Radio Shack PT-990A - Manual (Page 17)

15
TROUBLESHOOTING
To determine any problem with your receiver, always check the most obvious possible causes first. If any problem still remains
after your having checked the items below, consult your nearest dealer.
Problem Probable Cause Suggestion
Amplifier
When listening to the music in stereo.
Left/right speakers reversed.
Speakers are connected wrong. After checking, if needed, reconnect.
Low hum or buzz sound Power cords or lighting placed near this
product. Place this product as far as possible
from lighting or power leads
Sound is only heard from one channel One of the input cords is disconnected.
The BALANCE control is set to one side. Connect the input leads and
adjust the BALANCE control.
Sound cuts off when listening to the
music or no sound even though power is
ON. Speaker impedance is less than
prescribed for this unit. After turning off the power and then
turning it on again, reduce the volume or
change to the correct 8 ohm speakers.
Low bass response. Speaker polarity (+/-) is reversed. Check all speakers for correct polarity.
Tuner
An unusual hissing noise is heard when
listening to the broadcast in stereo, but
not heard when listening monaurally.
A slight noise may be heard because the
method used for modulation of FM
stereo broadcasts in different than that
used for monaural broadcasts. Try reducing the treble sound by turning
the treble controls.
Noise is excessive in both stereo and
monaural broadcasts. Poor location and/or direction of the
antenna. Transmitted station is too far
away. Set the FM mode to monaural by
pressing the STEREO/MONO button.
(Note that the broadcast will then be
heard as monaural sound)
Sound is distorted and/or the volume
level becomes low. Broadcast signals are poor or poor
antenna placement If an indoor antenna is being used,
change to an outdoor antenna
Excessive distortion in speaker output Poor reception area Try using an antenna with more
elements.
Remote Control Unit
The batteries are exhausted. Replace with new batteries. Remote control not working
The remote control unit is too far from
the receiver or out of the effective range. Operate the Remote Control unit within
the effective range