+B ADJUSTMENT
AC input voltage 230 + 5V(50Hz)
djust R954 to obtain +B voltage as below
Turns on the set and set the brightness
and contrast to Max.
95 +
0.5V
(Signal : Philips Pattern)
After 30 sec heat-run, check & adjust the
+B voltage +B voltage : C935 + side
GND : C935 - sid
VERTICAL CENTER ADJUSTMENT
Turns on the TV set & heat run about 5 min. Select the IIC control address No. 54.
Receive the circular pattern signal Set the horizontal center line to vertical center maker
AC 230 +
5V
of CRT by adjustment of IIC.
i.e.
VERTICAL SIZE ADJUSTMENT
Turns on the TV set & heat run about 5 min. Select the IIC control address No. 55.
Receive the circular pattern signal
djust IIC data to obtain the following condition.
Set all picture settings as below. i.e.
i.e.
Contrast : Ma
AC 230 + 1V
Picture Top : Inner circle reach the edge of TV raster.
Picture Bottom : Inner circle reach the edge of TV
Receive the NTSC circular signal, and check the
picture size after the above V-size adjustment.
If a> 0mm, go back to IIC control No. 54(V-center
adjustment) and increase the IIC data by 1 position.
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4.
3.
PREPARATION PROCEDURES
2.
3.
4.
1.
2.
1.
2.
1.
2.
3.
PREPARATION PROCEDURES
1.
1.
PREPARATION PROCEDURES
Measuring Points
1.
2.
3.
Vertical center
marker of CR
PAL
NTSC
……………………….
…………………………………..
a
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