LG 42LB1DRA Service Manual - Page 27

- 27 - • DCR DVR RF/AV MODE Check A nten na Cable Check M ain Pict ure Sub Pictur e (PIP) Main Pictur e Check N TSC Tuner 5V, 33V, Video out Check C onnecto r Check C XA2069 Power pi ns, TV Check F MS6400 Power pi ns, Yin Check U pd64015 Power pins , Osc, AYI1 Check u PD64015 outputs HD, VD, Check Si gnal Data Check C PLD HD, VD Check C Y2309 CLK A4 Sub Picture Check A TSC/NTSC Tune r 5V, Video out Check C onnecto r Check C XA2069 Power pi ns, TV Check F MS6400 Power pi ns, Yin Check U pd64015 Power pins , Osc, AYI1 Check u PD64015 outputs HD, VD, Check 74 FCT244 1Y1, 3Y2 1 : _Check Anten na cable (RF Switch, Tuner ..) 2 : _Execu te DW or PIP 3 : _Check Tun ers Vcc and Video out 4 : _Check CXA2069 power, inpu t signa l _TV, V5 si gnal shape looks like figure7.1 5 : _Check FMS6400 power, inpu t signa l _Yin si gnal sh ape looks like figure7.1 6 : _Check uPD64001 power, input signal _AYI1 signal shape looks like figure7.1 7 : _Check uPD64011 output signal (ROCK) : (HD) : (VD) : 1155.7.755KKHHzz 1133.5.5MMHHzzICIC770011 2277MMHHzz ICIC770055 5599.9.944HHzz DDigigitiatal lDDaatata 8 : _Check the si gnal 9 : _Check the si gnal 10 : _Check the si gnal (HD) : (VD) : (Clk) : DDigigitiatal lDDaatata 27MHz 1155.7.755KKHHzz 5599.9.944HHzz 13.5Mhz