Question about Sharp CD-DD4500 System

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The rotary cooling fans run constantly, even with power OFF.

The 2 rotary cooling fans in the stereo run constantly, even with the power turned OFF. Is there a sensor that is bad and thinks that the unit is too hot? Is there a do-it-yourself fix for this problem? I am planning to replace the fans because they are very noisy (I suspect they are on the verge of wearing out).

Thank you in advance.

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  • erict197088 Nov 05, 2008

    Sharp stereo model # CD-DD4500. Great stereo...

    Fans are worn out due to constant running. They are probably designed this way to keep the unit cool as there is power to the system at all times while plugged in. Fine with me, but I need to find replacement fans for this stereo. Anyone have a link for this type of replacement parts? The fan motors have RF-310T-11400 on them. Thanks for the help! ET

  • tinkerer314 Nov 25, 2008

    I found the replacement fan motors on-line but do not have the info with me at this time. I will post it as soon as I can. The fan motors were about $34.00 apiece. You will need to remove the current wires and solder the connections to the new motors.

  • tinkerer314 Nov 25, 2008

    The site for the parts is Partstore.com (1-866-925-7278). Part #: aa-rmotv0027awzz. It is listed on page 9 of the parts list for the Sharp cd dd4500. The motor is listed at $17.02. I replaced the fan motors and the silence is golden!

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I have the panasonic stereo system SA-AK 1B and I'm recieving the F61 error message whenever I attemptto turn it on. Then it immediately turns itself back off


F61 usually means the amp has detected a short or a severe microprocessor error.


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

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My panasonic sa ht930 is well connected and the subwoofer is on but the stereo dont turn on


Is it refusing to turn on or incapable? Did it ever work before? If not, check your power source.

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Check for loose speaker connections at the speaker as a root cause for intermittent shutdown.

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When i turn the stereo on it only goes on about 2 seconds n then it says PROT on the panel and turns off


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F61 usually means the amp has detected a short.


Generally speaking, an amp protects itself from heat, shorts and overloads by refusing to turn on or stay on.


Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.


Check for loose speaker connections as a root cause for intermittent shutdown.

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Page 32 of the manual:

http://www.retrevo.com/support/Samsung-HT-Z510T-Home-Theater-Systems-manual/id/14714ci454/t/2/

Cooling Fan


The cooling fan supplies cool air to the unit to prevent overheating.

Please observe the following cautions for your safety.

Make sure the unit is well-ventilated. If the unit has poor ventilation, the temperature inside the unit may rise

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Do not obstruct the cooling fan or ventilation holes. (If the cooling fan or ventilation holes are covered with a
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You don't exactly define what "cuts out" means.... silence, protection or power off?

What makes you think it's thermal in nature?

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