No Sound In Sony Hi-Fi Solved
This Sony Hi-Fi System came in with the complaint of no sound but other features seems to be working fine. I took out my old speaker and connected it to the output jack and there was still no sound. This means this no sound problem was not due to bad speakers.
All the setting were good and even the volume already tuned to maximum and the sound refused to come.
I opened the cover and head straight to the main board and made sure the dc voltages are present. In deed there were good DC voltages in the mainboard. I can check the audio IC dc supply voltage first but this article is to let you know about the procedure of troubleshooting.
Next, I checked the DC supply voltage to the audio sound IC. Again the DC voltage were present.
In fact for this model I had replaced some audio ICs already and it worked fine.
I took my rework station and heat up the IC and removed it.
I have some spare good ICs with me and I replaced it
After soldering the IC, I cleaned the audio IC with cleaning solution and powered up the unit. The sound came back as expected.
Conclusion. Assuming if after replaced the IC and still no sound then I have to check the incoming and outgoing signal waveform already.
This article was prepared for you by Suranga Bandara who owns an Electronics repair shop in Anuradapura, Sri Lanka.
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