Question about Toshiba Sony CDX454RF CD Changer

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Tuning problems I have two things happening. When I shut my car off the changer stays on. It never did that before. Also, the changer is set to 88.5 frequency. When my radio is tuned to that frequency it no longer works. For some reason the changer works somewhat when my radio is set at 97.5, yet the changer is still set for 88.5. This just started happening out of the blue. Any ideas?

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  • riley-mac Aug 23, 2007

    You may have something with the "humidity, teperature etc.;". It has been unseasonably hot and humid and we've recently had the worst flooding conditions in nearby areas, that have occurred in the last 100 years. Is it possible that this might "self repair" when we get back to a normal humidity range?

    I think its odd too that the shut off trigger would go bad at exactly the same time. Could that be weather based as well?

    How much should the type of inshop repair you are talking about cost? Can you give a ballpark figure? Any suggestions on where to take it?

    Thanks greatly.

  • riley-mac Aug 24, 2007

    Thanks for the info. This was worth the ten bucks just to know what's going on. You've been great and your help is greatly appreciated!



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Hi, This sounds like an inshop repair. The technical term for the changer being set to 88.5 but works in 97.5 is "frequency drift" and could be rectified with the use of a calibrating instrument/frequency counter and an alignment tool assuming no component replacement required. Frequency drift can be caused by component failure, humidity, temperature etc.; The part "my car off the changer stays on" could be faulty trigger on inside the changer, faulty remote trigger on in your head/radio/controller unit. Good luck and hope this gives you a few ideas. Kind regards.

Posted on Aug 23, 2007

  • Louie  Role
    Louie Role Aug 23, 2007

    Hi again,

    Re the"self repair" depends really on the extent of the moisture that seeped in and dried out leaving residue in the electronics. The actual repair would involve cleaning/removing any of its traces before calibration or parts replacement. I doubt if any major component is to be replaced. The unit is still working (except at 97.5). Chances are that the dried up moisture has significantly changed the value of a component and cleaning hopefully would restore it, then calibration.

    Re "I think its odd too that the shut off trigger...." not really. The trigger is also electronically controlled and driven. What ever caused the transmit to drift to 97.5 could and can cause the trigger to power on even in the absence of a real trigger. It's what we call "false sensing."

    Re "How much should the type of inshop repair..." can't help you there, am in the Philippines and don't have any idea where you are nor the reputable service shops close to you.

    My concern really is not the inshop repair, before it can be repaired, the unit has got to be removed from where it is installed in your vehicle, then will be repaired and then re-installed and others charge separately for that.

    If you feel adventurous, maybe you can do it yourself, triple R; removed, repair,reinstall. You would need a couple of tools to remove, aeresol contact cleaner for the electronics cleaning of residue, your ear and radio for the tuning and your eye for the trigger false sensing. If everything goes according to plan, you reinstall.

    or maybe let it be and wait till it fails completely. You pay the same remove/reinstall fee whether the repair is expensive or not. I doubt if the repair is expensive since you have a fair idea of the trouble and no components are to be replaced. So defer till really needed. You can bypass the false sensing/trigerring by cutting off all the power that goes to the changer and make do with 97.5 at least for the time being.

    Your choice, cheers.

  • Louie  Role
    Louie Role Aug 24, 2007

    Thanks for the kind words and glad to be of assistance. It will also be appreciated if you can rate this session as you see it fit.



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