Maintenance; Specifications - Sony LBT-N455KRW Operating Instructions Manual

Tape Player
The tape does not record.
No tape in the cassette holder.
The safety tab has been removed
from the cassette.
The tape has reeled to the end.
The tape does not record nor play
back or there is a decrease in sound
level.
The heads are dirty. Clean them.
Magnetic deposits have built-up on
the record/playback heads.*
There is excessive wow or flutter, or
the sound drops out.
The capstans or pinch rollers are
contaminated.*
The tape does not erase completely.
Magnetic deposits have built- up on
the record/playback heads.*
Noise increases, or the high
frequencies are erased.
Magnetic deposits have built-up on
the record/playback heads.*
EN
* See "Maintenance".
28
CD Player
The CD will not play.
The CD is dirty.
The CD is inserted label side down.
Moisture condensation has built up.
Leave the system turned on for
about an hour until the moisture
evaporates.
Play does not start from the first
track.
The player is in programme or
shuffle mode. Press CONTINUE.
Microphone Mixing/
Karaoke
There is no microphone sound.
Turn VOLUME or MIC LEVEL to
adjust the microphone volume.
Make sure that the microphone is
connected to the MIC jack correctly.
You hear acoustic feedback when
using the microphone.
Turn MIC LEVEL to MIN.
Move the microphone away from
the speakers or change the direction
of the microphone.
For Your Information
General
There is no sound.
Rotate the VOLUME clockwise.
The headphones are connected.
Disconnect them.
Sound comes from one channel, or is
unbalanced between the left and
right speakers.
Check the speaker connections of
the inoperative channel.
The left and right sounds are
reversed.
Check the speaker connections and
speaker placement.
There is no bass or the location of
the musical instruments is
apparently imprecise.
Check the speaker connection for
proper phasing.
There is severe hum or noise.
The TV, VCR or speakers is too
close to the stereo system. Move the
stereo system away from the TV,
VCR or speakers.
"12:00 AM" flashes in the display.
A power interruption occurred.
Set the clock again.
The remote does not function.
The batteries have run down.
Replace both batteries.
There is an obstacle between the
remote and the system. Remove the
obstacle.

Maintenance

To clean the tape heads and tape
path
Contaminated tape heads cause poor
recording or sound dropout in playback.
We recommend cleaning after every 10
hours of operation.
Open the cassette holder and wipe the
heads, pinch rollers and capstans with a
cleaning swab slightly moistened with
cleaning fluid or alcohol. Wipe the parts
shown below:
Deck A
Cleaning swab
Capstan
Playback head
Pinch roller
Deck B
Cleaning swab
Capstan
Record/playback
head
Erase head
Pinch roller
Insert a tape after the areas cleaned are
completely dry.
To demagnetize the tape heads
After 20 to 30 hours of use, enough residual
magnetism will have built up on the heads
to begin to cause loss of high frequencies
and hiss. At this time, demagnetize the
heads and all metal parts in the tape path
with a commercially available tape head
demagnetizer. Refer to the instructions of
the demagnetizer.
To clean the cabinet
Use a soft cloth slightly moistened with a
mild detergent solution.
To clean the CD
When a CD is dirty, clean it with a cleaning
cloth. Wipe the CD from the centre out.
Notes on CDs
• Do not use solvents such as benzene,
thinner, commercially available cleaners,
or antistatic spray intended for vinyl LPs.
• If there is a scratch, dirt or fingerprints on
the CD, it may cause a tracking error.

Specifications

CD player section
System Compact disc and
digital audio system
Laser Semiconductor laser
(λ = 780 nm)
Emission duration:
continuous
Max 44.6 µW*
laser output
* This output is the value measured at a
distance of 200 mm from the objective
lens surface on the Optical Pick-up Block
with 7 mm aperture.
Wavelength 780 – 790 nm