1. LAN Sephiroth Kwon GRMA 26-05-2009

2. OUTLINE Diagram Voltage Clock Head Signal Description Repair Flow Chart

3. LAN - Diagram Controller IC EEPROM OR FLASH 3VSB VOLTAGE CLOCK Reset South &North Bridge How many kinds of clock signals are there? How many kinds of voltage are there? And where are they come from? MAC Address

4. LAN – MAC Address SMBus Interface SPI Interface

5. LAN - Voltage There are 3 way to produce the voltage of LAN IC exclude 3VSB. –Internal regulator –Internal linear regulator –External regulator

6. LAN - Internal regulator

7. LAN - Internal linear regulator

8. LAN - External regulator

9. LAN - Clock C_PCIE_L1 C_PCIE_L1# REFCLK_P REFCLK_N CKTAL1 CKTAL2 LAN IC 25Mhz It’ s come from the main clock. If this pair of clock signal is error, please check the main clock IC.

10. LAN Port Connect to Port

11. LAN - Head Signal Description

12. LAN-Repair Flow Chart START Visual Inspection check Lan connector & related components are not damaged. Change damaged connector / component Measure Lan Voltage Check Lan Voltage 3VSB, 2.5VSB, 1.2SB.... Change NG transistor (Q) or fix any trace open Measure Lan Clock Check Lan 25Mhz & PCI CLK 33Mhz or PCIE CLK Change NG X’TAL /CLK Gen. Fix any trace open Check slot signals, compare with good MB Fix any trace / remove any NG PCI device Change Lan Chip Measure Lan Transformer Change NG Transformer Change SB Finished NG OK NG OK Measure Lan AD signals(PCI)

13. LAN-Repair Flow Chart (Lan Mac ID error) START Mac ID error Mac can be Check ? Check Lan EEPROM 3VSB Change EEPROM / Re-Write Mac again Go to check Lan (refer to previous page) Check & fix any 3VSB trace open Finished Re-write Mac ID Re-check Mac ID again Go to check Lan (refer to previous page) Change EEPROM / Re-Write Mac again YesNo OK NG OK NG OK NG OK NG

14. Thank You!