I got a second misgurnus

 

My Celsior has a CD unit which doesn’t work for sometime now. I happened

to succeed to fix the broken door lock / unlock actuator the other day and the

next project I am in a mood to do is the CD unit. Removing the unit and

opening the upper cover of it, I found the spindle motor not working.

But putting my finger to help to rotate the CD, it worked and the sound was

coming out from the speakers properly.

 

I measured the voltage at the motor and it was around 5V. When a CD was

rotating by the aid of my finger, it was around 1.7V. It looked like the motor

drive circuit was alive. Only the motor was half dead. It did not have enough

initial torque to start up to rotate the CD.  I wanted to replace the motor but

it was not easy to obtain.

 

What I thought was to try to investigate how the motor was half dead. I tried

to see the inside but it was not as easy as the one used for the door. The

motor rotated some and it worked almost fine with my finger's aid. What made

the situation like this?

 

 

As I saw the top cover of the motor, there were 4 holes, and I decided to blow

the compressed air to them each. I tried so and I noticed some black dusts

were coming out of other 3 holes while the compressed air was applied.

Doing this repeatedly got no more dust and I tried to play the CD.

Everything worked fine.

 

I think I get a second misgurnus. A misgurnus? The prime minister of Japan

Mr. Noda has a nickname Misgurnus. What I mean here is not to get him twice

but I mean to say I get something precious twice lately using the same idea.

In Japan we have a saying, “ The second misgurnus under the pillow tree is

not there any more.” May be you don’t understand this well enough. In English,

there are similar proverbs like, ”A fox isn't caught twice in the same snare.”,

“There are no birds of this year in last year's nest.”

 

The proverb is not always correct, I understand today.