Garrard SP 25 Mk1 SP 25 Mk2 Service Manual

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Model SP. 25 Single Record
Playing Unit

(with SP.25 Mk II supplement)

ENGINEERS SERVICE MANUAL
AND
SPARE PARTS LIST

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Introduction

The Garrard SP.25 is a high quality single record playing
unit, elegantly styled and incorporating many practical
features. The pick-up arm, of the modern, tubular type, has
ball-bearing pivots. A cue and pause device is fitted so that
the arm can be positioned over the record before play, and
gently lowered by the pickup arm control. The pickup arm
returns automatically to its rest after play These refine-
ments, together with the pickup lifting feature, considerably
reduce the risk of accidental damage to record or stylus
through mishandling. In addition, the large turntable, foam-
damped suspension springs, pickup arm bias compensator
and plug-in pickup head, reflect the attention to detail
and quality built into this unit. It is made as a dual voltage

range model, suitable for too/r30 and 200/250 volts arc.
and as a low voltage range model, suitable for too/13o volts

Contents
Page
Operation . . . . , . . . 3
Maintenance 3
Adjustments 4
Installation 5

am. The dual voltage range model is fitted with a voltage
changeover block. These units are suitable for two power
supply frequencies depending on the motor pulley fitted.
Both pulleys may be coloured for easy identification: Nickel
for 50 and Brass for 60 Hz. supplies. On later units identifi-
cation may be by means of the size of the pulley base: pulley
base diameter smaller than the 78 revs/min step for so Hz,
larger for 60 Hz.

Should you require any further information or advice not
covered by this Manual, our Technical Service Department
will be pleased to help. For spare parts and service returns
contact our Service and Spares Department. Address:
Garrard, Kembrey Street, Swindon, Wilts. Tel: Swindon
(0793) 6211; or in other countries your Garrard Agent.

Cue and Pause Mechanism 6
Fault Chart . i, ,. 7
Spare Parts List . . 13
SP.25 Mk II Supplement 16

PAGE x

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FAULT

CAUSE

CORRECTION

TURNTABLE SPEED

Speed varies erratically.

Oil on driving surface.

. Motor pulley (r6) loose or

height incorrect.

. Motor shaft tight.

Remove turntable and clean all driving surfaces (see Main-
tenance).

Check that grub screws are tight. See Turntable runs
excessively fast or slow, Cause 4.

If the motor shaft is tight in its bearings, it will not turn
freely when spun with the fingers. This condition may be
caused by using heavy lubricating oil, or by mis-aligned
motor bearings. See Motor runs slowly, Causes I and 2,
for correction.

Speed varies consistently
(Wow and Flutter).

Tight turntable spindle.

Dirt on inside of turntable
rim.

Loose motor pulley (16).
Flats on intermediate
wheel (t7).

. Bent shaft or unbalanced

rotor.

Revolve turntable by hand without engaging trip mechan-
ism. If it does not turn freely remove turntable (see Main-
tenance) and wipe its bearing and spindle with clean
cloth. Oil spindle and ball race (21) with light, machine oil.
Remove surplus oil.

Remove turntable (see Maintenance) and clean inside
turntable rim with clean cloth.

See Speed varies erratically", Cause 2.

Slight flats can often be removed by running the unit con-
tinuously for a few hours. If this does not suffice, replace
intermediate wheel. To avoid flats on the intermediate wheel
always switch 06 by means of the operating control.
Should the motor shaft with pulley removed (if the remov-
able type) be more than .0005 out of truth or the motor
vibrate badly, the rotor and shaft assembly should be re-
placed. The rotor and shaft are integral and no attempt
should be made to separate them.

Turntable does not revolve
when motor is running.

5

. Oil on driving surfaces.

Intermediate wheel ten-
sion spring not function-
ing.

. Intermediate wheel sup-

port bracket (18) not free.

Remove turntable and clean all driving surfaces (see Main-
tenance").

Check that the spring attached to the end of lever (is) is
still in place. Move the Control to Manual and watch to
make sure that the spring goes into tension. If not, it means
that the spring has stretched and should be replaced

Check that this bracket is free to move in the slot in the unit
plate. The intermediate wheel (r7) should engage motor
pulley firmly on switching the Control to Play and retract
freely when switching to Off. If bracket (18) is tight, check
speed change mechanism underneath unit plate. Look for
damage to mechanism and lubricate the intermediate wheel
support spindle and speed change spindle with light,
machine oil.

Turntable
fast or slow.

runs excessively

Voltage range of motor set
incorrectly.

Incorrect motor pulley
(I 6).

Tight intermediate wheel
(17) bearing.

Motor pulley (16), or inter-
mediate wheel height in-
correct.

Disconnect power supply and examine connections. Check
that specification on motor corresponds to that of the power
supply. If dual voltage range model, check changeover block
connections against instructions on its cover. Make sure
links in block are tight and making good contact.

Remove turntable (see Maintenance) and check pulley
coding, see reference in Introduction secrion, page r. If
incorrect, replace it. When ordering, quote SP.25 and
frequency of power supply.

Spin intermediate wheel when disengaged from motor pul-
ley to see if it runs freely. If it does not, remove it, clean its
spindle and bearing, then lubricate with light, machine oil
and reassemble.

See Adjustments".

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