Re: Correct laser diode current for Onkyo DX-6550?

From: Zeljko (zeljko.hrvoj_at_zg.htnet.hr)
Date: 06/24/04 

Date: Thu, 24 Jun 2004 15:58:34 +0200

"LASERandDVDfan" <laseranddvdfan@aol.com> wrote in message
news:20040622011524.16860.00000214@mb-m20.aol.com...
> >I see now - it has no current specified! There is no adjustments of laser
> >power either.
>
> Ouch! This is kind of unexpected from an Onkyo, especially their Integra
line,
> and a model that uses a linear tracking motor instead of the traditional
kicker
> mechanisms according to your observations.

I searched again - no mention of it under adjustments. In schematic, no
voltage reading on current source for LD. Under replacement, nothing...

> So this means you got your CD player working again? If so,
congratulations!
> They certainly don't make CD players like that anymore unless you are
willing
> to spend big bucks (although an Integra model CD player usually did cost
big
> bucks). - Reinhart

I was surprised too. Internal cleaning of pickup is crucial if possible.
I had this experience in two occasions. During my work for Sanyo on
low-low-end Sanyo CD players in musical centres. Ventilation air blows over
the cd. Micro-dust finds it way into the pickup somehow. Raising of laser
power works for some time, but if You clean it internally, customer don't
come back. Of course we blocked ventilation air also. New pickup also gets
dust in short time.
Other occasion is one Sony MDS JA3ES. They also said that pickup needs to be
changed. Precise cleaning of lens from up and down solved the problem.

It's already in the wild. Today customer called me that it works nice.
And he bought it for few tenths of euros...
...plus my humble fee.

Zeljko

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