Inspection Procedure - ViewSonic PJ755D - 2600 Lumens DLP Projector Service Manual

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Inspection Procedure

- Elevator Function
1. Please check and ensure the function of elevator is work as well.
2. If not, please return the unit to repair area.
- Keypad Function (Including Remote Control)
1. Please check and ensure the control function of keypad is work as well.
2. If not, please return the unit to repair area.
- Clock and Clock phase
Test Signal:1024 x 768 @ 75Hz
Test Pattern:Fine Line Moire Pattern
1. Check and see If image sharpness and focus in well performed.
2. If not, readjust by following steps.
(a) Enter Image-I, and then select "Frequency" function to adjust the total pixel number
(b) Then select "phase" function and use right or left button to adjust the value to minimize
- R, G, B and white color contrast
Test Signal:1024 x 768 @ 75Hz
Test Pattern:64 RGBW scale pattern
1. Please check and ensure if each color is normal and distinguishable.
2. If not, please return the unit to repair area.
- Screen Uniformity
Test Signal:1024 x 768 @ 75Hz
Test Pattern:Full white pattern
1. Please check and ensure the unit is under the spec. (60% Minimum)
2. If not, please return the unit to repair area.
- Dead pixel (Bright pixel)
Test Signal:1024 x 768 @ 75Hz
Test Pattern:Full black pattern
1. Please check and ensure the unit is under the spec.
2. If not, please return the unit to repair area.
ViewSonic Corporation
of pixel clock in one line period.
video flicker.
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PJ755D