Question about Panasonic SC-AK240S Shelf System
When powered on it plays for a couple of seconds and then automatically powers off by itself displaying f61. I have tried unplugging and let stay before plugging back, but does same thing. Can someone please help with a solution.
Several components in the power supply maybe faulty, especially Tranisitor Q5110, Resistor R5114 and Diode D5102 on the power supply board. Check and replace these and also resolder the regulator IC's on the heatsink.
Posted on Jan 17, 2008
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Posted on Jan 02, 2017
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Mar 16, 2011 | Panasonic Audio Players & Recorders
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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