Troubleshooting
Model: T621
Malfunction:
Safety key malfunction
Circumstance: Put the safety key in place. The display
does not operate. Display shows “safety key”.
Possible cause: Safety key board malfunction
Troubleshooting: 1. Inspect the safety key magnet.
2. Inspect the bridge board cable connections.
3. Test or replace the safety key board.
3-1-1
Display
board
Bridge
board
Safety key
board
Bridge board
Safety key connection
Safety key & safety key board
Safety key(reed switch test)
With safety key
Reed switch
ON
Without safety key
Reed switch
OFF
Reed switch
Summary of Contents for T621
Page 1: ...T621 Repair Manual Electronics ...
Page 4: ...1 1 Product Picture T621 1 1 1 ...
Page 5: ...1 2 Display T621 1 2 1 ...
Page 6: ...1 3 Component Placement T621 Display 1 3 1 Telemetry heart rate receiver board Display board ...
Page 7: ...1 3 Component Placement T621 Display 1 3 2 HTR board Bridge board Soft keys Safety key board ...
Page 11: ...1 5 Connections T621 Bridge Board 1 5 2 To safety key board To HTR board To display ...