Wentai DVD Player Repaired
This DVD Player brand WENTAI Model: DVD-3031, China made was brought to me from a co-worker because it was fully dead.
First thing was to disarm it.
And check the Power Supply Unit voltages.
As you can see in the photos above there was AC mains (110 volts in my country) and there was voltage-out in the Power Supply Unit (5 volts in this case).
This means the power supply was good! Anyway the PSU was extracted and checked to look for any cold solder joint, bad e-cap, etc.
Everything was ok, so the search had to be continue in the mainboard. In this mainboard I found two leaky semiconductor diodes (1N4004: Plastic Silicon Rectifier).
The diodes used for substitute the bad ones were 1N4007 (recovered from another PCB).
They were soldered back to the mainboard and when the appliance was turned On, look at the result in the photos below.
Wow! The DVD Player really turned On perfectly and the owner was very happy.
This article was prepared for you by Humberto Rodriguez, one of our ‘Master Authors’ from Cuba.
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