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LR3.9-7.8
User Manual
Step 3, Remove the adapter board and other wiring ( The red area is a high-voltage
danger area: the voltage is 110V / 220V AC. The green area is a low-voltage area: power
supply details is 5V DC)
Step 4, Remove the fixed screw of power supply
Step 5, Replace the new power supply and tighten the fixing screws;
Step 6, Connect the power cable on the power supply; The red area is a high-voltage
danger area: the voltage is 110V / 220V AC. The green area is a low-voltage area: power
supply details is 5V DC.
Note: For avoid high voltage electric shock, please disconnect the screen power before
disassembly; Please distinguish between live, neutral, and ground, 5V positive and
negative power cables.
4.4 Receive Card Maintenance
The receive card of LR3.9-7.8 supports rear maintenance only.
4.4.1 Receive card maintenance steps
Step 1, Remove the power box of the cabinet, please refer to 4.3 for more specific
operations.
Step 2,
Place the power supply horizontally and open the cover.
Step 3, Remove the screws of the receiving card (please note the blue circle mark).
Step 4, Unplug the receiving card and replace it.
Step 5, Install a new receiving card on the HUB card, please note that the direction of the
receiving card is opposite to the direction of the arrow on the HUB board (please note the
yellow box mark).
Step 6, Install the fixing screws.
