My neighbour brought to me this DVD receiver
to my shop for repair a few days ago.
I did my usual initial test by connecting it
to the power outlet even before opening it.
I noted the machine was powering on briefly
and then shutdown, with this I concluded that the machine is getting powered
but shutting down due to overload somewhere within the system.
With this in mind now it is time to open up
and find out where the problem is.
Back side of the machine
I
opened up the set and here is the internal parts of the system.
After opening the machine now it is time to
do initial tests which in my case I usually start by checking for any suspect
component or area which manifest any sign of stress.
I started with the main power supply
(S.M.P.S) primary side and everything looked OK.
Next I scanned the secondary side and I
almost gave it a clean bill of health until I came across two capacitors with
the top slightly swollen.
The owner was still around and after seeing
those two capacitors I now decided to give him the repair estimate just in case
I replace the two components and the machine works!
It is always important to agree with the
owner the total charges otherwise some will have problem paying the total
charges once it works.
He agreed and luckily I had the replacement
in my store and I replaced the two capacitors with the same value but higher
voltage rating.
The capacitors which rated 1000uF/16v were now
reading 692.2 uF (capacitance) and ESR of 2.1 ohms.
After replacing
the two capacitors now it was time to apply the power and see if there is any
change and to my surprise the DVD receiver was up and running.
The owner was
still around and this brought a smile on his face and also for me I was happy
to the task accomplished.
In case you want
to go deeper in hometheater repair here is the book I recommend this book, Click on the book cover for more details.
Thanks for sharing. I also have a problem with power supply that causes the radio to fail to increase speaker volume. But so far I havent been able to see any sign of physical damage to the components.
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