Quad67 cDP wont spin up - diyAudio
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Old 9th February 2006, 11:50 PM   #1
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Default Quad67 cDP wont spin up

My 67CDP won't spin up discs anymore.
I replaced the transport with a S/H drop in unit thinking this was the cause of the problem (as most players seem to be). Unfrotunately it wasn't this time.After loading a disc in the tray the laser unit will try to do a focus routine up/down and the arm swings a little but nothing after that.
The display then shows "Error"
I think there is something about the disc plate on the spindle that that slides down? Maybe the disc is sitting at the wrong height and won't focus?...or ???
Can ayone eleborate here? Cheers...
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Old 10th February 2006, 01:27 AM   #2
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Well, it appears that the laser is not turned on, or it is, but can't "find" the disk. Try to find the circuit diagram. Laser diodes are usually turned on to around 4 - 4.5V by uPC once the tray actuates the tray switch tray closed. So, laser ON, and if anything comes back to (usually) 6-segment photo diode array, disk will spin and TOC should come-up okay.

"I replaced the transport with a S/H drop in uni"

What's S/H drop in unit?

Cheers,
Extreme_Boky
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Old 10th February 2006, 01:37 AM   #3
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S/H drop in shotnened type for Second hand drop in replacement unit.

This was a Phillips CDM9.44, sourced from a place named Dongerg
http://www.donberg.ie/
Im hoping the unit is not dead as cost a pretty penny!!!
(If it is you will all hear about it!)

So I will need a schem to check the lines around the micro etc.

Can you or anyone help here?
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Old 12th February 2006, 04:35 AM   #4
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Got it nailed!
if any are interested (or still looking at this post )I'll put up info about it....
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Old 12th February 2006, 06:48 AM   #5
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I am intrested!

Extreme_Boky
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Old 12th February 2006, 07:15 AM   #6
poynton is offline poynton  United Kingdom
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Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)
Me too !!

Andy
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Old 13th February 2006, 06:23 AM   #7
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A couple of things. The TDA8808T ,pin 17 will supply a trigger voltage of +3.3 volts to the laser. A worn laser only exhibited about 2.5 volts for some reason and the TOC would not come up. The other thing is the turntable height. This samll disc can drop down the motor spindle causing focal problems (I think).It needs to be lifted up a little to be in best position(not too much).
The laser unit sourced ex Dongerg is all ok once this adjustment was made....hope this helps...
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