Troubleshooting
Model: T621
Malfunction: Key malfunction
– display
Circumstance of malfunction: Press display keys;
The display shows no reaction.
Or keys operate continually.
Possible cause: 1. Wires to the display board
are not connected properly.
2. Soft keys are bad.
Troubleshooting: 1. Inspect soft key connections.
2. Replace the soft keys.
3-3-1
Display board
Keypad
Soft key connection
Soft key
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 ...