Sharp LC-M3700 (serv.man7) Service Manual ▷ View online
25
LC-M3700
LC-M3710
LC-M3710
3) Component 15K white balance adjustment
Adjustment item
Adjustment condition
Adjusting method
Signal input
Using a signal generator, feed component 15K signal
(525i) window patterns (in-window 20IRE) to the
video input terminal of INPUT3. Y input only is
sufficient.
(525i) window patterns (in-window 20IRE) to the
video input terminal of INPUT3. Y input only is
sufficient.
20IRE
1
Setting
2
R CUTOFF adjustment
Page9
COMP 15k R CUTOFF
COMP 15k R CUTOFF
1. On the R CUTOFF item, press the ENTER key to
display the special gamma.
2. Adjust the value so that the color in the window
becomes brightest.
3
G CUTOFF adjustment
COMP 15k G CUTOFF
1. On the G CUTOFF item, press the ENTER key to
display the special gamma.
2. Adjust the value so that the color in the window
becomes brightest.
4
B CUTOFF adjustment
COMP 15k B CUTOFF
1. On the B CUTOFF item, press the ENTER key to
display the special gamma.
2. Adjust the value so that the color in the window
becomes brightest.
5
Setting
Change the in-window white level of the window
pattern from the signal generator to 80IRE.
pattern from the signal generator to 80IRE.
80IRE
6
R DRIVE adjustment
COMP 15k R DRIVE
1. On the R DRIVE item, press the ENTER key to
display the special gamma.
2. Adjust the value so that the color in the window
becomes brightest.
7
G DRIVE adjustment
COMP 15k G DRIVE
1. On the G DRIVE item, press the ENTER key to
display the special gamma.
2. Adjust the value so that the color in the window
becomes brightest.
8
B DRIVE adjustment
COMP 15k B DRIVE
1. On the B DRIVE item, press the ENTER key to
display the special gamma.
2. Adjust the value so that the color in the window
becomes brightest.
9
Setting
On the item, press the ENTER key again to make the
special gamma disappear.
special gamma disappear.
Set the input to INPUT3 component.
After performing steps 1 to 3 and 6 to 8, repeat adjustment so that the color becomes brightest for both 20IRE and 80IRE.
26
LC-M3700
LC-M3710
LC-M3710
4) Component 33K white balance adjustment
Adjustment item
Adjustment condition
Adjusting method
Signal input
Using a signal generator, feed component 33K signal
(1080i) window patterns (in-window 20IRE) to the
video input terminal of INPUT3. Y input only is
sufficient.
(1080i) window patterns (in-window 20IRE) to the
video input terminal of INPUT3. Y input only is
sufficient.
20IRE
1
Setting
2
R CUTOFF adjustment
Page10
COMP HDTV R CUTOFF
COMP HDTV R CUTOFF
1. On the R CUTOFF item, press the ENTER key to
display the special gamma.
2. Adjust the value so that the color in the window
becomes brightest.
3
G CUTOFF adjustment
COMP HDTV G CUTOFF
1. On the G CUTOFF item, press the ENTER key to
display the special gamma.
2. Adjust the value so that the color in the window
becomes brightest.
4
B CUTOFF adjustment
COMP HDTV B CUTOFF
1. On the B CUTOFF item, press the ENTER key to
display the special gamma.
2. Adjust the value so that the color in the window
becomes brightest.
5
Setting
Change the in-window white level of the window
pattern from the signal generator to 80IRE.
pattern from the signal generator to 80IRE.
80IRE
6
R DRIVE adjustment
COMP HDTV R DRIVE
1. On the R DRIVE item, press the ENTER key to
display the special gamma.
2. Adjust the value so that the color in the window
becomes brightest.
7
G DRIVE adjustment
COMP HDTV G DRIVE
1. On the G DRIVE item, press the ENTER key to
display the special gamma.
2. Adjust the value so that the color in the window
becomes brightest.
8
B DRIVE adjustment
COMP HDTV B DRIVE
1. On the B DRIVE item, press the ENTER key to
display the special gamma.
2. Adjust the value so that the color in the window
becomes brightest.
9
Setting
On the item, press the ENTER key again to make the
special gamma disappear.
special gamma disappear.
Set the input to INPUT3 component.
After performing steps 1 to 3 and 6 to 8, repeat adjustment so that the color becomes brightest for both 20IRE and 80IRE.
27
LC-M3700
LC-M3710
LC-M3710
3. Monitor section adjustment
Analog adjustment
1) Voltage adjustment
Analog adjustment
1) Voltage adjustment
Adjustment item
Adjustment condition
Adjusting method
1
Setting
Using a signal generator, feed NTSC signal color
bars to the video input terminal of INPUT1.
bars to the video input terminal of INPUT1.
1. Set the input to INPUT1.
2. Enter the process adjustment mode, set the
2. Enter the process adjustment mode, set the
KOUTEI CHANGR item on Page 1 to MONITOR
with the VOL key and press the ENTER key.
with the VOL key and press the ENTER key.
3. The monitor process adjustment mode is
established.
2
VLS BIAS adjustment
Monitor process
adjustment mode
Page2
adjustment mode
Page2
Connect a digital voltmeter to TL4103 (A-side) or
TL4103 (B-side) and adjust the VLS bias to
15.00V±0.05V.
TL4103 (B-side) and adjust the VLS bias to
15.00V±0.05V.
3
GRAY LEVEL
Monitor process
adjustment
adjustment mode
Page2
Page2
Connect a digital voltmeter to TL4102 (A-side) or
TL4101 (B-side) and adjust the gray level to
14.50V±0.05V.
TL4101 (B-side) and adjust the gray level to
14.50V±0.05V.
4
COM BIAS adjustment
Monitor process
adjustment mode
Page2
adjustment mode
Page2
1. On the COM BIAS item, press the ENTER key to
display the adjustment pattern.
2. Set the value so that the flicker near the center of
the screen is minimized.
3. Press the ENTER key to make the pattern
disappear.
28
LC-M3700
LC-M3710
LC-M3710
2) Monitor white balance adjustment (15k)
~
All the video adjustments on the MAIN side should be completed before making this adjustment.
Adjustment item
Adjustment condition
Adjusting method
Signal input
1
Setting
Using a signal generator, feed composite signal
(NTSC) raster patterns (20IRE) to the video input
terminal of INPUT1.
(NTSC) raster patterns (20IRE) to the video input
terminal of INPUT1.
1. [Video Adjustment]-[Reset] execution
2. [Energy-Saving Setting]-Brightness [+8]
3. [Video Adjustment]-[Pro Setting]-[Color
2. [Energy-Saving Setting]-Brightness [+8]
3. [Video Adjustment]-[Pro Setting]-[Color
Temperature]-Middle
4. [Video Adjustment]-[Pro Setting]-[Black Extension]-
OFF
2
Adjustment
Page14
Using a color meter, adjust R GAMMA 15K (LO) and
B GAMMA 15K (LO) to x=0.287, y=0.285±0.0035
(Measure the central part of the screen.)
B GAMMA 15K (LO) to x=0.287, y=0.285±0.0035
(Measure the central part of the screen.)
3
Setting
Using a signal generator, feed composite signal
(NTSC) raster patterns (80IRE) to the video input
terminal of INPUT1.
(NTSC) raster patterns (80IRE) to the video input
terminal of INPUT1.
4
Adjustment
Page14
Using a color meter, adjust R GAMMA 15K (HI) and
B GAMMA 15K (HI) to x=0.287, y=0.285±0.0015
(Measure the central part of the screen.)
B GAMMA 15K (HI) to x=0.287, y=0.285±0.0015
(Measure the central part of the screen.)
20IRE
80IRE
5
Adjustment
Page14
Change the WRITE GAMMA 15K item from OFF to
ON with the VOL key and press the ENTER key.
(Execution of writing of the adjusted values.)
ON with the VOL key and press the ENTER key.
(Execution of writing of the adjusted values.)
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