Monitor Troubleshooting - GE LOGIQ E9 Service Manual

D 5180483-100, R
IRECTION
7-8-7 Monitor Troubleshooting (cont'd)
• Monitor does not work
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• Prints do not match monitor
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• Video test patterns are not clear, bright, parallel or square
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The LCD monitor used for LOGIQ E9 has a custom color profile (ICC Profile) programmed into the LCD
itself, which is designed to reduce noise in the image by suppressing low-level and very high-level gray
values. Due to this, the contrast setting also plays a role along with the brightness setting in the
'brightness calibration' test pattern. When using the SMPTE Pattern on systems running R4.3.0 or
earlier, please be aware that the LOGIQ E9 monitor gray level does not display falls in the noise range
(< 6 or > 225 on a 0-255 range of 8-bit gray scale values). The LOGIQ E9 intentionally displays a
gray value of < 6 as 0 (darkest) or a gray value above 225 as 255 (brightest). Although the
instructions on the SMPTE pattern screen may indicate that the display is not showing all the gray
levels, this behavior is normal. The SMPTE pattern version used on R4.3.0 and earlier was not fully
suitable for LCD technology.
In R5 and later versions, the pattern used to check calibration have been updated to suit the latest
Monitor technology.
R6 and later:
For further information about test patterns available on the, refer to the appropriate version of the
LOGIQ E9 Basic User Manual, Chapter 3. See: Table 1-8 "Basic User Manual and Release Notes per
LOGIQ E9 console" on page 1-22.
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PROPRIETARY TO GE
. 7
EV
Verify power is present to monitor
Check if video is present at external DVI connection (you may need an external monitor)
Verify factory default settings. Chapter 3 in the User Manual calls out suggested settings for
various exam and lighting conditions.
Replace the monitor
Section 7-8 - Troubleshooting Trees
LOGIQ E9 P
ROPRIETARY
S M
ERVICE ANUAL