SERVICE MANUAL
Enter the TV to the Service mode. Select “SUB-BRIGHT” by pressing the
←
/
→
buttons on the
remote control
，
and set the data to 31 by pressing the data adjustment buttons. Operate the TV for 5
minutes in the mode.
d) Adjust the sub-bright data until blurry picture does not appear on the high bright area of the screen
and too dim picture not on the low-bright area.
e) Set the contrast and brightness to maximum or minimum, and then test normal picture alternation.
f) If the picture does not become dark when the contrast and brightness are set to minimum, or not
become bright when set to maximum, then adjust the sub-bright data to get normal picture.
2) White balance adjustment
a) Turn on the TV and preheat it for over 7 minutes.
b) Use the remote control to set the contrast to maximum and the brightness to medium. Set the
chroma to minimum.
c) Enter the TV to the Service mode, and set the following data without changing other items.
R-DRIVE············70
G-DRIVE············15
B-DRIVE············70
d) Pull out the external antenna and press the MUTE button once on the remote control until a right
horizontal line appears on the screen. Adjust the R-DRV data to get 160V±0.5 green gun voltage
across the CRT RGB PCB.
e) Adjust the G-DRV and B-DRV data according to Step 4 so that the bright horizontal line turns to
yellow
，
then to white.
3) Horizontal centering adjustment
Enter the TV to the Service mode and receive Philips pattern. Select “H.PH/60H” by pressing the
←
/
→
buttons on the remote control, and adjust horizontal picture position in the center of screen by
pressing the data adjustment buttons.
4) Vertical centering adjustment
Enter the TV to the Service mode and receive Philips pattern. Select “V.POS/60H” by pressing the
←
/
→
buttons on the remote control, and adjust vertical picture position in the center of screen by
pressing the data adjustment buttons.
5) Vertical amplitude adjustment
Enter the TV to the Service mode and receive cross hatch pattern. Select “V.SIZE/60H” by pressing
the
←
/
→
buttons on the remote control, and adjust vertical amplitude by pressing the data
adjustment buttons so that vertical amplitude is not enough. Continue to adjust vertical amplitude by
pressing the data adjustment button until the first bar on the cross hatch pattern touches edge of the
screen.
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