5 Troubleshooting
LW22A13W
5-17
CONFIDENTIAL
5-9 No Sound
Does the signal appear at
Pin 67 (Tuner sound signal) and Pin
47, 48 (PC sound) and Pin 53, 54
(SCART1 sound) and Pin 56, 57
(SCART2 sound) and Pin 50, 51
(VCR) of IC919 (MSP3451G)?
Chagne a FPC cable. (CN101)
Change a input board assy. (BN59-00339A)
Picture is display.
Yes
Yes
No
Connect the sound cable.
(RF, Video, Scart, PC etc)
Connect a speaker wire.
No
Check the DC +8V,
+12V_3 of IC919, IC501?
Power rugulator IC (ICP23) are bad.
Change main board assy. (BN94-00400A)
Yes
No
Does the signal
appear at L501~L504?
Sound IC (IC919 or IC501) are bad.
Change main board assy. (BN94-00400A)
Yes
No
Replace the speaker assy
BN96-00176A (R),
BN96-00177A (L)?
49
48
50
Summary of Contents for LW22A13W
Page 14: ...4 Alignments and Adjustments LW22A13W 4 3 CONFIDENTIAL ...
Page 16: ...5 Troubleshooting 5 2 LW22A13W CONFIDENTIAL 1 2 3 4 5 6 7 WAVEFORMS ...
Page 18: ...5 Troubleshooting 5 4 LW22A13W CONFIDENTIAL 8 9 10 11 12 WAVEFORMS ...
Page 20: ...5 Troubleshooting 5 6 LW22A13W CONFIDENTIAL 13 14 15 16 17 WAVEFORMS ...
Page 22: ...5 Troubleshooting 5 8 LW22A13W CONFIDENTIAL 18 19 20 21 22 23 WAVEFORMS ...
Page 24: ...5 Troubleshooting 5 10 LW22A13W CONFIDENTIAL 24 25 26 27 28 29 WAVEFORMS ...
Page 26: ...5 Troubleshooting 5 12 LW22A13W CONFIDENTIAL 30 31 32 33 34 35 WAVEFORMS ...
Page 28: ...5 Troubleshooting 5 14 LW22A13W CONFIDENTIAL 36 37 38 39 40 41 WAVEFORMS ...
Page 30: ...5 Troubleshooting 5 16 LW22A13W CONFIDENTIAL 42 43 44 45 46 47 WAVEFORMS ...
Page 32: ...5 Troubleshooting 5 18 LW22A13W CONFIDENTIAL 48 49 50 WAVEFORMS ...
Page 33: ...CONFIDENTIAL LW22A13W 6 1 6 Exploded View and Parts List ...
Page 110: ...8 Block Diagram 8 1 Main LW22A13W 8 1 CONFIDENTIAL ...
Page 111: ...8 Block Diagrams 8 2 LW22A13W CONFIDENTIAL 8 2 Power LVDS ...
Page 115: ...43 44 CONFIDENTIAL 10 Schematic Diagrams 10 2 LW22A13W 37 38 19 20 25 26 31 32 ...
Page 117: ...CONFIDENTIAL 10 Schematic Diagrams 10 4 LW22A13W 11 12 16 17 22 23 28 29 34 35 40 41 46 47 ...
Page 119: ...10 Schematic Diagrams 10 6 LW22A13W CONFIDENTIAL 49 50 7 48 2 3 4 5 6 ...
Page 121: ...10 Schematic Diagrams 10 8 LW22A13W CONFIDENTIAL 8 9 10 13 14 15 21 45 27 39 33 ...
Page 123: ...10 Schematic Diagrams 10 10 LW22A13W CONFIDENTIAL 1 18 24 30 36 42 ...