Network Problems And Solutions - Samsung ML-651x series Service Manual

4.2.5 Network problems and solutions

Before Troubleshooting, check below check point.
Check Point
LAN cable check
Network LED check
Print Network test page
Printer SET status check
Network Printer Confi guration check
1. Address Confl ict check
A. IP address Confl ict : Same IP address in a network
• Unplug network cable and PING test
B. MAC address Confl ict : Same MAC address in a physical network
• Default MAC address or same MAC address (PING and ARP –a)
2. IP get method check (Panel or SWS)
A.DHCP/BOOTP : IP can be changed after rebooting
B. Auto IP address : Xerox Model default on
3. Protocol Enable / Disable, Port Number (In SWS)
4. IP fi ltering On/Off
5. SNMP community name check (When SNMP no response)
Service Manual
ML-551x / 651x series
4. Alignment and Troubleshooting
A. Connected or Not connected
B. Wrong cable (defected cable, crossover cable)
C. Connection connector (Link partner check)
A. Link LED check (Link LED On when connected)
B. Activity LED check (No packet Regularly blinking, packet random blinking
depend on Printer Model)
A. Printed correctly. If not, NIC is in lock up state or NIC can not communicate
with printer
B. Network address value check : IP address, Subnet Mask, Gateway, MAC
address
C. NIC F/W version (Correct or not)
1) V1.0x.xx : NPC3
2)V2.0x.xx : NPC3H
3)V3.0x.xx : PHY Board
4)V4.0x.xx : On Board
D. Protocol Enable / Disable
E. WLAN module / Status check if WLAN available.
A. Toner Empty, Paper Empty and so on : Hard Stop cases (Job can be
fi nished completely)
4-150
Action
Samsung Electronics