TYPEIDENTIFICATION
©CyrusAudioLtdJun2014 4 Cyrus6DAC,Cyrus8DACservicemanualIssue1
Ratinglabel
Eachamplifiercarriesaratinglabelontherearpanelwhichincludesdetailsofthefollowing:
Modelnumber
Thefullmodelnumberoftheamplifierisshown.
Nominalpowervoltage
Thiswillbeeither 230VForuseonnominal220V‐240VACmainssupply.
115VForuseonnominal110V‐120VACmainssupply.
Powerconsumption
Themaximumpowerconsumptionfigureisindicated.
Changingthesupplyvoltagerating
It is possible to change the supply voltage rating of an amplifier between 115V and 230V
settings.ThefollowingadditionalpartswillberequiredfromtheCyruspartsdepartment–
Mainpowertransformerofthecorrectrating.
Mainsfuseofthecorrectrating.
Ratinglabelthatindicates
thenewsupplyvoltage.
Powercordwiththecorrecttermination.
Replacementspeakersockets(4mmfor115Voperation,BFAfor230Voperation).
In addition, the primary wiring links (R410, R411, R412) that set the supply voltage for the
controlsystempowertransformerwillrequirerewiring(detailsinthePCBparts
lists).
Modelnumberdisplay
Themodelnumberoftheamplifier(forexample–Cyrus8DAC)isdisplayedwhenthe
amplifierisconnectedtothemainsandalsoeachtimetheamplifierisswitchedonfrom
Standby.
Serialnumber
Eachamplifiercarriesaserialnumbercode,whichidentifiesthefollowing‐
Typeofproduct
Buildnumber
Paintfinish(colour)
The serial number is on the baseplate. It is therefore important to ensure that a baseplate
removed from a product isre‐fitted to the same product.In any communications with Cyrus
Service or Quality departments it is essential that the full serial number is quoted so that
originalspecificationpartsandserviceinformationmaybesupplied.
PCBIdentification
Each PCB is marked with a design revision number and this number should be quoted in all
correspondence to the service department when requesting technical advice or requesting
spare parts. The table belowshows atypical main PCBnumber, which canbe foundoneach
revisionofPCB.
Revisionnumber
PCBmarking
Mainboardrevision2 JG1012J2
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