Question about Sharp CD-DD4500 System
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.
Tips for a great answer:
Jul 29, 2011 | Panasonic Home Theater System System
May 17, 2011 | Panasonic sa-ht930 Home Theater Audio...
Mar 15, 2011 | Samsung HTC550 Theater System
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.
Feb 21, 2011 | Panasonic sa-ht800V Home Theater Audio...
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
and may damage it.
Do not obstruct the cooling fan or ventilation holes. (If the cooling fan or ventilation holes are covered with a
newspaper or cloth, heat may build up inside the unit and fire may result.)
So look at the fan and make sure it's turning. Pick out the dust balls. Give the system room to breath (Page 13: 4" clearance from the fan)
Feb 07, 2011 | Samsung HTZ-510 Theater System
Dec 27, 2009 | Technics SC-DV290 System
Nov 25, 2008 | JVC DX-T9 System
Aug 18, 2007 | Yahoo YHT-630 System
54 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: