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Problems Checking Points Checking components
1) TV does not have any 13) Hot-Plug Signal LB3906, R3902, R3903, Q3901,
display. Set FL display D3901
shows U702/U703
14) TDMS Output swing amplitude R3901
control resistor
15) Host Interface External Input LB8702
Clock from LSI (IC8001) to
Up-Con IC (IC3901) - OSC27M
16) Video Data Lines from LSI RX3707, RX3708, IC3901
(IC8001) to Up-Con (IC3901) (Pin 92 to 95, Pin 87 to 90)
2) When switching the video 1) Supply for Up-Con (IC3901) LB3902
output mode from 480P to - Pin 9,124
720p/1080i, TV display 2) GND for Up-Con
becomes blank - Pin 7,125
3) Check for capacitor short to C3902, C3928, C3925
GND
3) Color Problem. TV Screen 1) Check digital video data line RX3707, RX3708
is White/Blue/Purple from LSI(IC8001) to Up-Converter
(IC3901), VOUT0-VOUT7.
4) HDMI got no audio output 1) Audio data lines R8402, RX8402
2) Check setting of the set in * Check for solder short and/or
Setup Menu whether the HDMI component missing/damaged
Audio output is turned On as well as signal condition.