User`s manual

User’s Manual
142 Appendices
APPENDIX H: TROUBLESHOOTING GUIDE
If the solutions to common problems presented here do not correct the problem
experienced with the DigiMux, see a qualified service person for assistance.
NOTE: Equipment replacement and repair should be carried out by a qualified
service person. See
Maintenance on page 99 for information regarding
DigiMux maintenance and repair.
Most Frequently Reported Failures
Symptom: The Function keys on the front panel do not work.
Reason: The keys are locked.
Solution: Press and hold the LOCK key for three seconds to unlock the keys.
Reason2: The Front Panel PCB is damaged.
Solution: Contact a qualified service person to replace the Front Panel PCB.
Reason3: The Main Board is damaged.
Solution: Contact a qualified service person to replace the Main Board.
Symptom: The unit cannot be turned on after connecting the 19V DC to a power source.
Reason: The 19V Adaptor is damaged.
Solution: Replace the 19V adapter and retry the connection.
Reason2: The 19V DC jack on the rear panel has a poor contact.
Solution: Improve the center contact (Positive polar) of the DC jack.
Reason3: The Main Board is damaged.
Solution: Contact a qualified service person to replace the Main Board.
Symptom: A specific channel is displaying live video poorly.
Reason: Camera failure or incorrect camera settings.
Solution: Refer to Camera on page 43 for information concerning the correct
camera settings.
Reason2: The video cable is too long, or is defective.
Solution: Replace the defective video cable, or add a video signal repeater.