Garrard 401 Manuel utilisateur
GARRARD
MODEL 401
TRANSCRIPTION TURNTABLE
Instruction Manual
GARRARD ENGINEERING LIMITED NEWCASTLE STREET SWINDON WILTSHIRE
As the owner of this Garrard Model 401 Transcription Turntable you
have a product supreme in its class which will maintain its high
standard of performance throughout many years of use, with the
minimum of attention. This manual will help you to operate and take
care of your Model 401 but, if you require any further advice, please
do not hesitate to contact your Garrard Agent, or our Technical
Service Department at Kembrey Street, Swindon, Wiltshire,
Telephone Number Swindon (0793) 6211. Telex 44180.
This manual is supplied with Model 401, Serial No. ...................
preface
2
3
THE GARRARD MODEL 401 TRANSCRIPTION TURNTABLE
page 4 general information
page 5 technical specifications
page 6 operation
page 7 maintenance
page 8 adjustments
page 11 installation
page 14 servicing
page 15 spare parts, diagrams
page 17 spare parts list
The Garrard Model 401 is the culmination of half a century of experi-
ence in the design and manufacture of high quality record playing
equipment and has the elegant appearance characteristic of the best
British engineering products.
The superlative performance of this model is achieved by such fea-
tures as a heavy, balanced turntable with a robust, super-finished
spindle and a sturdy intermediate driving wheel.
Each speed can be set precisely by means of a special eddy current
braking system and stroboscopic markings on the turntable illuminat-
ed by a high-intensity neon lamp.
Every Model 401 is supplied complete with a set of fixing screws,
an adaptor for playing records with 1.5in (38 mm) centre holes,
lubricating oil, a mounting template, an individual test report and full
instructions.
contents
general information
4
Turntable:
Diecast aluminium with an anti-static rubber mat and stroboscopic
engraving on rim for 331/3, 45 and 78 rev/min at 50 c/s. A version for
60 c/s is also available. It is accurately balanced, has a diameter of
12 in (305 mm) and weighs approximately 6 lb (2.5 Kg).
Base Plate:
Die cast aluminium, ribbed for rigidity.
Motor
Shaded-pole induction type, magnetically screened by a heavy cast-
iron case and suspended on 6 tensioned springs. The rotor is dynam-
ically balanced within exceptionally close limits.
Voltage:
Dual range-110/125 and 220/250 volts a.c. A separate neon lamp is
required for each range.
Frequency:
50 or 60 c/s, dependent on the motor pulley and turntable fitted.
Alternative pulley and turntable available.
Power Consumption:
Approximately 12 watts.
Wow:
Less than 0.08% r.m.s.
Flutter:
Less than 0.04%r.m.s
Rumble:
Negligible
Insulation:
Tested at 1500 volts ac. for one minute between motor windings and
frame and at 500 volts d.c. with an insulation test meter when a resis-
tance greater than 20 Megohms must be registered.
Motor Switch:
Double-pole, fitted with a switch click supressor across each pole.
Speed Ranges:
31.9 to 34.6, 43.2 to 46.8 and 75 to 81 rev/min. approximately.
Size:
14 5/8in (371mm) from back to front; 13 3/4in (349mm) wide; 2 in
(51mm) above and 3 15/16 in (100mm) below underside of base plate
Weight:
17 1/2lb (7.9kg)
technical specifications
5
Measured with Gaumont Kalee
Type 1740 meter with 3000c/s
constant frequency record at
331/3, 45 and 78 rev/min
Referring to Diagram 1.
(1) Place a record on the turntable.
(2) Turn the speed selector to the setting appropriate for the
record to be played, or check that this has already been done.
(3) Turn the motor switch control clockwise to start the turntable.
This operation also switches on the indicator lamp.
(4) To set speed accurately, place a record on the turntable and
switch on, as already described. Place pickup on record and
turn the speed adjuster until the stroboscopic markings on the
rim of the turntable, appropriate to the speed for which you
are setting, appear to remain stationary. The lower marking
represents 331/3rev/mm., the centre one 45 rev/mm. and the
upper one 78 rev/mm.
For highly accurate work, it is desirable to let the motor run for
approximately 10 minutes so that it may reach its normal operating
temperature. Speed should always be re-checked after changing the
speed range.
To protect the intermediate wheel, the speed selector is interlocked
with the motor switch and cannot be operated unless the motor is
switched off.
Do not hold the turntable stationary whilst the motor is switched on
and never disconnect the power supply until the motor has been
switched off
operation
6
Motor Switch Speed Adjuster Speed Selector Stroboscopic Markings
Diagram 1
The bearings of the motor, intermediate wheel and turntable spindle are of the
oil-retaining type and rarely need lubrication. When the need for oil becomes
apparent, lift off the turntable and lubricate these bearings sparingly with the oil
supplied. The motor must be switched off before removing the turntable or
replacing it on its spindle. If any difficulty is experienced in removing the
turntable an assistant should give the spindle top a downward tap with a small
piece of wood, such as the handle of a screwdriver, whilst the turntable is being
lifted.
The top bearing of the Motor can be reached through one of the holes in the
aluminium brake disc, see Diagram 2.
The top bearing of the Intermediate Wheel should have one drop of oil only
applied to it.
The bearings of the Turntable Spindle are lubricated by saturating the felt pad
surrounding the spindle and by removing the screw from the top of the housing
to apply a few drops of oil through the hole then revealed.
After lubrication, it is essential to remove every trace of oil from the motor pulley,
intermediate wheel and the inside of the turntable rim.
Further points for periodical attention are the periphery of the intermediate wheel
which must be kept clean by wiping it with a clean, dry cloth, the lever pivots on
the underside of the base plate which should be lightly oiled and the sliding sur-
faces which should be smeared with a light grease.
maintenance
7
Diagram 2
The Model 401 has been designed to give reliable service over long
periods of use. These instructions have been included to enable you
to make the few minor adjustments which may become necessary
after a prolonged period.
Turntable Speed
When set to 331/3rev/min. with the pointer of the speed adjuster
central, the lower stroboscopic turntable markings should appear to
remain stationary when viewed in the light of the neon lamp. If this is
not the case, remove the turntable, insert a suitable screwdriver
through the small hole in the base plate and turn the speed adjust-
ment screw C on Diagram 3, slightly clockwise if the speed is high
and counterclockwise if it is low. Having made this adjustment, the
other two speeds should also be correct within close limits.
If the speed adjuster does not enable the correct speed to be set
check that the position of the intermediate wheel is that specified
under the heading 'Intermediate Wheel'. Should this be satisfactory
and turntable speed is too high, slacken the large nut on the under-
side of the lug attached to the motor casting and which locks the
magnet carrier pivot. Then, inserting a screwdriver into the slot at the
lower end of the pivot A, situated on the left of the screw mentioned
in the previous paragraph, turn the pivot a fraction of a turn in a coun-
terclockwise direction. If the speed is too low turn the pivot in a clock-
wise direction. Always re-tighten the nut after making an adjustment.
If, when using the speed adjuster control, there is difficulty in obtain-
ing 'fast' turntable speed, an alternative motor pulley, identified by a
red spot, is available to increase 'fast' speed range.
adjustments
8
diagram 3
Intermediate Wheel
The height of this rubber-tyred wheel in relation to the motor pulley
should be such that there is about 1/32 in (1 mm) clearance between
the tyre and an adjacent pulley step at any speed setting. If there is
not, slacken the three screws at the top of the motor pulley B and
raise or lower the pulley before re-tightening the screws equally.
Turntable Brake
This will bring the turntable to rest within 2 or 3 revolutions of switch-
ing off. If it continues to turn for a longer period slacken both screws
holding the brake pad lever E, on the underside of the base plate,
move the lever outwards slightly, then re-tighten the screws. The
action of the switch will be impeded if the brake is set too far out.
Power Supply Voltage Range
If this is altered, say from 220/250 volts to 110/125 volts, the two fol-
lowing adjustments will be required.
(1) After disconnecting the power supply and removing the volt
age changeover and connecting block cover, alter the posi-
tions of the wire links in accordance with Diagram 4.
(2) With the supply still disconnected, remove the neon lamp
below cover D, as instructed in the Installation section, and fit
a suitable replacement which is available from our Spares
Department. The reference numbers of both lamps are shown
in the spares list at the end of this manual.
adjustments
9
diagram 4
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