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Old 11th February 2014, 04:19 PM   #1
diyAudio Member
Join Date: Feb 2014
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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Join Date: Jan 2009
Location: Austria
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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Location: Austria
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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Location: Near Vancouver
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.
planet10 needs your help:
Let's help Ruth and Dave
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