Yamaha RX-777 Owner's Manual download pdf (Page 20)

E-16

TROUBLESHOOTING

If the unit fails to operate normally, check the following points to determine whether the fault can be corrected by the simple

measures suggested. If it cannot be corrected, or if the fault is not listed in the PROBLEM column, disconnect the power cord

and contact your authorized YAMAHA dealer or service center for help.

PROBLEM

Amplifier

The unit fails to turn on when the STANDBY/

ON switch is pressed.

It happens that this unit does not work

normally.

No sound or no picture.

The sound suddenly goes off.

Only one side speaker outputs the sound.

Sound “hums”.

The volume level is low while playing a record.

The volume level cannot be increased, or sound

is distorted.

Sound level is low.

The INPUT selector will not function though it

is turned.

Using the BASS, TREBLE, BALANCE and

LOUDNESS controls does not affect the tone.

FM stereo reception is noisy.

There is distortion and clear reception cannot be

obtained even with a good FM antenna.

A desired station cannot be tuned in with the

automatic tuning method.

Previously preset stations can no longer be

tuned in.

A desired station cannot be tuned in with the

automatic tuning method.

There are continuous crackling and hissing

noises.

There are buzzing and whining noises (especially

in the evening).

CAUSE

Power cord is not plugged in or is not completely

inserted.

There is an influence of strong external noise

(lightning, excessive static electricity, etc.) or a

misoperation on this unit while using this unit.

Incorrect output cord connections.

Appropriate input source is not selected.

The SPEAKERS switches are not set properly.

Speaker connections are not secure.

The protection circuit has been activated because of

short circuit etc.

The SLEEP timer has functioned.

Incorrect setting of the BALANCE control.

Incorrect cord connections.

No connection from the turntable to the GND

terminal.

The record is being played on a turntable with an

MC cartridge.

The component connected to the REC or ZONE 2

output terminals of this unit is turned off.

The LOUDNESS control is functioning.

The CD DIRECT AMP switch is ON.

The CD DIRECT AMP or PURE DIRECT switch

is ON.

Because of the characteristics of FM stereo

broadcasts, this is limited to cases where the

transmitter is too far away or the antenna input is

poor.

There is multipath interference.

The station is too weak.

This unit has been unplugged for a long period.

Weak signal or loose antenna connections.

Noises result from ligtning, fluorescent lamps,

motors, thermostats and other electrical equipment.

A television set is being used nearby.

REMEDY

Firmly plug in the power cord.

Turn this unit into the standby mode and disconnect

the AC power cord from the AC outlet. After about

30 seconds pass, connect the power and operate this

unit again.

Connect the cords properly. If the problem persists,

the cords may be defective.

Select an appropriate input source with the INPUT

selector.

Set the SPEAKERS switch which corresponds to

the speakers to be used to the ON position.

Secure the connections.

Check the IMPEDANCE SELECTOR switch is set

to the appropriate position and then turn the unit

back on.

Check the speaker wires are not touching each

other and then turn the unit back on.

Turn on the power, and play the source again.

Adjust it to the appropriate position.

Connect the cords properly. If the problem persists,

the cords may be defective.

Firmly connect the audio plugs. If the problem

persists, the cords may be defective.

Make the GND connection between the turntable

and this unit.

The player should be connected to the unit through

the MC head amplifier.

Turn the power to the component on.

Set the LOUDNESS control to the 0 position.

Switch off the CD DIRECT AMP switch.

The CD DIRECT AMP and PURE DIRECT

switches must be switched OFF to use those

controls.

Check the antenna connections.

Try using a high quality directional FM antenna.

Set the TUNING MODE button to the manual

tuning mode.

Adjust antenna placement to eliminate multipath

interference.

Use the manual tuning method.

Use a high quality directional FM antenna.

Repeat the presetting procedure.

Tighten the AM loop antenna connections and

rotate it for best reception.

Use the manual tuning method.

Use an outdoor antenna and a ground wire. This

will help somewhat but it is difficult to eliminate all

the noises.

Relocate this unit away from the TV.

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 39 40

Comments to this Manuals

No comments

Yamaha RX-777 Owner's Manual Page 20

Comments to this Manuals

Related products and manuals for Audio tuners Yamaha RX-777