Balboa Duplex Digital M-1 Circuit Board This board requires a 120v power supply and can work with any Duplex Digital Topside Control.

Also Replaces

• ThormoSpa 1900DR1C 51405
• Replaces 51656 But Looses Topside Back Light
• 1900DR1A
• 1900DR1D
• 2500ESR1C
• 410ER1C
• 51405
• 51542
• 51569
• 51586
• 54003
• 6300DR1A
• ALP50R1C
• BH50D
• C11JDR1A
• C11JDR1B
• C2000R1A
• C2000R1B
• C2000R1C
• DAK50R1B
• DIGDUPR1A
• DS50R1A
• DS50R1C
• DYN100R1E
• DYN100R1C
• MAS125R1A
• NOR124R1E
• P295R1A
• RET50R1A
• SS23DR1B
• SS23DR1C
• VIK100R1A
• VIK100R1B
• ZX500DR1A
• BAL54003
• 611311
• 9710-09