3-37
8. TUNER TROUBLESHOOTING
Tuner
problem
Yes
TU100(9-pin)
+30V Input OK
No
J114 Connector
Power Cable
Check
TU100(1,8,12-pin)
+5V Input OK
TU100(23-pin)
+3.3V Input OK
TU100(21-pin)
+1.8V Input OK
No
Yes
No
Yes
IC137(3-pin)
+1.8V output OK
No
No
Yes
IC137(1-pin)
+3.3V input OK
No
Yes
Change IC137
IC151(6,7-pin)
I2C Bus OK
IC151(8-pin)
+5 input OK
No
No
Yes
J114 Connector
Power Cable
Check
Yes
Yes
IC111(5-pin
+5 input OK
IC111(1-pin)
12MHz input clock
OK
Yes
IC113(20-pin)
+5 input OK
Yes
No
No
Check U101
12MHz Clock out
No
Yes
System Part
Check
IC148(MiCOM)
Check OK
Check
Gemster Board
Check IC113
Chang IC151
Yes
No
Check IC148
No
Check Gemstar Board
Tuner part OK
Yes
TU100(Tuner )
Voltage check
Summary of Contents for LST-3410A
Page 30: ...3 18 ...
Page 53: ......
Page 57: ......
Page 63: ......
Page 64: ...3 41 3 42 WAVEFORMS 1 SYSTEM PART 1 1 1 2 2 System Reset System Main Clock 33 333MHz ...
Page 71: ...3 55 3 56 8 PVR PART 1 2 1 Variable Audio_L Out SPDIF Out Signal ...
Page 72: ...3 57 3 58 9 PVR PART 2 1 2 BCM7040 Memory Clock BCM7040 Clock ...
Page 75: ...3 63 3 64 12 1394 PART 1 2 1394 TP Out Clock 1394 X Tal Clock ...
Page 77: ......
Page 79: ...3 72 3 73 2 CPU CIRCUIT DIAGRAM 1 SMEM_DATA S_MEM ADR PER_DATA PER_ADDR CPU CLOCK ...
Page 80: ...3 74 3 75 3 BOOT STRAPPING CLOCK CPLD CIRCUIT DIAGRAM PER DATA PER ADR TO CPU P8 P9 P4 ...
Page 82: ...3 78 3 79 5 HD II CIRCUIT DIAGRAM PES CLOCK PER ADDR PER DATA Valid TP DATA CLK ...
Page 84: ...3 82 3 83 7 AUDIO PROCESSOR SPDIF OUT CIRCUIT DIAGRAM ...
Page 85: ...3 84 3 85 8 NTSC DECODER DVI OUTPUT CIRCUIT DIAGRAM ...
Page 86: ...3 86 3 87 9 TPN II MEMORY CIRCUIT DIAGRAM ...
Page 87: ...3 88 3 89 10 MPEG ENCODER MEMORY CIRCUIT DIAGRAM ...
Page 88: ...3 90 3 91 11 PCI2IDE CONTROLLER CIRCUIT DIAGRAM ...
Page 89: ...3 92 3 93 12 ATSC QAM NTSC NIM TUNER CIRCUIT DIAGRAM ...
Page 90: ...3 94 3 95 13 AUDIO VIDEO OUT CIRCUIT DIAGRAM ...
Page 91: ...3 96 3 97 14 1394 CIRCUIT DIAGRAM ...
Page 92: ...3 98 3 99 15 MICOM POWER I F FRONT I F CIRCUIT DIAGRAM ...
Page 93: ...3 100 3 101 16 FRONT CIRCUIT DIAGRAM ...
Page 94: ...3 102 3 103 17 GEMSTAR CONTROLLER CIRCUIT DIAGRAM ...
Page 95: ...3 104 3 105 18 GEMSTAR MEMORY CIRCUIT DIAGRAM ...
Page 96: ...3 106 3 107 19 GEMSTAR MICOM I F CIRCUIT DIAGRAM ...
Page 97: ...3 108 3 109 PRINTED CIRCUIT DIAGRAMS 1 DIGITAL MAIN PRINTED CIRCUIT DIAGRAMS TOP ...
Page 98: ...3 110 3 111 2 DIGITAL MAIN PRINTED CIRCUIT DIAGRAMS BOTTOM LOCATION GUIDE ...
Page 99: ...3 112 3 113 3 SMPS POWER PRINTED CIRCUIT DIAGRAM LOCATION GUIDE ...
Page 100: ...3 114 3 115 5 GEMSTAR PRINTED CIRCUIT DIAGRAM BOTTOM 4 GEMSTAR PRINTED CIRCUIT DIAGRAM TOP ...
Page 101: ...3 116 3 117 6 KEY PRINTED CIRCUIT DIAGRAM 7 TIMER PRINTED CIRCUIT DIAGRAM LOCATION GUIDE ...
Page 135: ......