In The Case Of Decrease In Luminance - Sony SRX-R320 Service Manual

1-16-2. In the Case of Decrease in Luminance

The following is the procedure for identifying the cause of decrease in luminance.
Required equipment/tool
. Laser distance meter
. Illuminance meter
. Luminance meter
. String (capable of measuring the length longer than the screen width)
. SRX Controller (γ, CSC adjustment)
. 3D glasses (in the case of 3D)
. Air blower
. Cleaning cloth
. Cloth
Procedure
1. Check the lamp. (Refer to step 1 in Section 1-16-1.)
Make sure that there is no backlash in the anode holder when the lamp is loaded.
2. Check the lamp input. (Refer to step 2 in Section 1-16-1.)
3. Check the lamp optical axis adjustment. (Refer to step 3 in Section 1-16-1.)
4. Determine the measuring point of luminance. (Refer to step 5 in Section 1-16-1.)
5. Determine the measuring point of luminance. (Refer to step 6 in Section 1-16-1.)
6. Clean the optical system. (Refer to Section 1-15.)
7. Perform the illumination range adjustment. (Refer to Section 2-4.)
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Perform the adjustment with the lamp power of 50%.
8. Perform theγ adjustment. (Refer to Technical Manual.)
9. Perform the CSC adjustment. (Refer to Installation Manual.)
10. Measure the luminance.
Perform the measurement of luminance in the following conditions.
. Lamp:
New lamp of 30 hours or less lighting time
. Lamp power:
100%
. Measuring point: Points determined in steps 4 and 5 of Section 1-16-1
. Measuring pattern: gray10 (screen center)
. Pre-aging:
Perform measurement after leaving it for more than 15 minutes after lighting up.
. Measuring device: CS100, etc.
. Compare the initial luminance with the measurement results in step 10 of Section 1-16-1 (measuring
point is in step 4) .
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The probable causes of the difference between the initial luminance and the luminance measurement
results are the variation in lamp and the measurement error. When the difference is 15% or more,
contact your local Sony Sales Offi ce/Service Center.
SRX-R320
1-81 (E)