Sanyo LCD-19R30, Руководство по обслуживанию

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2. Sound normal, but no picture
(blue screen and OSD can be displayed.)
Sound is OK,
but no picture.
Check backlight
is lit.
Yes No
Try other source, to
check the picture
display.
Check backlight
board, main chip pin
81 backlight control
status.
Yes No
Check NS01
and its
periphery.
Check according to
steps of
4. Picture
OK, but no sound.
Note: HDMI channel is excluded. For HDMI channel picture and sound check, please refer to procedure
of 5.
3. Sound OK, but no picture (only backlight lights up)
Sound is ok, but
only raster appears.
Check LVDS power
supply is normal.
Normal Abnormal
Check signal from NS01
to XS01 is normal.
Normal Abnormal
Panel LVDS
reception board
has problem.
Check NS01 power
supply and its
peripheral circuit.
Check NJ05 pin 2 is
low level or not.
Yes No
Check N402 circuit.
Check NS01 pin 162
and its inverter circuit.
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