VIKYNO 20” LCD TV Repaired
The complaint of this TV was no TV Channel Tuning (you can’t search for any TV channel) but can work on the VGA port. This means you can’t tune to any TV channel. Since other interface can work this clearly suggest that the tuner box and related circuit could be the problem.
This first thing to do is to check the DC supply voltage to the Tuner box. You need to power up the TV in order to check the DC supply with your voltmeter. From the test I found that the DC supply was zero volt. This is the cause of the no TV channel tuning problem.
I had to trace from the DC supply pin point and to see where the problem is. Finally I found a path that was broken-see the photo below.
Making a new path using wire solved the problem. I got about 31.1 Volt.
Look at the TV channel below:
This article was prepared for you by Suranga Bandara who owns an Electronics shop in Anuradapura, Sri Lanka.
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