Musical Fidelity A5 Spezifikationen PDF herunterladen (Seite 11)

A5.5 integrated

AMPLIFIER PROBLEMS?

Issue 1: 1

September 2007

Page 11 of 13

Basic problem-solving with an amplifier is similar to troubleshooting other electrical or electronic equipment. Always check the most obvious possible causes first,

such as the following examples:

Problem Probable Cause Remedy

No power when POWER button is pressed Mains power plug is not fully inserted into rear

socket

Plug in securely

No sound Mute function is still active

Wrong connections between input sources and the

unit

Speakers not connected, or incorrectly wired

Press the MUTE button on the remote control to

cancel.

Check audio input lead connections

Check speaker cables

Sound cut out Loose connection

Output overload or short circuit (Mute LED

flashing)

Check speaker and input connections

Switch unit off. Check speaker connections for

shorting strands or wires. When all has been double-

checked reduce volume and switch unit back on.

N.B. Take great care when bi-wiring or bi-amping

that speaker bass and treble linking straps are

removed; see speaker manual for more information

Sound is not precise, lacking in bass and stereo

image

Speakers are connected out of phase, i.e.,

connections to one speaker (+ and -) are reversed

Ensure speakers are connected with same polarity at

amplifier and speaker ends.

Hum Audio connector plug not fully pushed in

Cable Fault

Unsuitable Cable

(e.g. cable grounds not connected)

Insert plug securely

Check cable is connected at both ends.

N.B. Some esoteric cables have internal wiring

intentionally disconnected/modified. For best results

on all inputs analogue AND digital, please use good

quality screened coax; signal and screens separately

connected at both ends.

No audio output, or too low level output Incorrect or missing connections

USB Driver not selected (PC or MAC)

Check connections and make sure they are secure.

See P.9 PC users

or MAC users section

No audio output from USB input USB Cable not connected

USB Driver not selected (PC or MAC)

Check connections and make sure they are secure.

See P.9 PC users

or Mac users section

Not detected when connected to USB

USB Cable faulty

USB not working/enabled on computer

Correct USB drivers not installed

(can happen particularly with factory- preinstalled

Windows operating systems)

Check and replace cable

Check USB port functions with another device.

Please check with the computer manufacturer.

Enquire about USB driver or update.

Dropouts in sound (USB input) Shared USB port with another device

Computer busy with another application

Computer low on resources

Avoid sharing the USB port with other devices, if

possible.

At times an application (program) may intervene,

sometimes invisibly e.g. a virus scanner. When this

happens, computer resources are temporarily used

up, and playback may falter. This is not a fault. Try

running fewer applications if possible.

Hum Audio connector plug is not fully pushed in Insert plug securely

Remote control does not work Amplifier’s POWER switch is set to off

One or more batteries fitted the wrong way round

Batteries are flat

Remote control is not pointed directly towards the

front panel of the amplifier

Set switch to on

Insert batteries correctly

Change batteries for a new set

Ensure there is no obstruction between the remote

control and amplifier front

Remote control range has greatly reduced Batteries are running out Change batteries for a new set.

Remote controller socket not working Cable unplugged

Insufficient signal

Wrong codes used

Wrong frequency

Check cable

Signal needs to be at least 3V pk-pk

check controlling equipment specification

Unit only recognises RC5 codes given on P.8

Unit accepts 38KHz inputs only

If none of these actions affect a cure, please contact the dealer, or an authorised Musical Fidelity service agent. Remember; never open the case of the A5.5, as this

will invalidate the guarantee.

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