Cambridge Audio CD3 Player

Mohan Varkey · 13th November 2001, 09:59 PM

My Cambridge Audio CD3 Player has for reasons not known, muted its analog output. Digital Out is functional.

Local Cambridge service agent, requires the service manual to correct this fault. Can anyone help?

Mohan

gene · 16th November 2001, 06:22 AM

please check the transistor which act as a mute switch at the analog outpot(parallel to signal pass), check the control signal at the base of the transistor, normally it's low when the machine play.

hifiZen · 16th November 2001, 10:00 AM

do you have a scope? if so, you can try tracing the signal path back from the output. It could be several things: output relays (if any), the mute transistor (wrong mute signal or just a shot transistor), bad solder joint or cracked PCB trace (not unknown), blown opamp .... etc. best is to get a scope and poke around.

Mohan Varkey · 16th November 2001, 01:04 PM

I am a valve man from way back and so a bit hesitant to poke around where space is at a premium, the voltages so miniscule and the components so fragile! Just a joke!

Yes I have a reasonably good lab setup that includes a 200MHz Tektronix scope. I shall follow your advice and persevere a bit more.

Thanks.
Mohan

hifiZen · 17th November 2001, 05:27 AM

heh, this might be just the excuse you need to build an external DAC!

Mohan Varkey · 20th November 2001, 09:20 PM

Thanks Gene and hifiZen for all your help and suggestions. You have given me a wakeup call. I am thinking about building a DAC. First, I shall design a tube analog output stage and then the preceding stages one after the other.

Mohan

Prometheus · 6th October 2003, 05:07 AM

My Cambridge Audio CD 3 does not respond to any commands at all and the display is not working. When the power is switched on, the motor spins a bit and the LED at the front panel lights up, indicating that there is power. It also does not respond to remote commans.

What wrong with this player? I"ve been told that the user processor/interface chip is spoilt. What's the user processor of this player? It's in the same generation as the Philips 880/Marantz CD 85 with a CDM 2 mechanism and 1541 DAC.

Would appreciate any comments/suggestions. If anyone has the service manual, I would be really grateful.

Thanks in advance for your help.

x-pro · 6th October 2003, 05:28 AM

this is a direct link to the manufacturer of Cambridge Audio:

http://www.audiopartnership.com

they may have a service information.

Cheers

x-pro

Prometheus · 7th October 2003, 02:52 AM

Quote:

Originally posted by x-pro
this is a direct link to the manufacturer of Cambridge Audio:

http://www.audiopartnership.com

they may have a service information.

Cheers

x-pro

Thanks.
They require a password to access the service manuals.

x-pro · 7th October 2003, 05:32 AM

Quote:

Originally posted by Prometheus

Thanks.
They require a password to access the service manuals.

Try to ask them by email.

x-pro

16th November 2001, 06:22 AM	#2
gene diyAudio Member Join Date: Oct 2001	a suggestion please check the transistor which act as a mute switch at the analog outpot(parallel to signal pass), check the control signal at the base of the transistor, normally it's low when the machine play.

16th November 2001, 10:00 AM	#3
hifiZen diyAudio Member Join Date: May 2001 Location: Mountain View, CA	do you have a scope? if so, you can try tracing the signal path back from the output. It could be several things: output relays (if any), the mute transistor (wrong mute signal or just a shot transistor), bad solder joint or cracked PCB trace (not unknown), blown opamp .... etc. best is to get a scope and poke around. __________________ - Chad.

17th November 2001, 05:27 AM	#5
hifiZen diyAudio Member Join Date: May 2001 Location: Mountain View, CA	heh, this might be just the excuse you need to build an external DAC! __________________ - Chad.

6th October 2003, 05:07 AM	#7
Prometheus diyAudio Member Join Date: Oct 2003 Location: Singapore	My Cambridge Audio CD 3 does not respond to any commands at all and the display is not working. When the power is switched on, the motor spins a bit and the LED at the front panel lights up, indicating that there is power. It also does not respond to remote commans. What wrong with this player? I"ve been told that the user processor/interface chip is spoilt. What's the user processor of this player? It's in the same generation as the Philips 880/Marantz CD 85 with a CDM 2 mechanism and 1541 DAC. Would appreciate any comments/suggestions. If anyone has the service manual, I would be really grateful. Thanks in advance for your help. __________________ Hifi is a journey. Be thankful for friendly fellow travellers.

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13th November 2001, 09:59 PM	#1
Mohan Varkey diyAudio Member Join Date: Oct 2001 Location: Melbourne, Australia	My Cambridge Audio CD3 Player has for reasons not known, muted its analog output. Digital Out is functional. Local Cambridge service agent, requires the service manual to correct this fault. Can anyone help? Mohan

16th November 2001, 01:04 PM	#4
Mohan Varkey diyAudio Member Join Date: Oct 2001 Location: Melbourne, Australia	I am a valve man from way back and so a bit hesitant to poke around where space is at a premium, the voltages so miniscule and the components so fragile! Just a joke! Yes I have a reasonably good lab setup that includes a 200MHz Tektronix scope. I shall follow your advice and persevere a bit more. Thanks. Mohan

20th November 2001, 09:20 PM	#6
Mohan Varkey diyAudio Member Join Date: Oct 2001 Location: Melbourne, Australia	Thanks Gene and hifiZen for all your help and suggestions. You have given me a wakeup call. I am thinking about building a DAC. First, I shall design a tube analog output stage and then the preceding stages one after the other. Mohan

6th October 2003, 05:28 AM	#8
x-pro diyAudio Member Join Date: Apr 2003 Location: London	this is a direct link to the manufacturer of Cambridge Audio: http://www.audiopartnership.com they may have a service information. Cheers x-pro

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