I have a Motorola DCP 501 Everything seems to work except the clip type speaker hook-ups no faults displayed

Switch the amplifier 'ON' with its power ON/OFF switch; and listen whether there is a relay cliking sound after 10 seconds or so after switch ON. This amplifier has a delalyed output circuit, which will energize all the speakers after a pre-determined time [10 to 15 seconds normally]. You can hear its 'click sound' after this predtermined time. If there is is any short circuit this wound will not be there, and the amplifier go to protection mode. Just unplug all the speakers and do this test. If there is no such 'click' sound heard, the delay circuit inside your amplifier is faulty and need service. This is not a user repairable one. Inform me after this check. OK Switch the amplifier 'ON' with its power ON/OFF switch; and listen whether there is a relay cliking sound after 10 seconds or so after switch ON. This amplifier has a delalyed output circuit, which will energize all the speakers after a pre-determined time [10 to 15 seconds normally]. You can hear its 'click sound' after this predtermined time. If there is is any short circuit this wound will not be there, and the amplifier go to protection mode. Just unplug all the speakers and do this test. If there is no such 'click' sound heard, the delay circuit inside your amplifier is faulty and need service. This is not a user repairable one. Inform me after this check. OK

The unit has some trouble with its internal audio output circuit. It goes to protection mode as you reports. The main reason for this fault is short circuit in the output section; whic cannot be predicted to which component inside has the trouble. The set needs a through checkup to its audio output section. This is actually a very skilled job, must have measuring equipemts and experience in servicing such high-watt amp systems. It will be best for you to get it repaired by any trusted technician you know well, of by its authorised service center. Most of technicians can do this work, as all amplifier circuits will be similar in nature, but have some minor differences in circuit and component locations. Never connect speakers again to this set, as it may damge the voice coil of the speakers too. Connect it after the fault has been rectified. OK. The unit has some trouble with its internal audio output circuit. It goes to protection mode as you reports. The main reason for this fault is short circuit in the output section; whic cannot be predicted to which component inside has the trouble. The set needs a through checkup to its audio output section. This is actually a very skilled job, must have measuring equipemts and experience in servicing such high-watt amp systems. It will be best for you to get it repaired by any trusted technician you know well, of by its authorised service center. Most of technicians can do this work, as all amplifier circuits will be similar in nature, but have some minor differences in circuit and component locations. Never connect speakers again to this set, as it may damge the voice coil of the speakers too. Connect it after the fault has been rectified. OK.