LG L1511S Service Manual - Page 12
No Raster Osd Is Not Displayed - Gmzan2
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3. NO RASTER (OSD IS NOT DISPLAYED) - gmZAN2 NO RASTER (OSD IS NOT DISPLAYED) U201 POWER PINS 3.3V? YES U201 PIN141, 142 OSCILLATE AS 20MHZ? YES NO CHECK U802, U806 1. CHECK PIN141, 142 NO SOLDERING CONDITION 2. CHECK X201 3. TROUBLE IN U201 U401 PIN31 IS 65MHz CLOCK? PIN27 IS 48KHz H-SYNC? NO PIN28 IS 60Hz V-SYNC? PIN30 IS 48KHz DEN? IS PULSE APPEARED AT SIGNAL PINS? YES U401 PIN1 NO 3.3V? YES TROUBLE IN CABLE OR LCD MODULE CHECK CONNECTION LINE FROM U201 TO U401 CHECK U805
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1. CHECK PIN141, 142
SOLDERING CONDITION
2. CHECK X201
3.
TROUBLE IN U201
U201
POWER PINS
3.3V?
NO
CHECK U802, U806
U201 PIN141, 142
OSCILLATE AS 20MHZ?
CHECK CONNECTION LINE
FROM U201 TO U401
NO
TROUBLE IN CABLE
OR LCD MODULE
CHECK U805
U401 PIN1
3.3V?
NO
YES
YES
YES
YES
3. NO RASTER (OSD IS NOT DISPLAYED) – gmZAN2
NO RASTER
(OSD IS NOT DISPLAYED)
U401
PIN31 IS 65MHz CLOCK?
PIN27 IS 48KHz H-SYNC?
PIN28 IS 60Hz V-SYNC?
PIN30 IS 48KHz DEN?
IS PULSE APPEARED
AT SIGNAL PINS?
NO