Dritb Publish time 2019-01-11 07:28:08

D-100 spindle motor over speed

Hello,

I have a D-100 which over speeds on startup and then turns off. Actually I have two D-100s with the same problem?
It is not registration as I have checked those.
Any thoughts? Is the IC505 to be replaced? How to check?

Regards,

kaosun Publish time 2019-01-18 08:32:02

Over speed on startup is normal. It always means no disc is detected. Please perform standard inspection:
1: Hold door switch,
2: Press play;
3: Laser lens focus up and down for 3 times;
4: Red laser beam emits.

Ordinary, focusing coil breaks or laser issue.

Dritb Publish time 2019-01-18 09:30:11

Thanks for the reply.
The laser works. The lens goes up and down several times and it emits red light.
I even changed the pickup with one I know it works, and still the same symptoms.

I made some measurements and I get 5.5v on IC505 pin 14 instead of 1.2v max, and 0.6v on IC503 pin 7 instead of 2v.

kaosun Publish time 2019-01-22 07:57:50

static/image/common/user_online.gif Dritb static/image/common/clock.gif 2019-01-18 09:30
Thanks for the reply.
The laser works. The lens goes up and down several times and it emits red ligh ...

Pls check the DC-DC power adapter part, does it output +5V and -5V? You can trace them by referring SM.
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