Adjustments - Sony SDM-N50 Service Manual

Connect the personal computer, monitor, and signal generator as shown below, and control the monitor.
• Preset mode adjustment
Confirm the screen by below three kinds of the modes
within preseted frequency.
Signal mode
1. MODE 0 (640X480 60Hz)
2. MODE 10 (800X600 75Hz)
3. MODE 17 (1024X768 75Hz)
(1) Input a cross hatch signal.
(2) Confirm both edges can see or white lines of edges are not
separating from indicated area edges.
Errors in the range of 2dot are permit.
Be saticefy one of both edges that is within above
specification.
• White balance adjustment
When no measuring instrument is used, compare the color
with the reference set so that the colors will be the same.
1. Adjustment of 9300°K
(1) Confirm every R/G/B_USER_BKG are initialized value.
(2) Receive MODE 15 (1024X768 60Hz) 80IRE.
Set COLOR to 9300°K. (COLOR_INDEX=1)
(3) Make adjustment with R/G_USR_DRV to set the
chromaticity within the specification.
y adjustment ..... Make adjustment with B_USR_DRV.
(Also x value changes simultaneous)
B_USR_DRV UP
B_USR_DRV DOWN
x adjustment ..... Make adjustment with R_USR_DRV.
R_USR_DRV UP
R_USR_DRV DOWN
Adjust again and bring down G_USR_DRV 10 STEP to
become within the specification ; however, in case of
adjustment range of y value become deficientlly and when
B_USR_DRV=255.
(4) Make the signal 30IRE all white to check that it is within the
specification.
(5) Adjust R/B_USER_BKG to become within the specification
when (4) deviates the specification.
(6) Input a grayscale and perform picture quality confirmation.
SECTION 3

ADJUSTMENTS

Computer for jig
TO CN107 CONNECTOR (A Board)
* Maintain the Aging mode for over 30 minutes.
Values x and y decrease.
Values x and y increase.
Value y increases.
Value y decreases.
Signal generator
(VG-823, etc.)
TO
INPUT-1
(7) Perform color save ( select C with ALT+M ).
Spec: 9300°K 80IRE (x, y) = (0.285, 0.294)
9300°K 30IRE (x, y) = (0.265, 0.268)
Note: Make adjustment up to ±0.002.
2. Adjustment of 6500°K
(1) Confirm every R/G/B_USER_BKG are initialized value.
(2) Receive MODE 15 (1024X768 60Hz) 80IRE.
Set COLOR to 6500°K. (COLOR_INDEX=2)
(3) Make adjustment with R/G_USR_DRV to set the chromaticity
within the specification.
y adjustment ..... Make adjustment with B_USR_DRV.
(Also x value changes simultaneous)
B_USR_DRV UP
B_USR_DRV DOWN
x adjustment ..... Make adjustment with R_USR_DRV.
R_USR_DRV UP
R_USR_DRV DOWN
Adjust again and bring down G_USR_DRV 10 STEP to
become within the specification ; however, in case of
adjustment range of y value become deficientlly and when
B_USR_DRV=255.
(4) Make the signal 30IRE all white to check that it is within the
specification.
(5) Adjust R/B_USER_BKG to become within the specification
when (4) deviates the specification.
(6) Input a grayscale and perform picture quality confirmation.
(7) Perform color save ( select C with ALT+M ).
Spec: 6500°K 80IRE (x, y) = (0.314, 0.324)
6500°K 30IRE (x, y) = (0.295, 0.305)
Note: Make adjustment up to ±0.002.
3-1
SDM-N50
Within 3JND
Within 4JND
Values x and y decrease.
Values x and y increase.
Value y increases.
Value y decreases.
Within 3JND
Within 4JND