Marantec 97798, Logic Board ( Replacement Kit ) M4500 / M4700
The Marantec 97798 logic board replacement kit is the main control-board service kit for select M-Line EOS openers in the M4500 and M4700 family. The logic board is the operator brain: it interprets wall-control and receiver commands, manages opener setup, monitors safety inputs, and coordinates the motor and power board side of the system. This kit is commonly used when a technician has narrowed the problem to the logic section rather than the wall station, radio receiver, power board, motor assembly, or door hardware. Because Marantec M-Line boards changed by model and generation, the safest way to order is by the original board number, opener label, and parts diagram. Some references list 97798 as replacing older number 78914, but the physical connector and terminal arrangement still need to match.
Compatible With
- Marantec M4500E garage door openers
- Marantec M4500EL garage door openers
- Marantec M4700E garage door openers
- Marantec M4700EL garage door openers
- Marantec M4500 / M4700 service references when the parts diagram calls for 97798
- Older board number 78914 references where 97798 is confirmed as the replacement
- Not for M4900E unless the exact parts diagram confirms this board
- Not for Synergy LC, Synergy 200/300, RV 8000, LC 1000, or Mac-Lift operators
Features and Specifications
| Manufacturer | Marantec |
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| Product Type | Logic board replacement kit |
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| Part Number | 97798 |
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| Application | Main logic board replacement for select M4500E / M4700E family openers |
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| Compatible Operator Type | Marantec M-Line EOS garage door openers |
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| Included Components | Logic board kit; some listings reference terminal board components |
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| Related Board References | 78914, 88572, 89228 when confirmed by parts listing |
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| Notes | Match opener model, board number, and terminal layout before ordering |
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Also Known As / Related Part Numbers
- 97798
- MAR-97798
- Marantec 97798 logic board
- Marantec 97798 logic control board
- M4500E logic board
- M4700E logic board
- M4500EL logic board
- M4700EL logic board
- 78914 older board reference
- 88572 terminal board reference
- 89228 terminal board reference
Technician Note
A logic board should not be replaced until the door balance, safety sensor alignment, wall control wiring, receiver, and power board have been checked. A stuck door or shorted accessory wire can make a good board look bad.
Before Ordering
- Confirm the opener model is M4500E, M4500EL, M4700E, or M4700EL
- Compare the original board number and terminal strip layout
- Check whether the older 78914 board reference applies to your opener
- Inspect the power board and harnesses before installing the new logic board
- Be prepared to reprogram operator settings and remotes after replacement
Important Ordering Warnings
- Do not confuse M-Line EOS boards with Synergy or RV 8000 boards
- Do not bypass safety sensors during diagnosis or after board replacement
Professional Advisory
Disconnect power before servicing a garage door opener. If the opener has damaged wiring, signs of heat, repeated fuse failure, unsafe door movement, or a door that will not balance by hand, have the system checked by a qualified garage door technician before replacing parts.
Product Questions and Answers
Which openers use the 97798 logic board kit?
It is commonly listed for Marantec M4500E, M4500EL, M4700E, and M4700EL openers, with some M4500 / M4700 service references.
Does 97798 replace older number 78914?
Several parts references list 97798 with older 78914 replacement information, but the opener model, connector layout, and parts diagram should still be confirmed.
What problems can a bad logic board cause?
A failed logic board can cause no response, erratic setup, command failure, or control issues, but similar symptoms can also come from wiring, receiver, power board, or safety sensor faults.
Will my remotes need to be programmed again?
Remote and setting programming may need to be reviewed after replacing the logic board, depending on the receiver and setup used on the opener.
Is this board compatible with the M4900E?
Do not assume M4900E compatibility unless the exact parts diagram calls for 97798. The M4900E appears more often with other related M-Line parts.
