Service manual

62 VAXstation 3100 (Model 76) System
2. Select the appropriate dip switch setting.
4.2.7 Memory SIMM Removal
To remove a memory module:
1. Remove the system box cover (refer to Section 4.2.1).
2. Remove the drive plate (refer to Section 4.2.5).
CAUTION 1
Memory components are easily damaged with static electricity.
An antistatic wriststrap should always be worn when
installing or removing memory components.
CAUTION 2
The memory SIMMs are keyed and should be installed in only
one direction. Excessive force applied to the SIMMs when
they are not properly aligned with the connector can cause
permanent damage to either the SIMM or connector.
NOTE
Memory SIMMs must always be removed starting from the
rear of the system. For example, if you are going to replace
the SIMM at the front of the system board, you must remove
the other three starting at the rear and working toward the
front. Memory modules are numbered on the outer edges of
the memory connectors located on the system board.
3. To remove a SIMM, release the two metal retainers located on each
SIMM memory connector (refer to Figure 4–22). Tilt the module
approximately 55 degrees to the rear of the unit and lift out (refer to
Figure 4–22).
CAUTION
Failure to release the two memory retainers will permanently
damage the memory connector located on the system board.
4. Repeat the previous step for each memory SIMM that must be
removed.
5. Reverse this removal procedure to install a new SIMM, noting the
following. Be sure to insert the new SIMM at the angle it was
removed, then tilt upward until the retainers lock into place.