JVC JL-F50 User manual

JL-F50
PR eee Pen ae all hs
Dee IRV e
TURNTABLE
No. 2411
February 1977

JL-F50
Index
No. 2411
Page
1. SpeCiINIGAUIONS- = A a-e & ee Re eee ee Eek eee ee wee Se ae he ee Be a ee 3
2.; PeAUileS. . ov & oie o& Bb ck Se ae Os a ee es ER ee ee oh eS eer 4
3: BIOCKDiadran: «2 4 «4% @-el 3.8 Gi. wh Se ee a es EE ee ee OS SS SS SL 5
4. Operation |
4-(1) Construction Diagram ... 11. 6
AAD\. “Start Mechanisin’c.62. 4-8. he © ER 6 Re ee EK A 6
4-(3) Lead-in Mechanism .......00 0 cee ee ee ee 6
4-(4) Return Cycle Starting Mechanism .... 2... 0 ee ee ee 7
A-(5): ‘Repeat Mechanisi <<» 4.04.08 4 ose eta oo ow le we as, 8
AAG) Reject Mechanism: «<4 4-¢4 «G4 ese SOE KGS OED ae ee ee Ra 8
417). Cueing Mechanisil: <i o 6-6:G boo eke Sica ea HR OES ae SEH wa RS 8
5. Adjustment Procedures
5-(4) ‘bead-in Adiustment: -< # a4 Soh 4b Seo ee ow we RE wr eee a ER 9
5-(2) Lead-out Adjustment . 2... 0 ee ee 9
6. Removal of Chassis Base Ass’y . 2... ee te 10
7. Replacement of Parts
TAA), “CAAMOGG oss 4k Be wee ee a. ae ee es he ee ws ah IS He he 10
7-(2) Chassis Mechanism .... 0. 0. ce ee 10
7-(3) Voltage Setting (for U.S. Military Market and Other Areas) .............. 10
8. Troubleshooting
8-(1) Table of Troubleshooting .. 1.2... ee ee 11
8-(2) Chart 1. Platter does not rotate... 1... 13
8-(3) Chart 2. Platter rotates at high speed .. 2... te ee 14
8-(4) Chart 3. Erratic platter rotation... 0. 1 ee ee 14
8-(5)
Chart
4.
Weak
starting
and
long
rise
time...
2...
ee
ee
14
9. Exploded Views and Parts List
O(7)°
“Player
RSs'y
5.
6-23
Ge
me
%
EE
wh
Oe
BS
ere
ere
ee
ee
ae
S
15
9:(2) -(Mechanisiw. Ass). Gace aera set wha ee bt ete eh aw be Gee ee eae Ss 16
9-(3) Tonearm Ass’y 200. ee 17
9-(4) Parts List with Specified Numbers for Designated Areas ........--++-+---. 17
10. Printed Circuit Board Ass’y and Parts List
10-(1)
TPS-96
Power
Supply
P.C.
Board
Ass’y
..
1...
2
ee
ee
es
18
10-(2) MDC-933A Servo Control P.C. Board Ass’y .. 1. 2. eee ee ee ee es 19
10-(3)
Parts
List
with
Specified
Number
for
Designated
Areas
.......--
502
eee
21
11.
Packing
Materials
and
Part
Numbers
.
.
2
6
6
ee
ee
22
12.
JL-F50
Schematic
Diagram...
6
6
6
23
43.
Accessories
LiISt
s
4
a
0ce
ow
Row
8
Re
re
Se
24

JL-F50
1. Specifications
TURNTABLE
Type
:
Fully
Automatic
Mechanism
Drive
system
:
Direct
Drive
Drive
Motor
:
D.C.
Servo
Motor
Speeds
:
33-1/3
and
45
rpm
Wow
and
Flutter
(WRMS)
:
Less
than
0.03%
(DIN)
Signal
to
noise
ratio
:
More
than
60dB
(IEC-B)
70dB (DIN-B)
Pitch
control
range
:
More
than
+2.5%
Platter
:
12-inch
(31cm)
Die-cast aluminum alloy
TONEARM
Type
:
Statically-balanced
S-shaped
tubular
arm
with
JVC
developed
TH
(Tracing
Holed)
balancing
system
and
with
tracking
force
dial
of
0.1
gram
steps
Effective arm length : 220mm
Overhang
>
15mm
Applicable
Tracking
force
range
:
Oto
3
grams
Applicable
cartridge
weight
:
14-24
grams
(Included
Headshell)
Tracking
error
:
+3°.35',
-0°.43'
CARTRIDGE (Except U.S.A. and Canada, U.K.)
Type
:
Moving
Magnet
(MD-1025)
Stylus
-
0.5
mil.
diamond
(DT-Z1TE)
Optimum
tracking
force
:
2grams
Out
put
:
3mV
(1
kHz)
Frequency
responce
:
10
—25,000Hz
Separation
:
More
than
25dB
Load
Resistance
:
47
—100k
ohms
Compliance
>
25x
10cm/dyne
GENERAL
Dimensions
:
46.0(W)
x
37.7(D)
x
14.5(H)
cm
Weight
:
7.5
kg
POWER
SPECIFICATIONS
|
Line
Voltage
&
Frequency
Power
Consumption
U.S.A.,
CANADA
AC
120V,
60Hz
6.6
watts
|
CONTINELTAL
EUROPE
AC
220V~,
50Hz
6.6
watts
U.K.,
AUSTRALIA
AC
240V~,
50Hz
6.6
watts
U.S.
MILITARY
MARKET
AC
100/120/220/240V
5.3
watts
Selectable,
50/60Hz
OTHER
AREAS
AC
100/120/220/240V
5.3
watts
i
Selectable, 50/60Hz

JL-F50
2. Features
Fully automatic mechanism
* Automatic playing for records of all sizes — 30, 25,
17cm
* Repeat memory facility for automatic playing
repetition. Set the dial to hear up to six repetitions of a
record. Or, set it for infinite repetition.
Automatic reject facility
To stop record play at any point, depress the reject
button, and the tonearm will automatically return to the
rest.
New gimbal support arm
Outstanding tonearm sensitivity is assured, because bearings
for clockwise/counterclockwise rotation are provided above
and under the pivot bearing. Trackability is, thanks to the
TH (Tracing Hold) tonearm system — the axis of the
balance weight is positioned below its fulcrum — superb,
and tracking characteristics are maintained even if a record
is warped or if there is external vibration.
Direct drive
A newly developed 12-pole DC servomotor provides greatly
improved performance. Highly accurate speed control and
freedom from vibration are the performance features
available only in the direct drive system.
No. 2411
Large high-inertia platter
Aluminium
die-cast
platter
having
a
diameter
of
31cm
and
weighing
1.6kg
is
employed.
The
stroboscope
on
the
platter
rim
(33-1/3
r.p.m.)
permits
fine
speed
adjustment
while
a
record
is
being
played.
Diamong stylus
Good
sound
quality
and
long
life
are
ensured
by
the
diamond stylus having a tip radius of 0.5 mil.
Anti-skating mechanism
Anti-skating
force
can
be
adjusted
corresponding
to
the
tracking force.
Front type operating design
All
operational
controls,
start
button,
reject
button
speed
select
button
and
tonearm
cueing
button,
are
arranged
on
the
front
panel
for
easy
operation
when
the
dust
cover
is
closed.
Cueing
In
manual
record
play
the
cueing
device
employs
a
timing
motor
to
provide
soft,
uniform
speed
movement
of
the
stylus
tip
as
it
is
lowered
onto
and
raised
form
the
record
surface,
thus
preventing
damage
to
the
record
surface.
4
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JL-F50
3. Block Diagram
1)
Reverse
electromo-
tive force
signal
Reference voltage
Comparison
Speed adjustment
voltage
Starting platter revolution (refer to Schematic Diagram
on page 23)
When the speed select knob is set to ‘33’, switch S6 is
closed (ON). For 45 rpm, switch S6 is opened. When
the switch S6 is ON, the emitter of X13 is connected to
the earth wire through the resisters for coarse and fine
speed adjustment. The base of X13 is under a reference
voltage of about 2V and the collector of X13 takes an
earth level, causing the base of X12 to take an earth level
at the same time.
Drive circuit
Switching circuit
Active filter and
DC amplifier
Fig. 1
Switching |
signal
DC 18V
power supply
6) If current flows through the base of X12, the platter
rotation is accelerated. If no base current flows, the rom
of the platter tends to decrease. The collector potential
of X13 is determined by its base potential and emitter
resistance. When the X13 collector potential drops by
more than 0.6V from the reference +18V, current flows
to the base of X12, starting accelaration of the platter
rotation.
7) An inverse voltage ripple remains in the X12 transistor
collector. This ripple, in nearly 2.2V sine wave form, is
2) This makes conductive, raising the emitter potential of added to the direct current.
X11 to make X10 conductive. 8) The Hall element switching output is amplified by X5 —
3) The conducting X10 causes X9 to become conductive. X8 transistors to permit switching of X1 — X4
In this condition, the emitters of X5, 6 and X7, 8 are transistors. The collector voltage of transistors X1 — X4
connected to the positive line, allowing the maximum which drives the motor is approximately 6.5Vp-p.
current to flow. 9) To ensure that the same amount of current flows to X1,
4) Therefore, the output of the Hall elements inside the 2 and X3, 4 voltage across R45 is fed back to XTO. This
motor is amplified to the maximum degree, and prevents variations due to the components used.
transistors X1, 2 and X3, 4 connected in series to the * Speed adjustment
ee pee oe by this output, starting the The rpm of the platter can be changed by varying the
Bye aiteceber Get uci cilicinaetnereaeee: Ae eves collector current of X13, which is varied by changing its
electromotive voltage induced in the drive coil of the
motor also increases gradually and, after being
rectified by D1~D4 is stored by C5 and R14.
ce ae
emitter resistance. The rpm drops with reduced current.
Therefore, lower speeds are obtained using higher
resistances and vice versa.
* Power supply
The reference voltage of 18V is generated by a transistor
2SD325(E or D), and a Zener diode. The non-adjusted
output voltage is about 0..V lower than the voltage of the
Zener diode.
No. 24
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JL-F50
4. Operation
4-(1)
Construction
diagram
Mechanical components
Main gear Stopper
al
:
Arm
lever
— Trip lever
=
os
-
j
ANS
‘eB
.
Wad
<i
Q
\para
V/
-
é
Seg
ane
Index
lever
Reject
plate
(3
Select
plate
Reject lever (B)
Reject lever (A)
Fig. 2
Cueing cam
Driving gear *
j
Fi
:
Lilt
YT
Stopper
BZ
|
.
:
Sub
gear
Sr
g
Link
Cueing
lever
a
Fe
|
Elevator
cam
|
<r
aif
=
‘
Switch
lever
Micro switch
Fig. 3
4-(2)
Start
mechanism
When
the
start
rod
is
pulled
in
the
direction
of
arrow
a,
reject
lever
(A)
connected
to
the
rod
turns
in
the
direction
of
arrow
b.
This
causes
the
reject
lever
to
press
against
the
reject
plate,
which
in
turn
rotates
engagement
shoe
in
the
direction
of
arrow
c
to
change
the
cycle
and
start
Operation.
When
reject
lever
(A)
is
pushed
in
the
direction
of
arrow
b,
the
same
direction
as
in
the
starting
operation,
ratchet
cam
boss
(B)is
moved
in
the
direction
of
arrow
d.
The
action
causes
the
reset
plate
to
be
pushed
in
the
direction
of
arrow
e,
The
above
actions
cause
the
switch
lever
(C)
to
move
in
the
direction
of
arrow
f
and
part
©to
separate
from
the
micro
switch
thus
turning
the
micro
switch
on.
(The
micro
switch
in
the
separated
state
is
conductive.)
The
operations
described
above
are
shown
in
Fig.
5.
No. 2411
Main
gear
Switch
lever
|
xO
Trip
lever
“
Reset plate
Sc
Reject
plate.
Wt
;
<6)
cam
ua
w?
f
iz
)
Engagement
OFF
Pr
an06
Micro
switch
o>
(A)
Spring
|
Reject
lever
(B)
|
Rod
(REJECT)
Reject
lever
(A)
a
a
Rod
(START)
Fig.
4
Main
gear
Switch
lever
pe
R
Trip
lever
Beanie
So
se
~
©
|
“ON”
‘Micro switch
Rod (REJECT)
Rod (START)~ jf
Fig. 5
4-(3)
Lead-in
mechanism
When
the
starting
cycle
begins
and
the
main
gear
rotates,
the
driving
gear
is
turned
reciprocally
by
the
link
to
reciprocate
the
elevator
cam,
as
shown
in
Fig.
6.
Main gear Tone arm
Elevator
Driving gear
> out
OAM a
Cae
Elevator cam
inclined face
Fig. 6
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As
the
elevator
cam
moves,
its
inclined
face
lifts
the
elevator,
which
in
turn
lifts
the
tonearm.
In
Fig.
7,
the
lead-in
lever
is
moved
in
the
direction
(a)
by
the
counterclockwise
rotation
(b)
of
the
driving
gear,
as
shown
in
Fig.
6.
As
a
result,
the
lead-in
lever
passes
the
arm
lever
stud
(A)
without
touching
it.
Therefore,
the
arm
lever
does
not
move.
During
the
next
process
shown
in
Fig.
8,
the
lead-in
lever
strikes
against
the
reset
plate
and
is
pushed
back
in
the
direction
(a).
When
the
driving
gear
returns
in
the
clockwise
direction
(B),
this
time
the
lead-in
lever
pushes
the
arm
lever
stud
(B),
and
the
arm
lever
stud
is
moved
in
the
direction
of
the
arrow,
as
shown
in
Fig.
9.
This
finishes
the
final
stage
of
the
lead-in
operation.
Arm lever stud (B) Push lever
Lead in lever
Link
PPPS #5222
Push lever
“—~ Driving gear
Link
Fig. 7
Driving gear Driving gear
Push lever
Push lever
stud (A)
Arm lever stud (A) Lead in lever
Reset plate Reset plate
Fig. 8 Fig. 9
The stylus is positioned at the beginning of a record
according
to
the
record
size
(17,
25,
or
30cm)
chosen
with
the Record Size Select knob. The stylus position ts
determined by one of three steps on the index lever shown
in Fig.10. Part @ of the arm lever engages the
corresponding step on the index lever.
Turning
this
eccentric
adjustment
screw
will
move
the
arm
lever
to
fine-adjust
the
stylus
lead-in
position.
iy oe
JL-F50
Select plate
P Select knob
Fig. 10
4-(4)
Return
cycle
starting
mechanism
The
relationship
between
the
notch
in
the
main
gear
and
the
platter
gear
while
a
record
is
being
played
is
shown
in
Fig.
11.
In
this
condition
the
main
gear
does
not
rotate
as
the
platter
rotates
because
the
platter
gear
and
main
gear
are
not
engaged.
As
playing
proceeds,
however,
the
arm
lever
presses
the
trip
lever
to
gradually
more
the
lower
trip
and
the
engagement
shoe
on
the
main
gear.
Projection
Engagement
shoe
Platter gear
Main gear notch
Fig. 11
Boss Main gear
Engagement ;
Shoe
Projection
Platter gear i ~ Stud
Lower trip
Fig. 14
The relationship between the engagement shoe and the
platter gear comes to a state shown in Fig. 12. In this
condition, during the time in which the pitch of the grooves
is small, the movement of the engagement shoe is sinall.
The engagement shoe is thus pushed back by the nose of
the engagement shoe, the main gear being still.
When the stylus comes into the lead-out groove having a
large pitch at the end of a record, the movement of the
engagement shoe becomes larger than the reverse Movement
caused by the projection nose, entering the state which is
shown in Fig. 13,. where the projection presses the
engagement shoe to cause the main gear to rotate.
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JL-F50
When the main gear notch moves away, both the gears
come into engagement, tripping the returning cycle.
After
one
complete
revolution
of
the
main
gear,
it
will
return
to
the
position
as
shown
in
Fig.
11.
The
main
gear
will
stop
rotating
while
the
platter
gear
is
still
turning.
As
the
main
gear
turns,
the
engagement
shoe
and
the
lower
trip
are
returned
by
the
outer
edge
of
the
platter
gear
to
the
original
position
just
before
the
rotation
of
the
main
gear
is
finished.
The
trip
lever
also
returns
to
its
original
position
on
the
boss
on
the
face
of
main
gear
halfway
through
the
main
gear
rotation.
4-(5) Repeat mechanism
Setting
the
REPEAT
knob
to
one
of
the
positions
“1”
through
'’6’’
will
cause
the
tonearm
to
return
from
the
end
of
record
to
the
beginning
lead-in
position
and
play
it
again.
The
same
process
will
be
repeated
up
to
six
times,
depend-
ing
on
the
setting.
Setting
the
knob
to
“R”’
will
cause
the
tonearm
to
play
the
record
over
and
over
again
endlessly.
Lead in lever
Switch lever Driving gear
Arm lever stud
idler gear
Sub gear
Micro switch
Ratchet cam
(Attached to
Repeat Knob)
Reset plate
Fig. 15
As
shown
in
Fig.
15,
when
the
ratchet
cam
is
turned
in
the
direction
of
arrow
(a)
(toward
the
position
‘’R’
on
the
REPEAT
knob),
the
part
@)
of
the
reset
plate
is pushed
away
by
the
outer
circumference
of
the
ratchet
cam
until
its
part
is
moved
as
far
as
the
dotted
line.
Thus,
the
lead-in
lever
on
the
driving
gear
is
always
returned
by
the
reset
plate
and
pushes
the
arm
lever
stud
back
to
bring
the
arm
lever
to
the
lead-in
position,
and
the
record
is
played
again.
At
the
‘’R”
position
the
hook
on
the
sub
gear
passes
over
the
toothless
section
of
the
ratchet
cam,
so
the
cam
does
not
turn.
If
the
ratchet
cam
is
set
to
one
of
the
positions
‘’1’’
through
“6”
on
the
REPEAT
knob,
the
ratchet
cam
and
the
hook
on
the
sub
gear
engage
after
every
time
one
record
has
been
played,
as
shown
in
Fig.
16.
Thus
the
cam
turns
one
step
for
each
cycle.
After
comple-
tion
of
the
specified
number
of
cycles
the
ratchet
cam
and
hook
do
not
engage,
and
the
reset
plate
returns
to
the
position
as
shown
in
Fig.
15.
As
a
result,
the
lead-in
position.
The
tonearm
is
returned
to
the
arm
rest,
and
the
power
is
turned
off
when
the
switch
plate
presses
the
micro
switch.
No. 2411
Switch plate
Switch plate
Sub gear
Toothless section-
(two teeth)
Fig. 16
4-(6) Reject mechanism
When
the
reject
button
is
depressed
in
the
play
mode,
the
reject
rod
moves
in
the
direction
of
arrow
(a).
This
movement
causes
the
reject
plate,
trip
lever
and
engagement
shoe
to
move
in
the
direction
of
arrow
(c),
whichi
changes
the
cycle
and
start
operation.
Main
gear
Switch
lever
| 0
Trip lever 4p
© /
(c)
Reset plate
Cy Ratchet cam
Reject
plate
Ube
iN
~~
(Attached
to
Engagement
(d)
\c
(>)
Repeat
knob)
shoe a (bk Bw. S
ime)
Micro switch
Reject lever (B)
Reject
lever
(A)
Rod
(REJECT)
(a)
Fig. 17
If
the
REPEAT
knob
is
at
‘1’’,
the
reset
plate
engages
with
the
section
(A)
of
the
ratchet
cam,
and
the
switch
lever
|
moves
in
the
direction
of
(d)
to
push
the
micro
switch,
turning
the
power
off.
4-(7) Cueing mechanism
Depressing
the
‘‘UP”
button
actuates
the
micro
switch
and
rotates
the
cueing
cam.
When
the
cueing
lever
is
pushed
by
cam
A),
the
rod
moves
in
the
direction
of
arrow
a,
thus
rotating
the
elevator
cam.
The elevator is raised by cam C.
The
cueing
cam
makes
a
quarter
rotation
to
turn
the
micro
switch
off
with
cam@).
Depressing the ‘‘DOWN” button causes the cueing cam to
rotate the same as in lifting. The rod then moves in the
direction of arrow b and the elevator is lowered.
Cueing cam
Micro has
Tone arm
\_ Elevator ‘
Cam®@®
=/
vv
Driving
gear
\
t Oe
ueing lever
Cam © g
Elevator cam
i
;
fd
¢
{
i
a
i
4
'
3
4
4
i
58 ALND Ak ARATE TSS a RRS

JL-F50
5. Adjustment Procedures
5-(1) Lead-in adjustment
SPEED SELECT
Push Knob
33-1/3rpm
45rpm
REPEAT Knob
RECORD
SIZE
SELECT
Knob
CUEING Push Knob
(DOWN)
REJECT Push Knob
START Push Knob
CUEING Push Knob
(UP)
SPEED CONTROL
Knob
The adjustment screw for
changing the tone arm lead-
in position is below the hole.
ee
Fig. 20
The stylus lead-in position has been adjusted at the factory
so that the stylus lands correctly onto the lead-in groove of
a record. However, the position may need adjustment if
the tonearm is replaced. Follow these steps to adjust the
lead-in position:
1. Put the 30cm JVC test record (RG324) on the platter.
2. Set the RECORD SIZE select knob to ‘17’, and start
automatic playing. If the stylus comes in contact with
the test record while the voice is counting In a range
between 7 and 29, the lead-in position is correct. If not,
turn the adjustment screw with a screwdriver clockwise
to move the lead-in position towards the center of the
record, where the lead-in count increases, or counter-
clockwise to move the lead-in position towards the outer
rim of the record, when the lead-in count decreases.
Note: The normal lead-in count range is shown below. If
you adjust so that the lead-in count is 18 for a 1/cm
record the lead-in count for both 25cm and 30cm
records will be automatically set within the normal
range.
Fig. 19
Normal lead-in count range
Record size
17cm ( 7”)
25cm (10”)
30cm (12")
5-(2) Lead-out adjustment
The
correct
lead-out
adjustment
has
also
been
made
at
the
factory,
but
its
adjustment
is
necessary
after
replacement
of
a
tonearm
or
for
other
reasons,
follow
the
steps
below.
Fig.
21
shows
the
mechanism
after
removal
of
the
platter.
won yy Main gear
x
My
Trip lever
Lead-out adjustment screw
Fig. 27
* If lead-out does not occur:
Play the 17cm JVC test record (RG652) having a
lead-out groove pitch of 3mm. If the change cycle does
not begin when the stylus reaches the lead-out groove,
turn the lead-out adjustment screw clockwise in the
direction of arrow (a) as shown in Fig. 21.
If lead-out occurs too soon:
If the change cycle begins before the stylus comes to the
lead-out groove of the 17cm JVC test record (RG653,
back side of RG652) turn the screw counterclockwise in
the direction of arrow (b).
Caution: Unplug the power cord first.
1. Clamp the tonearm to the arm rest.
Remove the dust cover.
Remove the rubber mat, the platter, and the belt.
Turn the set upside down, and place it on blocks to
protect the tonearm assembly, spindle shaft and pulley.
After removing the signal and power cord assemblies
from the bottom board, remove the eight screws fixing
the bottom board.
2.
3:
4.
a:
No. 2:

No. 2411
JL-F50
6.
Removal
of
Chassis
Base
Ass’
y
Procedure:
Remove
the
all
screws
(Item
No.
1
through
No.
14)
arrowd
in
Fig.
22.
Bottom View
@
®@ ® © ©©
Oo OM. O@. 2. O ®
Fig. 22
7-(1) Cartridge
1. Unscrew the connector nut to remove the headshell.
2. Remove the two long screws on the headshell which
hold the cartridge.
3. Connect the lead wires of the headshell to the new
cartridge, being careful to match the polarities correctly.
Polarity and wire colors are as follows:
White(+): secae Ls Red (4a R
Blue(—) os. EE Greer: (=)... RE
4. Attach the cartridge to the headshell squarely, and
gently tighten the screws.
5. Set the tonearm cueing lever to ““DOWN"”, and then
bring the sytlus tip to the overhang indicator by sliding
the cartridge back and forth.
After the adjustment, fix it firmly.
6. After attaching the cartridge, slide the headshell into the
tonearm with the connector pin fitting in the groove.
Tighten the connector nut.
7. Be sure to adjust the tracking force and lead-in position
after replacing the cartridge.
Groove ~ Headshell
Connector pin
Headshell
Cartridge pin
Connector nut
_ Stylus
Cartridge Body
ay _ Nut
&
Fig. 23 ee -
Fig. 24
7-(2) Mechanism chassis
When you replace the entire mechanism (or the driving gear
only),
be
sure
to
check
that
the
lead-in
lever
attached
to
the
driving gear has been returned in the direction of arrow (a)
as shwon in Fig. 25. (The lead-in lever faces in the
direction of arrow (b), the mechanism may malfunction or
be damaged.)
lead in lever
Fig. 25
7-(3) Voltage setting
(for U.S. Military Market and Other Areas)
Although
this
set
is
pre-set
for
the
use
on
your
area's
AC
line
voltage
without
any
re-adjustment,
it
can
be
used
on
all
AC
voltages
in
the
world
through
following
adjustments.
To change the voltage, remove a bottom board, and replace
the plug so that the required voltage, marked on the socket,
may come out in the window of the voltage selector plug.
Do not forget to replace the fuse as well with one of
appropriate capacity.
100 120 220 240
(OO GO sis]
oO Soothe O
Fig. 26

dated sntesisiealty Anca inet
JL-F50
8. Troubleshooting
8-(1) Table of Troubleshooting
Platter does not rotate when
tonearm is moved to manually
or by automatic start opera-
tion.
1. Motor is not powered. * Check if the power cord is plugged in
and the fuse is blown when the neon
lamp also does not light.
* Check the transistors in the power
circuit. (Check if 18V is availabie
at the motor terminals.)
* Check voltage of each part of the servo
circuit board.
* Adjust the switch lever for correct
clearance.
2. Motor and motor circuit are
defective.
3. Switch lever remains in contact
with the switch.
1. The circuit board is out of fine
adjustment.
Platter speed is not correct.
* Adjust so that it rotates correctly for
both 33 or 45 rpm.
Motor rotates at a high speed
without being controlled by
the servo system.
1. The printed pattern is short-
circuited.
(Capacitors, particularly C5
should be checked carefully.
* Separate the short-circuited points.
Motor rotates unbalancedly.
1. Platter is not correctly fitted on
the shaft.
2. Any one of transistors X1-X8 is
defective.
* Fit the platter on the motor shaft
correctly.
* Check voltage for X1-X8.
1. Either one of the Hali elements
is defective.
2. Input or output of the Hall
elements is incompletely soldered.
Platter stops at a point when
held by hand.
(Dead point occurs.)
* Replace
* Solder it completely.
Tonearm does not lead-in.
(Player does not start.)
1. Platter does not rotate.
2. Change cycle does not start.
Refer to the above-mentioned column.
* Check that the engagement shoe oper-
ates smoothly, and that it is pushed
away fully when the start knob ts pulled.
* Set lead-in lever to the proper inward
position.
sister Ba a not Bila RL,
3. Lead-in lever on driving gear is
turned toward the outside of the
gear and is blocked by the arm
lever stud.
Tonearm lead-in position goes 1. Arm lever adjuster is not firmly * Be sure to tighten the Knurled washer
out of adjustment. fixed, allowing movement. to lock the adjuster.
Arm lifter lever moves incor- 1. The lead wires of the tonearm * Slacken the lead wires to avoid any un-
rectly. are too tight or tangled. wanted force on the tonearm pivot.
2. Elevator slips on the tonearm * Wipe the elevator face.
pipe.
Tonearm does not stop at the 1.
correct position of a record,
and moves to the inside.
Index lever does not operate
correctly.
* Check that the index lever operates
smoothly under the action of the
spring.
* Check that trip lever returns after com-
pleting the change cycle, and that the
engagement shoe moves smoothly and
freely with its own weight.
SSS i i a ate A lS STEREOS AIS BERTONE AN SARA O RG
Change cycle will not stop. 1. Trip lever and engagement shoe
of the main gear malfunction.
No sound is reproduced while
playing.
1. Cartridge is defective.
2. Wiring is not correct. (Live and
earth are connected inversely.)
3. Stylus is defective.
4. Amplifier is defective.
* Replace.
* Check the wiring.
* Replace.
A
No.
2

JL-F50
“Sk A sods i sap acindunis tose apa raed manptaabeisae a
Stylus
does
not
follow
the
1.
Dust
or
foreign
matter
is
in
the
*
Clean.
groove
correctly.
record
groove.
2. Stylus is dirty or defecitve.
3. Lead wires in tonearm are
tangled or too tight.
4. Tracking force is abnormal.
5. Tonearm bearings have too
much friction.
Motor
rumble
is
heard
while
1.
Motor
is
defective.
playing.
2.
Transformer
is
defective.
Tonearm
does
not
lead-out.
1.
The
lead-out
groove
is
not
standard.
* Clean or replace.
* Slacken the wires.
* Adjust.
* Replace tonearm.
*
Bearing
shake
is
excessive.
Replace
it.
*
Check
if
the
transformer
is
floating.
*
It
may
not
lead
out
when
old
or
non-
standard
records
such
as
film
records
are
used.
*
(ead-out
will
not
occur
if
the
pitch
of
the
lead-out
groove
is
less
than
3mm.
*
Check
if
the
tracking
force
is
correct.
*
Check
if
trip
mechanism
does
not
oper-
ate
smoothly.
*
Check
if
the
stylus
tip
is
damaged
or
dirty. |
Reject
operation
does
not
1.
Engagement
shoe
is
not
pushed
*
Check
the
trip
mechanism.
work,
away
fully.
Repeat
operation
does
not
1.
Switch
plate
malfunctions,
and
*
Check
that
switch
plate
and
reset
palte
work.
switch
turns
off.
operate
smoothly.
Platter
does
not
shut
off.
1.
REPEAT
knob
is
set
for
repeat
*
Set
the
knob
to
‘‘0”.
playing.
Power
does
not
turn
off
after
1.
Switch
is
defective.
*
Replace.
reject
operation
with
the
2.
Switch
button
is
not
fully
*
Adjust
so
that
lever
fully
presses
the
REPEAT
knob
at
0”.
pressed
by
the
switch
lever.
switch
button.
Cueing device is defective
2. Stylus does not advance.
j
;
3
i
‘
'
4
Replace
Replace the timing motor.
1. Switch is defective.
2. Switch lever or cueing cam does
not apply sufficient pressure to
operate the switch.
3. Timing motor is defective.
ec Ne cL ee Oe en ee ee eee aces
No. 2411 = 4

8-(2)
Chart
1.
Platter
does
not
rotate
Platter does not rotate.
Is +18V
present at the
emitter of
X101?
Yes .|Replace the
fuse.
Is neon lamp on? Yes
Is the fuse blown?
Is AC26V
present at second-
ary transformer
ace may be disconnected.
terminals:
Yes
Is 18V
present at the
base of X101?
Yes
X101 may be opened.
Gold plate wire used
if head shell ass’y is
purchased.
Does platter
rotate when
collector and
emitter of X13
are shorted?
X11 or X13 are defective.
No .| Transformer or lead wire
Yes
Is current
available at the
terminal on
motor circuit
board?
No
Fuse (0.5A) may be dis-
connected or C805 may
be shorted.
Check X13.
If it isn’t
defective
Yes
Check D5,6,7 and
D11 which pro-
Is 0.4Vp-p
Is the Se ee output available
speed selector Short circuited between between S1~4 respectivel
micro switch Yes collector and emitter of and earth when a revolution
normal? x9. roughly corresponding
to 33-1/3 rpm is
| given to the
Rotation at a high speed. platter?
; No
t Transistors X1 through
oO
mally.
Micro switch or its lead
wire and socket may be
poorly connected.
No
Replace X9.
Is 1.8Vp-p
waveform available
at the bases of X1,2,3
and X4?
Yes
duce standard vol-
tage or check if
standard voltage
2V is present at
the base of X13.
Replace the transistor(s)
that have no voltage.
wre: ac gee
Does platter
rotate when the
collector and emitter
of X10 are
shorted?
X8 are operating nor-
When no output is available,
resistor R12 or R13 may be dis-
connected. When output is
available at either one of the
terminals, Hall elements may be
defective or their connection
terminals may be disconnected.
Yes
Does platter
rotate when the base of
X11 is earthed?
X10 or X11 are defective.
Is 5Vp-p
drive wave
available at the
collectors of X1,2,3
and X4?
Replace the transistor(s)
that have no voltage.
| JL-F50
Yes
Motor wire or coll
may be disconnected.
No. 2411
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Seagate i RS Sin aaa i Re RSE Sal AR DE GRE EAE SEAR a eae

8-(3) Chart 2. Platter rotates at high speed
( Platter rotates at a higher speed.
Does the
rotation stop
Yes Circuit is normal
when the base of X9
between X9 and
and
18V
line
drive
circuit.
are shorted? Check preced-
ing parts of the
Circuit.
Does the rotation stop
when the collector of
X9 is earthed?
Collector and emitter of
X9 are shorted.
Replace XQ.
8-(4)
Chart
3.
Erratic
platter
rotation
Erratic platten rotation
When the condensor C5
Is open
If the registor R10 or R100
is adjusted improperly.
The rotation accelerates
and the ripples across
resistor R14 increase.
Voltage changes from
40mV to 400mV.
Speed drift is so great that the
rotation stop when
the base of X10
Collector and emitter of
X10 are shorted.
Replace X10.
| JL-F50
Does the
rotation stop
when the base of
X12 is connected
to +18.0 line?
| Does the
Yes rotation stop Yes
when the base of
X11 is earthed?
Does the
is earthed?
No No
Check if collector and Check if collector
emitter of X11 are open. and emitter of X12
Check for incomplete are shorted.
soldering. If so, replace it.
Is the
resistor R16
disconnected? Is
DC voltage from 4 to
6V present at the
both ends of
R14.
If no voltage is present,
either C5 is shorted, or
the +pole of C5 is touch-
ing the +18.0 line.
8-(5) Chart 4. Weak starting and long rise time
Weak starting torque and long rise time
Starting torque is weak,
but a small push starts the
turntable, which then runs.
Fluctuation is
produced.
ls power voltage of about
18.5+0.8V present at emit-
ter of X101?
In the case of improper adjustment,
voltage changes to 120mV and re-
volution becomes incorrect.
Re-adjustment is required.
In the case of the proper adjustment,
* the voltage is 40mV.
This condition is produced
when one of the transistors
from X1 through X8 Is open.
The Zener diode D105 or
the transistor X101 are de-
dective.
platter rpm may be as high as
45 rpm when the speed select
switch is set to “’33”.
When the diode D11 is shorted,
the speed fluctuates and rpm
increases by 5 to 6%.
Diode D11 inside
the motor is open.
Replace defective
parts.
No. 2411 <4 =
Collector and
emitter of X13
are shorted.
Replace tran-
sistor(s) if
defective.

| JL-F50 |
9. Exploded Views and Parts List
9-(1)
Player
Ass’y
|
|
Cho.
[PansNo.
[Description
[Farts
No
[Description
1
*See
page
17
Cabinet
Ass’y
41
SBSB3010Z
|
Tapping
Screw
(Refer
to
table
1)
42
E48820-001
EP
Adaptor
91
“See
page
17
Timing
Motor
Cabinet
(Refer
to
table
1)
(Refer
to
table
1)
*See page 17
*E34980-001
Front
Panel
(A)
92
*E61705-001
Motor
Holder
a
ee
94
|
sasegoosz
|
Tapping
Screw
*£61690-001
eee
95
Micro
S.W
(Refer
to
table
1)
SPSP3O05NS
|
Screw
os
an
oo
83
|
cawrivor
a)
*E61709-001
Change
Lever
Ass’y
=
LPSRSOIOZS
|
Assy
Screw
*See page 17 Tonearm Ass’y
(Refer to table 1)
Screw
Push Knob Ass’y (‘’45"’)
(“’33’’)
E61850-001
*E35024-001
*E35024-002
*E35024-003 i" (“UP”)
*E35024-004 (“DOWN”)
*E35024-005 ’ (“REJECT”)
*E35024-006
E61686-001
QVF1A2B-013
*E61712-001
*E61713-001
(“START”)
Knob Ass’y
Variable Resistor
Volume Bracket
Volume Knob ~
15 SBSB30082Z Tapping Screw
16 *QLN3104-003 | Neon Lamp
es
17
*E61763-001
Lamp
Holder
18 See page 17 Power Transformer
(Refer to table 1)
19 E61825-001 Holder
20 E61824-001 Cushion
21 SBSB3016Z Tapping Screw
22 “See page 17 P.C. Board Ass‘y
(Refer to table 1)
23 Fuse (Refer to table 1)
2
24
nw
(
"
)
¥
25
Fuse
Label
(Refer
to
table
1)
26 *F5001 Base Ass’y (
27 *MC933A Motor Ass’y
28 *See page 17 Turntable Covering
(Refer to table 1)
29 *E22340-001 Turntable
30 E61136-002 Storobo Plate
31 — See page Power Cord (Refer to table 1)
32 QHS3876-162 | Cord Stopper
33 *E61695-001 Cord Stopper Plate
G30062-5
QML1310-051
Signal Cord Ass‘y
Lug Strip Ass’y
E60090-002 Shield Cover
=
3
F33944-001
Cord
Stopper
Nin
2
cc
E34993-004
|
Dust
Cover
Ass’y
23
oat
E10156-002
|
Dust
Cover
i
re
F60990-001
|
Lock
Plate
SHSP3010RS | Screw
Fig.
27
*See
page
17.
|
Bottom
Board
Ass’y
(Refer to table 1)
Foot Ass’y (Refer to table 1)
”
—
15
—
No.
2411

9-(2)
Mechanism
Ass’y
Fig. 28
No. 2411
*E10175-002 Base Sub Ass’y
E21913-002 Main Gear Ass’y
E49627-001 Engagement Pawel
E60380-001 Lower Trip Pawel
REE2000 “E-typed”’ Ring
REE5000 “E-typed”’ Ring
E60381-001 Lever
E60844-001
WNS3000N
LPSP3008ZS
E60449-001
E34234-001
REE3000
E60383-001
G41507-001
E60384-001
E60395-001
E60394-001
Spacer
Washer
Ass’y Screw
Flywheel Gear Ass’y
Trip Ass’y
“E-typed”’ Ring
Stopper
Tapping Screw
Spring
Reset Plate
Switch Plate Ass’y
E60396-001 Spring
WNS4000N Washer
E34236-002 Driving Gear Ass‘y
E60400-001
E60405-002
E34238-001
E60407-001
E60489-001
E604 15-001
E60416-001
Idler Gear
Sub Gear Assy
Ratchet Cam Ass‘y
Ratchet Lever
Spring
Reject Plate
Spring
*E61699-001 Reject Lever (A)
*E61700-001 " (B)
E61701-001 Reject Rod
E61702-001
E61703-001
Rod Holder
Push Lever
E60425-001 Index Ass’y
E60426-002 Lever
E60427-001 Spring
E60422-003
E60424-001
Select Plate
Select Lever Shaft Ass’y
E60488-001 Spring
G41505-5 Steel Ball
E34237-002 Link
E60900-001
G4942-4
Cushion Spring
Speed Nut
E60390-002 Elevator Cam
“E49596-001 Spring
*E61704-001 Rod
*E61706-001 Cueing Lever
—i1i6—
eat Rat a ae th 8 a i a ee Pe a ek a

9-(3) Tonearm Ass’y
Tonearm Ass’y
Power Transformer
P.C. Board Ass’y
Turn Table Covering
Bottom Board Ass’y
Two
|
ParsNo.
[Description
+)» [No
|
Perm
No.
*E22324-002 Tonearm Ass‘y
*E21985-004
*E35050-001
Elevator Shaft
“E-typed” Ring
Main Weight Ass’y
Tonearm Base Ass’y
Tonearm Base Sub Ass’y
Anti-skating Knob Ass‘y
Arm Lever Ass‘y
Tapping Screw
Headshell Ass’y
Thrust Washer
Anti-skating Cam
Headshell Body
Tapping Screw
Arm Rest Ass’y
Tapping Screw
See right table
131 Needie Cover
132 Screw
SSSP3016MS
Elevator Ass’y
£49649-001
U.S.A. & Canada
E22339-001
E10173-001
ARM-518
E03032-23B
TPS -96J(U.S.A)
TPS-96N (Canada)
QMF61U2-R30
(0.3A)
E61378-013
E22375-004
QMP 1200-244
E22342-003
E35118-002
EE 35032-002
QSM1V01-018
QSM1V01-019
QSM1V01-013
E60502-002
E22339-003
E10173-003
MP-174S
E03032-23C
TPS-96L
QMF51A2-R10
(0.1AT)
QMF51A2-R50
(O.5AT)
E22375-003
QMP3910-244
E22342-004
E35118-001
E35032-003
QSM1V01-022
QSM1V12-101
QSM1V 11-101
MD-1025
DT-Z1TE
E34268-001
( Table 1)
E22339-002
E10173-002
ARM-518
E03032-23CBS
TPS-97ABS
QMF51A2-R10BS
(O.1AT)
QMF51A2-RS50BS
(0.5AT)
E22375-003
QMP9017-007BS
E22342-004
E35118-001
E35032-003BS
QSM1V01-022BS
QSM1V12-101BS
QSM1V11-101BS
E60502-002
9-(4) Parts List with Specified Numbers for Designated Areas
E22339-003
E10173-003
MP-174S
E03032-23C
TPS-96M
QMF51A2-R10
(0.1AT)
QMF51A2-R50
(0.5AT)
E22375-003
QMP2500-200
E22342-004
E35118-001
E35032-003
QSM1V01-022
QSM1V 12-101
QSM1V11-101
MD-1025
DT-Z1TE
E34268-001
| JL-F50
U.S. Military
Market and
Other Countries
E22339-003
E10173-003
MP-174S
E03032-23D
TPS-96K
QMF60S 1-R30
(0.3A)
or
QMF6O0R1-R20
(0.2A)
E61379-019
E22375-003
QMP 1200-244
E22342-006
E35118-001
E35032-002
QSM1V01-018
QSM1V01-019
QSM1V01-013
MD-1025
DT-Z1TE
E34268-001
No. 2411
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| ——«SL-F50
10. Printed Circuit Board Ass’y and Parts List
10-(1) TPS-96 Power Supply P.C. Board Ass'y
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E35019-001
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Fig. 30
Applies to : TPS-96J (for U.S.A and Canada) TPS-96M (for Australia)
TPS-96L (for Europe) TPS-96K (for U.S. military Market and Other Countries) ~
Transistor
X101 25D325(E)
escription
ee
D iodes
D101~D104 $!B01-02 Silicon
D105 WZ-192 Zener
Capacitors
See page 21 (Refer to table 2)
Fuji Denki
Shin Nihon Musen
QEW41VA-477M Electrolytic
QEW41VA-107 v
OQEW41HA-476 t
No. 2411 * ae
C802
R8oOl
C80!
a
TPS—-97 E35020-00! FUSE 100mMAT (1)
+
aise
hs
"
DIO!
FUSE
500mAT
T
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Foe
Ff
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rn
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an
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C804
DIO3
Fig. 31
Applies to : TPS-97A (for U.K.)
Resistors
ORGO17J-153S Uninflammable O.M.
OQRG129J5-681
QRX129J-100
Others
See page 21 Circuit Board (Refer to table 2)
E43727-002 Tab
E40130
"
See page 21 Fuse clip (Refer to table 2)
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JL-F50
10-(2)
MDC-933A
Servo
Control
P.C.
Board
Assy
ary
jun
Fe
a 22K F
a
18K-
3.9K
D9 vo121
DB .,V01220
—— Ht
R26
RA7
D5 RDS.GEKVM2
Riga)
WY) OC az
£
Ou/i6y
18K
MSET RS 3]
Pet
RAI 3.9K
hoe a)
Ts,
we)
Fg
R35
R36
ATOZ)
Transistors
Part Number
— 2SD571
2SA733
(K,L)
~—110MHz
|
Sili
Nihon
Denki
(P
25C945(
(
(
,Q)
~180MHz
_P)
250MHz
2SA733
25C945
K
K) | 180MHz
K,P) - 250MHz

SE aD ance bath li daa ES
JL-F50 |
Diodes
1$953(A)
Silicon
Nihon
Kenki
RD5.6EKVM2,
Zener
RD6.2EKW M2
VD1220
Varistor
"
VD1121
QEW41CA107
QEW41EA335
QEW41EA475
QEW41HA225
QEW41CA106
QEW41HA474
QEW41CA106
ORD141J-104
QRD141J-680
ORD141J-151
ORD141J-470
ORD121J-471
ORD141J-273
ORD141J-123
ORD141J-122
ORD141J-222
ORD141J-681
ORD141J-823
ORD141J-682
ORD141J-103
ORD141J-392
ORD141J-913
a bsp EARLE Rach th de ae wea FEE
a
a
it
R33 QORD141J-153
R34 QORD141J-123
R35 ORD141J-273
R36 ORD141J-183
R40 ORD141J-332
R42 ORD141J-122
R43 QORD141J-392
R44 ORD141J-471
R45 ORD121J-2R7
R46 ORD141J-683
R47 OQRD141J-183
VR1i~VR2
OVP8A0B-053
Variable
Resistor
"
VR3 QVP4A0B-331
Others
M30387
Circuit
Board
M40244
Tab
QXT310H-015
Vinyl
Tube
M40243-2
6¢
x
12mm
Silicon
Tube
No.
2411
—~20—