CAMBRIDGE AUDIO 840A MANUAL PDF

website: Please note that because of the Class XD technology the A V2 runs slightly warmer than a conventional Class B/AB. View and Download Cambridge Audio A service manual online. A Amplifier pdf manual download. Manuals and User Guides for Cambridge Audio azur A. We have 7 Cambridge Audio azur A manuals available for free PDF download: Service Manual.

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This document may not be reproduced, distributed, transmitted, displayed, published, or broadcast without the express written prior permission of Audio Partnership PLC. B 47N PE 840z The relays on the other PCBs are controlled by a set of shift registers that convert serial data from the PIC into 32 latched outputs.

CAMBRIDGE AUDIO A SERVICE MANUAL Pdf Download.

Four shift registers U3,U4,U5,U6 are connected so that the serial input enters the first register and is clocked through and out of its serial output into the serial input of the second register. The balance control operates in discrete steps selected by relays.

The XD control circuit is a differential pair of transistors with one input grounded and the other driven by the main amplifier output voltage, scaled down audko by R63, R The drive to aidio displacer is taken from collector load R58, to give the required phase inversion. R59 is present simply to equalise the dissipation in the differential pair transistors to maintain their balance.

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Cambridge Audio azur A Manuals

When it is enabled, the clip-detect system turns down the volume when excess clipping of either amplifier output occurs. Very brief episodes of clipping are ignored. The volume stays reduced and does not ramp back up in the absence of clipping. The clip detect system is based on Q23, Q24 and associated components. Control Hub input switcher from IR commands Send input select data to main PIC Control Hub input switcher to prevent thumps on A output Control A-bus status line IR commands to the A-bus keypads are sent to the hub so that the required input can be selected and external equipment controlled.

Cambridge Audio azur 840A User Manual

Press and hold the relevant input select button. Letters in the name are selected by turning the volume knob. To access the configuration menu: Press and hold the Mode button.

These are the menu options: After about 4 seconds the following should be displayed on the LCD: The following window should be displayed: Page of 63 Go.

Table of Contents Add to my manuals Add. Chapters a Service Manual Cambridge Audio azur A User Manual 26 pages. Service Manual A Issue Date: Page 53 The relays on the other PCBs are controlled by a set of shift registers that convert serial data from the PIC into 32 latched outputs.

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Page 56 The XD manjal circuit is a differential pair of transistors with one input grounded and the other driven by the main amplifier output voltage, scaled down appropriately by R63, R Page 57 Clip detection. Page 58 Control Hub input switcher from IR commands Send input select data to main PIC Control Hub input switcher to prevent thumps on A output Control A-bus status line IR commands to the A-bus keypads are sent to the hub so that the required input can be selected and external equipment controlled.

Page 60 To rename inputs: Page 62 5 Click the Load File button, the following window will be displayed: Comments to this Manuals Your Name.

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