LiftMaster 41AS050R1M

LiftMaster 41AS050R1M Logic Board Unit
Preliminary Information
Release Year	2000
Leak Risk	Medium
Batteries	None
Mounting Technology	Through Hole, SMD
Capacitor Types	Aluminum Electrolytic
Destructive Entry	No

This device is in the WorkNeeded:General category because it was flagged as missing general information about the device. The information may be incomplete, using default text, or inaccurate and should be verified with external sources if possible. If you can add or correct information on this page, please feel free to edit it and do so.

LiftMaster (Chamberlain) Garage Door Opener logic board.

Known Issues

Remote control does not work (or works intermittently)

Causes

Cracked solder joints on connectors
Failed capacitor on power supply (PSU) board.

Solutions

Reflow connector solder joints
Replace capacitors

Disassembly Notes

Warnings or tips to disassemble the device

Original Parts

Logic Board

14LG626B

Capacitor Specifications and Footprint Information
RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Height	Lead Spacing	Temp	Type	Brand	Series
C1	1	47 µF	10 V	Through-hole	5mm	8mm	3mm	105 °C	Electrolytic	Leaguer	ST1
C2,C4,C6	3	4.7 µF	50 V	Through-hole	6mm	11mm	3mm	85 °C	Electrolytic	Leaguer	RCL
C3,C5	2	22 µF	10 V	Through-hole	5mm	7mm	3mm	105 °C	Electrolytic	Leaguer	ST1

Power Supply (PSU) Board

14LG574V

Capacitor Specifications and Footprint Information
RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Height	Lead Spacing	Temp	Type	Brand	Series
C204	1	330 µF	35 V	Through-hole	10mm	12mm	5.5mm	85 °C	Electrolytic	Leaguer	RS2

Replacement Parts

Basic PCB Name

Capacitors
RefDes	Qty	Compatible Part Number	Order Links
			Digikey

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.

Kits

Digikey BOM: https://www.digikey.com/

References