T+A Elektroakustik PT 820 M, PA 820 M user manual Trouble-shooting, Problem Table

This system protects the loudspeakers very effectiv

ely

against serious damage caused by clipping or other

signaldistortingerrors.

Thesystemalsoincludesprotectivecircuitswhich

guard

against shortcircuit and overheating. If a problem

occurs, the output signal is switched off and the l

oud

Iftheamplifierdoesnotcomeonagainafterthis

period,

theremaybeashortcircuitintheloudspeakercab

les,or

the amplifier may have become too hot; in this case

it

should be left switched off for a longer period to

cool

down.

Problem:

Machine does not switch on (green LED

stays dark).

Cause:

Mainsleadnotconnectedcorrectly.

Remedy:

Checkconnection,pushinfirmly.

Problem:

Machine does not respond to controls.

Cause:

M LINKcablenotconnectedcorrectly.

Remedy:

Checkconnection,pushinfirmly.

Problem:

System responds correctly to the front

panel buttons, but does not react to

remote control commands.

Cause 1:

Batteries in remote control handset ex

hausted,orfittedincorrectly.

Remedy:

Fit new batteries, or refit batteries with

correctpolarity.

Cause 2:

No visual contact between system and

remotecontroltransmitter(handset).

Remedy:

Ensure direct visual contact between

remotecontrolhandsetandreceiver(glass

doors may prevent contact). Maximum

range between transmitter and system

approx.6metres.

Position the system so that the sensor in

theintegralscreenisnotsubjecttodirect

sunlightorexcessivelybrightlighting.

Fluorescent lamps and

energysaving

bulbsarepowerfulsourcesofinterference.

Cause 3:

M LINK leadnotconnectedcorrectly.

Remedy:

Checkconnection,pushinfirmly.

Cause 4:

The RC address of the remote control

handset or the Msystem is not set

correctly.

Remedy:

Settheremotecontrolhandsetandthe

M

system to the same RC address (see

section 'F6 remote control handset -

switching the remote control address').

Note:

The

F6 remote control

handset must

alwaysbesettothesameRCaddressas

the Msystem.

Problem:

Other items of equipment (Hi-Fi, TV,

VCR etc.) respond to the RC commands

from the F6 remote control handset;

alternatively the M-system responds to

the RC signals intended for other equip-

ment.

Cause:

Overlapwithremotecontrolcodesusedby

othermanufacturers.

Remedy:

The

F6 RC handset and the

Msystem

mustbeswitchedtoadifferentremotecon

trol address (see section

'F6 - switching

the remote control address').