LG Flatron LCD 575LE

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1. CHECK PIN141, 142
SOLDERING CONDITION
2. CHECK X2
3. TROUBLE IN U3
U3
POWER PINS
3.3V?
NO
CHECK U2, U24
U3 PIN141, 142
OSCILLATE AS 14.3M?
NO
CHECK U5’S SOLDERING
CONDITION AND
CHECK CONNECTION LINE
FROM U3 TO J5
NO
TROUBLE IN CABLE
OR LCD MODULE
CHECK U12, U30
J5 PIN1
3.3V?
NO
YES
YES
YES
YES
3. NO RASTER (OSD IS NOT DISPLAYED) – gmzanl
NO RASTER
(OSD IS NOT DISPLAYED)
J5
PIN2 IS 65MHz CLOCK?
PIN4 IS 48KHz H-SYNC?
PIN5 IS 60Hz V-SYNC?
PIN37 IS 48KHz H-SYNC?
IS PULSE APPEARED
AT SIGNAL PINS?