Cyrus state they don't want the "user " repairing the internal power supply , you could borrow a PSX-R to see if its the more sensitive parts of the power supply that are faulty but the internal power supply is logic controlled and although I have Cyrus equipment plus PSX-R power supplies I do not have a schematic either.
On checking yes its microprocessor controlled with protection.
IC402 is the power supply fault detector you must have a voltage failure check for 37V DC +/- and 34V DC +/- .
In addition check for 15 V DC +/- as well as a 6V DC +/- derived from the 15 Volt supply .
Manualslib has a parts list but from memory when I asked for a schematic from Cyrus they said even their agents send the faulty items back to headquarters .
On checking yes its microprocessor controlled with protection.
IC402 is the power supply fault detector you must have a voltage failure check for 37V DC +/- and 34V DC +/- .
In addition check for 15 V DC +/- as well as a 6V DC +/- derived from the 15 Volt supply .
Manualslib has a parts list but from memory when I asked for a schematic from Cyrus they said even their agents send the faulty items back to headquarters .
Sorry I should have posted a link ---now I will have to remember where I got the info.
Got it is manualslib.com --watch out one webpage just gives access to the instruction manual its the service manual webpage link you want.
CYRUS 6 SERVICE MANUAL Pdf Download | ManualsLib
Got it is manualslib.com --watch out one webpage just gives access to the instruction manual its the service manual webpage link you want.
CYRUS 6 SERVICE MANUAL Pdf Download | ManualsLib
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Cyrus factory repair service is akin to the factory service of a few other UK manufacturers now, like ARCAM for example. There is no actual repair - the board is removed and a complete, tested working, stock replacement board assembly (often with later model upgrades to the design and firmware. Then it gets a full chassis repaint and detailing job + mods to bring it all up to later model specification. There's no alternative to this type of replacement servicing, so you wind up receiving and paying for a virtually new amplifier and remote controller by the time you covered freight costs and insurance.
Get a quote before sending Cyrus anything directly. That kind of service is very expensive and in my situation, where I had bought a used CYRUS 5 on the other side of the world, it wasn't long before the power supply start-up failures recurred. It was now effectively a CYRUS 6 and the whole business became a nightmare that just became more expensive at every turn.
Get a quote before sending Cyrus anything directly. That kind of service is very expensive and in my situation, where I had bought a used CYRUS 5 on the other side of the world, it wasn't long before the power supply start-up failures recurred. It was now effectively a CYRUS 6 and the whole business became a nightmare that just became more expensive at every turn.
The reason therefore is probably, that a wide range of the part are in SMD - cheap manufacturing and very expensive in cases, if realized an actually troubleshooting and repair service - so I guess,
Thus the whole main PCB is treated as if it were one component resp. one part.
A actually repair include creating schematic with help of the genuine PCB parts and some (probably necessary modifications (to remove several design deficiencies) are only then is not a waste of time, as long a certainly amount of devices from the same model is present for service.
At one of the predecessor model the IIIi (3i) this was done several time ago - go to
https://www.diyaudio.com/community/threads/cyrus-iii-restoration-project.306782/
post #3 under
https://www.diyaudio.com/community/threads/rebuilding-cyrus-power.332113/
and post #20 under
https://www.diyaudio.com/community/...schematics-of-the-later-models-wanted.155987/
show various schematics - maybe very similar to those of the cyrus 6 + 8 models.
My conclusion is: do not buy this kind of device whose manufacturer does not provide information or whose circuits are not repairable.
Tired of these business practices.
Today it has become a common practice to make the customer dependent, not to say a prisoner of the after-sales service of the brand, even farmers have the problem now, they buy equipment at 1/2 million and cannot even change a bulb without calling a technician from the brand.
We are in 2023, resources are limited, it is time to wake up.
Tired of these business practices.
Today it has become a common practice to make the customer dependent, not to say a prisoner of the after-sales service of the brand, even farmers have the problem now, they buy equipment at 1/2 million and cannot even change a bulb without calling a technician from the brand.
We are in 2023, resources are limited, it is time to wake up.
