656740
11
Zoom out
Zoom in
Previous page
1/14
Next page
851Wazur
ENGLISH
11
Cambridge Audio has developed a proprietary protection system to
ensure reliability and long life of its amplifiers. This protection system
comprises five main protection methods:
The 851W is able to sent fault condition states to the 851E when
connected via the Control Bus. The particular fault is then displayed
briey on the 851E display.
1. DC detection
Indicator Unit has switched off during operation, protection LED
constantly flashes in single bursts.
Description CAP5 offers loudspeaker protection if the output of the
amplifier goes to a high constant voltage (DC). This is a rare fault, although
detecting it could just save those expensive loudspeakers.
Remedy – Due to the necessary sensitivity of the DC protection circuit,
hard clipping of the amplifier may cause DC protection to be triggered.
If this fault occurs please switch the unit off, power up again and check
operation with a reduced volume level. If the DC fault occurs again
please contact your dealer for service.
2. Over temperature detection
Indicator Unit has switched off during operation, protection LED
constantly flashes in bursts of two.
Description CAP5 includes temperature detection which constantly
monitors the heat generated by the output transistors. If the monitored
temperature reaches a high level (suitably within the limits of the output
devices) the amplifier will automatically switch into a fault mode. If the
loudspeaker impedance is low, the temperature of the amplifier may rise
faster as the amplifier is working harder. If the amplifier is mounted in
a cabinet or the ventilation slots are obstructed, the over-temperature
detection may activate/reactivate after a short listening time.
Remedy The unit is not damaged, although it should be left for 15
minutes to cool down before being switched out of Standby.
3. Over-voltage/over-current detection
Indicator Unit has switched off during operation, protection LED
constantly flashes in bursts of three.
Description CAP5 offers V/I protection by constantly monitoring the
output transistors to keep them working inside their Safe Operating
Area (SOA). The SOA is a set of limits given by the output transistor
manufacturer to ensure reliability. V/I also protects the amplifier against
short-circuits on the speaker terminals during use.
Remedy The amplifier is being used outside its performance envelope.
Reduce the volume. Also check to see if there is a short- or partial short-
circuit between the loudspeaker terminals.
Note: If the indication remains the same and multiple loudspeakers are
being used on each loudspeaker output, then please remove a pair and
retry. If too many loudspeakers are connected to any amplifier, causing
the load resistance to drop too low, the amplifier will be overdriven. CAP5
will detect this situation. If the indication remains the same with only one
set of loudspeakers connected, there may be a fault with one or both of
the loudspeakers.
4. Short-circuit detection
Indicator As the unit attempts to come out of Standby mode, the
protection LED flashes in bursts of four.
Description During power up from Standby, CAP5 performs a check
on the loudspeaker terminals to see if a short across the terminals has
been accidentally introduced. If the resistance measured across the
loudspeaker terminals is too low, the unit will remain in Standby mode
until the fault has been removed and power up is re-attempted.
Remedy User-related fault. There may be a short-circuit between
the loudspeaker terminals. Check all loudspeaker connections before
attempting to switch the unit out of Standby.
5. Intelligent clipping detection
Indicator Clipping LED will flash if the audio output is at/above the
clipping level.
Description CAP5 has the ability to detect when the amplifier starts
to clip or overdrive at its output, which can damage loudspeakers and
degrade the sound. Clipping distortion is caused at high volume levels
when the output signal briefly goes outside the maximum voltage that
the amplifier can provide, causing the tops of the signal to flatten off.
Clipping
CAP5: Five-way protection system
11


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Cambridge Audio AZUR 851W at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Cambridge Audio AZUR 851W in the language / languages: English as an attachment in your email.

The manual is 10,99 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

Others manual(s) of Cambridge Audio AZUR 851W

Cambridge Audio AZUR 851W User Manual - German - 13 pages

Cambridge Audio AZUR 851W User Manual - Dutch - 13 pages

Cambridge Audio AZUR 851W User Manual - French - 13 pages


The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info