Question about Cambridge Audio Azur 640A Amplifier
I replaced Ics no. 5316 & 5222 on my cambridge 540A audio amp.O powering it , the volume knob automatically turned itself down frying up Ic no.NE5532p on the volume control circuit.What could be the problem?
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Posted on Jan 02, 2017
Check operations manual for indications as you described. Amps MUST have adequate ventilation. Make sure unit is not in small, semi- closed space or on top of other warm equipment. Check for speaker impedences match that of amp
Posted on May 30, 2008
looks like the input switching ic, has given up. it is advisable to change the input impedance resistors to 1k, there are about 14 of them, the original value was 100 ohm.
Posted on Oct 26, 2008
SOURCE: can't connect amp to speakers
Hi look at the end of speaker terminals, you will find tiny plastic caps , get a small screwdriver toease them out, you can plug banana clips straight in as I have done.Hope this helps
Posted on May 15, 2009
I've never repaired one of these but I have an amp at home that makes a intermittent static "popping" noise that i'm going to put down to a dirty volume pot (control) that needs cleaning. I will also have to change some of the electro capacitors that have dried up inside which cause "shot noise". With the right lubricant (electrical contact cleaner, nothing else) you could take to lid off and spray a small 1 second blast into the hole of the pot and any other balance or tone control yourself but I would take it to the electronics repairer to get the capacitors checked over.
My theory only
Posted on Jan 17, 2010
Of course, just run an audio RCA pair out from the Pre Out to your next amp and any input. All control for volume, tone, etc will remain with the 640A.
Posted on Jan 26, 2011
Testimonial: "Thank you. How will I connect my sub woofer though?"
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