20
circular which is almost share the same center point. If the spot is perceived obviously not round, or
significantly deviates from the center, it will affect the performance of the instrument, and should be
sent to our factory to deal with
VI.
Malfunction and Troubleshooting
Failure phenomenon
Possible reasons
Remedies
The light doesn't shine
when the power is on.
1.
The switch is broken.
2.
LED lamp is broken.
3.
2A fuse is broken.
1.
Replace the switch or send
back to the factory for repair.
2.
Replace the source lamp or
send back to the factory for repair.
3.
Replace the 2A fuse.
No response when
pressing "Clear".
1.
The key contact is poor.
2.
The connection is poor.
3.
The count board is
broken.
1.
Press "Clear" key again.
2.
Replace the connector.
3.
Replace the count board.
No counting.
1.
The plug of the count
connection is off.
2.
The count board is
broken.
3.
The optical detection
system is broken.
1.
Replace the plug.
2.
Replace the count board.
3.
Send back to the factory for
repair.
It couldn't connect with
PC.
1.
The communication
cable is broken.
2.
The software in PC is
wrong.
1.
Check the cable and make sure
the weld point is fine.
2.
Contact the factory.
