Circuit Description - Sony PS-FL1 Service Manual

PS-FL1 /FL1C
1-2. CIRCUIT DESCRIPTION
MOTOR
Motor Internal Diagram
(upper surface)
FG Board
Stator Motor Coil
For this purpose, 256 poles of magnetization (SN
alternately) are shallowly layered on the surface of
the drive magnetizer (8 poles alternately SN) on the
magnet used to rotate the rotor.
The frequencies detected at the FG board are:
33'/3 rpm---- 71.1 Hz
45 rpm---- - -96.0 Hz
(cross-section)
shaft
magnet
FG board
coil
bearing
stator
External View of FG Board (with rotor removed)
FG Board
coil pattern
(256)
(external flux noise negation pattern)