Compaq MV7540 Service Manual page 11

(d) Put the probe in the middle of screen, Brightness
change to Raster pattern(No video)1024×768 @85Hz, set G-Bias
, R-Bias
10, Y=0.6±0.02FL
(e) Press up or down key to select cursor on 9300 icon and than press menu key for saved the bias
data to EEPROM.
B. 9300 and 6500 5500 color temperature window pattern(20% white field) adjustment:
(a) Set mode 1024×768 @ 85Hz Raster pattern.
(b) adjust Brightness , to make raster Luminance is 0.06 FL.
(c) Change mode to 1024×768 @ 85Hz window pattern(20% white field).put the probe in the middle of
screen ,Adjust G-Gain
y=297 ± 10, Y= 48±0.6FL.then save to 9300.(use up/down key select cursor on 9300 icon and than
press menu key)
(d) Adjust G-Gain
10, Y= 42±0.6FL.then save to 6500.
(e) Adjust G-Gain
10, Y= 42±0.6FL.then save to 5500.
C.Full white luminance(100% white field) for 9300:
(a) Set mode 1024×768 @ 85Hz full white field
(b) Adjust function key
D.Cut off adjustment:
(a) Set mode 1024×768 @85Hz Raster pattern.
(b) Adjust Brightness , to make Y= 0.06 FL.then return from factory OSD mode to user OSD mode.
4. Focus Adjustment:
A. Set mode 1024×768 @85Hz with crosshatch pattern.
B. Then adjust focus VR1 to a fine vertical line.
C. Adjust focus VR2 to a fine horizontal line.
D. Repeat step B & C. and change to full text pattern double check focus uniformity.
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,
which should be approximately 180'.
D. Check the complete blue and complete green patterns to observe their respective color purity. Make
minor adjustments if needed.
Relative Placement Of Typical Components
and FBT screen VR, to make the color temperature x= 260 ±10, y= 290 ±
, B-Gain
, B-Gain , R-Gain
, B-Gain , R-Gain
AB
to the luminance at 33 ± 0.3FL.
11
set to maximum. Contrast
, R-Gain , to make color temperature x=283±10,
, to make color temperature x=313±10, y=329±
, to make color temperature x=333±10, y=348±
Purity Magnets
6-pole Convergence Magnets
4-pole Convergence Magnets
Deflection Yoke
HP MV7540
set to max.
45,then adjust B-Bias