Philips 109B7 Service Manual page 15

19" CDT Color Monitor
the menu Key to enter second menu, press the menu key about 10S,then enter into factory setting area for
modulation.
B. Set brightness and contrast ratio max.
C. Raster max modulate, Raster Pattern, adjust R-bias or B-bias and G-bias, make x= 270,y=290,Y=1.8±0.2
2
cd/m .
D. Raster cut off modulate: Raster Pattern, adjust brightness and cut off: 0.08 cd/m
6500K and 5500K color temperature.
E. Small white screen appears (9300 color temperature). Raster cut off, SB select four, Contrast =100,adjust
R or G or B gain, make x=283,y=297,Y=340,and save it into 9300K color temperature; LH select 3,adjust
Contrast, and make Y=270,save it into 9300 color temperature, LH select 2,adjust contrast, make Y=200
and save it into 9300 color temperature; LH select 1,adjust contrast, make Y=140 and save it into 9300
color temperature; then exit factory setting area.
F. Small white screen appears (6500 color temperature). LH select 4,contrast –100,adjust R or G or B gain,
make x=313,y=329,Y=300 and save it into 6500 color temperature; then exit factory setting area.
G. Small white screen appears (5500K color temperature). LH select 4,contrast –100,adjust R or G or B gain,
make x=332,y=347,Y=280 and save it into 5500 color temperature; then exit factory setting area.
H. ABL modulates. Full white screen appears (9300K color temperature), brightness cut off, adjust AB value:
1) LH select 4,adjust AB value and make 9300 color temperature Y=99 cd/m
value and make 9300 color temperature Y=99 cd/m
temperature Y=99 cd/m
I. SRGB color temperature. Full white screen appears, adjust R or G or B gain, make x=313,y=329,Y=80
2
cd/m , then save it into SRGB color temperature.
J. After modulation, it's necessary to check if the white balance accords with the normal specification. If not,
which needs reset.
4. Focus Adjustment:
A. Set mode5 1024×768@85Hz with character full page.
B. Under the "recall" state.
C. Then adjust focus VR1 of the FBT to a fine vertical line.
D. Adjust focus VR2 to a fine horizontal line.
E. Repeat step C & D.then rivet the focus VR, G2 VR.
5. Purity Adjustment
A. Be sure that the display is not being exposed to any external magnetic fields.
B. Ensure that the spacing between the Purity, Convergence, Magnet, (PCM), assembly and the CRT stem is
29mm. (See below diagram)
C. Produce a complete, red pattern on the display. Adjust the purity magnet rings on the PCM assembly to
obtain a complete field of the color red. This is done by moving the two tabs in such a manner that they
advance in an opposite direction but at the same time to obtain the same angle between the two tabs,
2
.4) LH select 1,adjust AB value and make 9300 color temperature Y=99 cd/m
2
.3) LH select 2,adjust AB value and make 9300 color
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109B7
2
, and save it into 9300K,
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.2) LH select 3,adjust AB
2
.