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Annoying intermittent sound problem - Rockola
I hope someone can help me with an extremely annoying problem I am
having with a Rockola 443. The problem is the sound keeps cutting out but there seems to be no pattern at all to this. For example it might work okay for a while when it is turned on then the sound will stop, other times it will select okay when turned on but no sound then at some point the sound will start. I think the amp is okay, checked across the filter caps for voltage and at any time I will get hum through if I touch the cartridge inputs. The cartridge is okay also as is the mute relay. The strange thing is that if a selection is playing with no sound I can make the sound return by: Twisting a lamp so that there is a crackle through the amp Sometimes making another selection (after the number button is pressed the sound starts) Playing with the connectors (although a different connector each time - not one specific connector) When I do one of these things the sound might come back on for quite some time then drop out or it might only come on for a short time. Sometimes it will come on crackly and low volume other times it will be clear and normal volume. Could this be some sort of grounding problem or something? I hope I have explained this okay, even though I am a novice I just can't narrow down what it might be or where to start. Really hoping someone might be able to point me in the right direction. Paul Smith Australia |
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Paul, first place I would check would be the connection to the
cartridge and then the plug in for the tone arm wire. Sometimes the metal becomes tarnished and does not make a good connection. Clean the plug very well. RockolaScott (baraka) wrote in message . com... (Paul Smith) wrote in message . com... I hope someone can help me with an extremely annoying problem I am having with a Rockola 443. The problem is the sound keeps cutting out but there seems to be no pattern at all to this. For example it might work okay for a while when it is turned on then the sound will stop, other times it will select okay when turned on but no sound then at some point the sound will start. I think the amp is okay, checked across the filter caps for voltage and at any time I will get hum through if I touch the cartridge inputs. The cartridge is okay also as is the mute relay. The strange thing is that if a selection is playing with no sound I can make the sound return by: Twisting a lamp so that there is a crackle through the amp Sometimes making another selection (after the number button is pressed the sound starts) Playing with the connectors (although a different connector each time - not one specific connector) When I do one of these things the sound might come back on for quite some time then drop out or it might only come on for a short time. Sometimes it will come on crackly and low volume other times it will be clear and normal volume. Could this be some sort of grounding problem or something? I hope I have explained this okay, even though I am a novice I just can't narrow down what it might be or where to start. Really hoping someone might be able to point me in the right direction. Paul Smith Australia Paul, Try checking your ground in the machine to ensure that it is o.k. I don't have a Rockola as I only have a Rowe CD100 jukebox. However, I could tell you to this. Check your connectors to see if any are burnt. Secondly, re-seating connectors may cure your problem. Post your results.. John |
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Well this certainly sounds like quite an odd problem. Telling me that
sometimes it comes back on with the crackle of the flouresent light or a selection being made brought only one thing to mind, and this is dependent that you are correct that it is the flickering of the bulb, and not any vibration that sometimes makes it work. The speaker overload circuit. I've had trouble with them only a handfull of times, but it is a sesitive circuit and could possibly be affected by small voltage spikes from the light lighting or the solenoid action of the selector enough to make it work again. I hope you have and can read the amplifier schematic, you will need it! -- Tony Paul Smith wrote: I hope someone can help me with an extremely annoying problem I am having with a Rockola 443. The problem is the sound keeps cutting out but there seems to be no pattern at all to this. For example it might work okay for a while when it is turned on then the sound will stop, other times it will select okay when turned on but no sound then at some point the sound will start. I think the amp is okay, checked across the filter caps for voltage and at any time I will get hum through if I touch the cartridge inputs. The cartridge is okay also as is the mute relay. The strange thing is that if a selection is playing with no sound I can make the sound return by: Twisting a lamp so that there is a crackle through the amp Sometimes making another selection (after the number button is pressed the sound starts) Playing with the connectors (although a different connector each time - not one specific connector) When I do one of these things the sound might come back on for quite some time then drop out or it might only come on for a short time. Sometimes it will come on crackly and low volume other times it will be clear and normal volume. Could this be some sort of grounding problem or something? I hope I have explained this okay, even though I am a novice I just can't narrow down what it might be or where to start. Really hoping someone might be able to point me in the right direction. Paul Smith Australia |
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