LENCO R25 - Page 4

Note: FM reception is affected considerably by transmission condition
Probable cause
1. Poor noise limiting effect or too
low S/N ratio due to insufficient
antenna input
of station power and antenna efficiency. As a result, you may
receive one station quite well while receiving another station poorly
1. Ignition noise caused by an
automobile engine
1. This results from the nature of the
FM reception. As the station signal
becomes weak, the noise limiter
effect is decreased and the
amplification of the limiter, in turn,
is enlarged generating noise
Program Sympton
FM 1. Noisy
reception
2. Noise heard like
scratching
3. Tuning noise between
Stations
FM/MPX 1. Noise heard during
reception FM/MPX reception while
not heard during FM
mono reception
2, Clearness of channel
separation decreases
during reception
- 3. The stereo indicator
blinks on and off
Record 1. Hum or howling
playing or
tape
playback
2. Surface noise
All stereo BALANCE control is not at
programs midpoint when equal sound
comes from left and right
channels
—
. Weaker signal because the service
area of the FM/MPX broadcast is
only half that of the FM mono
broadcast
—
. Excess heat in IC
—
. Interference
Too weak RF signal
. Record player placed too close
to speaker
. Wire other than shielded wire used
Loose terminal contact
. Shielded wire too close to line
cord, fluorescent lamp or other
electrical appliances
5. Nearby amateur radio station
or TV transmission antenna
1. Worn or old record
2. Worn stylus
3. Stylus dusty
4. Improper needle pressure
—] NM
oD
It is important to adjust for equal
sound comes from both channels.
It should not always be set to the
midpoint
What to do
1. Install the antenna for maximum signal
strength
2. lf this does not prove effective, use an
outdoor antenna designed exclusively for
FM. When you use a TV antenna for both
TV and FM with a divider make sure
TV reception is not affected
3. An exclusively long antenna may cause
noise
. Install the antenna and its lead-in wire
in proper distance from the road or raise
the antenna input as described above
. Turn the MUTING switch on. It reduces
the sensitivity, and therefore it should be
used sparingly
—t
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—s
. install the antenna for maximum antenna
Input
2. Switch on the high filter and/or turn the
TREBLE control from midpoint to left
3. Switch to mono
. Circulation of air is important to the set.
Be sure that air is flowing under the set
. Switch of for a time
. The indicator is not at fault, adjust VR 101
. Switch to mono
. Place a cushion between the player and
the speaker or place them further away
from each other
2. The connecting shielded wire should be
as short as possible
3. Switch on the LOW FILTER and adjust
the BASS control from midpoint to left
4. Consult the nearest Radio Regulatory
Bureau
. Recondition the playback head of the
tape recorder or the stylus of the record
player
2. Adjust the TREBLE control
3. HIGH FILTER on
set the MODE switch to mono and then set
the BALANCE control to a position where
equal sound comes from both channels
—s
—/ ND —/ AO
—
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