The Trigger Lock-Off Button Is Stuck Or No Longer Blocks The Trigger

The lock-off cannot be pressed to allow the trigger, does not return, or lets the trigger move without a deliberate lock-off action.

• Sawdust or impact damage is jamming the external button
• Lock-off spring, button, or housing guide is broken or displaced
• Trigger or switch housing is cracked or distorted
• Internal switch assembly has failed

1. With the battery removed, the trigger is positively blocked at rest and moves only while the lock-off is deliberately operated.

1. Remove the battery before testing the lock-off, and keep fingers away from the trigger until power is removed.
2. - Inspect the button and surrounding housing for cracks, binding, packed sawdust, or a button that does not return - clean externally with a dry brush or dry
3. With no battery installed, press and release the lock-off several times while confirming that the trigger is blocked at rest and moves only during delibera
4. - If the control remains stuck, broken, or unable to block the trigger, do not reinstall the battery - route the complete saw for authorized switch and housin

This is a preview of the troubleshooting guidance included in the full repair manual.

• FM-07: Fm Dcs578 07

• root cause analysis
• tools needed
• step-by-step repair procedure
• diagrams
• exploded views
• post-repair checks

Public pages show a preview only. Purchase the full manual to download complete repair steps, diagrams, and verification procedures.