Samsung 5.Troubleshooting free download

File name 5.Troubleshooting.pdf

5. Troubleshooting 1) (1) Tools used for repairing the product System Diagnostics Disk MS-DOS Booting Disk System Diagnostics Card Screwdrivers ( , ) Tweezers Multi-meter Oscilloscope Logic analyzer (2) Replaceable Units (FRU: Field Replaceable Unit) DDR2 RAM Module 1.8" SFF HDD Wireless LAN Module Bluetooth Module DMB Module System Fan LCD Assy LCD Inverter Main Board Sub Board ? Left Sub Board, Right Sub Board Harness Cable ? Inverter Cable Wireless LAN Antenna DMB Antenna Assy FFC - Right Sub Board FFC FPC ? Left Sub Board FPC, LED FPC, HDD FPC, LCD FPC 5. Troubleshooting 2) Debugging Flow Chart 5. Troubleshooting 5. Troubleshooting 3) System Diagnosis (1) System Diagnostics Card The Diagnostics Card shows the system operations during the POST (Power On Self Test) in a 2 digit hexadecimal number by connecting the cable to the 10 pin connector left side the Sodimm slot after separating the Back Cover. The card is used to evaluate the reason for the malfunction without disassembling the system when the system malfunctions and to test if the system operates normally after replacing a defective FRU. 2) Debugging Code In general, if a defect of the circuit or part is detected during the system test, the system stops at a particular code. The error codes for each part of the system are listed in the following table. Code Beeps POST Routine Description 02h Verify Real Mode 03h Disable Non-Maskable Interrupt 04h Get CPU type 06h Initialize system hardware 08h Initialize chipset with initial POST values 09h Set IN POST flag 0Ah Initialize CPU registers 0Bh Enable CPU cache 0Ch Initialize caches to initial POST values 0Eh Initialize I/O component 0Fh Initialize the local bus IDE 10h Initialize Power Management 11h Load alternate registers with initial POST values 12h Restore CPU control word during warm boot 13h Initialize PCI Bus Mastering devices 14h Initialize keyboard controller 16h 1-2-2-3 BIOS ROM checksum 17h Initialize cache before memory auto size 18h 8254 timer initialization 1Ah 8237 DMA controller initialization 1Ch Reset Programmable Interrupt Controller 20h 1-3-1-1 Test DRAM refresh 22h 1-3-1-3 Test 8742 Keyboard Controller 24h Set ES segment register to 4 GB 26h Enable A20 line 28h