Service manual

VAXstation 3100 (Model 76) System 61
4. Grasp the module near the two connectors under the module and
lift the graphics coprocessor module off the system module. Refer to
Figure 4–21 for the location of the connector.
5. Reverse this removal procedure to install a new graphics module.
Module
Connectors
StandoffModule ConnectorsSystem Module
Graphics Coprocessor
Module
Power Supply
Standoff
MA-1334-90.DG
System Side View
Figure 4–21 Removing the Graphics Coprocessor Module - Sectional
View
4.2.6.1 Graphics Coprocessor Module 60Hz/66Hz Selection
There is a two position dip switch located on the Graphics Coprocessor
module (non-component side) that is used to switch between 60Hz and
66Hz monitor support.
• Switch #1 is inactive.
• Switch #2 should be in the ON position for 66 Hz monitors.
The dip switch can be accessed without removing the drive plate. To set
the dip switch:
1. Remove the storage drive located in drive position 1 (see Figure 4–5).
NOTE
Once the storage drive has been removed you can gain access
to the dip switch (white) through a opening in the drive plate
located near the power supply.