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Old 27th March 2006, 11:50 AM   #1
baggins is offline baggins  United Kingdom
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Default cheap sony cd player

Does the CMT-EP30 laser use a 90 degree turning block
I,m trying to service one that says "NO DISC" so I stripped the sled but can't locate any block under the lens Is it missing? or is this an axial type laser?The laser is visible when searching for disk.The disc boss was pushed down on its shaft so its had a good knock at some time.
How critical is the height setting?
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Old 27th March 2006, 01:53 PM   #2
anatech is offline anatech  Canada
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Hi baggins,
Disc table height is very important. The laser head has a diffraction grating. The beam needs to be split to the pickup diodes.

Many times the disc table will drop by itself (plastic on a metal shaft). There was not necessarily a hard knock to the machine.

-Chris
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Old 27th March 2006, 03:02 PM   #3
baggins is offline baggins  United Kingdom
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So when the player does its initial cd seek routine i.e.

Lens up and down - sled in and out .

The disc height still has to be within microns for the laser to read it?
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Old 27th March 2006, 03:11 PM   #4
anatech is offline anatech  Canada
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Hi baggins,
No, but there is a specified focal distance. The table must be at that correct height (given in mm). You may need to measure another one with the same laser assy.

Sorry, I am not familiar with that one. Not enough to give you the measurement. A warranty shop may help you out if you get the right guy.

-Chris
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Old 27th March 2006, 04:57 PM   #5
baggins is offline baggins  United Kingdom
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I,m mystified ,I typed in the No,s printed on the little stickys on the module and google says this is a Thomson laser assy.

why would this be in a cheapo Sony bedsit box???
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Old 27th March 2006, 05:15 PM   #6
anatech is offline anatech  Canada
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There are cheaper things than Sony mechs. I am not a fan of Thomson Consumer at all. This machine may be an "orphan".

-Chris
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Old 27th March 2006, 06:14 PM   #7
baggins is offline baggins  United Kingdom
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Whats an orphan? (in electronic terms that is)
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Old 27th March 2006, 06:47 PM   #8
anatech is offline anatech  Canada
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Hi baggins,
Ah, sorry. An orphan in the service business is a product that is not supported well. Normally due to being manufactured by an OEM. The branded company doesn't want to know about it, neither does the OEM.

The spares are sourced by finding the closest model the OEM makes to what you have. Identical in some cases. Spares and guidance are referenced to the OEM model, not the branded model.

-Chris
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Old 27th March 2006, 08:26 PM   #9
baggins is offline baggins  United Kingdom
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Is this thing a clone or grey product then - the Sony logos etc and the user manual (downloaded) seem to indicate a genuine Sony product
would they use a Thomson sled? seems rather odd to me!
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Old 27th March 2006, 08:34 PM   #10
anatech is offline anatech  Canada
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Hi baggins,
Understand that I'm only guessing here.

The OEM is Thomson, Sony bought them and branded the unit this way. This was done because the Thomson mech was less expensive than Sony's own. They did this to bring the model in at a budget price.

I don't know what technical support would be like in this case, or spares support after the fact. So you have a Sony unit that was manufactured at least partially by Thomson.

In my experience, all types of support would be well below the normal average, from Sony in this case. In warranty support might be replacement only.

-Chris
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