Sharp LC32SB27U Service Manual - Page 59

I2C line: TUN_SCL_C5/TUN_SDA_C5, etc

Get Sharp LC32SB27U - LC - 32inch LCD TV PDF manuals and user guides
UPC - 074000372115
View all Sharp LC32SB27U manuals
Add to My Manuals
Save this manual to your list of manuals

Page 59 highlights

No audio (3) LC-32D47U/LC-32SB27U/LC-C3237U No audio at UHF/VHF broadcast signal reception. No audio at digital broadcast signal reception. Is TV selected on the input select menu screen? Is TV selected on the input select menu screen? NO YES Refer to "No video at UHF/VHF broadcast signal reception". Is the audio output selected for "VARIABLE" on the menu screen? YES NO Refer to "No video at digital broadcast signal reception". If no video appears, refer to "No video at digital broadcast signal reception". NO Set the audio output to "FIXED". YES Is there the SIF signal output at pin (16) of tuner (TU1101)? Is the audio output selected for "VARIABLE" on the menu screen? YES NO Check the tuner (TU1101) and its peripheral circuits. (I2C line: TUN_SCL_C5/TUN_SDA_C5, etc) Does the SIF signal come from pin (16) of tuner (TU1101) to pin (D5) of IC8001 (CPU)? NO Set the audio output to "FIXED". NO YES Check the line between TU1101 and IC8001, and their peripheral circuits (Q1101, Q1102, etc.). YES Does the audio signal come from pins (C4/A3) (SPOUT_L/R) of IC8001 (CPU) to pins (3) (INLP), and (7) (INRP) of IC2701 (AMP)? NO Check the line between IC8001 and IC2701, and their peripheral circuits (Q1306/Q1307, AMP_MUTE line, etc). YES Is the audio output from IC2701 as specified? NO Check IC2701 and its peripheral circuits. YES Check the connector (P2701), speakers and their peripheral circuits. 6 - 9

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
LC-32D47U/LC-32SB27U/LC-C3237U
6 – 9
No audio (3)
No audio at UHF/VHF broadcast signal reception.
No audio at digital broadcast signal reception.
Is TV selected on the input select menu screen?
Is TV selected on the input select menu screen?
YES
NO
YES
NO
Refer to “No video at UHF/VHF broadcast signal
reception”.
Refer to “No video at digital broadcast signal reception”.
Is the audio output selected for “VARIABLE” on the menu screen?
If no video appears, refer to “No video at digital broadcast signal reception”.
YES
NO
Set the audio output to “FIXED”.
Is there the SIF signal output at pin (16) of tuner (TU1101)?
Is the audio output selected for “VARIABLE” on the menu screen?
YES
NO
YES
NO
Check the tuner (TU1101) and its peripheral circuits.
(I2C line: TUN_SCL_C5/TUN_SDA_C5, etc)
Set the audio output to “FIXED”.
Does the SIF signal come from pin (16) of tuner (TU1101) to pin
(D5) of IC8001 (CPU)?
YES
NO
Check the line between TU1101 and IC8001, and their
peripheral circuits (Q1101, Q1102, etc.).
Does the audio signal come from pins (C4/A3) (SPOUT_L/R) of IC8001 (CPU) to
pins (3) (INLP), and (7) (INRP) of IC2701 (AMP)?
NO
Check the line between IC8001 and IC2701,
and their peripheral circuits (Q1306/Q1307,
AMP_MUTE line, etc).
YES
Is the audio output from IC2701 as specified?
NO
Check IC2701 and its peripheral circuits.
YES
Check the connector (P2701), speakers and their peripheral circuits.