Advertisement
# Phono Motor Fails to Rotate, Fails to Stop
Phone motor fails to rotate, or
Note:
fails to stop
Always
switch the power
off before
connecting
CN2
(Motor
control ass'y connector).
Furthermore, after switching the power
off, also check that there is no voltage across both ends of C7
(Note)
(Power supply ass'y) before connecting CN2.
(If there is voltage,
Check that the connector
discharge the residual charge through a suitable resistor).
(CN2) is secure.
Is IC1 pin 40 at H level
Are auto lead-in and auto-
ae
clint
re nel
Check
the
sensor
circuit
1?
ei
board ass'y.
cubnerms
cord, and at L level when
ae
VES
in the arm rest?
Check
soldering
and pat-
tern around ICI pin 40.
(Note)
Is the same result obtained
when
CN2
is disconnect-
ed?
Does the voltage between
the
CN2
black
and
red
leads register 24 +2V?
Check
the
phono
motor
circuit board
YES
Check
the power
supply
circuit
Is the IC1 pin 13 output
inverted
every
time
the
tonearm
is
moved
back
and forth between the arm
rest and the center of the
record by hand?
Check
the
phono
motor
circuit board
Is
the
same
result
ob-
tained if CN2 is disconnect-
ed?
Check
soldering
and pat-
tern around IC1 pin 13.
25
Advertisement
