Adjustments; Vcom Adjustment; Signal Level Adjustment; Rgb Level Adjustment - Sony VPL-S900U Service Manual

Enter the FACTORY MODE in the following manner:
How to enter the FACTORY MODE:
1. Check that the STATUS in the MENU is ON.
2. Turn OFF the MENU.
3. Press the keys ENTER → ENTER → LEFT → ENTER ,
in this order.
4. <Do you wish to enter into the FACTORY MODE ?>
appears.
5. Select YES.

3-1. VCOM ADJUSTMENT

1. Input the green single-color SVGA 1H inverted signal to
the INPUT A.
2. Set both CONTRAST and BRIGHT to 50.
3. The G VCOM adjustment screen of the Device Adjust
appears.
4. Select the point at which the flicker is minimum.
5. Input the red and blue single-color 1H inverted signal,
respectively, and adjust R VCOM and B VCOM so that
the flicker will be a minimum.
6. Save the adjusted value.
VPL-S900E, VPL-S900M, VPL-S900U
SECTION 3

ADJUSTMENTS

3-2. SIGNAL LEVEL ADJUSTMENT

γ MODE : GRAPHICS
INPUT A : SVGA 10 steps
VIDEO : NTSC 100% COLOR BAR
Set CONTRAST to 80 and BRIGHT to 50 (RESET).
W/B : HIGH mode

3-2-1. RGB Level Adjustment

1. Adjust M52337 R, G, and B GAIN, as well as M52337
R, G, and B BIAS, so that the levels of TP5106, TP5105,
and TP5104 will be within the specification.
2. Save the adjustment value.
RGB LEVEL specifications.
All of TP5106, TP5105, and TP5104
100 IRE 3.00 ± 0.02 Vdc

3-2-2. VIDEO Level Adjustment

1. COMPONENT VIDEO Adjustment
The Y/color difference signal of the COMPONENT input
must be adjusted using the following inputs signal.
Y = 0.7 V ped-100 IRE
R-Y/B-Y = 0.7 V p-p
1. Reduce the Color to MIN.
2. Connect the 15 k Component 100% color bar signal to
the INPUT A.
3. Adjust M52337 R, G and B GAIN and M52337 R, G and
B BIAS respectively until signal level at TP5106, TP5105
and TP5104 satisfies the specifications.
4. Save the adjustment value.
5. Return the Color to 50.
VIDEO LEVEL specifications
TP5014
0 IRE 2.00 ± 0.05 V dc
100 IRE 2.90 ± 0.05 Vdc
Do not touch the CXA1839 VIDEO CONT and YUV
CONT.
0 IRE 2.00 ± 0.02 Vdc
3-1