Arcam delta 90.2 - Problems

wytco0 · 21st November 2004, 10:00 AM

A friend has a Arcam delta 90.2 which is about 15 years old (he thinks) It has recently developed a problem which he explains as follows :-

"Symptom is that it sounds like the base is blown, it starts crackling at any more than background volume"

The problem is only the right channel.

Does anyone hav any info on this amp or any idea what the problem might be and if its fixable?

Thanks.

wytco0 · 22nd November 2004, 04:38 PM

A bit more info about this amp, the amp is producing sound from both channels, however the right channel is very crackly with very distorted bass.

I got him to take the cover off and he could not see anything obvious, no scorching, no bulging caps no smell of burning....

Any ideas of how to work outs what's wrong?

wytco0 · 25th November 2004, 07:54 PM

Last try, anyone know about this amp?

Any ideas where I can get schematic?

Thanks.

anatech · 25th November 2004, 10:59 PM

Hi wytco0,
I don't know this amp specifically, but general troubleshooting may help here. Run an oscillator into the input and watch the level on the output. There may be a capacitor opening up that is causing the distortion at low frequencies. 6 and 10V electrolytics are a good place to look for this.
Another place to look is the solder joints on the heavier components on the PCB. Just resolder them as cracks can be almost invisable.
-Chris

jaycee · 26th November 2004, 01:43 PM

Ask Arcam directly for the schematic. In most cases they will oblige - they have excellent support and aftercare

wytco0 · 26th November 2004, 03:45 PM

Anatech, Thanks

jaycee, Thanks also, I see your from Norwich, I am from Costessey although I doint live there most of the time.

jaycee · 26th November 2004, 04:34 PM

Actually I am from Liverpool but recently moved to Norwich with my girlfriend

anatech · 26th November 2004, 04:44 PM

Hi wytco0,
Do you have any way of testing the unit? Oscillator (or CD with tones) 'scope or decent meter? Many units are repaired without any documents.
-Chris

wytco0 · 26th November 2004, 04:59 PM

jaycee, well you have chosen ' A fine city' hope your enjoying it there, I think its a great place.

anatech, not yet but I am slowly getting hold of bits of test equipment, I should be able to borrow something soon.

21st November 2004, 10:00 AM	#1
wytco0 diyAudio Member Join Date: Apr 2004 Location: Hastings	Arcam delta 90.2 - Problems A friend has a Arcam delta 90.2 which is about 15 years old (he thinks) It has recently developed a problem which he explains as follows :- "Symptom is that it sounds like the base is blown, it starts crackling at any more than background volume" The problem is only the right channel. Does anyone hav any info on this amp or any idea what the problem might be and if its fixable? Thanks.

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22nd November 2004, 04:38 PM	#2
wytco0 diyAudio Member Join Date: Apr 2004 Location: Hastings	A bit more info about this amp, the amp is producing sound from both channels, however the right channel is very crackly with very distorted bass. I got him to take the cover off and he could not see anything obvious, no scorching, no bulging caps no smell of burning.... Any ideas of how to work outs what's wrong?

25th November 2004, 07:54 PM	#3
wytco0 diyAudio Member Join Date: Apr 2004 Location: Hastings	Last try, anyone know about this amp? Any ideas where I can get schematic? Thanks.

25th November 2004, 10:59 PM	#4
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi wytco0, I don't know this amp specifically, but general troubleshooting may help here. Run an oscillator into the input and watch the level on the output. There may be a capacitor opening up that is causing the distortion at low frequencies. 6 and 10V electrolytics are a good place to look for this. Another place to look is the solder joints on the heavier components on the PCB. Just resolder them as cracks can be almost invisable. -Chris

26th November 2004, 01:43 PM	#5
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	Ask Arcam directly for the schematic. In most cases they will oblige - they have excellent support and aftercare

26th November 2004, 03:45 PM	#6
wytco0 diyAudio Member Join Date: Apr 2004 Location: Hastings	Anatech, Thanks jaycee, Thanks also, I see your from Norwich, I am from Costessey although I doint live there most of the time.

26th November 2004, 04:34 PM	#7
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	Actually I am from Liverpool but recently moved to Norwich with my girlfriend

26th November 2004, 04:44 PM	#8
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi wytco0, Do you have any way of testing the unit? Oscillator (or CD with tones) 'scope or decent meter? Many units are repaired without any documents. -Chris

26th November 2004, 04:59 PM	#9
wytco0 diyAudio Member Join Date: Apr 2004 Location: Hastings	jaycee, well you have chosen ' A fine city' hope your enjoying it there, I think its a great place. anatech, not yet but I am slowly getting hold of bits of test equipment, I should be able to borrow something soon.

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