JVC L-F66 User Manual

9-(2) Turntable rotates at high speed
| The turntable rotates at high speed.
Does the turntable
stop when TP-3 (the
collector of X13) is
grounded?
Does
the
turntable
stop
when
the
base
of
X11
is
connected
to
the
+24
V
line?
Does the turntable
stop when the collector of
X11 is grounded?
The circuit near and connected to
the connection pattern of R11 and
R12 is in contact with the +24 V
line.
Connect the base of X11 to
the +24 V line, stop the drive
circuits, then...
Check
to
see
whether
a
short-
circuit
is
made
between
the
collector
and
emitter
of
X810,
etc.
When thhe turntable is
rotated by hand ast about 33-1/3 RPM,
does the FG ouytput of 0.8 mVp-p
anppear?
Check the connection of the FG pattern,
to
see
whether
the
rrotor
magnet
is
floating,
etc.
Check to see whether a short-
circuit is made between the
collector and emitter of X11,
ete.
Replace
the
element
which
is
open.
Replace X16.
No. 2526 =
Does about 2 Vp-p appear
at the Pin 1 of 1C1?
2Vp-p
Does 15.1 V appear at
Pin 8 of 101?
Check
the
connection
of
the
printed
pattern,
the
soldered
points
of
the
components,
etc.
Is C7 or D1 open?
Is X16 open between
its
collector
and
emitter?
X15
or
C6
is
dectetive,
or
the
like.
1C1 is defective,
or
the
capacity
of C11 is lost,
‘or check the
connection of
R42, etc.
Does
@
square
wave
appear
at
TP-1
(the
Pin
7
of
1C1)?
1C1
is
defective,
the
capacity
of
CQ
is
lost,
or the
like.

JVC L-F66 Specifications

General

Brand	JVC
Model	L-F66
Category	Turntable
Language	English