Iiyama Vision Master Pro 454 HM903DT Service Manual page 14

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1-16. BRIGHTNESS adjustment [PWB-MAIN]
1) Receive an entire white raster signal of MODE 5.
2) Apply a photometer to the screen center.
3) Adjust VR502 (ABL-ADJ) so that photometer reads 105±5cd/m
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1-17. SYNC SIGNAL INPUT confirmation
1) Receive a cross-hatch inverted signal of MODE 4.
2) Select composite and sync on green signal inputs respectively by the
signal generator.
3) Confirm that the picture is displayed normally.
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1-18. SIGNAL SELECT confirmation
1) Receive a cross-hatch inverted signal of MODE 5.
2) Switch the signal input to VIDEO IN 1 and VIDEO IN 2 respectively.
3) Press the Input Select Button (VIDEO 1/2) for approx. 5-6 seconds.
4) Confirm that the picture is displayed normally.
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1-19. POWER MANAGEMENT confirmation
1) Turn OFF the Power Switch and connect a digital wattage meter.
2) Turn ON the Power Switch.
3) Receive a cross-hatch inverted signal of MODE 5.
4) Turn OFF the R, G and B outputs on the signal generator.
5) Disconnect the H/HV and V cables.
6) Confirm that the input wattage is 3W or less and the Power Indicator turns
to orange.
7) Connect the H/HV and V cables and confirm that the picture appears.
8) Turn OFF the Power Switch and remove the digital wattage meter.
9) Turn ON the Power Switch.
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1-20. H-CONVERGENCE confirmation
1) Receive a cross-hatch inverted signal of MODE 5.
2) Select H-convergence or DA TEST 2, and press the MENU Button so that
the automatic confirmation program starts.
3) Confirm that the horizontal line is diverged.
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Brightness
VR502 ABL-ADJ