20 Most Recent Niles ZR-4630 2 Channels Receiver Questions & Answers

Power cycling?!?!? Are you serious?!?!? Do you work in tech support?? Power cycling , what a genius.

You hear a couple of clicks that is the indication of loose contact or cold solder parts joint. The common causes circuit problem is cold solder or loose connection that why the machine function abnormally and it causes the machine to overheat and the receiver is in protect mode then error display come out. A cold solder joint is where a lead of a component is not soldered at a high enough temperature and results in a bad electrical connection which can respond to physical shock and thermal stress. When you open the receiver look on the front and back of the board along the defective circuit to see any components that look like they are not soldered effectively or the solder connection is cracked or broken. A cold solder joint looks dull and/or bulging unlike the smooth and shiny normal solder joints. Each component parts are soldered into small holes on the printed circuit board which in turn connects said component to the other components. Due to time, heat, use, some solder joints would be cracked or loose. It is possible that the cold solder is still minimally connected (hanging by a thread). When the receiver turns on heat would be generated which would be sufficient to further loosen up the solder joint to the point it no longer provides electrical contact. Jarring the unit creates movement inside enough to re establish the contact, sometime good enough sometimes not enough. Again, since the unit still operates (sometimes) then it is highly probable that there are no defective components. As you have surmised, it is possibly a loose connection. Its better you re solder all components parts joints in power supply board and also in audio power amplifier section board input /output. Again on the assumption of no defective parts, then seeking a more experienced buddy for the soldering might be to your advantage. This is of course in addition to the possible electrical hazards when repairing. If you're not experienced with troubleshooting and repairing electronics, I strongly suggest look for professional service or bring it to authorized electronic repair shop. Good luck? Regards: VOTIT

Hi,

It seems like a blown fuse. Do you know how to open up the unit?

Thanks for the update. Did you try power cycling the unit?

the sps one is a passive device, the protection circuit is and attempt to protect your amp from very low impedance when you have mulitple speakers attached. The Protection circuit switches in a 2.5 ohm resisitor in series.If you where to connect 4 sets of 4 ohm speakers to this unit and not push in the protection switch you amp would hate you and hopefull just trip the over protection in the amp. When you push in the protection switch you add 2.5 ohms to the circuit. So with four 4 ohm speakers your load would be 3.5 ohms. The device is rated for 100 watts of music power. The only thing inside the unit is switches and the two resistors mention above. So not much to go wrong with the unit. If you have shorts, and not open wires it is more than likely related to the user wiring on the back of the. First make sure that all of the wires are trim to size to fit in the small terminals and you do not have any flying leads when they are inserted. Also make sure that each speaker wire polaraity is correct. If it still does not work then you will have either a open resistor, that is apparent when it does not work and the button is pushed in. or a bad switch, Or you have way overload the unit and burn off a track on the pcb.