Christie DHD675-E, Руководство по обслуживанию

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Section 3: Service Setup
E Series 675/775 Service Manual 3-5
020-000546-04 Rev. 1 (04-2017)
3.6 PC Mode
This section outlines functional tests that can be employed to verify performance of the projector. These tests
can be performed in conjunction with the troubleshooting process outlined in
Section 4 Troubleshooting ,
particularly when image quality is of concern. Calibration methods using the projector’s menu system are also
outlined.
NOTE:
Before starting a functional test, adjust the zoom and focus to provide the sharpest and
largest possible image size.
1. Choose the appropriate test signal: analog 1920 x 1200 @60Hz (for DWU675-E/DWU775-E); analog
1920 x 1080 @60Hz (for DHD675-E/DHD775-E) and connect to one of the projector VGA input ports.
2. Adjust Focus and Zoom for the largest and sharpest projected image.
3.6.1 Frequency and Tracking Boundary
Procedure
• Test equipment: video generator
• Test signal: analog 1920 x 1200 @60Hz (DWU675-E/DWU775-E); analog 1920
x 1080 @60Hz (DHD675-E/DHD775-E)
• Test Pattern: General-1 or Master
Check the image for optimal sharpness. If not optimal, re-adjust by pressing the
M
ENU
key to enter Main Menu for each step below, then select:
1. Size & Position > Size Presets > Full Size
2. Input Switching & PIP > Timing Detection Mode > OFF
3. Size & Position > Pixel Track function and use the
R
IGHT
or
L
EFT
arrow keys
to minimize video flicker.
4. Size & Position , adjust Horiz Position / Vert Position to center the image.
Inspection items
• Eliminate visual wavy noise using Resync , Frequency or Tracking selections.
• Horizontal and vertical position of the video should be adjusted to fit the screen.
Criteria
If there is noise on the screen, press the
M
ENU
key to select Size & Position > Pixel Phase for adjusting phase.
3.6.2 Color Performance
Procedure
• Test equipment: video generator.
• Test signal: 480p, 720p, 1080p
• Test Pattern: Master, 64 gray RGBW or SMPTE bar. Use 480p, 720p, 1080p Mas-
ter patterns to perform HDTV test. White should appear to be pure white (not
exhibit color temperature shift).