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Agilent Technologies 8753ET - Page 325

Agilent Technologies 8753ET
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6-8 Chapter 6
Digital Control Troubleshooting
Display Troubleshooting (A2, A18, A19, A27)
NOTE This procedure should be performed with a photometer and only by qualified
personnel.
1. Press to set the
display intensity at 100%.
2. Press
to set a white screen test pattern on the display.
3. Set the photometer probe to NORMAL. Turn on power to the photometer and allow
30 minutes of warmup time. Zero the photometer according to the manufacturer’s
instructions.
4. Center the photometer on the analyzer display as shown in Figure 6-4.
Figure 6-4 Backlight Intensity Check Setup
NOTE The intensity levels are read with a display bezel installed.
5. If the photometer registers less than 50 Nits, the display backlight lamp is bad. Refer to
the Chapter 14 , Assembly Replacement and Post-Repair Procedures,” for information
on display lamp replacement.
Display
MORE
ADJUST DISPLAY
INTENSITY
100 x1
System
SERVICE MENU
TESTS
62 x1
EXECUTE TEST
CONTINUE

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