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Technics QUARTZ SL-MA1 - Page 11

Technics QUARTZ SL-MA1
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e
Turntable
drive
circuit
Check
of
stop
mode
Procedure
14
1.
Remove
the
connectors
FCN302,
FCN303
and
FCN503
of
control
circuit.
2.
Remove
the
control
circuit
board
setscrews
@)
~
@
and
earth
lead
setscrews
@.
3.
Connect
the
earth
lead
to
the
stator
frame.
4.
Turn
the
power
switch
on
with
care
not
to
short-circuit
the
control
circuit
board.
ar)
[I
©
|_|
FCN503
[
[FCN302
‘
|
t
Ci]
.
—
|
Control
circuits
—|
3!
SLA
te
Jf
c)
|
.
Put
the
set
on
the
repair
table.
2.
Fit
the
turntable
platter
in
place.
the
control
circuit
board.
4.
Press
the
start
key.
power
switch
on
again.
rere
3.
Turn
the
power
switch
on
with
care
not
to
short-circuit
5.
Connect
the
tester
from
underneath
the
set,
and
check.
*The
indication
is
incorrect
because
the
detection
input
connector
of
microcomputer
is
disconnected.
the
power
indicator
keeps
lighting
when
power.
switch
is
pressed
again,
and
then
the
start
key
does
not
work.
In
that
case,
pull
out
the
power
cord
plug
and
turn
the
Also,
SL-MA
@
Arm
drive
coil
circuit
Control
SV
circuit
Ref.
No.
Q
Check
of
drive
coil
conduction
Procedure
1>6
1.
Turn
the
power
switch
off.
2.
Remove
the
lead
connector
of
FCN303.
3.
Check
the
terminal
resistance
of
drive
coil
P.C.B.
FC303.
Es
@
FC303
(Arm
drive
circuit
board)
Terminals
|
Resistance
@®
-®
163
+
5Q
©
-@
113
+
5Q
-@
163
+
52
HS
—
@
mI
327
+
72
1

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