3-7
2. Audio Troubleshooting Flow
YES
YES
YES
YES
NO
NO
NO
YES
YES
YES
YES
NO
NO
NO
YES
NO
YES
Is 3.3V supplied to the pin 77 and
78 of IC701?
Is 27MHz Clock input into the pin
36 of IC701? Fig01
Is 33MHz Clock is output from the
pin 26 of IC701? Fig02
(1) NO ATSC Audio
Is 27MHz Clock is output from the
Pin 3 of IC603
Check R702, C707, C708
Is the pin 59 of IC701 is grounded?
Is 18.432MHz clock output from
the pin 67 of IC701? Fig05
Check R701, C703, C704
Is Data output from the pin 73 of
IC701? Fig06
Is 3.072MHz clock output from the
pin 63 of IC701? Fig07
Is 48kHz clock output from the pin
64 of IC701? Fig08
Check the surroundings of IC701
Check the Power Supply Part
Is pulse input into the pin 40 and
41 of IC701? Fig03, Fig04
Is Logic Low Input into the pin 1 of
IC711 and Logic High into the pin 1
of IC503 respectively?
Check the pin 56, 36 of
the IC201.
Check IC503, IC711
Check
IC500
Are pulses input into the pin 3, 6 of
IC503?
1.1 Check IC701 and Surroundings
Summary of Contents for HD-SAT520
Page 8: ...3 8 Fig 01 Fig 02 Fig 03 Fig 04 Fig 05 Fig 06 Fig 07 Fig 08...
Page 14: ...3 14 Fig 12 Fig 13...
Page 39: ...3 39 FIG 01 FIG 02 FIG 03 FIG 04 FIG 05...
Page 105: ...3 68 3 69 2 FRONT CIRCUIT DIAGRAM...
Page 106: ...3 70 3 71 3 CPU 1 CIRCUIT DIAGRAM...
Page 107: ...3 72 3 73 4 CPU 2 CIRCUIT DIAGRAM...
Page 108: ...3 74 3 75 5 TERRESTRIAL CIRCUIT DIAGRAM...
Page 109: ...3 76 3 77 6 DVI TRANSMITTER NTSC ENCODER CIRCUIT DIAGRAM...
Page 110: ...3 78 3 79 7 ATSC TP DEMUX VD XDO CIRCUIT DIAGRAM...
Page 111: ...3 80 3 81 8 VDP I F DISPLAY CIRCUIT DIAGRAM...
Page 112: ...3 82 3 83 9 AUDIO DECODER SPDIF CIRCUIT DIAGRAM...
Page 113: ...3 84 3 85 10 NTSC AUDIO PROCESSOR CIRCUIT DIAGRAM...
Page 114: ...3 86 3 87 11 POWER DSS FRONT CIRCUIT DIAGRAM...
Page 115: ...3 88 3 89 12 DIRECTV TP DEMUX CIRCUIT DIAGRAM...
Page 116: ...3 90 3 91 13 SMART CARD I F CIRCUIT DIAGRAM 1...
Page 117: ...3 92 3 93 14 SMART CARD I F CIRCUIT DIAGRAM 2...
Page 118: ...3 94 3 95 PRINTED CIRCUIT DIAGRAMS 1 DIGITAL MAIN P C BOARD BOTTOM...
Page 119: ...3 96 3 97 2 DIGITAL MAIN P C BOARD TOP...
Page 120: ...3 98 3 99 3 POWER P C BOARD 4 KEY P C BOARD 5 KEY P C BOARD LOCATION GUIDE...
