cheap sony cd player - Page 4

baggins · 30th March 2006, 04:59 PM

I know this may sound strange after all this time but-- i think Ive located the turning ( dichroic) It wasnt quite where I was expecting it ,it was smaller than I was expecting , It was dirty and the coating reduced its reflectivity even further.So it wasnt until I shone the beam from a dinky little led bulb inspection light i've knocked up in below the focus lens that I caught a glimpse of it.Any way Ive cleaned it with a sort of mini cotton bud made with a cocktail stick and half the head of a normal cotton bud.

But it still refuses to recognise a CD.!!
I am still of a mind that there is maybe a(collimating?) lens missing from between focus lens and the newly discovered Dichroic. This is all of purely academic interest as it came as part of a batch I bought and it owes me nothing ,except the fun of making it work.

anatech · 30th March 2006, 05:01 PM

Hi baggins,
It wouldn't surprise me if "things" fell out of the head. The lens in the Pioneer units used to fall out often. Carefully gluing them back in saved many customers the cost of a new one.

Cleaning the mirror, use only compressed air or possibly fluid followed by air. It doesn't take much to move them out of position sometimes.

-Chris

baggins · 30th March 2006, 05:06 PM

There seems to be a cup shaped recess below the focus assy. which has no purpose other than to maybe hold something.Were the panasonic lenses spherical on their lower surface?

anatech · 30th March 2006, 05:46 PM

Hi baggins,
Sorry, I couldn't tell you. Is it Mitsumi or Matsushita?

-Chris

baggins · 30th March 2006, 05:56 PM

OOPS

I meant pioneer !!! (the ones you replaced in their seats)

anatech · 30th March 2006, 06:00 PM

Hi baggins,
Ahhh, those were convex on the outside, concave on the inside with a mounting lip.

-Chris

baggins · 30th March 2006, 06:23 PM

hmmm.

Interesting and did they fit in a dished recepticle below the focus assy. or were they part of it?

anatech · 30th March 2006, 06:58 PM

The lens was fitted to the focus / tracking assembly. The entire head was mounted up side down with a theramally sensitive glue.

Let's play ... what happens next?

-Chris

baggins · 30th March 2006, 09:41 PM

Let's play ... what happens next?

Huh ? is this canadian humor?

anatech · 30th March 2006, 10:03 PM

Hi baggins,

Quote:

Huh ? is this canadian humor?

Sadly, yes. It's also a valid question with a rather obvious answer. What would you think is going to be the result of this situation?

-Chris

30th March 2006, 04:59 PM	#31
baggins diyAudio Member Join Date: Jan 2006 Location: haverfordwest,pembrokeshire	I know this may sound strange after all this time but-- i think Ive located the turning ( dichroic) It wasnt quite where I was expecting it ,it was smaller than I was expecting , It was dirty and the coating reduced its reflectivity even further.So it wasnt until I shone the beam from a dinky little led bulb inspection light i've knocked up in below the focus lens that I caught a glimpse of it.Any way Ive cleaned it with a sort of mini cotton bud made with a cocktail stick and half the head of a normal cotton bud. But it still refuses to recognise a CD.!! I am still of a mind that there is maybe a(collimating?) lens missing from between focus lens and the newly discovered Dichroic. This is all of purely academic interest as it came as part of a batch I bought and it owes me nothing ,except the fun of making it work. __________________ heretics are sometimes right

30th March 2006, 05:06 PM	#33
baggins diyAudio Member Join Date: Jan 2006 Location: haverfordwest,pembrokeshire	There seems to be a cup shaped recess below the focus assy. which has no purpose other than to maybe hold something.Were the panasonic lenses spherical on their lower surface? __________________ heretics are sometimes right

30th March 2006, 05:56 PM	#35
baggins diyAudio Member Join Date: Jan 2006 Location: haverfordwest,pembrokeshire	OOPS I meant pioneer !!! (the ones you replaced in their seats) __________________ heretics are sometimes right

30th March 2006, 06:23 PM	#37
baggins diyAudio Member Join Date: Jan 2006 Location: haverfordwest,pembrokeshire	hmmm. Interesting and did they fit in a dished recepticle below the focus assy. or were they part of it? __________________ heretics are sometimes right

30th March 2006, 09:41 PM	#39
baggins diyAudio Member Join Date: Jan 2006 Location: haverfordwest,pembrokeshire	Let's play ... what happens next? Huh ? is this canadian humor? __________________ heretics are sometimes right


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30th March 2006, 05:01 PM	#32
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi baggins, It wouldn't surprise me if "things" fell out of the head. The lens in the Pioneer units used to fall out often. Carefully gluing them back in saved many customers the cost of a new one. Cleaning the mirror, use only compressed air or possibly fluid followed by air. It doesn't take much to move them out of position sometimes. -Chris

30th March 2006, 05:46 PM	#34
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi baggins, Sorry, I couldn't tell you. Is it Mitsumi or Matsushita? -Chris

30th March 2006, 06:00 PM	#36
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi baggins, Ahhh, those were convex on the outside, concave on the inside with a mounting lip. -Chris

30th March 2006, 06:58 PM	#38
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	The lens was fitted to the focus / tracking assembly. The entire head was mounted up side down with a theramally sensitive glue. Let's play ... what happens next? -Chris

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