One of my Customers of my latest ebook
on DVD repair Mr. Beh from Iran send me this repair report.
DEAR MR KIMATHI
First of all thank you for your all
good information that I got from your book DVD PLAYER REPAIR GUIDE in
assisting me to repair my DVD player.
After 7 years of hard work my
faithful DVD PLAYER TBCO MODEL 9030 failed to work?!
LCD display panel of DVD gave me
ERROR and this indicates something serious has happened inside the machine. By studying
your book now I am armed with knowledge on what to do and where to go inside
the DVD player.
After opening the cover of DVD and beside of dc output terminal I found all
proper voltages that must be go out of the board so I check them all Four dc
voltage were present as follows 3.3+, 5+,
9+, and 9- volts.
The 5+ and 9+ volts output were stable
but 3.3 + was 3.49Volts which is strange and therefore suspected something
was wrong on the power supply.
I took the voltages with a very
precise digital voltmeter from the 3.3 + volt pine of terminal checking all the
components on the line.
In the way back on the PCB I found a
cap with 1000 micro by 10 volt which my escort capacitor checker find out that
the value of capacitor is changed value to
800 uF but ESR of capacitor was more
or less good. Also on that line there was a big schotheky diode SR 306. 60 v-3 A
was connected to this electrolyte capacitor.
I tested this diode with my analog
ohmmeter set to 10Xk and was found
leaking and therefore needed replacement.
I replaced the diode with SB560 60V -6A
and a new capacitor and the ERROR disappeared from LCD Panel and DVD return
back to life
This article was contributed by Mr.
Beh.
An electronics repairer based in
Tehran in Iran
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