3-12
3. NTSC/FRONT_END TROUBLESHOOTING
Start
Power is supplied normally?
YES
NO
RF signal is detected?
(using Spectrum Analyzer)
YES
What Voltage is between L303 and ground ?
5V : NO 1V( below) : YES
Check NIM Tuner(TU300)’s output signal
of VIDEO_OUT(pin 16,
Fig.04
).
END
YES
YES
YES
NO
Check antenna connection.
Check the power lines(A9V, D5V_2,
D3.3V_2, P_30V_TU)
referring the circuit diagram
Change Q300.
Change TU300.
NO
NO
FIG.04
TU300(16) NTSC VIDEO OUT
Summary of Contents for HCS6000A
Page 27: ...3 17 FIG 06 Digital Stream Input to IC400 FIG 07 Interrupt Request Signal on R418 ...
Page 31: ...3 21 FIG 13 27MHz NTSC encoder pixel clock FIG 14 Composite Output top ...
Page 35: ...3 25 FIG 05 DVI output at 480i even field FIG 06 DVI output at 480i odd field ...
Page 45: ...CIRCUIT DIAGRAMS 1 CPU SYSTEM MEMORY CIRCUIT DIAGRAM 3 35 3 36 ...
Page 46: ...3 37 3 38 2 CPU PERI IR IN AUX CTRL CIRCUIT DIAGRAM ...
Page 47: ...3 39 3 40 3 TERRESTRIAL FRONT_END CIRCUIT DIAGRAM ...
Page 48: ...3 41 3 42 4 HD2 SDRAM CIRCUIT DIAGRAM ...
Page 49: ...3 43 3 44 5 DVI TRANSMITTER CIRCUIT DIAGRAM ...
Page 50: ...6 VDP I F DISPLAY OUTPUT CIRCUIT DIAGRAM 3 45 3 46 ...
Page 51: ...3 47 3 48 7 NTSC AUDIO PROCESSOR CIRCUIT DIAGRAM ...
Page 52: ...3 49 3 50 8 POWER REGULATION CIRCUIT DIAGRAM ...
Page 53: ...3 51 3 52 9 MPI CIRCUIT DIAGRAM ...
Page 54: ...3 53 3 54 10 PTC CIRCUIT DIAGRAM ...
Page 55: ...3 55 3 56 11 BACK PLANE CIRCUIT DIAGRAM ...
Page 56: ...3 57 3 58 PRINTED CIRCUIT DIAGRAMS 1 DIGITAL MAIN PRINTED CIRCUIT DIAGRAMS TOP ...
Page 57: ...3 59 3 60 2 DIGITAL MAIN PRINTED CIRCUIT DIAGRAMS BOTTOM ...
Page 58: ...3 61 3 62 3 MPI PRINTED CIRCUIT DIAGRAM TOP TOP VIEW BOTTOM VIEW ...
Page 59: ...3 63 3 64 4 PTC PRINTED CIRCUIT DIAGRAM TOP VIEW BOTTOM VIEW ...
Page 60: ...3 65 3 66 5 BACK PLANE PRINTED CIRCUIT DIAGRAM TOP VIEW BOTTOM VIEW ...