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Old 11th February 2014, 04:19 PM   #1
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Default leak delta 70

My delta 70 was running ok then one channel suddenly became very very loud. I could only listen with the balance knob fully clockwise. I isolated the fault to one plug-in amlifier (not pre-amp) board. I have the circuit diagram, but need help to pin point the faulty component. Can anyone help please?
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Old 11th February 2014, 08:17 PM   #2
mjf is offline mjf  Austria
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you think the fault is in the power amp section....(behind the volume control)?

at first i would search for a bad soldering point or a lost cable connection.
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Old 12th February 2014, 04:29 PM   #3
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Default leak delta 70

Thank you. The fault is definitely on one plug-in board, the amplifier board not the pre-amp. I have looked on the board for bad solder joints but not found any.
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Old 12th February 2014, 05:43 PM   #4
mjf is offline mjf  Austria
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i guess........you have a multimeter..........

you can measure the voltage drops across some parts of the working channel and compare these with the bad channel. there should be a difference somewhere.
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Old 12th February 2014, 08:43 PM   #5
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Hey Tony, welcome to diyAudio. You might have better luck if you post this somewhere other than the intro area. Not everyone looks in here.
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