3840 Manual
Page 2
... erase all codes 34 3-Button remotes 34 To add, reprogram or change a Keyless Entry PIN 35 Repair Parts 36-37 Rail assembly parts 36 Installation parts 36 Motor unit assembly parts 37 Accessories 38 Notes 39 Repair Parts and Service 40 Warranty 40 INTRODUCTION Safety Symbol and Signal Word Review This garage door opener has...
... erase all codes 34 3-Button remotes 34 To add, reprogram or change a Keyless Entry PIN 35 Repair Parts 36-37 Rail assembly parts 36 Installation parts 36 Motor unit assembly parts 37 Accessories 38 Notes 39 Repair Parts and Service 40 Warranty 40 INTRODUCTION Safety Symbol and Signal Word Review This garage door opener has...
3840 Manual
Page 5
Parts may be stuck in two cartons which anything is also listed below . If is missing, carefully check the packing material. LOCK LIGHT Smart Control Panel...-Threading Screw 1/4"-14x5/8" (2) Insulated Staples (10) Ring Fastener (3) Drywall Anchors (2) Carriage Bolt 1/4"-20x1/2" (2) Wing Nut 1/4"-20 (2) Spacers (2) Rope Handle 5 contain the motor unit and all parts illustrated below . Hardware for installation Accessories will depend on the model purchased. Carton Inventory Your garage door opener is packaged in the foam.
Parts may be stuck in two cartons which anything is also listed below . If is missing, carefully check the packing material. LOCK LIGHT Smart Control Panel...-Threading Screw 1/4"-14x5/8" (2) Insulated Staples (10) Ring Fastener (3) Drywall Anchors (2) Carriage Bolt 1/4"-20x1/2" (2) Wing Nut 1/4"-20 (2) Spacers (2) Rope Handle 5 contain the motor unit and all parts illustrated below . Hardware for installation Accessories will depend on the model purchased. Carton Inventory Your garage door opener is packaged in the foam.
3840 Manual
Page 7
... contact with a 1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on inside of the door. 10. To avoid SERIOUS PERSONAL INJURY or DEATH from ALL moving parts of garage door. 12.
... contact with a 1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on inside of the door. 10. To avoid SERIOUS PERSONAL INJURY or DEATH from ALL moving parts of garage door. 12.
3840 Manual
Page 11
... safety reversing sensor. Extension brackets (see accessories) are designed to a solid surface such as the sun never shines directly into the receiving eye lens. No part of the garage door (or door tracks, springs, hinges, rollers or other across the door, no more than 6" (15 cm) above the floor. The mounting...
... safety reversing sensor. Extension brackets (see accessories) are designed to a solid surface such as the sun never shines directly into the receiving eye lens. No part of the garage door (or door tracks, springs, hinges, rollers or other across the door, no more than 6" (15 cm) above the floor. The mounting...
3840 Manual
Page 16
...connected BEFORE installing door control. • Connect ONLY to operate the same garage door To prevent possible SERIOUS INJURY or DEATH from ALL moving parts of door and door hardware. Strip 7/16" HARDWARE SHOWN ACTUAL SIZE (11 mm) of insulation from one Smart Control Panel® can ...screw head and slide To Replace Insert Top Tabs First down to avoid cracking plastic housing. To prevent possible SERIOUS INJURY or DEATH from moving parts of door. • NEVER permit children to operate or play with door control push buttons or remote control transmitters. • Activate door...
...connected BEFORE installing door control. • Connect ONLY to operate the same garage door To prevent possible SERIOUS INJURY or DEATH from ALL moving parts of door and door hardware. Strip 7/16" HARDWARE SHOWN ACTUAL SIZE (11 mm) of insulation from one Smart Control Panel® can ...screw head and slide To Replace Insert Top Tabs First down to avoid cracking plastic housing. To prevent possible SERIOUS INJURY or DEATH from moving parts of door. • NEVER permit children to operate or play with door control push buttons or remote control transmitters. • Activate door...
3840 Manual
Page 18
...; Remove the power cord from electrocution or fire: • Be sure power is required by your garage door opener has a grounding type plug with moving parts. • Reinstall the cover.
...; Remove the power cord from electrocution or fire: • Be sure power is required by your garage door opener has a grounding type plug with moving parts. • Reinstall the cover.
3840 Manual
Page 29
... PROBLEM SOLUTION Reduced proximity sensing (does not activate by pressing the remote push button. Tested to control the light. 2. THERE ARE NO OTHER USER SERVICEABLE PARTS. After the opener lights flash, release all buttons. Dispose of old batteries properly. This remote control is swallowed, immediately notify doctor. To replace the batteries...
... PROBLEM SOLUTION Reduced proximity sensing (does not activate by pressing the remote push button. Tested to control the light. 2. THERE ARE NO OTHER USER SERVICEABLE PARTS. After the opener lights flash, release all buttons. Dispose of old batteries properly. This remote control is swallowed, immediately notify doctor. To replace the batteries...
3840 Manual
Page 30
... LED. A fully charged battery supplies 12 Vdc to persons: • Disconnect ALL electric and battery power BEFORE performing ANY service or maintenance. • Use ONLY LiftMaster part # 485LM for replacement battery. • DO NOT dispose of the battery. • A flashing LED with beep indicates the opener is operating on battery power and...
... LED. A fully charged battery supplies 12 Vdc to persons: • Disconnect ALL electric and battery power BEFORE performing ANY service or maintenance. • Use ONLY LiftMaster part # 485LM for replacement battery. • DO NOT dispose of the battery. • A flashing LED with beep indicates the opener is operating on battery power and...
3840 Manual
Page 36
... rail 8 feet (2.4 m) 5 41A4836 Drive sprocket kit 6 25C20 Coupling 7 41A6312 Rail End Bracket NOT SHOWN 28A143 Wire Clips LOCK LIGHT 13 KEY PART NO. NO. REPAIR PARTS Rail Assembly Parts 5 3 6 1 7 4 Installation Parts 5 42 KEY PART NO. NO. 1 398LM DESCRIPTION Smart Control Panel® 2 373P 3-Button remote control 3 10A19 3V2016 Lithium battery: LED and opener 7 6 4 10A33 8 5 29C151...
... rail 8 feet (2.4 m) 5 41A4836 Drive sprocket kit 6 25C20 Coupling 7 41A6312 Rail End Bracket NOT SHOWN 28A143 Wire Clips LOCK LIGHT 13 KEY PART NO. NO. REPAIR PARTS Rail Assembly Parts 5 3 6 1 7 4 Installation Parts 5 42 KEY PART NO. NO. 1 398LM DESCRIPTION Smart Control Panel® 2 373P 3-Button remote control 3 10A19 3V2016 Lithium battery: LED and opener 7 6 4 10A33 8 5 29C151...
3840 Manual
Page 37
Motor Unit Assembly Parts 1 9 2 8 7 13 14 10 5 4 12 6 3 11 KEY NO. 1 2 3 4 5 6 7 8 PART NO. 41C588 41B135 41B6701 41A6790 41A6538 41C6551 41B0024 41DS002-2 DESCRIPTION Drive shaft cover Line cord Filter Wire harness kit Motor with position sensor Positioning sensor Drive belt Logic board KEY NO. 9 10 11 12 13 14 PART NO. 41A6231 41C213 31D504-20 41C22-1 108D79 175B88 485LM 41DS002-2-390 DESCRIPTION End panel Transformer and Harness Cover Drive coupling hub Light lens Light socket NOT SHOWN Battery kit Alternate frequency board 37
Motor Unit Assembly Parts 1 9 2 8 7 13 14 10 5 4 12 6 3 11 KEY NO. 1 2 3 4 5 6 7 8 PART NO. 41C588 41B135 41B6701 41A6790 41A6538 41C6551 41B0024 41DS002-2 DESCRIPTION Drive shaft cover Line cord Filter Wire harness kit Motor with position sensor Positioning sensor Drive belt Logic board KEY NO. 9 10 11 12 13 14 PART NO. 41A6231 41C213 31D504-20 41C22-1 108D79 175B88 485LM 41DS002-2-390 DESCRIPTION End panel Transformer and Harness Cover Drive coupling hub Light lens Light socket NOT SHOWN Battery kit Alternate frequency board 37
3840 Manual
Page 40
... the Yellow Pages, or call our Service number for warranty repair. The proper operation of dealers in your local LIFTMASTER/CHAMBERLAIN dealer. WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE FOLLOWING INFORMATION: • PART NUMBER • PART NAME • MODEL NUMBER ADDRESS ORDERS TO: THE CHAMBERLAIN GROUP, INC. Please include a brief description of the problem...
... the Yellow Pages, or call our Service number for warranty repair. The proper operation of dealers in your local LIFTMASTER/CHAMBERLAIN dealer. WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE FOLLOWING INFORMATION: • PART NUMBER • PART NAME • MODEL NUMBER ADDRESS ORDERS TO: THE CHAMBERLAIN GROUP, INC. Please include a brief description of the problem...