Sharp PG-F320W Service Manual page 37

Checking the LAN
LAN communication is disabled even though connecting the con-
trol 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?
Are the network device (e.g. Hub) between the control PC and
cable normal?
When data is sent from the control PC, do pins (30) and (31) of
IC8201 (PHY receiver) receive signals?
Check the PHY receiver IC8201 and the peripheral circuits of the
microprocessor IC8001.
YES
YES
YES
YES
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.
NOTE: When IC8003 (EEPROM) is replaced, the MAC address
returns to default. Refer to "Resetting after replacing
IC8003 (EEPROM)" to reset.
NO Repair defective parts in the network.
NO Check the peripheral circuit of J8201 (RJ-45 jack with built-in
transformer).
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PG-F320W