Unilumin UHWII Series, Product Manual

Page: 99 / 118

Chapter 6 Troubleshooting and Component Replacement
89
6.1.3 Screen Blinking
Causes:
1) The ports on the sending box are loose, or the signal cables are too long.
2) The output resolution of the playing device or sending box is set incorrectly.
Troubleshooting method:
1) Check whether the DVI cable and signal cable are connected to the display and
devices, or whether the length of signal cables exceeds the maximum
transmission distance (the effective transmission distance shall not exceed 10 m
for DVI cable, 100 m for signal cable, 300 m for multi-mode optical fiber, and 15
km for single-mode optical fiber).
2) Check whether the resolution of the playing device and the sending box is greater
than or equal to the resolution of the screen.
6.1.4 Blinking of a Cabinet in the Display
Causes:
1) The output of receiving card or hub card is faulty.
2) The receiving card program is incorrect.
Troubleshooting method:
1) Check whether the receiving card signal cable and hub card in the cabinet are
connected correctly.
2) Check the receiving card program for the cabinet or check the receiving card.
6.1.5 Failure in Lighting up of a Cabinet in the Display
Causes:
1) The power supply, receiving card, or hub card for the cabinet is faulty.
2) Signal output of the previous cabinet is faulty.
Troubleshooting method:
1) Check voltage at the DC side of the power supply and the receiving card power
supply. Check the receiving card signal indicator light in the cabinet. Check
whether the hub card contacts properly with the receiving card.
2) Check output signals of the receiving card of the previous cabinet, or replace the
signal cable.