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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Sony Amplifier Problem
Hi,
A friend of mine has a sony car amp that is acting strange. The right channel will only work when the volume is turned up nearly all the way. Does anyone know what could be causing this? I switched the left and right inputs around to make sure it wasn't the head unit or cable, and it didn't seem to make a difference. Thanks Terry |
#2
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Sony Amplifier Problem
"TerryG" wrote in message
. com... Hi, A friend of mine has a sony car amp that is acting strange. The right channel will only work when the volume is turned up nearly all the way. Does anyone know what could be causing this? I switched the left and right inputs around to make sure it wasn't the head unit or cable, and it didn't seem to make a difference. Thanks Terry Its hard to tell for sure , but I would suspect a leaky capacitor in the bad channel . Also , check the power resistors in the emitter leggs of the output transistors or IC . I had a burnout that I had forgotten to hook up one legg of the emitter resistor , and the amp did the same thing as what you describe . |
#3
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Sony Amplifier Problem
If the sound cuts back on like this as volume is turned up, I would suspect
a bad solder connection, or other connection. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Tim Kettring" wrote in message ... "TerryG" wrote in message . com... Hi, A friend of mine has a sony car amp that is acting strange. The right channel will only work when the volume is turned up nearly all the way. Does anyone know what could be causing this? I switched the left and right inputs around to make sure it wasn't the head unit or cable, and it didn't seem to make a difference. Thanks Terry Its hard to tell for sure , but I would suspect a leaky capacitor in the bad channel . Also , check the power resistors in the emitter leggs of the output transistors or IC . I had a burnout that I had forgotten to hook up one legg of the emitter resistor , and the amp did the same thing as what you describe . |
#4
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Sony Amplifier Problem
I have a 2 channel mixer and one of the channels is a bit like that,the
volume on it is really low and i only get sound from the left speaker,ive figured out that its not the wiring or the connectors so im stuck now. anyone any ideas? --- Techno "Mark D. Zacharias" wrote in message ... If the sound cuts back on like this as volume is turned up, I would suspect a bad solder connection, or other connection. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Tim Kettring" wrote in message ... "TerryG" wrote in message . com... Hi, A friend of mine has a sony car amp that is acting strange. The right channel will only work when the volume is turned up nearly all the way. Does anyone know what could be causing this? I switched the left and right inputs around to make sure it wasn't the head unit or cable, and it didn't seem to make a difference. Thanks Terry Its hard to tell for sure , but I would suspect a leaky capacitor in the bad channel . Also , check the power resistors in the emitter leggs of the output transistors or IC . I had a burnout that I had forgotten to hook up one legg of the emitter resistor , and the amp did the same thing as what you describe . |
#5
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Sony Amplifier Problem
Resolder any bad connections on the circuit board , after unpluging it of
course . Other than that , I dont know . Have never worked on a mixer . "techno" wrote in message ... I have a 2 channel mixer and one of the channels is a bit like that,the volume on it is really low and i only get sound from the left speaker,ive figured out that its not the wiring or the connectors so im stuck now. anyone any ideas? --- Techno "Mark D. Zacharias" wrote in message ... If the sound cuts back on like this as volume is turned up, I would suspect a bad solder connection, or other connection. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Tim Kettring" wrote in message ... "TerryG" wrote in message . com... Hi, A friend of mine has a sony car amp that is acting strange. The right channel will only work when the volume is turned up nearly all the way. Does anyone know what could be causing this? I switched the left and right inputs around to make sure it wasn't the head unit or cable, and it didn't seem to make a difference. Thanks Terry Its hard to tell for sure , but I would suspect a leaky capacitor in the bad channel . Also , check the power resistors in the emitter leggs of the output transistors or IC . I had a burnout that I had forgotten to hook up one legg of the emitter resistor , and the amp did the same thing as what you describe . |
#6
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Sony Amplifier Problem
There are no bad connections at all, i heard something about caps drying up
or something,would that have anything to do with the fact that thers only sound coming from the left speaker on channel 1 and also on channel 2 im getting a constant noise from channel 2, sounds like if you were to rub your finger across the needle of a turntable. "Tim Kettring" wrote in message ... Resolder any bad connections on the circuit board , after unpluging it of course . Other than that , I dont know . Have never worked on a mixer . "techno" wrote in message ... I have a 2 channel mixer and one of the channels is a bit like that,the volume on it is really low and i only get sound from the left speaker,ive figured out that its not the wiring or the connectors so im stuck now. anyone any ideas? --- Techno "Mark D. Zacharias" wrote in message ... If the sound cuts back on like this as volume is turned up, I would suspect a bad solder connection, or other connection. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Tim Kettring" wrote in message ... "TerryG" wrote in message . com... Hi, A friend of mine has a sony car amp that is acting strange. The right channel will only work when the volume is turned up nearly all the way. Does anyone know what could be causing this? I switched the left and right inputs around to make sure it wasn't the head unit or cable, and it didn't seem to make a difference. Thanks Terry Its hard to tell for sure , but I would suspect a leaky capacitor in the bad channel . Also , check the power resistors in the emitter leggs of the output transistors or IC . I had a burnout that I had forgotten to hook up one legg of the emitter resistor , and the amp did the same thing as what you describe . |
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