XG-V10XU - diagramas.diagram...

XG-V10XUTROUBLE SHOOTING T ABLE (Continued)Checking the chroma and Y signals of IC801(RGB signal output)Are there signal inputs at pins (12),(31) and (37) of SC401?NoYesGo to "Checking the video unitcircuit".Are there output waveforms at pins(7) of IC6014 (chroma signal) and(7), (Y signal)of IC6015?NoYesAre there signal inputs at pins (20)(chroma signal) and (21) (Y signal)of IC803?NoCheck the IC6009 IC6010 and IC6011switching and their peripheral circuits.If there is no signal at pins (1) ofIC6014 and pin (5) of IC6015 and pin(16) of IC6010 check 3-D noisereduction circuit (IC6009).Check IC6009 (3-D noise reductioncircuit) and its peripheral circuits.YesGo to "Checking IC801 (RGB signaloutput circuit)".Check IC803 and its peripheralcircuits.Checking IC806 (3-D noise reduction circuit)and its peripheral circuitsAre there signal inputs at pins (40)(Y signal) and (45)(chroma signal) ofIC6009?YesAre there signal outputs at pins (55)(Y signal) and (51)(chroma signal) ofIC8001?YesAre there signal outputs at theemitters of Q6010 (Y signal) andQ6015 (chroma signal)?YesCheck IC6011, IC6014, IC6015 andIC801 (RGB signal output circuit).NoNoNoCheck the buffer circuit of Q6007 thruQ6011 as well as Q6013 thru Q6014.Check IC6008, IC6010 (memory) andtheir peripheral circuits.Check the low-pass circuit aroundQ6010, Q6012 and Q6015.No colour or unusual tone (NTSC, PAL, PALM, PALN)Is there chroma signal input at pin(20) of IC801?YesAre there signal outputs at pins(46)(R-Y) and (45)(B-Y) of IC801?YesCheck IC804, IC805 and theirperipheral circuits.NoNoGo back to the signal processingblock.Check the oscillation of X801, X802,X803 and X804 and their peripheralcircuits.43