Sentex 1100072 processor board (listed as 110072) — the main control board with telephone interface for the Sentex Infinity series telephone entry systems: Infinity B, DI, L, M and S. The Infinity is a discontinued platform, and this board is a legacy part for keeping an existing unit in service; there is no current Chamberlain / LiftMaster replacement for it.
Legacy part — call before ordering. Stock is limited and the Infinity itself has been out of production for years. Read the number printed on your board (1100072) and the model on the unit, and call us to confirm availability before you order.
Specifications
| Part number | 1100072 (also written 110072) |
|---|---|
| Sentex description | Processor assembly with telephone interface, Infinity series |
| Fits | Sentex Infinity B, DI, L, M, S |
| Condition | Genuine Sentex |
Which systems use it
| System | Parts page |
|---|---|
| Sentex Infinity B | Infinity B parts |
| Sentex Infinity DI | Infinity DI parts |
| Sentex Infinity L | Infinity L parts |
| Sentex Infinity M | Infinity M parts |
| Sentex Infinity S | Infinity S parts |
Is the board actually the problem?
The board is the most over-ordered part on a telephone entry system. Work down this list before you buy:
| Symptom | Check first |
|---|---|
| Display dead, no backlight | The transformer and the fuse before the board |
| Will not dial out | The phone line, or the cellular / VoIP adapter feeding it, before the board |
| Dials but no audio either way | Speaker, microphone and the handset interface before the board |
| Dead after a storm | The board — and consider whether a new system is the better spend |
Related
Sentex & Elite phone system parts · EL2000 parts
Not sure which board you need? Send a photo of the number printed on your existing board to parts@gatehousesupplies.com or call 866-965-5599. We would rather confirm it than have you fit the wrong board.
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