On Mon, 01 Oct 2007 14:46:54 -0700, Emanuele Girlando
put finger to keyboard and composed:

Inserting disks you obtain "READING" message for a long time. Then "NO
DISK".

Inside inspection (as per FAQ):
the spindle motor correctly runs.
Sled doesn't move unless you manually move it to a different location;
it correctly comes back to the original position. It is correctly
driven.
Neither attempt to focus nor laser light up are performed (dead
pickup).
Removed/cleaned/remounted the pickup flat cable: no change.
The lens servo works if manually powered (lens goes up and down)
The laser lights up if manually powered.
Power supply voltages are as per onboard indications.

Seems a problem with the pickup driver circuitry.
I published a snapshot of the main board @ http://www.qsl.net/iw1dhi/pickup-driver.JPG.
Any idea about what to check further? Any information about test
points?
Any picofuse around??

Thanks in advance.
Emanuele.

I don't know anything about your model, but I'd check the AM5868S
driver IC. There is an application circuit in this datasheet:
http://www.amtek-semi.com/files/AM5868.pdf

Verify the inputs coming from the uP and check Vcc1 and Vcc2.

I'd also look for a tray-in/tray-out switch at one of the connectors.

- Franc Zabkar
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