Keysight N9010A EXA Service Guide 361
Front Panel/Motherboard Troubleshooting
A1 Front Panel Assembly
A1 Front Panel Assembly
The major components of the A1 Front Frame Assembly are the A1A2 Front
Panel Interface Board, A1A3 LCD, A1A4 LCD Inverter Board/DC-DC Converter,
and the A1A5 Front Panel USB Interface Board, all of which are serviceable as
individual components.
The A1 assembly is used to display the measurement results, accept user input
via the keyboard, and connect USB peripheral devices.
A1A2 Front Panel Interface Board
The A1A2 Front Panel Interface board is serviced as an assembly only; no
component level repair is supported.
The Front Panel Interface Board contains LCD control, Inverter drive, audio
amplifiers, internal speaker, a 4 port USB hub, and a USB keyboard
microcontroller.
The two different front panel rubber keypads attach to the back side of the
board, which has the keyboard contacts printed on the reverse side.
The 4 ports from the USB hub contained on this board go to the 2 front panel
USB connectors, the keyboard microcontroller, and the fourth port is unused.
A1A3 LCD
The LCD used is an 8.4 inch XGA TFT display, which as a resolution of 1024 x
768. It has two backlights that are not individually replaceable.
A1A4 LCD Inverter Board/DC-DC Converter
The Inverter Board provides the high voltage required by the LCD backlights
used on older EXA’s. Newer EXA’s us a DC-DC Converter to power the LED
backlights.
A1A5 Front Panel USB Interface Board
The Front Panel USB Interface Board provides the front panel USB
connections.
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