Maintenance - Pioneer CT-S99WR Operating Instructions Manual

MAINTENANCE
CLEANING THE HEAD, PINCH ROLLER AND
CAPSTAN
The heads, pinch roller and capstan are parts which are liable to get
dirty quite easily. In particular, if the heads are dirty, the high-
frequency components are not reproduced and the stereo balance is
impaired, resulting in a deterioration in the playback sound. It is
therefore recommended that the head section be cleaned regularly.
1. Depress the EJECT button and open the cassette door.
2. Dip the cleaning swab into the cleaning fluid and use it to wipe the
heads, pinch rollers, and capstans.
To clean the pinch roller while it is rotating:
Press the detector pin in the cassette door. Next, press either the for-
ward play switch ( .,. ) or the reverse play switch ( .,. ).
• If the reverse mode is selected, the pinch roller will rotate for about
four seconds only. Press the reverse play switch ( .,. ) again and
the pinch roller will rotate again.
• After cleaning the pinch roller while it is rotating, press the stop
switch . The cassette door can be closed only in the stop mode.
• The illustration shows the position of the detector pin in deck 11.
G..__o_e_M_A_G_N_E_T_1z_1_N_G_ ' T_H_E_H~E_A_D_s
_ _ _ _ _ )
After using the cassette deck over a period of time, the heads will
become magnetized . The same effect is also caused by bringing a
screwdriver, magnet or other magnetized object too near the heads.
This causes loss of high-frequency sound during recording and
playback, and is also a cause of interference noise. The heads should
be regularly demagnetized with a head demagnetizer (eraser) which
can be purchased at the dealers shops.
When demagnetizing the heads, be sure the cassette deck's POWER
switch is in the OFF position. For detailed instructions, consult the
operating manual for your head demagnetizer (eraser).
The detector pin in the door of deck I is located on the opposite pin
side (the right side of the transport mechanism).
NOTE:
Do not load a tape after cleaning the head section until the clean-
ing fluid has completely dried (this takes two or three minutes).
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LEANING THE FRONT PANEL )
S __ E_CT~IO_N~~~~~~~~~~~-
Wipe the front panel and the cassette door when dusty or greasy with
a soft cloth containing a small amount of ordinary washing-up liquid .
Then, wipe dry with a cloth . Never use volatile spirits like thinners,
benzine or alcohol because they will damage the panel's finish.
NOISE REDUCTION SYSTEMS
This deck is equipped with three noise reduction systems, the dbx,
the Dolby NR B and C types.
Dolby N R System
This system was developed in order to reduce the amount of tape hiss
noise (primarily high-frequency components) produced during record-
ing . During recording, the high-frequency pianissimo components
where noise is most easily noticed are emphasized, and during
playback, these emphasized components are attenuated to return the
sound to normal. As a result, the noise in the parts emphasized during
recording are reduced.
The Dolby NR "B" mode gives its noise-reduction effects in the high
range, thus reducing tape hiss noise and expanding the dynamic
range. Dolby NR "C" produces its noise-reduction effects from the
mid-ranges on up, thus achieving an even greater degree of noise
reduction compared to the Dolby NR "B" type .
dbx system
The dbx system is provided to expand the dynamic range by encoding
and decoding sound signals across the entire signal spectrum. During
recording, the input signal is encoded and recorded at one-half normal
level. At time of playback, the signal recorded at one-half level is
decorded at twice normal level, thus returning the signal to normal.
Since large and small signals are decoded in proportion to their size,
the dynamic range is greatly improved, and tape noise is reduced.
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