Sharp LC-M3700 (serv.man7) Service Manual ▷ View online
21
LC-M3700
LC-M3710
LC-M3710
4) N358 signal adjustment
Adjustment item
Adjustment condition
Adjusting method
Signal input
Using a signal generator, feed NTSC3.58 split field
color bars (containing 100% white and having color
saturation of 75%) to the video signal input terminal
of INPUT1 or INPUT2.
color bars (containing 100% white and having color
saturation of 75%) to the video signal input terminal
of INPUT1 or INPUT2.
1
Setting
Set the color system to N358.
2
page 5
N358 Y GAIN
N358 Y GAIN
MAIN N358 Y gain
adjustment
adjustment
Using pin (1) of P802, adjust the gain to
0.70±0.025Vp-p.
0.70±0.025Vp-p.
3
N358 CB GAIN
MAIN N358 color
density adjustment
density adjustment
Using pin (3) of P802, make adjustment so that the
interval indicated in the figure below becomes
0.53±0.025Vp-p.
interval indicated in the figure below becomes
0.53±0.025Vp-p.
0.53Vp-p
0.53Vp-p
4
N358 CR GAIN
MAIN N358 Cr level
adjustment
adjustment
Using pin (5) of P802, make adjustment so that the
interval indicated in the figure below becomes
0.53±0.025Vp-p.
interval indicated in the figure below becomes
0.53±0.025Vp-p.
5
N358 TINT
MAIN N358 TINT
adjustment
adjustment
Using the TB124_MAIN output (P802-3pin), make
adjustment so that the bottoms of waveforms are
aligned as shown in the figure below.
adjustment so that the bottoms of waveforms are
aligned as shown in the figure below.
Should be aligned like this.
0.53Vp-p
4
MAIN SECAM Cr level
SECAM CR GAIN
adjustment
3) SECAM signal adjustment
Adjustment item
Adjustment condition
Adjusting method
Using pin (5) of P802, make adjustment so that the
interval indicated in the figure below becomes
0.53±0.025Vp-p.
interval indicated in the figure below becomes
0.53±0.025Vp-p.
22
LC-M3700
LC-M3710
LC-M3710
Adjustment item
Adjustment condition
Adjusting method
Signal input
1
Setting
Using a signal generator, feed component 33K
(HDTV1080i) full field color bars (containing 100%
white and having color saturation of 100%) to the
component video signal input terminal of INPUT3.
(HDTV1080i) full field color bars (containing 100%
white and having color saturation of 100%) to the
component video signal input terminal of INPUT3.
Set to component 33kHz.
6) Component HDTV signal adjustment
2
MAIN component HDTV Page 6
CONTRAST adjustment
CONTRAST adjustment
COMP HD CONTRAST
Using IC8805 (TP8805), adjust the 100% white to
0.90±0.025Vp-p above the pedestal.
0.90±0.025Vp-p above the pedestal.
Adjustment item
Adjustment condition
Adjusting method
Signal input
1
Setting
Using a signal generator, feed component 15K full
field color bars (containing 100% white and having
color saturation of 100%) to the component video
signal input terminal of INPUT3.
field color bars (containing 100% white and having
color saturation of 100%) to the component video
signal input terminal of INPUT3.
et to component 15kHz.
5) Component 15kHz signal adjustment
2
MAIN component 15K
Page 6
CONTRAST adjustment
COMP 15k (CONTRAST)
Using IC8805 (TP8805), adjust the contrast to
0.90±0.025Vp-p.
0.90±0.025Vp-p.
23
LC-M3700
LC-M3710
LC-M3710
2. Analog adjustment
1) N358 white balance adjustment
1) N358 white balance adjustment
Adjustment item
Adjustment condition
Adjusting method
Signal input
Using a signal generator, feed NTSC signal window
patterns (in-window 20IRE) to the video input
terminal of INPUT1.
patterns (in-window 20IRE) to the video input
terminal of INPUT1.
After performing steps 1 to 3 and 6 to 8, repeat adjustment so that the color becomes brightest for both 20IRE and 80IRE.
20IRE
1
Setting
2
R CUTOFF adjustment
Page7
N358 R CUTOFF
N358 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
N358 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
N358 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
Set the window white level of the window pattern
from the signal generator to 80IRE.
from the signal generator to 80IRE.
80IRE
6
R DRIVE adjustment
N358 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
N358 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
N358 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 color system to N358.
24
LC-M3700
LC-M3710
LC-M3710
2) PAL white balance adjustment
Adjustment item
Adjustment condition
Adjusting method
Signal input
Using a signal generator, feed NTSC signal window
patterns (in-window 20IRE) to the video input
terminal of INPUT1.
patterns (in-window 20IRE) to the video input
terminal of INPUT1.
20IRE
1
Setting
2
R CUTOFF adjustment
Page8
PAL R CUTOFF
PAL 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
PAL 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
PAL 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 ion-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
PAL 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
PAL 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
PAL 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 color system to PAL.
After performing steps 1 to 3 and 6 to 8, repeat adjustment so that the color becomes brightest for both 20IRE and 80IRE.
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