Question about RCA RS2652 Shelf System
Ive had my RCA 5-CD Shelf System, RS2654 for a little over a year it worked perfect till bout 3 weeks ago the fuses blew so i went and asked the company what to do they said go to radio shack and buy replacements but when i installed them they blew instantly and now i cant reach the company so i figured id go up some wattage so i bout some that could hold more watts but even they blew could you tell me whats wrong and or how to fix it or at least what i should do??
I traced the portion of the circuit involving the fuse
and failed resistor. Fixed the problem by replacing R886 with a 1.2K, 1/2 W
resistor, a zener diode that had heated the circuit board and tested bad with a
15 volt, 1 watt zener and replaced the blown axial lead 1.5 amp fuse. I also noted a jumper missing
that would connect the common of the circuit with the failure to the main ground
of the rest of the board. I installed the "missing" jumper thinking that this was probably the root cause of the problem.
With these repairs the RS2654 has worked fine for many hours.
Posted on Mar 18, 2009
Never ever replace a fuse with a bigger one, you are lucky the unit did not blow up and statrt a fire. When a fuse blows there is usually a reason.There is a short in the main power supply or the output stage. You will need to test for shorts on the main transformer, B+ rectifiers and the main filter capacitors. If that does not show any shorts, you will need to test the audio output circuits for shorts on the audio output IC's. Good Luck
Posted on Mar 22, 2007
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