JVC DT-V1710CG Service Manual page 70

BRIGHTNESS ADJUSTMENTS (SDTV)
Measuring Instruments
Card (Slot)
Test Points
Adjustment Points
Notes:
•
Perform the following adjustment after completing the 1080/60i Brightness
Adjustment.
•
Set the PICTURE SUB ADJ. data in the Setup Menu to "00".
•
The SR value (see the description for the HDTV Brightness adjustment)
becomes the reference value for the following adjustments. When this data
is changed, it is required to re-adjust the data of all of the adjustment signals
(HDTV, SDTV and NTSC/PAL). When re-adjusting the 1080/60i signal, use
the SI.
•
When overscan data of a signal is changed, it is required to re-adjust the
underscan data of the same adjustment signal.
•
When the 4:3 data of a signal is changed, it is required to re-adjust the 16:9
data of the same adjustment signal.
•
After completing the brightness adjustments, make sure that the Low-Light
is not deviated. If it is, it is required to perform the Low-Light adjustment
again.
<White Balance HIGH: D9300>
(1) Apply the 480/60i component gray scale signal to INPUT A.
(2) Set "COLOR TEMP." of COLOR TEMP./BAL. in the Setup
Menu to HIGH.
(3) Set the PHASE, CHROMA, BRIGHT and CONTRAST
potentiometers on the front panel to the center click positions.
(4) Adjust SE02 in the Service Menu so that the 0% black area
in the gray scale signal lights up slightly. (Be sure to avoid
degradation of the black color.)
(5) Set the ASPECT button on the front panel to ON so that the
scanning size is 16:9.
(6) Adjust SQ26 so that the 0% black area in the gray scale
signal lights slightly. (Be sure to avoid degradation of the
black color.)
(7) Set the ASPECT button on the front panel to OFF and the
UNDER SCAN button to ON to set the scanning size to
underscanning for the 4:3 ratio.
(8) Adjust SP14 so that the 0% black area in the gray scale
signal lights up slightly. (Be sure to avoid degradation of the
black color.)
(9) Set the ASPECT button on the front panel to ON to set the
scanning size to underscanning for the 16:9 ratio.
(10) Adjust SQ29 so that the 0% black area in the gray scale
signal lights slightly. (Be sure to avoid degradation of the
black color.)
(11) Set the ASPECT and UNDER SCAN buttons on the front
panel to OFF.
Adjustment
Overscan
Signal
4 : 3
480/60i SE02
576/50i SF02
480/60p SG02
576/50p SH02
1-70 (No. 52152)
Signal generator (Gray scale signal)
Component/RGB Input Card (Slot 1)
S*02 (4:3 Overscan Bright High), S*06 (4:3 Overscan Bright Low),
SP** (4:3 Underscan Bright High/Low),
SQ** (16:9 Overscan/Underscan Bright High/Low) [Service Menu]
White Balance HIGH
Underscan
16 : 9 4 : 3
SQ26 SP14
SQ32 SP17
SQ38 SP20
SQ44 SP23
<White Balance LOW: D65>
(12) Set "COLOR TEMP." of COLOR TEMP./BAL. in the Setup
Menu to LOW.
(13) Adjust SE06 so that the 0% black area in the gray scale
signal lights slightly. (Be sure to avoid degradation of the
black color.)
(14) Set the ASPECT button on the front panel to ON so that the
scanning size is 16:9.
(15) Adjust SQ27 so that the 0% black area in the gray scale
signal lights slightly. (Be sure to avoid degradation of the
black color.)
(16) Set the ASPECT button on the front panel to OFF and the
UNDER SCAN button to ON to set the scanning size to
underscanning for the 4:3 ratio.
(17) Adjust SP15 so that the 0% black area in the gray scale
signal lights slightly. (Be sure to avoid degradation of the
black color.)
(18) Set the ASPECT button on the front panel to ON to set the
scanning size to underscanning for the 16:9 ratio.
(19) Adjust SQ30 so that the 0% black area in the gray scale
signal lights slightly. (Be sure to avoid degradation of the
black color.)
(20) Set the ASPECT and UNDER SCAN buttons on the front
panel to OFF.
(21) Vary the adjustment signal and adjustment data, and re-
perform adjustments in steps 1 to 20 above (see Table 22).
Overscan
16 : 9 4 : 3
SQ29 SE06
SQ35 SF06
SQ41 SG06
SQ47 SH06
Table 22
0 2 4 6 8 10 1214 0 2 4 6 8 10 1214
% %
0% Black area
White Balance LOW
Underscan
16 : 9 4 : 3
SQ27 SP15
SQ33 SP18
SQ39 SP21
SQ45 SP24
%
16 : 9
SQ30
SQ36
SQ42
SQ48