Epson ActionDesk 4000, User Manual

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If you are installing a 486 chip rather than a Pentium
OverDrive processor, you’ll see an extra row of holes
around the outside of the socket. The 486 chip will not fit
into the outside row of holes.
7. If your system has a ZIF socket, secure the processor chip by
pressing the ZIF handle back to the closed position.
8. If you are upgrading from a 486SX processor to a DX, DX2,
or Pentium OverDrive processor, you need to change the
jumper settings of J17 and Jl9. If you are upgrading to a
CPU with a different clock speed, you may need to change
the setting of jumper J16. See the tables on pages 4-7 and
4-8 for the correct jumper settings.
9. If you are upgrading to a DX/33, DX/50, DX2, or Pentium
OverDrive processor, you must install a heat sink or a heat
sink/fan assembly. Follow the instructions included with
the heat sink.
10. Run SETUP as described in Chapter 2 to update your
computer’s configuration with the new microprocessor.
Installing a Heat Sink
If you are installing a DX/33, DX/50, DX2, or Pentium
OverDrive processor, you must install a heat sink on the
processor chip. Follow the instructions included with the heat
sink.
If the heat sink has an embedded fan, connect the fan connector
into J12 on the system board. The casing for the fan connector
has a small triangle over pin 1. A triangle also identifies pin 1
on the system board. Align pin 1 on the connector with pm 1 on
the system board.
4-28
Installing and Removing
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