Operation
Instruction manual 854 ATG Page 27
4.1.1 XPU display
Display contrast
For best readability the viewing angle can be adjusted, using a small potentiometer on the XPU board, on the
bottom left (refer to figure). Normally, it is adjusted in the factory for viewing horizontally.
Repeatability test
If the test magnet (item 7 of the tool kit) is hold for approximately 5 seconds in front of the rectangle block
below the display, a repeatability test is performed. If the test magnet is hold for more than 8 seconds, a lock
test is performed. The lock test function is cancelled when the magnet is removed.
4.1.2 XPU-2 display
D
isplay contrast
Item CD allows the user to adjust the display contrast for maximum readability. CD can be set between 01
(minimum contrast) and 16 (maximum contrast). The display contrast can also be adjusted by means of the
hall switches.
Additional displays
There are four hall switches located on the XPU-2 display, marked: “L”, “R”, “U” and “D” (refer to figure).
These switches can be operated by holding a magnet in front of them (not the test magnet!).
Switch “L” allows scrolling through several additional displays. When an additional display is selected, further
information can be requested by operating the other switches. After 3 seconds the display switches back to
the standard display format (programmed by item DF).
The additional display gives information on:
• Display configuration
• NOVRAM item view
• XPU-2 error list
• System configuration
• Diagnostic view
• Test - Lock test - Unlock
The table on next page gives an overview of the additional display selections.
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