Cambridge Audio Azur 640A v2 problem

kynsi · 04:28 PM

Hi,
I am servicing a Azur 640A v2 amplifier and two resistors keep burning up. I don't have the schematic but on the pcb they are R98 and R99, possibly used for some powersupply filtering or dropping of voltage in conjunction with some small caps (100nF) for the tc9163af-chip.

Does anyone have the schematic/service manual and/or suggestions what could be wrong?

cheers,
ks

kynsi · 14th February 2010, 06:56 PM

ok.. solved the problem. it was a burned tc9163 chip. replaced it and now it's working again, except for the cd and aux inputs.. phew....

Boydwill · 21st September 2011, 03:57 PM

Hello kynsi, I have the same problem with R98, R99 burned out, and also a NE5532P input op amp. Do you know the resistor value of R98, 99 - mine are badly burned. I am guessing 10 ohms.

Thanks.

cyteen · 9th October 2011, 10:15 PM

For reference R98 is a 1% metal film 150R and R99 is 100R.

18th January 2010, 04:24 PM	#1
kynsi diyAudio Member Join Date: May 2005 Location: cookietown	Cambridge Audio Azur 640A v2 problem Hi, I am servicing a Azur 640A v2 amplifier and two resistors keep burning up. I don't have the schematic but on the pcb they are R98 and R99, possibly used for some powersupply filtering or dropping of voltage in conjunction with some small caps (100nF) for the tc9163af-chip. Does anyone have the schematic/service manual and/or suggestions what could be wrong? cheers, ks Last edited by kynsi; 18th January 2010 at 04:28 PM.

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14th February 2010, 06:56 PM	#2
kynsi diyAudio Member Join Date: May 2005 Location: cookietown	ok.. solved the problem. it was a burned tc9163 chip. replaced it and now it's working again, except for the cd and aux inputs.. phew....

21st September 2011, 03:57 PM	#3
Boydwill diyAudio Member Join Date: Sep 2011	Hello kynsi, I have the same problem with R98, R99 burned out, and also a NE5532P input op amp. Do you know the resistor value of R98, 99 - mine are badly burned. I am guessing 10 ohms. Thanks.

9th October 2011, 10:15 PM	#4
cyteen diyAudio Member Join Date: Mar 2004 Location: S.E	For reference R98 is a 1% metal film 150R and R99 is 100R.