LG L15V26 - 15 Video Circuitry

Directview LCD Training 22 Circuit Descriptions
CIRCUIT DESCRIPTIONS
15” VIDEO
FLOWCHART
PCB
Scaler
(Format Converter)
LCD Driver
Micro
ATSC
Video In
NTSC
Video In
Digital
Switch
Analog
Switch
Analog/
Digital
Converter
Composite
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 solder of
JA202 and IC202
or shield case
being touched
Adjust phase in the
TV's user menu for
PC input
Set the PCs video to
1024x768@60Hz and
change monitor driver
to Digital Flat Panel
(1024x768)
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
Contact techincal
support for more
assistance
Yes
No
No
Yes
No
No
No
and/or and/or and/or
Yes
Yes Yes
No
TROUBLESHOOTING DIAGRAM