JVC L-A31 User Manual

Contents
Page
1.
Specification
..........-.
Beh
aetes
a
ter
edate
eteeet
tal
2.
Names
of
Controls
and
Their
Function
...........2
3.
Exploded
Views
and
Parts
List...
6.2.00
eee
ee
8
3-(1)
Mechanism
Assembly.
......-2-
500
eceeed
3-(2)
Tonearm
Assembly
......
Mo
eeid
ee ele.
ee 60
3-(3)
Mechanism
Base
.........62e200%
6,
eae
yD:
4.
Operation
of
Automatic
Mechanism
........--+..6
5.
Cartridge
Replacement...
2...
002
ce
ese
e
ee
ee
GB
6.
Adjustment
Procedures...
2.0...
cece
cseeercaad
6-(1)
Overhang
Adjustment.
........0
ccc
ee el
* 6-(2) Anti-skating Adjustment. ........00000007
6-(3) Tonearm Lifter Height Adjustment. ........7
6-(4) Auto-return (Lead-out) Adjustment ........7
* 6-(5) Tracking Force Adjustment. .........-..2.7
WARNING! ,
in either direction.
1. Specifications
MOTOR AND TURNTABLE
*
Motor:
Coreless,
DC
type
FG
servomotor
-Drive
system:
Direct
drive
Speeds:
33-1/3
and
45
rpm
Pitch
control
range:
+3%
431
Less than 0.03% (WRMS), 0.015%
(WRMS)* 0.05% (DIN)
Wow and flutter:
Rumble:
More
than
75
dB
(DIN-B)
Speed
detection:
Integrated
frequency
generator
Platter:
Aluminum
alloy
die-casting
TONEARM
Type:
T.H.
(Tracing-Hold
system,
static
balance)
Straight
tubular
arm
Effective length: 220 mm
Tracking error: +3°35’ -0°43'
Overhang: 15mm .
Tracking
force
range:
O—
3g
(0.1
grams
division,
direct
: reading)
Weight range: 8.5-—129
(including headshell)
CARTRIDGE
(not
provided
on
units
for
U.S.A.,
Canada
and
the
U.K.)
MODEL: 2-18
Type:
Moving
Magnet
(Cartridge
body:
MD-1025)
Stylus:
0.6
mil.
diamond
(DT-
21S)
Optimum tracking: 1.75 + 0.25 grams
force
». 2555 1 ak
Page
6-(6) Motor RPM Adjustments ....... igh aes
7. Block Diagrams..... bogiievacese Gietece ts above bie ars ere 48
8. Printed Circuit Board Ass’ y and Parts List . geese
8-(1) TPS-300 Power Supply and LED P. C.
Board Ass‘'y .......02 2c cece eeces bead)
8-(2) MC-942R Motor Driver P.C. Board Ass’'y... . 10
9.
Packing
Materials
and
Part
Numbers
....
- .
cree
ht
10.
Trouble
Shooting
..........
ease
ROE
wot
tisdaes
12
* 90-(1) When turntable operation is abnormal... . 12
11. L-A31 Schematic Diagrams. .....2002005000214
12. Parts List with Specified Numbers for Designated
0 Ce ee eee re ee
13. Accessories List... ..........+.2+... Back cover
When
replacing
the
parts
marked
with
ZY
,
be
sure
to
use
the
designated
parts
to
ensure
safety.
CHECKING YOUR LINE VOLTAGE (For U.S. Military Market and Other Countries)
Before
inserting
the
power
plug,
please
check
this
setting
to
see
that
it
corresponds
with the line voltage in your area. If it doesn’t, be sure to adjust the voltage selector
switch
to
the
proper
setting
before
operating
this
equipment.
The
voltage
selector
switch
is
located
either
on
the
set’s
on
the
chassis.
Simply
insert
a
screw
driver
into
the
voltage
selector
switch
and
turn
it
in
either
direction
while
pressing
slightly
and
in
such
a way that desired voltage marked on the switch is positioned the arrow marked on the .
rear
panel
or
the
chassis.
The
voltage
selector
switch
accommodates
up
to
three
turns
Output:
Frequency response: *
Separation:
Load resistance:
Compliance:
GENERAL
Pawer Source:
Power Consumption:
Dimensions: -
Weight (NET):
FEATURES
. 3 mV (1kHz, 5 cm/sec)
10 to 25,000 Hz
More than 25 dB (1 kHz) '
(with test record TRS-1)
47 kilohms — 100 kilohms
10 x 10° cm/dyne (Dynamic!
30 x 10° cm/dyne (Static)
See page 16
See page 16
11.5(H) x 42(W) x 35.5(D) cm
- (with cover closed)
(Since the dimensions show only
the design measuremen ts, Consi-
deration is required when install-
ing the unit in a limited space such
as a rack.)
5.2 kg (11.4 Ibs.)
(without corrugated cardboard
case)
DC type FG servomotor, Direct Drive tow-row stroboscope,
Oil-damaged cueing, Anti-skating mechanism, All front
operations.
“Measured at attached encoder’s output by K & K measur-
ing method.
."_‘ Design and specifications subject to change twithgut notice.

JVC L-A31 Specifications

General

Brand	JVC
Model	L-A31
Category	Turntable
Language	English