UNCLASSIFIED 10/27/2021
` UNCLASSIFIED ii
TABLE OF CONTENTS
1Introduction................................................................................................................1
1.1 Purpose...............................................................................................................1
1.2 Scope...................................................................................................................1
2Equipment Overview................................................................................................1
2.1 Identification of Chassis....................................................................................1
2.2 Description of Field Replaceable Units (FRU)..............................................2
3Power Down and Removal of Non-Volatile Storage...........................................2
3.1 System Power Down.........................................................................................2
3.2 Disassemblyof the QFX5120-48YChassis and Identification of NV
storage...........................................................................................................................2
3.3 Remove Non-volatile components from the System Board......................13
3.4 Follow theassembly procedure in reverse order to assemble the
QFX5120-48Y Chassis..............................................................................................13
TABLE OF FIGURES
Figure 1 QFX5120-48Y Front view................................................................................2
Figure 2 QFX5120-48Y PSU FRUs and FAN FRUs..................................................3
Figure 3 Top cover screws –Top view.........................................................................3
Figure 4 Screws on left and right side of the system..................................................4
Figure 5 Top cover screws on bottom side..................................................................4
Figure 6 Slide & lift the top Cover..................................................................................5
Figure 7 Locating and removing main board...............................................................6
Figure 8 Locating main board heatsink supportplate ................................................7
Figure 9 Main board heatsink support plate removed................................................7
Figure 10 Main board SPI device for CPLD and FPGA.............................................8
Figure 11 Main board IDEEPROM................................................................................8
Figure 12 Main board QSPI device ...............................................................................9
Figure 13 CPU Board volatile and non-volatile memory devices...........................10
Figure 14 M.2 SATA SSD device on CPU Board.....................................................11
Figure 15 BIOS devices on CPU Board.....................................................................12
Figure 16 Management EEPROM on CPU Board....................................................12
Figure 17 CPU board IDEEPROM and CPLD SPI Flash........................................13
