Download Print this page

Sanyo LCD-19R30 Service Manual page 8

Advertisement

4. Performance check
4.1 TV function check
Input RF signal. Open the user menu and first go to Channel menu, perform auto scan to check if
there is any program lost. Check speaker output normally and picture is displayed normally.
4.2 AV/SVIDEO/SCART input check
Respectively input signal through AV/SVIDEO/SCART, check if picture and sound are normal.
4.3 YPbPr/YCbCr input check
Respectively input all format YUV signal (shown at below table 3) by VG848 signal generator and
check picture display and sound are normal.
#
Resolution
1
712×484@59.94/60 Hz
2
702×574@50Hz
3
720×483p@59.94/60 Hz
4
720×576p@50 Hz
1280×720@50 Hz
5
1280×720p@59.94/60 Hz 44.96
6
7
1920×1080i@50Hz
8
1920×1080i@59.94/60 Hz 33.75
9
1920×1080p@23.98/24 Hz 27.00
10
1920×1080p@50Hz
11 1920×1080p@59.94/60 Hz 67.50
4.4 VGA input check
Respectively input all format VGA signal (shown at below table 4) by VG848 signal generator.
Check if the display and sound are normal. If picture has deviation in horizontal and vertical
direction, perform auto correction by making use of Setup menu/VGA Settings/Auto item.
#
Resolution
1
720×400@70 Hz 31.47
2
640×480@60 Hz 31.50
3
640×480@72 Hz 37.90
4
640×480@75 Hz 37.50
5
800×600@60 Hz 37.90
6
800×600@70 Hz 46.90
7
800×600@75 Hz 48.08
Table 3: Component (YUV) signal format
H-freq.
kHz
15.734
15.625
31.469
31.25
37.50
28.125
56.25
Table 4: PC signal format
H-freq.
V-freq.
kHz
70.08
60.00
72.00
75.00
60.00
72.19
75.00
V-freq.
Dot-clock freq.
Hz
59.94/60
13.50
50
13.50
59.94/60
27.00
50
27.00
50
74.25
59.94
74.18
50
74.25
59.94
74.25
23.98/24
74.25
50
148.50
60.00
148.50
Dot-clock freq.
Hz
MHz
28.32
25.18
31.50
31.50
40.00
49.50
50.00
6
Remarks
MHz
480i(59.94/60p)
576i/50
480p(59.94/60p)
576p/50
720p/50
720p(59.94/60p)
1080i/50
1080i(59.94/60i)
1080p(23.98/24p)
1080p/50
1080p(59.94/60p)
Remarks
DOS
VESA
VESA
VESA
VESA
VESA
VESA

Advertisement

loading