Auto Convergence Offset; White Balance Adjustment; Sub Bright Adjustment; Sub Color Adjustment - Sony KP-44PX2 Service Manual

3. Red Adjustment
1) Place a cap on the blue lens so that green and red colors
are displayed.
2) Press "3" button on the commander to select RED mode.
3) Hereinafter, use same manner as that of blue adjustment to
adjust so that the red lines overlap with green lines.
4. Registration Data Writing
1) After each adjustment of green, blue, and red for the
PAL-Wide mode finished, press "
"0" buttons on the commander to write registration data to
the NVM.
<Copy of All Registration Data>
1. Make sure that the adjustment for PAL-Wide mode is
finished and the data has been written.
2. Select the Projector Engine mode.
3. Select ALCP and set the data to "01", and press
" (MUTE)"+"-" buttons on the commander.
4. The data of PAL-Wide mode is copied to NTSC-Wide mode.
PAL
Wide
NTSC
Wide
Zoom
14 : 9
Smart

6-3. AUTO CONVERGENCE OFFSET

This adjustment must be performed after the registration adjustment
was made or after readjustment was made by any reason.
1. Darken the periphery of this set.
2. Enter the PAL SPCB signal to set the PAL mode.
3. Set the screen format to "Wide".
4. Select the Projector Engine mode.
5. Press " (AUTO CONVERGENCE)" button on the
front panel of the set.
(The offset value is now automatically stored)
6. Select "62 ERR" of Projector Engine mode.
Confirm ERR is "00". If ERR is not "00", recheck. (Refer to 6-7.)
7. Exit the TT mode.
8. Enter the NTSC monoscope signal, and perform the same
steps in the NTSC-Wide mode respectively.
(MUTE)"+
Copy Registration Data.
– 31 –

6-4. WHITE BALANCE ADJUSTMENT

1. Enter the monoscope signal.
2. Press "MENU" button on the commander to enter the
Picture Adjustment menu.
3. Set the Picture Mode to "Personal", and the screen
format to "Wide".
4. Enter the Service menu (See Page 23), and select "Service".
5. Adjust "Sub Bright" so that 10 IRE section barely glows.
6. Enter all-white pattern signal.
7. Fix "G-Cutoff" to "31", and adjust "R-Cutoff" and
"B-Cutoff" so as to attain the optimum white balance.
Condition: All-White Pattern 20 IRE
8. Adjust "Sub Bright" so that 100 IRE section barely glows.
9. Adjust "R-Drive" and "B-Drive" so as to attain the
optimum white balance.
10. Repeatedly adjust the white balance for the minimum and
maximum picture setting.

6-5. SUB BRIGHT ADJUSTMENT

1. Enter the monoscope signal.
2. Press "MENU" button on the commander to enter the Picture
Adjustment menu.
3. Set respective items as follows:
• Picture Mode B Personal
• Contrast B Minimum
• Brightness B 50%
4. Enter the Service menu (See Page 23), and select "Service".
5. Adjust "Sub Bright" so that the border between 0 IRE and
10 IRE becomes distinct.
6. Add +6 step offset.

6-6. SUB COLOR ADJUSTMENT

1. Enter the color bar signal.
2. Connect the oscilloscope probe to the CN7001 pin 5 on the A
board.
3. Enter the Service menu (See Page 23).
4. Select "Service".
5. Adjust "Sub Col" until Cyan, Magenta and Blue colour bars
are of equal height as indicated below.
a
KP-44PX2/44PX2U
RM-938
Same level
c b