Pioneer PL-200 Service Manual page 15

a
HB
@
Hs
Fig.7-3-a
Fis.
7-3-b
Fig.
7-3.e
Fis.
7-3-f
a
Hs
a
He
3.
Speed
Detection Section
1.
The
speed detection
plate has one rows of
"detection patterns.
"
2.
The bottom surface
of
the rotor
is magnetized
with
200 magnetic poles, and
these
rotate at
a
short
distance above the speed
detection plate.
3.
The output
voltage
from the
detection patterns
has
a frequency
of
55.5H2
at
33-1/3 rpm,
and
of.
7
\Hz
at 45 rpm.
4. The signal
is supplied
to
IC PA2004.
zt
Hg
Fig. 7-3-c
z2
HB
Fig.
7-3-d