4-13
4. Troubleshooting
4-1-7. No Sound
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the RF Source
Check the SEMT01(MT8226)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
1
23
No
Check a connection harness and
headphone jack./Side AV
Check Sound Processor
IC2102 (MT8291)
No
Picture is display, no sound.
Check a B12V Line.
Change a main PCB ass’y.
No
Does the signal appear at pin #6, #4, #5,
#12(MCLK, BCLK, LRCLK, DATA)
of IC2102?
Check the DC 12V
BD2107 of IC2104?
Please, Contact Tech support.
No
Does the signal appear at
Pin #47 or 48, #53 or
54(CH1_L, R Sound) And Pin
#36 or 37, #30 or 31
(CH2_L, R Sound) of IC2104?
Replace the speaker ass’y?
Yes
Connect a sound cable.
control a volume.
Yes
1
Yes
3
Yes
2
Caution
Make sure to disconnect the power before working on the IP board.
Содержание LE32A55*P
Страница 8: ...1 4 1 Precautions Memo ...
Страница 24: ...3 6 3 Disassembly and Reassemble Memo ...
Страница 28: ...4 4 4 Troubleshooting WAVEFORMS 1 R G B Output Signal ...
Страница 30: ...4 6 4 Troubleshooting WAVEFORMS 2 Digital Output Data 3 Signal of HDMI Data ...
Страница 32: ...4 8 4 Troubleshooting WAVEFORMS 3 CVBS Output Signal 4 Tuner_CVBS Output Signal ...
Страница 34: ...4 10 4 Troubleshooting WAVEFORMS 4 CVBS Output Signal ...
Страница 36: ...4 12 4 Troubleshooting WAVEFORMS 2 Digital Output Data 5 Analog Signal Y C ...
Страница 38: ...4 14 4 Troubleshooting WAVEFORMS 6 The Signal are Inputed to IC2102 7 The Signal are Inputed to IC2104 ...
Страница 228: ...5 166 5 Exploded View Part List Memo ...
Страница 229: ...6 1 6 Wiring Diagram 6 Wiring Diagram 6 1 Wiring Diagram ...
Страница 230: ...6 2 6 Wiring Diagram ...
Страница 231: ...6 3 6 Wiring Diagram 6 2 Wiring Picture ...
Страница 234: ...6 6 6 Wiring Diagram Memo ...
Страница 235: ...7 1 7 Schematic Diagram 7 Schematic Diagram 7 1 MT8226 EMMA Block Diagram ...
Страница 237: ...7 3 7 Schematic Diagram 7 3 Schematic Diagrams 7 3 1 MAIN POWER BLOCK ...
Страница 238: ...7 4 7 Schematic Diagram 7 3 2 SOUND 7 3 3 Jack_In_Out 1 Function ...
Страница 239: ...7 5 7 Schematic Diagram 7 3 4 Jack_In_Out 2 HDMI_Switch 7 3 5 Jack_In_Out 3 Tuner ...
Страница 240: ...7 6 7 Schematic Diagram 7 3 6 Scaler 1 Flash memory Sub Micom 7 3 7 Scaler 2 Main DDR ...
Страница 241: ...7 7 7 Schematic Diagram 7 3 8 Scaler Power Service 7 3 9 FBE3 LVDS Out ...
Страница 242: ...7 8 7 Schematic Diagram 7 3 10 Emma2 DTV DDR 7 3 11 Emma2SL PCMCIA Flash memory ...