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Philips DVD Home Theater System Repair
Customer sent to me this Philips DVD Home theater system with the complaint of Standby problem. First, you can turn on the power but after that it will revert to standby.
From experience, it may be the problem of bad mainboard or the Main amp fault. I had to removed the cover to show you the boards inside this DVD. See the photos below:
In order to know if the Main amp fault or not, i had to pull out the cables connected to this board and power On-see the photo below:
Once the cables had been pulled out and power On, the DVD now runs normally but without sound (because I had disconnected the Main amplifier board).
Next, I had to remove this circuit board and perform troubleshooting.
I suspected the amplifier IC fault(TAS5142) because shorted IC will usually cause Stand by problem.
Below if the TAS5142 IC datasheet:
I soldered out all the three amplifier ICs as seen from the photo below:
I went to Ebay online to buy the parts and put them in and power On. The DVD now can work normally without shutting down (No more standby problem). See all the photos below:
This article was prepared for you by Suranga Bandara who owns an Electronics repair shop in Anuradapura, Sri Lanka.
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Note: You may check out previous post about fixing active speaker in the below link: