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DP-7020
40
CIRCUIT DESCRIPTION
* TBC function
The write data clock pulse (WFS) and the read data
clock pulse (RFS) are independent
in operation from
each other. Thus, the jitter margin ranges
+1
clock
pulse widths.
BCKt
20B1T
a
2.834yS
For 2MSB detection, the level (2's complement) of
the 2MLSB detection value at playback is output for
both Lch and Reh.
Figure
17 shows the I/O waveforms in use of each
digital filter.
~
LE
Samaras
|
0.708uS
L
M
2 ale|s|e)>|6 ofelulaps 14
oarere
Qa
QB
ac
16117] 18
16FS
a
ee
¢ PLL function
Since the phase comparator is of a well-known sys-
tem, its description is not made here.
For the counter setting of the divider, the type of the
input clock pulse, LPF and VCXO circuit configuration,
etc., refer to "11-3 Block diagram" and "11-2 Pin func-
tions".
Fig. 17
+ Digital filter mode setting
Only two modesare available, 16-bit and 18-bit modes.
This unit is set at the 18-bit mode.
The mode change is performed at the time of muting.
The status right before the cancel of muting is held.
DP-7020
MECHANISM OPERATION DESCRIPTION
Mechanism Operation Description
Fig. 1 shows the relationship of mechanisms in the STOP
mode. The OPEN/CLOSE
operation of the mechanism and
the
UP/DOWN
operation
of the
pickup
chassis
when
loading the disc are description below.
Note 1:
The black arrow (OPEN) and the white arrow
{CLOSE)
in the operation description have the following
meanings :
Black arrow (OPEN) : Tray opening direction
(Tray OPEN)
White arrow (CLOSE) : Tray closing direction
(Tray CLOSE)
Note 2:
Figures in the bracket
(
) in the operation
description
or accompanied
with
the part name
in the
diagram show the reference numbers in the Exploded View.
Slider (14)
Pickup (49)
Tray (52)
Pickup chassis (3)
'
DC motor (60)
Gear (21)
Gear (16)
Gear (19)
Gear (17)
Gear (20)
Lever rotary
switch (56)
Gear (18)
Fig. 1 Tray closed status
41
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