Sony CMT-DH50R Operating Instructions Manual page 112

Tuner
There is severe hum or noise.
("TUNED" or "STEREO" flashes in the
display.)
 Set the proper band and frequency
(page 67).
 Connect the antenna properly
(page 22).
 Find a place and an orientation that
provide good reception, then set up
the antenna again. If you cannot obtain
good reception, we recommend that
you connect a commercially available
external antenna.
 The supplied FM lead antenna receives
signals along its entire length, so make
sure you extend it fully.
 Locate the antennas as far away from
the speaker cords and the power cord
as possible, to avoid picking up noise.
 Try turning off the surrounding
electrical equipment.
11
GB
A stereo FM program cannot be
received in stereo.
 Press FM MODE (European models
only) or REPEAT/FM MODE (except
for European models) repeatedly until
"MONO" disappears from the display.
Optional components
There is no sound.
 Refer to General item "There is no
sound. " (page 100) and check the
condition of the system.
 Connect the component properly (page
22, 26, 97) while checking:
if the cords are connected properly.

if the cord plugs are firmly inserted

all the way.
 Turn on the connected component.
 Refer to the operating instructions
supplied with the connected
component and start playing.