BLACK+DECKER LCS1020 Repair Manual

Comprehensive repair guide for the BLACK+DECKER LCS1020 cordless chainsaw, including troubleshooting, maintenance, and repair instructions for 24 common faults.

$39.99

Last updated Aug 1, 2026, 1:13 AM

About this manual

Comprehensive repair guide for the BLACK+DECKER LCS1020 cordless chainsaw, including troubleshooting, maintenance, and repair instructions for 24 common faults.

0% Reported Successful Repair

Price

$39.99

Full Manual Includes

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

Table of contents preview

Black+decker Lcs1020
The Six Things That Matter Most
What This Model Actually Has
Indicator And Signal Map
Model-revision Warning
The Cutting Path
Normal Use Sequence
Normal Behavior That Can Look Like A Fault
What This Model Does Not Have
The Saw
Unusable
FM-08 CHAIN IS LOOSE, SAGS, OR WILL NOT HOLD TENSION
FM-20 ABNORMAL GRINDING, RATTLING, OR SEVERE VIBRATION
FM-09 CHAIN IS TOO TIGHT, BINDS BY HAND, OR BAR AND CHAIN OVERHEAT
FM-21 GUIDE BAR, SAW CHAIN, SCABBARD, OR CUTTING ATTACHMENT IS

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Supported model

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BLACK+DECKER

Dcs578

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BLACK+DECKER

Dcs575

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BLACK+DECKER

Dcw210

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BLACK+DECKER

Dcb115

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BLACK+DECKER

Cmcs500m1

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BLACK+DECKER

Cmcf800c1

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BLACK+DECKER

Cmcd700c1

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BLACK+DECKER

Gsr18v 190b22

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BLACK+DECKER

Gks18v 25 Gks18v 25n

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BLACK+DECKER

Bat414

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BLACK+DECKER

Gdx18v 1800

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BLACK+DECKER

Gba18v40

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The battery will not slide fully into the tool, click into place, stay latched, or release normally.

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The chain travels around the bar but only rubs the wood, produces almost no chips, and will not enter the cut.

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The saw chain leaves the guide-bar groove, hangs from the bar, or comes off the drive sprocket.

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Bar oil forms a fresh puddle, runs from the cap, or appears from the body while the saw is idle or stored.

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The cap will not close, the primer is split or stuck, or the oil-level indicator is cracked, clouded, or leaking.

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The saw cuts slowly, makes fine dust instead of chips, chatters in the kerf, or must be pushed hard despite judging sharpness.

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The lock-off or trigger will not move freely, does not return, responds intermittently, or the motor continues after the trigger is released.

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The reservoir contains oil but the chain stays dry, the primer gives no visible result, or the bar oil path remains dry.

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Saw dead with charged pack

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The saw makes new grinding, clacking, rattling, or strong vibration during no-load running or cutting.

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After chain or bar work, the cover will not sit flush, the bar will not align, or the locking knob cannot begin correctly.

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The bar is bent or cracked, chain links or cutters are broken, or the guide-bar scabbard is split, missing, or will not stay on.

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Motor runs, chain does not

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The guide bar steers sideways in the cut or the kerf curves even though the workpiece is supported and the saw is held square.

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Chain moves but does not cut

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The guide bar cannot be withdrawn from the kerf, the chain is trapped, or the workpiece closes on the saw.

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The lithium battery or charger shows abnormal heat, swelling, cracking, electrolyte, hissing, odor, sparks, or smoke.

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The chain hangs below the guide bar, can be pulled too far from the rail, or becomes loose again after adjustment.

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Liquid entered the tool, the housing emits smoke or sparks, plastic melts, a burning odor appears, or wiring or contacts are exposed.

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The chain is hard to pull around the bar, the bar becomes unusually hot, or smoke appears without an electrical odor.

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The front hand guard, front or rear handle, main housing, ribbed bumper, fastener, battery well, or another external part is cracked, loose, or missing.

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A tool-free knob is frozen, cross-threaded, spins without effect, will not clamp the bar, or cannot hold the set tension.

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The motor can be heard, but the chain remains stationary or only twitches while the trigger is held.

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FM-01: FM-01 BATTERY PACK WILL NOT INSERT, LATCH, OR RELEASE

Summary

Battery pack will not insert, latch, or release properly, preventing tool operation.

Full repair guide includes

Root Cause Analysis
Required Tools
Replacement Parts
Step-by-step Repair Procedure
Safety Precautions
Verification Checklist

BLACK+DECKER LCS1020 Repair Manual

Manual information

About this manual

Full Manual Includes

Table of contents preview

Supported model

Related Models

Common Symptoms

Failure Modes

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