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My B225 doesn't read the TOC and the display says 00...
Have found some threads about TOC but cant read German and the Google translator doesn't agree with me logged in..
Can someone help me with tip what I can do or know what it could be?
Hi there,
generally you should describe the faulty behavior more comprehensivly.
How did the error occur, sudden or subtle ?
Did you or a potential pre-owner observe anything "unusual" before like slow reading after skip, strange noise after track change, or is the maschine just completely "new" in your possession.
Also, you should indicate your level experience with electronic/mechanic repair, including some of the tools you may have.
The B225 (and other) is prone to wear/aging of the axial spindle bearing. However, there still is an easy fix to re-align and/or replace the (plastic) bearing.
The B225 (and other) is prone to wear/aging of the axial spindle bearing. However, there still is an easy fix to re-align and/or replace the (plastic) bearing.
How do I check the wearing of the bearing? What is the easy fix?
How do I check the wearing of the bearing? What is the easy fix?
The bearing structure and its adjustment are described in the service manual you downloaded.
In brief, the spindle runs on a thin plastic disk, which is adjustable in height by means of a threaded nut underneath. Over time (even with no operation) the spindle digs or sinks into the surface of the disk, effectively lowering the CD's nominal height relative to the laser pickup. At some point the servo is no longer able to compensate this. In fact, one way to determine this problem is to measure the averaged focus servo voltage.
If you are lucky you only have to turn in the nut a little bit and you're done.
The manual gives some numbers and positions to measure.
This little dirty trick may not work in all cases, however. The reason behind is the figure of wear in the plastic disk. It is not necessarily well centered, so the "uplift" may alter the relative centering between the spindles rounded bottom end and the ditch in the plastic. This again causes the spindle to run on some sort of a slope, increasing rotational friction quite a bit.
So if you want to do a better job on this you may want to replace or refurbish the plastic disk. To my knowledge Revox no longer provides these, so you need to cut a new piece in a lathe or thelike. I'd recommend to use Delrin or similar self-lubricating material. Teflon is an option but very/too soft, so lifetime could be an issue.
You may have to re-align the bearing sometime soon until the new plastic has mechanically stabilized, i.e. has aquired sufficient enough run-in time.
actually...yes. A ˝Hi˝, ˝Hello˝, ˝God dag˝ ˝Thanks for the answer˝ etc. would be nice, don't you agree.
Nevertheless, this might help you, it's in english.
How do I check the wearing of the bearing? What is the easy fix?
Checking is easy and fixing also, take a look here and here.
The problem ist that the axle eats into the ˝bearing˝ and by doing so, the laser distance/hight is alternated. The laser can be adjusted with screwing the bearing in or out, but...because the center of the bearing won't usually corespond with the center of the axle, the groove in the bearing will be centered with the axle only in a full 360 degree turn of the bearing. Grinding the bearing plain gives you unlimited turning and exact laser adjustment. I don't now of another way to do it, as the original bearing is no longer available.
But then I press next track its take some seconds sometimes to find the next track and then starts to play, the time in the display jumps or counts before it comes to next track!? Someone ho has have the same symptom?
What I have done is, adjust the laser current, fixed the spindle bearing, set the focus DC (spindle height), changes some caps that was bad.
Time jumping and negative time reading is not uncommon for CD players using CDM-0 transport, such as B225 or Philips CD304. My question is if you have had such symptoms before or did you just get a non-working CD player which you see working for the first time.
In any case, I have had such symptoms after readjusting spindle height on my B226 and offset. Because electric values which need to be adjusted are sometimes mutually dependent, you should go through adjustment procedure again, in a sequence described in the service book. You will also notice that, after readjusting spindle height, you need to start again from setting laser current.
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