Jeron 8650 Manual Jun 2026

| Symptom | Likely Cause | Manual Reference | |---------|--------------|------------------| | "System Fault" LED on solid | Data bus short or missing terminator | Section 6.2 – Check continuity between data lines; resistance should be 60 ohms (two 120-ohm terminators in parallel). | | Calls do not reset | Staff station not programmed as "reset capable" | Section 7.4 – DIP switch 7 on the staff station must be ON. | | Intermittent audio (crackling) | Loose ground connection | Section 4.1 – Tighten TB1 ground terminal; ensure shielded cable grounded only at the 8650 end. | | Corridor light stays on | Relay stuck or call not cleared | Section 8.3 – Power cycle the 8650. If persists, replace relay K1 (part # JER-RELAY-24). | | No chime on new call | Chime volume pot set to zero | Section 5.2 – Locate RV1 on the main board; turn clockwise with a small screwdriver. |

Jeron Cat. 8650 Nurse Call System | PDF | Electricity - Scribd jeron 8650 manual

From the manual: "After addressing, initiate a call from station 1. The corridor light and master annunciator should activate. Reset the call from the staff station. Verify cancellation." | Symptom | Likely Cause | Manual Reference

: If a data bus fault LED is lit, it may indicate a ground fault or a specific piece of equipment interfering with the signal. Disconnecting field wiring one by one starting from the master station can help isolate the faulty component. | | Corridor light stays on | Relay

Because the system is legacy, Jeron does not always host the manual publicly. However, reliable sources include: