Yamaha XM4080 Benutzerhandbuch - Seite 12

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Speaker Connection

1 Turn off the POWER switch.

2 Remove the cover attachment screws and remove the

protective cover from the speaker terminals.

3 Remove about 15 mm of insulation from the end of each

speaker cable.

4 When using 5-way binding posts (XM4180, XM4080)

Pass the bare wire through the holes in the appropriate

speaker terminals. Tighten the terminals to securely clamp

the wires. Refer to 9 page for speaker polarities.

Be sure that the bare wire ends do not jut out from the ter-

minals and touch the chassis.

Speaker

cable

* Actual size

Troubleshooting

The following table lists the main causes of abnormal operation and the corrective measures required as well as the protec-

tive circuit operation in each case.

Indicator

There is a short at the ampliﬁer's

speaker outputs, the speaker's

inputs, or in the wiring.

CLIP/LIMIT

indicator

lights up

The impedance of the connected

speaker is too low.

The temperature of ampliﬁer is too

high.

PROTECT/

MUTE indica-

tor lights up

A DC voltage of ±2 V or greater

was detected in the ampliﬁer's out-

put circuit.

XM4180/XM4080/XH200 Owner's Manual

Screw

Chassis

Bare wire

Possible Cause

When using barrier strip terminals (XH200)

Wrap the wire around the terminal as shown in the illustra-

tion, and tighten the screw to securely clamp the wire.

Refer to 10 page for speaker polarities.

Be sure that the bare wire ends do not jut out from the ter-

minal and touch the chassis.

Speaker cable

* Actual size

5 Reattach the protective cover over the speaker termi-

nals.

Remedy

Locate and remove the short.

Check the impedance rating of the

connected speaker and make sure

that it conforms to the impedance

indicated at the speaker terminals

on the ampliﬁer.

Let the ampliﬁer cool and check

that ventilation around the ampliﬁer

is appropriate for operation, as sug-

gested in the Precautions section.

Consult your dealer or a Yamaha

service center.

Wire

should not

touch the

chassis.

Protection Circuit

The PC limiter circuit

activates to protect the

power transistors.

The thermal protection

circuit activates to pro-

tect the power transis-

tors.

The output relay acti-

vates to protect the

speaker system.