Sony TC-K333ESA Service Manual page 5

Identifying the
Parts
(Except for European model)
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CASSETTE DECK ff |
REMOTE Commander
The controls on the REMOTE commander
are identical in function and operation to
those with the same name on the main unit.
For details, refer to the page number
indicated in (parenthesis).
[1] & (open/close) button
[2] DISPLAY button
[3] Counter buttons
[4] MONITOR button
[5] Tape operation buttons
(6] CD (Compact Disc) buttons
for controlling Sony CD players
fl (pause) button
4 / PPI buttons for locating selections
sequentially
CD SYNCHRO buttons
for synchronized recording with a Sony
CD player
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There are many different types of cassettes
on the market, each with varying magnetic
properties. Although your unit is equipped
with the ATS (Automatic Tape Selection)
system which sets the appropriate
equalization characteristics and bias current
for each tape type, an additional calibration
adjustment can often produce even better
results. Use the bias current and recording
level calibration function to obtain the
optimum recording conditions for your tape.
CALIBRATION
REC LEVEL
Adjusts bias current
within + 20%
Adjusts recording level
within t3dB
Bias calibration
Choosing the optimum bias current for a
tape ensures minimum distortion and flat
frequency response. Lowering the bias
current boosts high-frequency response,
but also results in higher distortion. Raising
the bias, on the other hand, reduces
distortion, but also dampens high-frequency
response. Optimum bias is thus obtained
when the bias current and high-frequency
response are well balanced.
Bias reduced (—)
High-
frequency
response
drops
Output
(level in dB)
Bias increased (+)
Frequency in Hz
« If the bias current is higher or lower than
the optimum setting for a certain tape, the
frequency response changes as shown in
the Chart in Fig. EJ . Changing the bias
can thus be used to tailor the response to
your liking, for example by slightly
emphasizing the upper or lower end.
* The frequency response of metal tapes is
much less affected by changes in the bias
current than other tape types. With some
tapes, the adjustment range of this deck
(+20%) may therefore not be sufficient to
cover every possible requirement.
Recording level calibration
Even when the recording level is adjusted
correctly, using a tape with low sensitivity
will result in a low playback level. The REC
LEVEL calibration control allows you to
compensate for sensitivity differences
among tapes to equalize both recording and
playback levels. This is especially important
when using the Dolby NR system, since it is
most effective when recording and playback
levels are the same.