LiftMaster 41AS050R1M
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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.
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
| 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 |
| 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
| 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 |
| RefDes | Qty | Brand | Model | Coil Voltage | Switch Config | Current (NC) | Mount |
|---|---|---|---|---|---|---|---|
| ? | 1 | Omron | G8P-1C4P | 24 V | SPDT | 10A | Through Hole |
| ? | 2 | Hongfa | JQC-3FF(555) | 24V | SPST | 10A | Through Hole |
Replacement Parts
Logic Board
14LG626B
| 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 |
| RefDes | Qty | Compatible Part Number | Order Links |
|---|---|---|---|
| U1 | 1 | L7805CV | DigiKey Mouser LCSC |
| U2 | 1 | LM2902N | DigiKey Mouser LCSC |
| RefDes | Qty | Compatible Part Number | Order Links |
|---|---|---|---|
| C204 | 1 | 860020575013 / 35ZLH330MEFCT810X12.5 | DigiKey Mouser LCSC |
| RefDes | Qty | Compatible Part Number | Order Links |
|---|---|---|---|
| ? | 1 | J115F11C24VDCSH.9 | DigiKey |
| ? | 2 | JQC-3FF/024-1HS(551) | LCSC |
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f 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/