
N.B.. The power supply should be disconnected for all servicing except volt age check. Numbers in brackets correspond to those on Diagrams 9 and 10.
Fault
Cause
Action
Turntable fails to re-
1. No power supply reaching motor.
Check supply with voltmeter. If correct,
volve.
check action of motor switch (52), tightness
of wire links (40) and all connections.
2. Discontinuity of motor coil winding(s).
Check resistance with ohm-meter. Connected for
220/250 volts, reading should be approximately 400
ohms and for 110/125 volts, approximately 100 ohms.
Replace coil(s) if necessary.
3. Intermediate wheel tension spring (15)
Replace or re-secure spring.
stretched or detached.
Turntable speed too fast
1. Incorrect motor pulley (14) for power
Check pulley's identification: partially nickel
or slow for correction
supply frequency.
plated 50 c/s, brass 60 c/s. Replace if necesary
by speed control
2. Wire links (40) set incorrectly for power
Check against diagram on cover of change-over
supply voltage.
block or Diagram 4
Turntable speed varies
1. Driving surfaces of motor pulley (14),
Wipe surfaces with a clean dry cloth.
with audible effect.
intermediate wheel (16) and/or turntable
(Wow or Flutter)
contaminated with lubricant.
2. Intermediate wheel (16) height incorrect.
See 'Adjustments' page 8.
3. Loose nut on magnet carrier (10).
Tighten nut.
Rumbling sound
1. Power supply lead too heavy or pulled
Replace or re-route lead.
through speaker(s).
tight.
2. Intermediate wheel (16) height incorrect.
See 'Adjustments' page 8.
3. Motor transit screws (48) not released.
Release screws. See Installation, page 11.
service chart
14
Summary of Contents for 401
Page 1: ......
Page 4: ...3 THE GARRARD MODEL 401 TRANSCRIPTION TURNTABLE...
Page 13: ...installation 12...
Page 14: ...installation 13...
Page 16: ...spare parts 1 23 15...
Page 17: ...spare parts 24 60 16...