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3. NO RASTER (OSD IS NOT DISPLAYED) – gmzanl
NO RASTER
(OSD IS NOT DISPLAYED)
U3
POWER PINS
3.3V?
YES
U3 PIN141, 142
OSCILLATE AS 14.3M?
YES
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?
YES
J5 PIN1
3.3V?
YES
TROUBLE IN CABLE
OR LCD MODULE
NO
NO
NO
NO
CHECK U2, U24
1. CHECK PIN141, 142
SOLDERING CONDITION
2. CHECK X2
3. TROUBLE IN U3
CHECK U5'S SOLDERING
CONDITION AND
CHECK CONNECTION LINE
FROM U3 TO J5
CHECK U12, U30
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