Custom installation C.I. use | Cambridge Audio 640Razur specification

Custom installation (C.I.) use

	Control	The 640R features Control Bus inputs and outputs that
	Bus	allow un-modulated remote control commands
		allow un-modulated remote control commands
		(positive logic, TTL level) to be received electrically by
In	In	the unit. These control commands are typically
		generated by custom installation (multi-room) systems
		or remote IR receiver systems. The Control Bus sockets
Emitter	Out	are colour-coded orange.
	Out

An IR Emitter Input is also provided that allows modulated IR remote control commands to be received electrically by the unit. Commands on

this input operate the unit only and are not looped out

RS232C

demodulated on the Control Bus Output. An RS232 port is also featured which allows the 640R to be controlled by C.I. systems.

In addition the unit features 'direct' IR/Control codes as well as toggle codes for some of their features to simplify programming custom installation systems. Special direct On/Off and Mute commands can be accessed on the supplied remote control for teaching into C.I. systems as follows:

1.Press and hold the Standby/On button on the remote control. The remote first generates it's standby (toggle) command. Keep the button held down, after 12 seconds an AV receiver “On” command will be generated. If the button is kept held down for a further 12 seconds, an AV receiver “Off” command is generated.

Repeat this procedure with the Mute, Sub On/Off, Stereo Mono and Tuner AM/FM buttons to send On/Off commands. The Tuner AM/FM button also provides unique FM and AM commands to allow switching to a specific band.

A full code table and RS232 protocol for this product is available on the Cambridge Audio website at www.cambridge-audio.com.

Reset/Back-up memory

The 640R has a function that preserves the preset memory and other settings. In the event of a power failure, or if the power cord of the unit is disconnected from the mains outlet, the back-up memory will preserve the preset memory for approximately one week. If the power supply is interrupted for 7 days or longer, the memory settings will be erased.

If it is desired to reset all settings to their factory defaults (or in the unlikely event that the unit locks up due to an electrical discharge etc), with the unit on and out of Standby mode press and hold the DVD and Analog Stereo Direct buttons on the front panel for three seconds.

Analog

Tuner FM/AM

DVD

Video 1

Video 2

Recorder 1

Aux

Recorder 2

7.1 Direct

Stereo Direct

– Tuning +

Mode/Store

Digital Processing Options

Video 3

Audio

Stereo

Pro Logic/Neo/

Dolby Digital/

Video

Input Type

Modes

DSP Surround

DTS Surround

Input Type

Modes

“RESET” will appear briefly on the front panel display before returning to Standby mode.

azur	640R
Troubleshooting
A low hum or buzz sound can be heard		ENGLISH
Power cords or lighting placed near this product.		ENGLISH
Power cords or lighting placed near this product.
Analog inputs not connected securely.
Sound is not audible from one channel
Sound is not audible from one channel
Speaker connections disconnected.
Speaker set to “None” in OSD setup menu.

Sound cuts off when listening to music or there is no sound even though power is ON

Speaker impedance is less than prescribed for the 640R.

The unit is not adequately ventilated and may be overheating.

Low bass or “phasey” response

Speaker polarity (+/-) of one or more speakers is reversed.

An unusual hissing noise is heard when listening to a radio broadcast in stereo, but not heard when listening in mono

A slight noise may be heard because the method used for modulation of FM stereo broadcasts is different than that used for mono broadcasts.

Aerial quality also effects the level of hiss heard.

Noise is excessive in both stereo and monaural radio broadcasts

Poor location and/or direction of the antenna.

Transmitting station is too far away.

No sound from the rear speakers

Source being played is not recorded in surround sound.

Speaker/s set to “None” in OSD setup menu.

A stereo mode has been selected.

No sound from the centre speaker

Centre speaker has been set to “None” in OSD setup menu.

A stereo mode has been selected.

No sound from the subwoofer

Sub has been set to ‘Off’ in the OSD setup menu or via the remote.

DTS Neo:6, DD PLII/IIx modes (which have no LFE channel) have been selected with all speakers set to “Large”.

Remote control is not working

The batteries are flat.

The remote is too far from the receiver or out of the effective range.

No sound from speakers when connected to a digital input

Audio input type is set to analogue (check display). Press the Audio Input Type button to switch to digital.

No sound from speakers when connected to an analogue input

Audio input type is set to digital. Press the Audio Input Type button to switch to analogue (check display).

Audio input type can also be set in the Input/Output Setup menu of the OSD.

640Razur specifications

The Cambridge Audio 640R is a high-fidelity AV receiver that has gained recognition for its remarkable performance and sophisticated features. Engineered to deliver a premium audio experience, this receiver excels in both music and home theater applications.

One of the standout features of the 640R is its ability to handle a wide range of audio formats. With support for advanced surround sound formats such as Dolby TrueHD and DTS-HD Master Audio, the receiver is capable of producing high-definition audio that enhances the clarity and detail of films and music. The 640R also supports standard formats like Dolby Digital and DTS, making it highly versatile.

At the heart of the 640R is Cambridge Audio's proprietary components, including high-quality capacitors and resistors, designed to minimize noise and distortion. This ensures that the audio output remains clean and transparent, providing a true representation of the source material. The receiver offers a robust power output, ensuring effortless dynamic range and delivering impactful sound, whether it's a subtle dialogue or explosive action scenes.

Another key feature of the Cambridge Audio 640R is its extensive connectivity options. It boasts multiple HDMI inputs, allowing users to connect various devices such as Blu-ray players, gaming consoles, and streaming devices. Additionally, the receiver supports HDMI video scaling, enabling the upscaling of standard definition signals to 1080p, which enhances the viewing experience on high-definition screens.

The 640R also includes multiple analog and digital inputs, ensuring compatibility with legacy devices alongside modern technology. A dedicated preamp output allows for the addition of external amplifiers, enhancing the system's scalability for audiophiles looking to create a bespoke setup.

Moreover, the Cambridge Audio 640R features an intuitive user interface and remote control, making it user-friendly even for those new to home audio systems. The on-screen display simplifies the selection of sources and adjustment of settings, while the advanced configuration options allow for precise customizations.

In summary, the Cambridge Audio 640R stands out as an exceptional AV receiver, combining audiophile-grade components with modern features. With its powerful performance, advanced surround sound capabilities, and extensive connectivity, it caters to both music lovers and home theater enthusiasts, making it a compelling choice for anyone looking to enhance their audio experience.