HT-DV30H
7 – 3
3. Both Video and Audio do not operate normally
43
42
58
57
252
252
IC1
1
2
3
4
IC1
5
IC1
5
The RF waveform is normal and the time is displayed normally, but no sound is produced. Or the sound has dropouts.
1. Insert disc into DISC loader.
Yes
2. When playback starts does the disc initialise ? No Repeat steps as Focus Errror system check occurred.
Yes
3. Is the RF signal level output from IC1 pin no 252 normal?
( Waveform drawing Figure 3 for CD and Figure 2 for DVD )
No Is the objective lens of optical pickups clean ?
Yes
Yes
4. Replace Servo PWB. No Replace optical pickup mechanism unit.
Yes
5. Does the supply shows as +1.8V / + 3.3 V / + 5 V / + 12V? No Check supply ( IC3 Pin No. , +1.8V / CNP5 Pin 1, +3.3V /
CNP5 Pin 3, +5V / CNP5, +12V
Yes
6. Is Reset function OK? No Check CNP4 pin no 18 .
Yes
7. Is clock frequency shows 27MHz? No Check clock circuit ( XL1 , C86 , C92 )
Yes
8. Is the SDRAM is normal? No Check IC4 pin no 38 .
Yes
9. Is the DSP is normal? No Check IC1 Data Bus .
Yes
10. Is the Audio out is normal? No Check Audio out circuit ( CNP13A Pin No.1 and 3 )
Yes
11. Is the Video out is normal? No
Check Video out circuit ( IC1 Pin No.211, 218, 219 and 221 )
Figure 2
Figure 1
Figure 3
2
9
IC6
6
7
Figure 4
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