Genie 38877RS Dual-Encoder Garage Door Opener Control Board – Non-Configured Series II Replacement Circuit Board
Genie 38877RS Dual-Encoder Garage Door Opener Control Board – Non-Configured Series II Replacement Circuit Board
Genie
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Genie 38877RS Dual-Encoder Garage Door Opener Control Board – Non-Configured Series II Replacement Circuit Board
Product Description
The Genie 38877RS Dual-Encoder Control Board is a replacement circuit board for select Genie and Overhead Door residential garage door openers equipped with compatible DC motors and Series II controls.
This board manages the opener’s motor operation, travel limits, remote-control programming, wall-console inputs, Safe-T-Beam safety sensors, lighting, and compatible optional accessories. It is intended to replace a failed or damaged original control board without requiring replacement of the complete garage door opener.
Important: This is a non-configured replacement board. The board must be correctly configured for the specific opener model before installation. Configuration may require removing the designated resistor or resistors identified in the applicable Genie service instructions. Incorrect configuration can prevent proper operation or damage the opener.
Product Specifications
- Manufacturer: Genie
- Genie part number: 38877RS / 38877R.S
- Product type: Garage door opener control board
- Configuration: Non-configured
- Control system: Genie Series II
- Encoder connection: Dual-encoder/opto-sensor compatible
- Application: Select Genie and Overhead Door residential openers
- Package quantity: One control board
- Wall console: Not included
- Remote controls: Not included
- Safety sensors: Not included
- Installation hardware: Reuse existing hardware unless otherwise specified
Compatible Genie Models
This control board is commonly used with select versions of the following Genie opener models:
- 3022
- 3024
- 3042
- 3062
- 3064
- 4022
- 4024
- 4042
- 4062
- 4064
- 7030
- 7060
- 8030
- 8060
Compatible product families may include:
- Genie IntelliG 1000
- Genie IntelliG 1200
- Genie ChainMax 1000
- Genie ChainMax 1200
- Genie SilentMax 1000
- Genie SilentMax 1200
- Genie PowerMax 1200
- Genie PowerMax 1500
- Genie TriloG 1200
- Genie TriloG 1500
- Certain corresponding Overhead Door Odyssey operators
Compatibility can vary by production date, motor type, original board number, wiring configuration, and opener revision. Match the original control-board number and opener model before ordering.
Common Uses
This replacement control board may be used when a compatible opener experiences symptoms such as:
- Opener has power but does not operate correctly
- Motor will not start despite verified power
- Travel limits cannot be programmed
- Remote controls will not program
- Wall console does not communicate with the opener
- Safety-sensor inputs are not functioning correctly
- Opener runs unpredictably
- Original circuit board has visible electrical or surge damage
These symptoms can also be caused by damaged wiring, a failed motor, encoder problems, safety-sensor faults, wall-console issues, or an electrical supply problem. Diagnose the opener before replacing the board.
Important Configuration Notice
The Genie 38877RS ships as a non-configured control board.
Before applying power, the installer must determine the correct board configuration for the exact garage door opener model. This may require removing one or more model-specific resistors according to Genie’s service instructions.
Do not install or energize the board until the configuration has been confirmed. A board configured for the wrong opener may not operate correctly.
Dual-Encoder and Motor Compatibility
Compatible Genie openers may use different motor and encoder arrangements. During installation, the technician must identify the opener’s motor type and connect the correct opto-sensor or dual-encoder harness to the appropriate control-board connection.
Do not assume that every harness connection is identical simply because the board physically fits the opener. Genie’s installation instructions distinguish between different motor and encoder configurations.
Important Matching Notes
Before ordering, verify all of the following:
- Exact Genie or Overhead Door opener model
- Original control-board part number
- Motor type
- Encoder or opto-sensor configuration
- Series II wall-control compatibility
- Existing wire-harness connections
- Production date and opener revision
- Required resistor configuration
The opener model number is normally located on a label attached to the powerhead. The original control-board number may be printed directly on the circuit board.
Electrical control boards are model-specific components. Do not order by appearance alone.
Package Contents
- One Genie 38877RS non-configured dual-encoder control board
Only the circuit board is included unless additional components are specifically shown or stated in the listing.
Installation Notes
Installation generally requires:
- Closing the garage door completely
- Disconnecting the door from the opener
- Unplugging the opener from electrical power
- Removing the opener cover
- Labeling and disconnecting the existing wire harnesses
- Removing the original control board
- Configuring the replacement board for the correct opener model
- Connecting the proper motor and encoder harnesses
- Reassembling the opener
- Resetting travel limits
- Reprogramming remote controls
- Performing a complete safety-reversal test
Travel limits, transmitters, wall controls, and safety functions may need to be programmed again after the control board is replaced.
Installation and Safety Warning
Disconnect electrical power before opening or servicing the garage door opener.
Circuit-board replacement should be performed by a qualified garage door technician or an individual experienced with electrical components and Genie opener configuration procedures.
Do not touch circuit-board components while the opener is connected to power. Use proper static-electricity precautions when handling the board.
After installation, test the Safe-T-Beam photo-eye system, force reversal, travel limits, wall console, remote controls, and manual emergency release before returning the opener to service.
Genie 38877RS Dual-Encoder Control Board | Non-Configured Series II Circuit Board
Shop the Genie 38877RS dual-encoder control board for select Genie and Overhead Door Series II garage door openers. Non-configured replacement circuit board requires model-specific setup before installation.
Details
Need Help With Compatibility?
Not sure if this is the correct part for your garage door, operator, gate system, or application? Contact Us before ordering — we’re happy to help.
Garage-DoorParts.com carries a large selection of residential and commercial parts, and many components can look similar while having important differences in dimensions, model numbers, voltage, mounting, or compatibility.
For the best assistance, please provide as much information as possible, including the manufacturer, model number, part number, door or operator type, dimensions, and clear photos of the existing part or equipment.
Our goal is to help you identify the correct product before you order and reduce the possibility of ordering an incompatible part.
Contact Us with your product questions and compatibility information, and we’ll do our best to point you in the right direction.
Shipping & Returns
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We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.
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