ViewSonic N2750w-2G, Service Manual

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E. Confirm that the distance between the SENSOR of CA110 color temperature
meter and the central point of the machine is 20cm.
COLOR TEMPERATURE OSD
Fig.3 Fig.4
When in the 16 gray-scale screen, the cursor will point to “WHITE BALANCE”, as shown in
Fig.3. Press “ENTER” key to start temperature adjustment automatically, as shown in Fig.4.
After “WHITE BALANCE” disappears, the performing of “WHITE BALANCE” is
completed.After the adjustment is done, switch to an all-white screen to confirm the
chromaticity coordinate value.
Preset color for N2750w (2G)
Normal ---- 9300 x=0.285
±
0.015 y=0.293
±
0.015
Warm ---- 6500 x=0.313
±
0.015 y=0.329
±
0.015
COOL ----- 12000 x=0.271
±
0.015 y=0.278
±
0.015
1.4.3 COLOR TEMPERATURE ADJUSTING
HD MODE:
A. Timing: PAL OR NTSC
B. Pattern: Color bar
When in the color bar screen, the cursor will point to “WHITE BALANCE”, as shown in
Fig.3. After “WHITE BALANCE” disappears, the performing of “WHITE BALANCE” is
completed.
Normal ---- 9300 x=0.285
±
0.015 y=0.293
±
0.015
Warm ---- 6500 x=0.313
±
0.015 y=0.329
±
0.015
COOL ----- 12000 x=0.271
±
0.015 y=0.278
±
0.015
1.4.4 POWER SAVING TEST
A. Timing: 640
×
480 @ 75Hz
B. Pattern: TEST-TTL/ECL
C. Set BRIGHTNESS and CONTRAST to the maximum
D. The power dissipation for each mode is as follows
MODE Maximum Power
Dissipation
POWER LED COLOR
NORMAL <150W GREEN
Standby < 5 W Orange
OFF < 5 W Orange
1.4.5 Confirm HDMI MODE TIMING
A. In DVI MODE, switch TIMING according to the FACTORY PRESET TIMING
TABLE, and confirm that the screen is normal
B. Confirm that the four TIMING screens of 408i, 480P, 720P, and 1080i are normal
C. Confirm that HDMI DVD functions normally
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Confidential - Do Not Copy
N
27
50w-
2G
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