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LAN

LAN. Sephiroth Kwon GRMA 26-05-2009. OUTLINE. Diagram Voltage Clock Head Signal Description Repair Flow Chart. LAN - Diagram. Controller IC. Reset. South &North Bridge. CLOCK. VOLTAGE. MAC Address. How many kinds of voltage are there? And where are they come from?.

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LAN

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  1. LAN Sephiroth Kwon GRMA 26-05-2009

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

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

  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. NG Change damaged connector / component OK OK Measure Lan Voltage OK NG Check Lan Voltage 3VSB, 2.5VSB, 1.2SB.... Change NG transistor (Q) or fix any trace open OK NG Check Lan 25Mhz & PCI CLK 33Mhz or PCIE CLK Measure Lan Clock OK Change NG X’TAL /CLK Gen. Fix any trace open NG NG OK Measure Lan AD signals(PCI) NG Check slot signals, compare with good MB Fix any trace / remove any NG PCI device OK OK NG NG Measure Lan Transformer Change NG Transformer OK OK NG OK Change Lan Chip NG Finished Change SB

  13. LAN-Repair Flow Chart (Lan Mac ID error) START No Mac ID error Mac can be Check ? Yes Check Lan EEPROM 3VSB Re-write Mac ID Re-check Mac ID again NG OK Check & fix any 3VSB trace open NG OK OK NG Change EEPROM / Re-Write Mac again OK Change EEPROM / Re-Write Mac again NG NG Go to check Lan (refer to previous page) OK Go to check Lan (refer to previous page) Finished

  14. Thank You!

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