Advertisement
W
BEFORE TAKING YOUR PREAMPLIFIER IN FOR SERVICING....
First check to ensure that all other components are properly connected to this unit and are operating normally. Then check the following items.
SYMPTOM
Power does not come on when the POWER | oPower cord not completely plugged in.
switch is turned on.
CAUSE
© No sound
ac PROGRAM
SELECTOR,SPEAKERS switches are in the
wrong position.
© Nominal speaker impedance. is less than 4 ohms and
protection circuit on the power amplifier is operating.
© Speaker leads or plug not completely plugged in.
© Speaker (+) and (—) leads are touching.
;
© Noise
© Howling
© Poor sound quality
© No stereo effect and poor bass
© No sound for 3 — 5 seconds after powe
switched on.
records.
ar is
© Volume level difference between tuner and
REMEDY
© Plug in completely.
© Place switches in the proper position.
© Use speakers with nominal impedance of 4 ohms
or above.
;
© Plug in completely.
| Separate the leads.
© Turntable ground wire.not attached.
© Turntable output cord too close to power cord.
© Plugs not completely plugged in.
vibrations are being transmitted to the turntable.
© Plugs (+) and (—) connections are reversed.
© Connect ground wire to the GND terminal.
© Separate the cords.
© Plug in completely.
_ . | oCaused by feedback. This occurs because speaker
© Place the speakers and the turntable as far apart :
as possible. It is also helpful to put an insulator
under the turntable.
;
:
© Too much power applied to speakers.
© Adjust the ATTENUATOR
control.
:
© Correct the plugs connections.
© Muting circuit is operating to eliminate the popping
noise when power is turned on.
an
© This is not a malfunction.
,
© Receiver signal strength and record level are different.
© It is not always possible to remedy this complete-
ly. Adjust the tuner output level so that it is the
same as the phono volume.
Advertisement
