LG LM805L-WL, Service Manual

Page: 17 / 49

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2.NO RASTER STATE ON ANALOG SIGNAL
NO RASTER ON ANALOG
SIGNAL
CONN(J17) CHECK
CHECK THE PERIPHERAL IC
OF D-SUB(J17)
CHECK THE PERIPHERAL IC
OF AD9883(U4)
CHECK THE PERIPHERAL IC
OF PW166(U8)
CHECK THE PERIPHERAL IC
OF LVDS(U23)
CHECK I/O SYNC OF
74LVC257(U5)
CHECK AD9883(U4) I/O
SIGNAL
CHECK PW166(U8) I/O SIGNAL
CHECK LVDS(U23) I/O SIGNAL
POWER CHECK OF 74LVC257(U5) : U37(3.3V)
POWER CHECK OF AD9883 : U2(DVDD,AVD), L11(V33-ADC)
POWER CHECK OF PW166(U8) :BA033T(U37) =>3.3V, LM317(U10) =>2.5STB
POWER CHECK OF LVDS(U23) : L14(LVDCVCC), L15(PLLVCC)
NO INPUT SIGNAL
NO OUTPUT SIGNAL
NO OUTPUT SIGNAL
NO INPUT SIGNAL
NO OUTPUT SIGNAL
NO INPUT SIGNAL