XOCECO LC17H3S, Руководство по обслуживанию

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Input signal separately to TV/SCART/AV/S terminal, connect AUDIO/VIDEO OUT
terminal to monitor, check the output sound of AUDIO OUT is normal, and output
picture of VIDEO OUT is normal. (LC-20H3 S/20H4 S)
3.4 SCART connector
3.4.1 Inspection of connector content of SCART OUTPUT
Input signal to different TV/SCART/AV/S/VGA terminals, connect SCART
connector to TV as monitor. Select SCART OUTPUT item of menu to TV, check output
of picture and sound if they are all TV picture and sound, and if they are normal; select
SCART OUTPUT item of menu to MINITOR, check picture and sound if they are
current picture and sound of signal (Under VGA state, switch to formal VGA) and
check if they are normal.
(* Note: For the TV sets produced in the initial stage the picture is colorless for the signal
output from AV OUTPUT,SCART OUTPUT under S-terminal)
3.4.2 inspection of special function of SCART INPUT
a) After power supply on, input SCART to signal generator, the set should
automatically switch to AV1or AV1 RGB state.
b) SCART signal generator outputs CVBS signal (color bar + multi-wave group ),
observe if the picture of the set is normal. The normal screen should be AV1: change
SCART signal to RGB format, the normal screen should be AV1 RGB.
c) Disconnect SCART signal, the set could come back to current TV state.
(Note: This special function is not applicable to VGA)
3.5 VGA connector
Input VGA signal (K7253 signal generator), input different VGA format signal listed
in table 2, after completion of the auto calibration, check the picture and sound if they
are normal. If there is interfere in picture, push the auto-adjustment key on the remote
control set one more time, check if the display is normal.
3.6 Factory preset
Enter factory menu, perform factory presetting under TV state.
3.7 Packing for factory outgoing
Check accessory, then pack.
Table 2.VGA format signal
screen size resolution
Image clock
(MHz)
H-SYNC
(kHz)
V-SYNC
(Hz)
remark
640x480 @ 60 25.175 31.469 59.900
720x400 @ 70 28.322 31.469 70.086
800x600 @ 60 40.000 37.879 60.317
1024x768 @ 60 65.000 48.363 60.004
640x480 @ 75 31.500 37.500 75.000
800x600 @ 75 49.500 46.875 75.000
15”
1024x768 @ 75 78.750 60.023 75.029
640x480 @ 60 25.175 31.469 59.900
720x400 @ 70 28.322 31.469 70.086
800x600 @ 60 40.000 37.879 60.317
17”
1024x768 @ 60 65.000 48.363 60.004