LiftMaster 41AS050R1M: Difference between revisions

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|[http://www.headcon.cn/upload/2021-05/28/ST1xiliechanpinmulushu.pdf ST1]
|[http://www.headcon.cn/upload/2021-05/28/ST1xiliechanpinmulushu.pdf ST1]
|}
|}
{| class="wikitable"
|+Active Components
!RefDes
!Qty
!Part Number/Model Number
!Manufacturer (if applicable)
!Explanation
!Datasheet
|-
|U1
|1
|L7805CV
|STMicroelectronics
|Positive Voltage Regulator
|[https://www.st.com/content/ccc/resource/technical/document/datasheet/41/4f/b3/b0/12/d4/47/88/CD00000444.pdf/files/CD00000444.pdf/jcr:content/translations/en.CD00000444.pdf L78]
|-
|U2
|1
|LM2902N
|STMicroelectronics
|Quad Op-Amp
|[https://www.ti.com/lit/ds/symlink/lm224.pdf?HQS=dis-dk-null-digikeymode-dsf-pf-null-wwe&ts=1739945162772 LM2902x]
|}
===Power Supply (PSU) Board===
===Power Supply (PSU) Board===
14LG574V
14LG574V
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|[https://www.digikey.com/en/products/detail/rubycon/16MH522MEFC5X5/3562746 DigiKey] [https://www.mouser.com/ProductDetail/KEMET/ESS226M016AC2AA?qs=gt1LBUVyoHkGzwb5ozvzug%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-35MH522MEFC6-3X5_C473191.html LCSC]
|[https://www.digikey.com/en/products/detail/rubycon/16MH522MEFC5X5/3562746 DigiKey] [https://www.mouser.com/ProductDetail/KEMET/ESS226M016AC2AA?qs=gt1LBUVyoHkGzwb5ozvzug%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-35MH522MEFC6-3X5_C473191.html LCSC]
|}
|}
{| class="wikitable sortable"
|+Active Components
!RefDes
!Qty
!Compatible Part Number
!Order Links
|-
|U1
|1
|L7805CV
|[https://www.digikey.com/en/products/detail/stmicroelectronics/L7805CV/585964 DigiKey] [https://www.mouser.com/ProductDetail/STMicroelectronics/L7805CV?qs=9NrABl3fj%2FqplZAHiYUxWg%3D%3D Mouser] [https://www.lcsc.com/product-detail/Voltage-Regulators-Linear-Low-Drop-Out-LDO-Regulators_STMicroelectronics-L7805CV_C111887.html?s_z=n_L7805CV LCSC]
|-
|U2
|1
|LM2902N
|[https://www.digikey.com/en/products/detail/texas-instruments/LM2902N/372804 DigiKey] [https://www.mouser.com/ProductDetail/Texas-Instruments/LM2902N?qs=YEaxc5757jPRu1PLnih86g%3D%3D Mouser] [https://www.lcsc.com/product-detail/Operational-Amplifier_HGSEMI-LM2902N_C22461599.html?s_z=n_LM2902N LCSC]
|}
{| class="wikitable sortable"
{| class="wikitable sortable"
|+Capacitors
|+Capacitors

Latest revision as of 02:35, 20 February 2025

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 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

LiftMaster (Chamberlain) Garage Door Opener logic board.

"Logic Board" part is plastic housing/cover that has two PCBs attached to it.

LiftMaster 41AS050-1 is otherwise same except uses different plastic housing.

LiftMaster 41AS050R1M Logic Board Unit

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

LiftMaster 41AS050R1M Logic Board
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
Active Components
RefDes Qty Part Number/Model Number Manufacturer (if applicable) Explanation Datasheet
U1 1 L7805CV STMicroelectronics Positive Voltage Regulator L78
U2 1 LM2902N STMicroelectronics Quad Op-Amp LM2902x

Power Supply (PSU) Board

14LG574V

LiftMaster 041AS050R1M Power Supply Board
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

Logic Board

14LG626B

Capacitors
RefDes Qty Compatible Part Number Order Links
C1 1 ESS476M025AE2EA / ESS476M016AE2EA / 16MS747MEFC5X7 DigiKey Mouser LCSC
C2,C4,C6 3 860020672008 / 50PX4R7MEFC5X11 DigiKey Mouser LCSC
C3,C5 2 16MH522MEFC5X5 / ESS226M016AC2AA / 35MH522MEFC6.3X5 DigiKey Mouser LCSC
Active Components
RefDes Qty Compatible Part Number Order Links
U1 1 L7805CV DigiKey Mouser LCSC
U2 1 LM2902N DigiKey Mouser LCSC
Capacitors
RefDes Qty Compatible Part Number Order Links
C204 1 860020575013 / 35ZLH330MEFCT810X12.5 DigiKey Mouser LCSC

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

Related Links

References

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