS Chargers can also detect a weak battery pack Such batteries are still usable but shoul...

Page 11: ...rect sunlight and excess heat or cold 2 For long storage it is recommended to store a fully charged battery pack in a cool dry place out of the charger for optimal results NOTE Battery packs should not be stored completely depleted of charge The battery pack will need to be recharged before use SAVE THESE INSTRUCTIONS FOR FUTURE USE OPERATION WARNING To reduce the risk of serious personal injury t...

Page 12: ...ower blade guard Do not assume that the printing on the blade will always be facing you when properly installed When retracting the lower blade guard to install the blade check the condition and operation of the lower blade guard to assure that it is working properly Make sure it moves freely and does not touch the blade or any other part in all angles and depths of cut 3 Place outer clamp washer ...

Page 13: ...lamping screw H and outer clamp washer O only Remove old blade 3 Clean any sawdust that may have accumulated in the guard or clamp washer area and check the condition and operation of the lower blade guard as previously outlined Do not lubricate this area 4 Select the proper blade for the application see Blades Always use blades that are the correct size diameter with the proper size and shape cen...

Page 14: ...ould increase the possibility of kickback Please refer to the table on next page to determine the correct size replacement blade for your model saw Blade Diameter Teeth Application DW9155 6 1 2 18 General Purpose Cutting DW9154 6 1 2 24 Smooth Wood Cutting DW9153 6 1 2 90 Non carbide Plywood Vinyl Siding Cutting If you need assistance regarding blades please call 1 800 4 DEWALT 1 800 433 9258 KICK...

Page 15: ...LL OR DIRTY BLADES Dull blades cause increased loading of the saw To compensate an operator will usually push harder which further loads the unit and promotes twisting of the blade in the kerf Worn blades may also have insufficient body clearance which increases the chance of binding and increased loading 6 LIFTING THE SAW WHEN MAKING BEVEL CUT Bevel cuts require special operator attention to prop...

Page 16: ...NEEDED 1 Adjust the saw to 0 bevel 2 Retract blade guard Place the saw on blade side 3 Loosen bevel adjustment knob Place a square against the blade and shoe to adjust the 90 setting 4 Move the adjustment screw so that the shoe will stop at the proper angle 5 Confirm the accuracy of the setting by checking the squareness of an actual cut on a scrap piece of material Kerf Indicator The front of the...

Page 17: ...the saw When this happens push the saw more slowly but hard enough to keep working without much decrease in speed Forcing the saw can cause rough cuts inaccuracy kickback and over heating of the blade tips and or the motor Should your cut begin to go off the line don t try to force it back on Release the switch and allow blade to come to a complete stop Then you can withdraw the saw sight anew and...

Page 18: ...ting surface before starting saw 6 Start the motor and gradually lower the saw until its shoe rests flat on the material to be cut Advance saw along the cutting line until cut is completed 7 Release trigger and allow blade to stop completely before withdrawing the blade from the material 8 When starting each new cut repeat as above MAINTENANCE WARNING To reduce the risk of serious personal injury ...

Page 19: ... WARRANTY SERVICE Registering your product will help you obtain more efficient warranty service in case there is a problem with your product CONFIRMATION OF OWNERSHIP In case of an insurance loss such as fire flood or theft your registration of ownership will serve as your proof of purchase FOR YOUR SAFETY Registering your product will allow us to contact you in the unlikely event a safety notific...

Page 20: ...ower Tool Laser or Nailer for any reason you can return it within 90 days from the date of purchase with a receipt for a full refund no questions asked LATIN AMERICA This warranty does not apply to products sold in Latin America For products sold in Latin America see country specific warranty information contained in the packaging call the local company or see website for warranty information FREE...

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