Display Board; System Fans - Keysight 8990B Service Manual

Display Board

The display board controls the flat-panel display monitor. It translates the video
signals from the motherboard's on-board video system to the Low Voltage
Differential Signal (LVDS) signals that drive the monitor.

System Fans

The system fans consists of six fans. There are two large fans that draw air out of
the rear of the instrument, two medium fans that are positioned over each ADC to
give additional cooling, one small fan positioned over the trigger IC, and another
small fan installed on the backplane main board to give additional cooling. The
fans are all controlled by the
main FPGA.
Keysight 8990B Service Guide
Theory of Operation 2
61