Shure R50 User Guide

REPLACEMENT DYNAMIC CARTRIDGE

METAL STRIP

Model R50 User Guide

The Model R50 is a direct cartridge replacement for the

following microphone models:

540, 540S, and 540SH
550S
560
561
574SA, 574SB
575S, 575SB
579SB

Included with the dynamic cartridge are a rubber gasket and
a metal strip.

INSTALLATION AND CONNECTIONS

Use the following instructions to replace the dynamic
cartridge. Be sure to refer to the proper model number.

NOTE: Do not solder leads to taped areas of terminal
board.

Models 540, 540S, and 540SH Microphones

1. Holding microphone in vertical position, unscrew (turn
counterclockwise) and remove microphone grille-cap
assembly, perforated aluminum plate, and steel spacer.

2. Gently remove cartridge with rubber gasket from case.

3. Disconnect leads from old cartridge.

4. Wrap metal strip around new rubber gasket (See Figure 1).
Install new rubber gasket on new cartridge and connect
leads to replacement cartridge. Microphone case must
connect to cartridge frame through metal strip. Note lead
color and terminal coding as in Figure 1.

MICROPHONE

CASE

STEEL ADAPTER WASHER

YELLOW

(TO ”+” TERMINAL)

GREEN

CARTRIDGE

RUBBER GASKET

MODELS 540, 540S AND 540SH

FIGURE 1

GRILLE-CAP
ASSEMBLY

ALUMINUM PLATE

5. Assemble cartridge into case making sure it is properly
seated in steel adapter washer.

6. Reassemble steel spacer, aluminum plate, and cap­grille assembly. Make sure cap is tightened securely.

©2005, Shure Incorporated

27C605 (Rev. 5)

Printed in U.S.A.

Models 574SA, 574SB, 575S, and 575SB Microphones

1. Hold case of microphone firmly and remove microphone
cap-grille assembly by pulling hard to separate cap from
case. See Figure 2 for 574SA, Figure 3 for 574SB,
Figure 4 for 575S, and Figure 5 for 575SB.

2. Remove foam bushing if it did not come off with cap.

3. Gently remove cartridge with rubber gasket from case.

4. Disconnect leads from old cartridge.

5. For 574SB and 575SB install new rubber gasket on new
cartridge and connect leads to replacement cartridge.
Note lead color and terminal coding in Figure 3 for
574SB, and Figure 5 for 575SB.

6. For 574SA and 575S (when original cartridge contains
metal strip), wrap metal strip around new rubber gasket
(see Figures 2 and 4).

NOTE: Certain Model 575S microphones do not contain
metal strips; if none is present on original cartridge, discard
metal strip supplied with new cartridge. Install new rubber
gasket on new cartridge and connect leads. Internal shield
of microphone must connect to cartridge frame through
metal strip (when metal strip is used). Note lead color and
terminal coding as in Figures 2 and 4.

7. Assemble cartridge into case, making sure it is properly
seated. Reassemble foam bushing and cap-grille assem­bly to microphone case. Make sure cap is securely seated
and held by internal snap ring.

WHITE

(TO ”+” TERMINAL)

RED

(TO ”+” TERMINAL)

RUBBER GASKET

FOAM BUSHING

BLACK

MICROPHONE CASE

SNAP RING

GREEN

(TO ”+” TERMINAL)

MICROPHONE

CASE

SNAP RING

WHITE

(TO ”+” TERMINAL)

CARTRIDGE

MODEL 574SB

CARTRIDGE

RED (TO ”+” TERMINAL)

FIGURE 3

YELLOW

WHITE

MODEL 575S

FIGURE 4

WHITE

RUBBER GASKET

FOAM BUSHING

GRILLE-CAP
ASSEMBLY

RUBBER GASKET

FOAM BUSHING

GRILLE-CAP
ASSEMBLY

METAL
STRIP
(SEE STEP 6)

RUBBER GASKET

MICROPHONE

CASE

SNAP RING

CARTRIDGE

SHIELD

BLACK

MODEL 574SA

FIGURE 2

GRILLE-CAP

ASSEMBLY

RED

(TO ”+” TERMINAL)

MICROPHONE
CASE

SNAP RING

FOAM BUSHING

CARTRIDGE

SHIELD

GRILLE-CAP

ASSEMBLY

BLACK

MODEL 575SB

FIGURE 5

2

Model 560 Microphones

1. Hold case of microphone firmly and remove grille-cap
assembly by pulling hard to separate cap from case.

2. Remove foam bushings, aluminum plate, and aluminum
washer. See Figure 6. (These parts may remain in cap.
If so, leave parts in cap.)

3. Remove cartridge from rubber gasket by peeling back
edge of rubber gasket. DO NOT remove rubber gasket
from case.

4. Disconnect leads from old cartridge.

5. Connect leads to new cartridge. Note lead color and ter­minal coding in Figure 6.

6. Seat cartridge into rubber gasket. Reassemble alumi­num washer, aluminum plate, foam bushings, and grille­cap assembly to microphone case. Make sure cap is
securely seated and held by internal snap ring.

Model 561 Microphones

1. Turn 4-40 set screw (clockwise) with Allen wrench and then
remove microphone grille-cap assembly. (See Figure 7.)

2. Remove foam bushings, aluminum plate, and aluminum
washer. (These parts may remain in cap. If so, leave
parts in cap.)

3. Disconnect leads from old cartridge.

4. Install new rubber gasket on new cartridge and connect
leads. Note lead color and terminal coding in Figure 7.

5. Assemble cartridge into case and reassemble alumi­num washer, aluminum plate, foam bushings, and grille­cap assembly to microphone.

6. Align hole in cap with Allen set screw and tighten screw
with Allen wrench by turning screw OUT (counterclock­wise).

MICROPHONE
CASE

SNAP

RING

RUBBER
GASKET

ALUMINUM WASHER

CARTRIDGE

BLACK

BLUE

RED (TO ”+” TERMINAL)

MODEL 560

FIGURE 6

ALUMINUM PLATE

FOAM BUSHINGS

GRILLE-CAP

ASSEMBLY

MICROPHONE

CASE

4–40 ALLEN

SET SCREW

SCREWED IN CLOCKWISE

TO REMOVE GRILLE–CAP

ASSEMBLY

ALUMINUM WASHER

RUBBER GASKET
CARTRIDGE

BLUE

BLACK

WHITE (TO ”+” TERMINAL)

MODEL 561

FIGURE 7

ALUMINUM PLATE

FOAM BUSHINGS

GRILLE-CAP
ASSEMBLY

3

Model 550S Microphones

A

1. Holding microphone in vertical position, unscrew (turn
counterclockwise) and remove microphone grille-retainer
assembly, pad, resonator, and spacer. See Figure 8.

2. Gently remove cartridge from case.

3. Disconnect leads from old cartridge.

Model 579SB Microphones

1. Holding microphone in vertical position, unscrew (turn
counterclockwise) and remove screen assembly and
washer.

2. Gently remove cartridge from handle assembly.

3. Disconnect leads from old cartridge.

YELLOW

TO ”+” TERMINAL

MICROPHONE CASE

FOAM BUSHING

WASHER

GREEN

RUBBER

GASKET

CARTRIDGE

SPACER

RETAINER

GRILLE

PAD

RESONATOR

MODEL 550S

FIGURE 8

4. Install new rubber gasket on new cartridge and connect
leads. Note lead color and terminal coding as in Figure 8.

5. Assemble cartridge into case making sure it is properly
seated in foam bushing and washers.

6. Reassembly spacer, resonator, pad, and grille-retainer
assembly. Make sure retainer is tightened securely.

SCREEN

SSEMBLY

CARTRIDGE

WASHER

RUBBER

GASKET

YELLOW

BLUE

(CENTER

STRIP)

FOAM
BUSHING

GREEN
(TO ”+” TERMINAL)

HANDLE
ASSEMBLY

MODEL 579SB

FIGURE 9

4. Install new rubber gasket on new cartridge and connect
leads. Note leads color and terminal coding as in Figure 9.

5. Assemble cartridge into handle assembly making sure
foam bushing and cartridge are properly seated.

6. Reassemble washer and screen assembly, making cer­tain screen assembly is tightened securely.

SHURE Incorporated http://www.shure.com
United States, Canada, Latin America, Caribbean:
5800 W. Touhy Avenue, Niles, IL 60714-4608, U.S.A.
Phone: [phone] U.S. Fax: [phone] Intl Fax: [phone]
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Shure Europe GmbH, Phone: [phone] Fax: [phone]
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Shure Asia Limited, Phone: [phone] Fax: [phone]

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