Shure m 91 ed owners manual

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:22 HAITREY AVE.. :VANSTON. IL. 6020-4 U.S.A.

H S H L.) I: E murmurs urn ELECTRONIC COMPONENTS
®

ARIA CODE 3l21320-9000 O CABLE: SHURIMICRO

THE PREMIER FAMILY OF STEREO SOUND REPRODUCERS

D STEREO DYNETICL
MODEL M915 PHONOGRAPH CARTRIDGE

CARTRIDGE AND STYLI SPECIFICATIONS

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5': 59 /§° I
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'3 s Q *" -\ tr} .\\
6: 9 $5? 52?" $ *9 $3 -~°"-' e
so see ems gs :3 «so an? 4*
Q3"? 9s? 60; 9 sbe" 69 o é «6 re

N91ED Yellow 5.0 luv 20 to within 25 dB 335 to 400 ll: - 22 cm/src
5 X 18;; 20.000 2 dB at 1V; 1.000 It: - 33 cut/sec
(.0002 X It: 1 lrllz grams 10.000 Hz - 19 cat/sec
. 007 in.) at 1 grant
Biradial
(Elliptical)
N91-3t Dark 6.2 «N 20 to - - 1V3 -
64 microns Green 20.000 to
(.0025 in.) Hz grams
Spherical -

fOptional 78 rpm Stylus: Set amplifier to "MONO" or "A-I-B."

'()utput voltages given for stereo cut record. For MONO cut record.
output voltage at both left channel and right channel cartridge terminals
will be 71% ot' Iigures above.

Tracking forces greater than maximum indicated should not be used.
NET WEIGHT: 5.5 grams

INDUCTANCE: 720 millihenries

DC RESISTANCE: 630 ohms

OPTIMUM LOAD: 47,000 ohms resistance in parallel With 400 to 500 pico-
iarads total capacitance per channel. Load resistance can be up to 70.000
ohms with almost no audible change in frequency response. Total capaci-
tance includes both the tone arm wiring and amplifier input circurt.

FOUR-CHANNEL: This Stereo DyneticCID cartridge is compatible with all
Iour-channel matrix systems.

MONOPHONIC OPERATION: Set I'unction switch on amplifier to "MONO"
or "A413." lt' amplifier is not «nuipped with this switch, connect lelt and
right channels in parallel.

CONNECTIONS (300 Figure 1): Right hot" lead (usually red) to R" right
ground (usually green) to "RC." tell "hot" lead (usually white) to "L." let't
ground (usually blue) to "LG." ll metal head is causing ground loop hunt,
remove the ground tab. The metallic cartridge shield is disconnected from
the right channel ground by the removal of the ground tab.

CAUTION: Do not make solder

. . . rt 41"»!
conneclion to cartridge terminals. 22,... ,_ - 5.7;...
ltkvrar ~ . .- . . ' was:
STYLUS REPLACEMENT (soc Flg- a 1 gaze-.1 tars
mo 2): Grasp molded housing ot I! 11: : ' .. ,.-
o - - 1 T~---- Cur-at
stylus and gently pull Iomarrl out am "i kg - 0&st:
ol cartridge. Insert replaCement pawn w-J ttwuzz
slvlu inln mrlrel and mess until ff-g ,3, «'5

ltousn- mates with cartrid 'c Law.
I b 5 FIGURE 1

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MOUNTING [12.7 mm (1/2 In.)
mounting centers]:

Mounting screws are provided.

1. Remove stylus guard and stylus
(see Stylus Replacement).

2. Connect leads to cartridge (see
Figure 1).

3. Lay cartridge in shell and align
mounting holes on side of car-
tridge with holes or threads in
shell. Follow turntable manu-
facturer's instructions to mount
cartridge in tone arm or plug-in
shell.

4. Reinsert stylus (see Stylus Re-
placement). FIGURE 2

RECOMMENDED STYLUS CLEANING: Use a camel's hair brush (No. 2 size
or smaller), trimmed to approximately 6 mm (1/4 in,), dipped in alcohol or
an alcohol-distilled water solution. Commercial cleaning solutions may cause
stylus damage or corrosion. Always brush stylus from back to front; never
brush or wipe stylus from front to back or side to side.

TO PRESERVE STYLUS LIFE:

1. Follow turntable or lone arm instructions when adjusting antiskating
force.

2. Do not handle the tone arm while it is in operation since this may
cause the arm to sweep across the record.

3. lt it is necessary to manually place the tone arm in the record groove
while turntable is rotating, release it as soon as the stylus engages the
reCord groove.

4. Correct improper set-down adjustment or malfunction of the turntable
changing mechanism to prevent the stylus from striking the edge of the
turntable or record. Do not stack more records than turntable manufac-
turer recommends.

5. Take care to properly insert the stylus into the cartridge assembly and
the cartridge and shell assembly into the tone arm receptacle.

6. Use proper vertical tracking iorce setting for each cartridge.

1. [)0 not use badly warped, cracked or impertecl records.

8. When dusting the turntable protect the stylus with the stylus guard.

SPECIAL NOTE: To maintain the original perlormance standards of your
cartridge. be certain that any replacement stylus you buy hears the follow-
ing certification on the package: "This Stereo Dynetic® stylus is precision
manufactured by Shure Brothers Inc." AVOID INFERIOR IMITATIONS. THEY
WILL SERIOUSLY DEGRADE THE PERFORMANCE OF YOUR CARTRIDGE.
All. GENUINE DYNETIC®" STYU ARE MANUFACTURED BY Sl-lURE
BROTHERS INC. LOOK FOR THE NAME SHURE ON THE STYIUS GRIP.
For more tnlormation on your Shure stylus, write tor booklet: "A Visit to
the Small World at a Stylus.

GUARANTEE: This Shure product is guaranteed in normal use to lie free
trom electrical and mechanical detects tor a puriutl ut' one year lrom the
date of purchase. Please retain prool of purchase date. This guarantee i:.-
cludes all parts and labor. This guarantee does not include stylus wear.

SHIPPING INSTRUCTIONS: Carefully repack the unit and return it pre-
paid to the factory. it outside the United States, return the unit to your
dealer or Authorized Shure Service Center for repair. The unit will be
returned to you prepaid.

PATENT NOTICE: Cartridge and stylus manufactured under one or more
of the t'ollowing U.S. patents: 3,055,988, 3,077,521. 3,077,522. and 3,463,889.

Copyright 1973. Shure Brothers Inc.
27A1074 (OJ) Printed in U.S.A.