Inspection Procedure - Toshiba TDP-T8 Service Manual

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Inspection Procedure

Note: Do "Reset" in OSD menu before function test.
- Frequency and Tracking
Test Signal : 1024x768@60Hz (T8/T9); 800x600@60Hz (S8)
Test Pattern : Line Moire Pattern
* Check and see if image sharpness and focus are well performed.
* If not, readjust by following steps.
(1)
(2)
- Boundary
Test Signal : 1024x768@60Hz (T8/T9); 800x600@60Hz (S8)
Test Pattern : Boundary Frame
* Adjust Resync or adjust Frequency/H. Position/V. Position to the inner of
the screen.
- Focus
Test Signal : 1024x768@60Hz (T8/T9); 800x600@60Hz (S8)
Test Pattern : Text Pattern
* Adjust the center clearly, meanwhile, one slightly vague corner in the image is
allowed
Calibration in Factory Mode
(See Page 4-7 or Appendix for hotkeys)
After Main Board is changed or firmware is upgrade, the calibration is needed to
ensure good color performance.
- Video Calibration
Test Signal : HDTV Signal (720p) (Plug in HDTV signal cable into VGA port)
Test Pattern : Calibration Pattern (Figure 12)
- ADC Calibration (PC Calibration)
Test Signal : 1024x768@60Hz (T8/T9); 800x600@60Hz (S8)
Test Pattern : Calibration Pattern (Figure 13)
* Enter Factory Mode to execute PC Calibration.
Select "Frequency" function to adjust the total pixel number of pixel
clock in one line period.
Then select "Phase" function and use right or left arrow key to adjust the
value to minimize video flicker.
Get into Factory Mode to execute video calibration.
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S8 T8 T9