3 Component Removal and Replacement



This chapter provides information needed to remove and replace SIMMs (on the system- or expansion memory board), fuses, boot PROMs, and NVRAMs.

Follow procedures in Chapter 1, "Preparation" and Chapter 2, "Printed Circuit Board Removal and Replacement" before attempting to remove components.

After replacing any component and installing the board into the card cage, monitor the power on process. Continue to Chapter 4, "Troubleshooting" to ensure that the system passes the Power-On Self-Tests and boots up.

3.1 SIMM Removal and Replacement

SPARCsystem 600MP series systems may have 64 to 512 Mbyte of ECC Single In-line Memory Modules (SIMMs) installed on the system board. Depending on system type, you may have one or two optional expansion memory boards with a total of 512 Mbyte ECC SIMM memory. Total system memory may not exceed 1 Gbyte. Use this section in conjunction with Appendix A, "SIMM and Jumper Configuration" when removing and replacing SIMMs.

3.1.1 Optional SIMM Installation

If you have purchased optional SIMMs and intend to install them yourself, read Appendix A, "SIMM and Jumper Configuration" before proceeding. Once you are familiar with the configuration rules, turn to the section in this chapter, "Installation" to complete the installation procedure.

Caution -

Use Sun ESD kit P/N 250-1088 (or equivalent) when installing integrated circuits, printed circuit boards, and drives in a SPARCsystem 600MP. Follow the instructions printed on the ESD mat. Refer to Section 1.4, "Electrostatic Discharge Precautions" for a description of the ESD mat.
Do NOT use ESD kit P/N 560-1302 when working on SPARCsystem 600MP boards.

3.1.2 Removal

Before following these instructions, access the board intended for SIMM removal. Ensure you follow procedures in Chapters 1 and 2 for powering off the system, accessing the card cage, and removing the board.

To remove a SIMM on the system board or expansion memory board:

    1. Locate the faulty SIMM as indicted by the Power-On Self-Test.

    If the SIMM is on the system board, see Figure A-1, "SIMM and Jumper Locations on the System Board."
    If the SIMM is on the memory board, see Figure A-2, "SIMM and Jumper Locations on the Expansion Memory Board." Refer to Appendix A, Section A.2.3.1 to identify the failed board and u-number.

    2. Orient the board with the (bar code) label side of the SIMMs facing you.
    3. Orient the SIMM extraction tool with the crossbar section vertical to the SIMM.
    4. Insert the hook on the end of the crossbar into the hole on the left edge of the label side of the SIMM.

    See Figure 3-1.

    Figure 3-1 SIMM Extraction - Left Edge

    5. Rotate the tool away from the socket to lift the SIMM.
    6. Insert the hook on the other end of the crossbar into the hole on the right edge of the SIMM.

    Figure 3-2 SIMM Extraction - Right Edge

    7. Rotate the tool away from the socket to lift the SIMM.
    8. Remove the SIMM from the socket and place it in an antistatic bag.

3.1.3 Installation

    1. Locate the SIMM slot on the board.

    Locate the intended U-number and SIMM bank shown in Figure A-1, "SIMM and Jumper Locations on the System Board," or Figure A-2, "SIMM and Jumper Locations on the Expansion Memory Board."

    2. Remove the SIMM from its antistatic package.
    3. Hold the SIMM at its edges. Ensure the notched end is correctly oriented for that board. See Figure 3-3 and Appendix A for reference.
    4. Orient the SIMM in the slot so the latches fit in the holes at both corners.

Caution -

It is very important not to flex the board when you insert the SIMM, or press the board into a hard surface.

    5. Press firmly on the SIMM until both corners snap into place.

    If the SIMM does not insert easily, check its pin 1 orientation.

    Figure 3-3 Location of Pin 1 on a SIMM

3.2 Fuse Removal and Replacement

This section describes how to remove and replace any fuses on the system board. The location of the fuses is shown in Figure A-1, "SIMM and Jumper Locations on the System Board." All fuses have the same Sun part number.

Caution -

Use Sun ESD kit P/N 250-1088 (or equivalent) when installing integrated circuits, printed circuit boards, and drives in a SPARCsystem 600MP. Follow the instructions printed on the ESD mat. Refer to Section 1.4, "Electrostatic Discharge Precautions" for a description of the ESD mat.
Do NOT use ESD kit P/N 560-1302 when working on SPARCsystem 600MP boards.

To remove a fuse:

    1. Grip the fuse with two fingers.

    The plastic fuse socket is oriented horizontal to the system board.

    2. Using a side to side motion, work the fuse out of the socket.

    The fuse may fit very snugly within the socket.

To replace a fuse:

    1. Match the two pins with the holes in the socket.
    2. Insert the fuse in the socket.

    Table 3-1 Fuses on the 600MP System Board

Fuse Value Label Rating Serial port +12V F2801 1.5A@125V Serial port -12V F2802 1.5A@125V Ethernet +12V F2301 1.5A@125V SCSI +5V F2201 1.5A@125V Keyboard/mouse +5V F2601 1.5A@125V

3.3 Integrated Circuits on the System Board

This section covers removal and replacement procedures for the Non-volatile Random Access Memory (NVRAM) and the boot PROMs, also called Erasable Programmable Read-Only Memory (EPROM).

3.3.1 NVRAM Removal

Note - If the system board is replaced, you will need to remove the NVRAM from the original board and place it on the new board. The NVRAM contains unique information about a system, such as its serial number, ethernet address, and system type, and must remain with the system.

The location of the NVRAM is shown in Figure A-1, "SIMM and Jumper Locations on the System Board."

Caution -

Use Sun ESD kit P/N 250-1088 (or equivalent) when installing integrated circuits, printed circuit boards, and drives in a SPARCsystem 600MP. Follow the instructions printed on the ESD mat. Refer to Section 1.4, "Electrostatic Discharge Precautions" for a description of the ESD mat.
Do NOT use ESD kit P/N 560-1302 when working on SPARCsystem 600MP boards.

    1. Remove the SBus cards (if any) in slots 2 and 3.

    If cards are installed in these slot positions, you will be unable to access the component. See Section 2.7, "Removing an SBus Card" to remove an SBus card.

    2. Under one end of the NVRAM, insert a small flatblade screwdriver between the component and its socket.
    3. Use a side-to-side and upward motion with the screwdriver to work the NVRAM loose from the socket.

    Repeat this step on the opposite end to work the component free.

3.3.2 NVRAM Replacement

    1. Position the NVRAM correctly on its socket - align the pins to the socket.

    Pin 1 of the NVRAM is marked by a dot depression on the component surface. Pin 1 on the socket is below the notch, facing the system board connectors. Figure A-1 shows the NVRAM positioned on the system board.

    2. Press firmly on the NVRAM to seat it into the socket.
    3. Replace any SBus cards that were removed for this procedure.

    See Section 2.8, "Installing or Replacing an SBus Card" to replace the card.

3.3.3 Boot PROM Removal

Use this procedure for Boot PROM upgrades. The location of the 4 boot PROMs are shown in Figure A-1, "SIMM and Jumper Locations on the System Board." See Table 1-1 for boot PROM part numbers.

Caution -

Use Sun ESD kit P/N 250-1088 (or equivalent) when installing integrated circuits, printed circuit boards, and drives in a SPARCsystem 600MP. Follow the instructions printed on the ESD mat. Refer to Section 1.4, "Electrostatic Discharge Precautions" for a description of the ESD mat.
Do NOT use ESD kit P/N 560-1302 when working on SPARCsystem 600MP boards.

    1. Remove the SBus cards (if any) in slots 0 and 1.

    Refer to Section 2.7, "Removing an SBus Card" to remove an SBus card. The PROMs are now accessible.

    2. Under one end of the boot PROM, insert a small screwdriver between the component and its socket.
    3. Use a side-to-side and upward motion with the screwdriver to work the boot PROM loose from the socket.

    Repeat Steps 2 and 3 on the opposite end to work the component free.

3.3.4 Boot PROM Replacement

    1. Verify that you are installing the correctly labeled boot PROM.

    Each boot PROM has a different part- and U-number associated with it.

    2. Position the boot PROM correctly on the socket, carefully aligning the pins to the socket.

    Boot PROM and pin 1 locations are shown in Figure A-1, "SIMM and Jumper Locations on the System Board."

    3. When you are certain that the pins are aligned to the socket, press firmly on the boot PROM to seat it into the socket.
    4. Replace any SBus cards that were removed for this procedure.

    See Section 2.8, "Installing or Replacing an SBus Card" to replace a card.