Pioneer CT-W801R Service Manual page 43

1. Differences according to Models
2. Accepted Conditions
3. Operations
(a) Bias Setting
level.
(b) Level Setting :
(c) EQ Setting
reference. If the 3 kHz playback level is lower than the level to
be taken as the reference by more than 0.5 dB, perform
mid-range correction (raise the mid-range level), and take the
slack of the f characteristics in the vicinity of 3 kHz.
(d) Check points
Check points have been provided to prevent incorrect
adjustments during AUTO BLE operations. Errors are
determined when the various check points cannot be passed.
When errors have been determined, the mechanism is stopped,
BIAS, LEVEL and EQ are returned to their reference values, and
the ''ERR" blinking display is shown. This display continues
until the normal display is retumed by pressing a certain key.
e STOP check
Error is determined when the mechanism stops due to tape end.
(When BLE is set, forcible STOP is set with tape end.)
e Blank check
Perform the 500 msec blank recording immediately before
recording the test signal. Return to the center of this
blank when rewinding. If it is blank at the start of playback, the
tape is determined as being at its correct position. ''Error" is
determined if it is not blank.
e Recording signal rising check
The rising of the playback signal is most important for BLE. The
signal is determined according to the time from this rising. The
signal must rise within 500 msec from blank check at the latest.
If this cannot be confirmed within this period, it is determined as
error".
e Leader tape check
Check if the tape is in the leader tape section by checking if the
playback signal is present or absent immediately aftr EQ setting.
Error is determined if there is no signal in the leadertape.
(e) Mask PLAY and Blank REC
In the mechanism, as the tape running also doe; mot become
stable immediately after PLAY mode assist has bein completed,
some time will be required for running stabilization "This time is
1.5 seconds. At the start of BIAS recording, at kast 0.5 to 2
seconds are required for blank REC. The 1.5 seconds mask play
is also performed before starting each check PLAY.
(f) Rewinding
For the BLE of conventional mechanisms, revinding was
performed by REW (FF) because the tape positom could be
determined with the tape counter. However, for th: ELE of this
unit, this method cannot be used as the tape couiter lags very
easily. The tape is therefore rewound using PLAY which has
very little lagging. The rewinding amount is controlecd by time.
However, the tape may advance more than requre:d in some
cases when the assist for this side cannot be performdl because of
the assists of other mechanisms due to stagger preesssing. This
time during which the tape was advanced is meayred, and the
tape is advanced in the reverse direction for this tine during the
next PLAY operation. This enables an almost pwrecise start
position searching to be performed.
49
&
i