Service Procedures; Reference Material; Changing The Voltage - Shure AMS8100 Service Manual

Microphone mixer

Hide thumbs Also See for AMS8100:

Table of Contents

25A1041 (RA)

Shure AMS8100 Automatic Microphone Mixer

Refer to the Service Equipment Manual for standard test equipment.

The AMS8100 can be internally modified to operate from either

120 Vac or 230 Vac power. Follow these steps to change the

operating voltage:

1. Disconnect the unit from the ac power source.

2. Remove the eight Phillips head screws to remove the top cover.

3. Locate voltage selector switch SW903 adjacent to the power

transformer (T901).

4. Use a screwdriver to turn the center rotor to the 230 V position

for 230 V operation, or to the 120 V position for 120 V operation.

5. Locate fuse F901 and remove it.

6. Replace fuse F901 with a 100 mA, 250 V, time-delay fuse for

230 V operation, or a 200 mA, 250 V, slow-blow fuse for 120 V

operation.

7. If changing to 230 V operation, replace the power cord with a

cord rated for 230 V operation (an IEC appliance connector on

the equipment end and a CEE 7/7 Schuko mains connector on

the other end).*

8. If changing to 120 V operation, replace the power cord with a

cord rated for 120 V operation (an IEC appliance connector on

the equipment end and a mains connector suitable for 120 V

operation on the other end).*

*For systems that require other mains connectors, obtain a power

cord with an IEC 320 type mating connector for connection to the

unit, and an appropriate plug on the other end for connection to the

mains.

Products

Service Procedures

Table of Contents

Service Procedures