Hello Humphrey! Your book on DVD player repair guide has
made me to learn new hints how to solve problems related to DVD switch mode
power supply (S.M.P.S).
Now I received a DVD from my friend which had power problem
.When I opened the casing I noticed the fuse 2A/250V was dark inside. I removed
it and connected a 100W bulb across the fuse and it was too bright and no
voltage across the main capacitor 10uf/400v.
After thorough diagnosis all the diodes were o.k. even the
thermistor, This small power supply uses an I.C viper22A I unsoldered it and
replaced with a new one and applied power again, the bulb lit momentarily the
went off.
At the output I measured the voltages and I could get
12v,-12v and 5v so then I unsoldered the bulb and replaced it with a fuse and
the DVD was now on.
I loaded a disk and it played so well. The following day I
called the owner to collect it. After one day the owner told me after
collecting he played only one cd well the loading another one it spins for so
long then it displays no disk Though I have to take it again but my question is
could be a lens or motor problem?
Hi Justus,
Most likely the spindle motor... But you can test this
easily using analogue meter set to X1, if the motor is okay it should spin very
fast and read between 5 ohms and 20 ohms.
All the best Justus
Regards Humphrey
Hi Humphrey,
Indeed even by rotating the DVD motor with my figure it
spinned slowly and unevenly, taking the ohmmeter using analog meter set to x1,
no reading at all . Now I decided to remove the motor from my own working DVD
then replaced to the other DVD now it’s reading CDs! missions accomplished.
Congratulations... Way to go Justus.
Regards Humphrey
Great blog post
ReplyDeleteThanks and welcome Arnold. Cheers!
DeleteRegards Humphrey