Shure R98B User manual

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R98B -- Model R98B Replacement Cartridge for Model 577 Series Microphones
Disassembly
EXPLODED VIEW
Remove the three No. 6 Phillips head screws securing the case assembly. Separate the case halves, remove the
switch button, and remove the case front from the chassis module.
Model R98B Cartridge
The R98B is a replacement microphone cartridge for the 577B microphone. To replace the present cartridge with
the R98:
1. Disassemble the case as described above.
2. Using a low-wattage (50 W or less) soldering iron, unsolder the leads connected to the present cartridge.
3. Bend the two cartridge-retaining tabs inward (toward cartridge).

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4. Slide the cartridge out of the chassis module, remove the retaining ring from around the screen, and remove
the O-ring from the rear of the cartridge.
5. Place the retaining ring and the O-ring on the replacement cartridge and slide the replacement cartridge into
the chassis module.
6. Bend the cartridge-retaining tabs outward (away from cartridge).
7. Solder the leads to the cartridge terminals. See Figure 2 for proper lead connections.
8. Insert chassis module in case front and switch button in case back.
9. Fasten case halves with previously removed screws.
INTERNAL WIRING DIAGRAM