Iiyama AS3921U, Service Manual

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2-1. Automatic RGB GAIN and BIAS adjustment
1) Receive an entire black raster signal of fH 27.000 kHz. (H/V sync polarity: N)
2) Confirm the Power Indicator turns to orange.
3) Confirm that the Power Indicator turns to green when the adjustment is completed.
4) Receive an entire white raster signal of fH 27.000 kHz. (H/V sync polarity: P)
5) Confirm the Power Indicator turns to orange.
6) Confirm that the Power Indicator turns to green when the adjustment is completed.
6) Turn OFF the Power Switch and turn it ON again under the User Mode.
6) Select Reset and press the Menu Button, and select Yes and press the Menu Button.
G
PROCEDURE
1. To make the lock out facility available
1) Turn ON the Power Switch while pressing the Menu Button, and then turn OFF the Power Switch.
2) Turn ON the Power Switch again while pressing the + Button, and then turn OFF the Power Switch.
3) Turn ON the Power Switch again while pressing the - Button.
2. To cancel the lock out facility
1) Turn OFF the Power Switch.
2) Turn ON the Power Switch while pressing the Menu, - and + Buttons at the same time so that the lock
out facility is canceled.
LOCK OUT FACILITY
User adjustable items can be restricted to OSD Position and Language by setting the lock out facility.