LG L15V26 - 30 Video Flowchart

Directview LCD Training 27 Circuit Descriptions
CIRCUIT DESCRIPTIONS
Scaler
(Format Converter)
LCD Driver
(LVDS Transmitter)
ATSC Video In
Video
Decoder
TMDS
Receiver
De-
interlacer
Analog/
Digital
Converter
NTSC
Video In
Composite
Switch
LCD
Panel
S-Video
Video Problem
(no video, dark,
distorted, etc.)
Video is
present but screen is
dark, flickering, or
doesn't light up
Defective lamp(s)
or inverter
Check lamps and
connectors for signs
of being burnt out.
Replace defective
lamp(s)
Replace inverter
Video from a
PC is blurry
Color beat noise
Check for shield
case being
touched
Adjust phase in the
TV's user menu for
PC input
Set the PCs video to
1280x1024@60Hz and
change monitor driver
to Digital Flat Panel
(1280x1024)
On the PC, activate
ClearType or activate
smooth edges of
screen fonts.
No video
Cracked
components or bad
solder near tuner
Replace
components or fix
bad solder joints
Check LCD
module
connectors and
main board
voltages
Problem lies
elsewhere
Yes
No
No
Yes
No
No
No
and/or and/or and/or
Yes
Yes Yes
No
30” VIDEO
FLOWCHART
TROUBLESHOOTING DIAGRAM
PCB