W monitorze CRT IIyama LS902UT Vision Master 1451 zlewa się ciemny kolor tła z jasnymi czcionkami, tak że czcionki stają się trudno czytelne - jeszcze w żadnym monitorze nie widziałem aż tak silnego najeżdżania koloru ciemnego tła na jasne czcionki jak w tym.
Szczególnie intensywne to jest odnośnie takich czcionek jak np. "w" czy "k" itp.
Wydaje sie, ze to przesuniecie koloru tla z czcionkami jest najbardziej intensywne w poziomie, a mniej w pionie. Tzn. np. w literze "z" najbardziej dotkniety problemem bedzie ukosnik "/" stanowiacy czesc tej litery.
Jednakze jakiegos wyraznego rozmycia koloru (np. wiecej czerwonego czy zielonego na krawedziach) nie widac. Po prostu ciemne tlo jakby nakladalo sie czesciowo na jasne czcionki czyniac je przez to niewyraznymi i trudno czytelnymi, co bardzo utrudnia czytanie np. stron WWW z takimi tlami.
Odwrotnie, to znaczy gdy tło jest jasne, a czcionki ciemne problemu takiego nie ma (tzn. problem pewnie istnieje, ale go nie widać w takim wypadku).
Czy da się to jakos wyregulowac?
Podaje z podrecznika serwisowego tego monitora fabryczne ustawienia OSD (pełny podrecznik jest tutaj: https://www.elektroda.pl/rtvforum/viewtopic.php?p=773143#773143 ):
4. ADJUSTMENT
4-1ADJUSTMENT CONDITIONS AND PRECAUTIONS
1. Approximately 30 minutes should be allowed for warm up before proceeding.
2. Adjustments should be undertaken only on those necessary elements since most of them have been carefully
preset at the factory.
4-2 MAIN ADJUSTMENTS
NO. FUNCTION LOCATION DESIGNATION
1. 62.5V ADJ PCB - MAIN VR902
2. B + ADJ PCB - MAIN VR902
3. SCREEN ADJ FLY BACK TRANS T402
4. FOCUS ADJ FLY BACK TRANS T402
5. ABL ADJ PCB - MAIN VR701
6. SUB-BRIGHTNESS ADJ PCB - MAIN VR702
7. SHUTTLE KNOB KEY-BOARD SW101
4-3 ADJUSTMENT METHOD
1. 14.5V, B + & HV voltage adjustment:
A. Chrome-2000 Signal generator or PC equivalent set mode 1, VGA 640X480 pattern 1.0 .
B. Connect a DC Volt meter between TP901 or D922 cathode and ground, then adjust VR901 to be 62.5VDC.
C. Connect a DC Volt meter with HV probe 1000: 1 between CRT Anode and ground, then adjust VR902 to
be 26.5 KV
D. Connect a DC Volt meter between TP701(G1) and ground, Brightness set to max. Then adjust VR702 to
be –40.0 VDC.
2. Factory preset Timings Adjustment:
A. Press MENU Key to show OSD window press Up or Down Key to switch the functional controls.
B. Press the Up Key to select the "ZOOM" function, then press the MENU Key. While do not release the
MENU Key until the OSD window changed to the Factory preset window.
C. The Factory preset window contains the following functional controls. Select one of the control. Then press
the Up/Down Key to adjust it's value for the optimum picture.
MENU Key to Quit the OSD window. Mean while the new setting data will be saved in the memory.
E. To switches the input signal to the other Timing Mode. Please follow step C ~ D to get the optimum picture.
F. Select the " " RETURN function and press the MENU Key, then the Factor Preset window will be
returned to the original OSD window.(user's operating condition)
G. The setting data of the CONTRAST, BRIGHTNESS, PIN-BALANCE, PARALLELOGRAM,
ROTATION, COLOR TEMPERATURE are common mode saved in the memory. Don't needed adjust it
individual at every timing Mode and save in the memory.
H Model select: for factory only, service engineer can't changed.
3. White Balance, Luminance adjustment:
A. Press OSD key for more than 10 minutesm enter factory preset pattern.
B. Set R, G, B gain DAC 70, R, G, B bias 10.
C. Raster Pattern, Brightness and Contrast set to maxinum, then adjust G-Bias ,B-Bias
,R-Bias and G2 to make the color temperature x=265±5, y= 290± 5, Y=4.0±0.5 cd/m2.
D. Adjust Brightness DAC to make the raster cut off (Y<1.4cd/m2).
E. Little white pattern, adjust R or G or B gain to make x=283±5, y=297±5, Y=120~210cd/m2 ,Then save to
9300K color temperature
F. Little white pattern, adjust R or G or B gain to make x=313±5, y=329±5, Y=120~210cd/m2 ,Then save to
6500K color temperature.
G. All white pattern, Brightness set to cut off and Contrast set to MAX, adjust VR701 to make
Y=105±10cd/m2.
H. After adjustment , CHECK white balance.
4. Focus Adjustment:
A. Set mode 7 1280 *1024 Fh:91.148KHz with character full page.
B. Adjust brightness to center and contrast to max.
C. Then adjust focus VR1 to a fine vertical line.
D. Adjust focus VR2 to a fine horizontal line.
E. Repeat step C & D..
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.
6. Convergence adjustment
A. Produce a magenta crosshatch on the display.
B. Adjust the focus for the best overall focus on the display.
Also adjust the brightness to the desired condition.
C. Vertical red and blue lines are converged by varying the angle between the two tabs of the 4 pole magnets
on the PCM assembly. (See above diagrams)
D. Horizontal red and blue lines are converged by varying the two tabs together, keeping the angle between
them constant.
E. Produce a white crosshatch pattern on the display.
F. Vertical green and magenta lines are converged by varying the angle between the two tabs of the 6-pole
magnets.
G. Horizontal green and magenta lines are converged by varying the two tabs together, keeping the angle
between them constant.
Szczególnie intensywne to jest odnośnie takich czcionek jak np. "w" czy "k" itp.
Wydaje sie, ze to przesuniecie koloru tla z czcionkami jest najbardziej intensywne w poziomie, a mniej w pionie. Tzn. np. w literze "z" najbardziej dotkniety problemem bedzie ukosnik "/" stanowiacy czesc tej litery.
Jednakze jakiegos wyraznego rozmycia koloru (np. wiecej czerwonego czy zielonego na krawedziach) nie widac. Po prostu ciemne tlo jakby nakladalo sie czesciowo na jasne czcionki czyniac je przez to niewyraznymi i trudno czytelnymi, co bardzo utrudnia czytanie np. stron WWW z takimi tlami.
Odwrotnie, to znaczy gdy tło jest jasne, a czcionki ciemne problemu takiego nie ma (tzn. problem pewnie istnieje, ale go nie widać w takim wypadku).
Czy da się to jakos wyregulowac?
Podaje z podrecznika serwisowego tego monitora fabryczne ustawienia OSD (pełny podrecznik jest tutaj: https://www.elektroda.pl/rtvforum/viewtopic.php?p=773143#773143 ):
4. ADJUSTMENT
4-1ADJUSTMENT CONDITIONS AND PRECAUTIONS
1. Approximately 30 minutes should be allowed for warm up before proceeding.
2. Adjustments should be undertaken only on those necessary elements since most of them have been carefully
preset at the factory.
4-2 MAIN ADJUSTMENTS
NO. FUNCTION LOCATION DESIGNATION
1. 62.5V ADJ PCB - MAIN VR902
2. B + ADJ PCB - MAIN VR902
3. SCREEN ADJ FLY BACK TRANS T402
4. FOCUS ADJ FLY BACK TRANS T402
5. ABL ADJ PCB - MAIN VR701
6. SUB-BRIGHTNESS ADJ PCB - MAIN VR702
7. SHUTTLE KNOB KEY-BOARD SW101
4-3 ADJUSTMENT METHOD
1. 14.5V, B + & HV voltage adjustment:
A. Chrome-2000 Signal generator or PC equivalent set mode 1, VGA 640X480 pattern 1.0 .
B. Connect a DC Volt meter between TP901 or D922 cathode and ground, then adjust VR901 to be 62.5VDC.
C. Connect a DC Volt meter with HV probe 1000: 1 between CRT Anode and ground, then adjust VR902 to
be 26.5 KV
D. Connect a DC Volt meter between TP701(G1) and ground, Brightness set to max. Then adjust VR702 to
be –40.0 VDC.
2. Factory preset Timings Adjustment:
A. Press MENU Key to show OSD window press Up or Down Key to switch the functional controls.
B. Press the Up Key to select the "ZOOM" function, then press the MENU Key. While do not release the
MENU Key until the OSD window changed to the Factory preset window.
C. The Factory preset window contains the following functional controls. Select one of the control. Then press
the Up/Down Key to adjust it's value for the optimum picture.
MENU Key to Quit the OSD window. Mean while the new setting data will be saved in the memory.
E. To switches the input signal to the other Timing Mode. Please follow step C ~ D to get the optimum picture.
F. Select the " " RETURN function and press the MENU Key, then the Factor Preset window will be
returned to the original OSD window.(user's operating condition)
G. The setting data of the CONTRAST, BRIGHTNESS, PIN-BALANCE, PARALLELOGRAM,
ROTATION, COLOR TEMPERATURE are common mode saved in the memory. Don't needed adjust it
individual at every timing Mode and save in the memory.
H Model select: for factory only, service engineer can't changed.
3. White Balance, Luminance adjustment:
A. Press OSD key for more than 10 minutesm enter factory preset pattern.
B. Set R, G, B gain DAC 70, R, G, B bias 10.
C. Raster Pattern, Brightness and Contrast set to maxinum, then adjust G-Bias ,B-Bias
,R-Bias and G2 to make the color temperature x=265±5, y= 290± 5, Y=4.0±0.5 cd/m2.
D. Adjust Brightness DAC to make the raster cut off (Y<1.4cd/m2).
E. Little white pattern, adjust R or G or B gain to make x=283±5, y=297±5, Y=120~210cd/m2 ,Then save to
9300K color temperature
F. Little white pattern, adjust R or G or B gain to make x=313±5, y=329±5, Y=120~210cd/m2 ,Then save to
6500K color temperature.
G. All white pattern, Brightness set to cut off and Contrast set to MAX, adjust VR701 to make
Y=105±10cd/m2.
H. After adjustment , CHECK white balance.
4. Focus Adjustment:
A. Set mode 7 1280 *1024 Fh:91.148KHz with character full page.
B. Adjust brightness to center and contrast to max.
C. Then adjust focus VR1 to a fine vertical line.
D. Adjust focus VR2 to a fine horizontal line.
E. Repeat step C & D..
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.
6. Convergence adjustment
A. Produce a magenta crosshatch on the display.
B. Adjust the focus for the best overall focus on the display.
Also adjust the brightness to the desired condition.
C. Vertical red and blue lines are converged by varying the angle between the two tabs of the 4 pole magnets
on the PCM assembly. (See above diagrams)
D. Horizontal red and blue lines are converged by varying the two tabs together, keeping the angle between
them constant.
E. Produce a white crosshatch pattern on the display.
F. Vertical green and magenta lines are converged by varying the angle between the two tabs of the 6-pole
magnets.
G. Horizontal green and magenta lines are converged by varying the two tabs together, keeping the angle
between them constant.
