XG-C455W (serv.man5). Troubleshooting Table - Sharp Projector Service Manual (repair manual). Page 7

XG-C455W/PG-C355W

5 – 7

LAN communication is disabled even though 
connecting the control PC with a LAN cable. The 
LINK LED (green) does not light up.

 

Are the connection of connecting cable and the 
settings of IP address, sub-net address and 
default gateway correct?

NO

Check the connecting cable and LAN settings. If the LAN settings are       
unknown, contact the network administrator. 
If the network settings cannot be saved, replace IC6708 (EEP ROM) as it may 
be defective.

YES

Note: When IC6708 (EEP ROM) is replaced, the MAC address returns to 
default. Refer to "Resetting after replacing IC6708 (EEP ROM)" to reset.

Are the network device (e.g. Hub) between the 
control PC and XG-C455W and cable normal?

NO

Repair defective parts in the network.

YES

When data is sent from the control PC, do pins 
(30) and (31) of IC8201 (PHY receiver) receive 
signals?

NO

Check the peripheral circuit of J8201 (RJ-45 jack with built-in transformer).

YES

Check the PHY receiver IC8201 and the periph-
eral circuits of the microprocessor IC8001.