425 C Math Coprocessor Replacement - DEC DECstation 316+ Service Manual

3–16 FRU Replacement
3.2.10 425 Math Coprocessor Replacement
C
Replace the math coprocessor as follows:
1. Locate the math coprocessor on the DECstation 425
board (Figure 3–7).
2. Remove the coprocessor using a small, flat-blade screwdriver
to alternately lift each end. While lifting the coprocessor out
of the socket be careful not to damage the socket or bend any
of the pins on the coprocessor.
3. Before installing the new math coprocessor, straighten any
pins so they align with the holes in the socket.
4. Make sure pin 1 aligns with pin 1 of the socket. Pin 1 is
located in the lower left corner (Figure 3–7).
5. Install the coprocessor in the socket by alternately pressing
each end into the socket until the coprocessor is firmly seated
in the socket.
CPU
C