3-31
5. ATSC/ QAM Front- End Troubleshooting Flow
YES
YES
START
Is Power supplied normally?
Is RF signal detected?
(using Spectrum Analyzer)
Check IC203’s output signals of
DATA(
Fig. 01
) (AR200,AR201),
packet valid signal(
Fig. 02
)(AR202
or the pin 27 of IC203) and Byte
clock(the pin 30 of CN2301)
(
Fig. 03
)
YES
YES
Check the power lines referring
the circuit diagram
Change channel with DTV signal
Check the status of connection on PCB.
Check Error flag LED. (LD200)
OFF: normal, ON: Error
END
YES
Check the NIM Tuner(IC203) and
peripheral parts
FIG. 03
FIG. 02
FIG. 01
Summary of Contents for LST-3100A
Page 17: ...3 8 Fig 01 12 2880MHz clock Fig 02 48KHz clock Fig 04 Analog Audio Signal Fig 03 Data Signal ...
Page 19: ...3 10 Fig 06 Analog Audio Signal ...
Page 22: ...3 13 Fig 07 Digital Audio Signal Fig 08 Coaxial Digital Audio Signal ...
Page 31: ...3 23 FIG 04 V sync signal FIG 03 H sync signal ...
Page 33: ...3 25 FIG 05 Input Stream to IC203 FIG 06 Interrupt Signal ...
Page 34: ...3 26 ...
Page 35: ...3 27 ...
Page 36: ...3 28 YES D Check analog buffers IC303 for 480i Jump to A flow ...
Page 50: ...3 50 3 51 2 CPU AUDIO POWER CIRCUIT DIAGRAM ...
Page 51: ...3 52 3 53 3 HD2 TUNER DVI CIRCUIT DIAGRAM ...
Page 52: ...3 54 3 55 4 ATSCII STB CIRCUIT DIAGRAM ...
Page 53: ...3 56 3 57 5 FRONT CIRCUIT DIAGRAM ...
Page 54: ...3 58 3 59 PRINTED CIRCUIT DIAGRAMS 1 DIGITAL MAIN P C BOARD BOTTOM LOCATION GUIDE ...
Page 55: ...3 60 3 61 2 DIGITAL MAIN P C BOARD TOP ...
Page 56: ...3 62 3 63 3 FRONT P C BOARD 4 POWER P C BOARD LOCATION GUIDE ...
Page 57: ......
