XG-F315X (serv.man5). Troubleshooting Table - Sharp Projector Service Manual (repair manual). Page 9

PG-F310X/XG-F315X

5 – 9

(XG-F315X only)

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

YES

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 IC8003 
(EEPROM) as it may be defective.

YES

NOTE: When IC8003 (EEPROM) is replaced, the MAC address 

returns to default. Refer to “Resetting after replacing 
IC8003 (EEPROM)” to reset.

Are the network device (e.g. Hub) between the control PC 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 peripheral circuits of the 
microprocessor IC8001.