Question about Panasonic SC-AK300 CD Shelf System
Whats wrong is that whilst the power amplifier is running and the system fan fails due to internal resistance of the fans resistor the main power amplifier overheats causing the main power NPN transistors to turn off the system power by the use of a logic AND gate that causes the error code F61 to appear and turn off the systems power supply. The solution is simple the main transistors are removed carefully and their terminals are shorted using a screw driver. the transistors contains a little voltage which activates the AND gate to shut off the power supply and the error F61 appears. make sure the transistors are replaced correctly and solder very light. If the problem still occurs provided that all transistors are fully shorted(all three terminals) and properly replaced then the radio should be taken to a professional
Posted on May 23, 2008
Isolate problem by disconnecting Amplifier ic (RSN),if f61 still appeares after disconnection of RSN ic ,than check voltage supply rails ,may be one of them has irregularities.
Posted on Dec 14, 2007
SOURCE: How to fix F61 error?
First re solder any dry joints on Transistors Q502, 504, 507, 515 & CN500, IC501. If there are no dry joins replace IC501 (STK470-0??) & maybe D501 (16.V) zener
Posted on Feb 26, 2010
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