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Summary of Contents for Shure Power Master PM300 SERIES
- Page 1 PM300 SERIES OPERATING AND SERVICE MANUAL Manufactured by SHURE BROTHERS INC. 222 Hartrey Avenue Evanston, Illinois 60204 U.S.A. Copyright 1978, Shure Brothers Inc. Printed in U.S.A. AL 407 (RE) 27A822...
- Page 3 P M 3 0 0 S E R I E S S P E C I F I C A T I O N S Amplifier Type ........All silicon transistor power amplifier Power Output .
- Page 4 F I G U R E 1 . FIGURE 2.
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Page 5: Operating Instructions
EQUIPMENT DESIGNED FOR USE WITH THE PM300 DESCRIPTION SERIES POWER MASTER AMPLIFIERS The Shure Power Master is a solid state booster power Vocal Master Console VA300-C amplifier capable of delivering 100 watts RMS to an 8-ohm Vocal Master Console VA302-C load. - Page 6 Power Master frequency range, distortion-free reproduction, and enough sound power to fully penetrate the audience area. The Shure VA300-S Speaker Column has been designed PM300 Power Requirements: to provide all of these features. It is recommended that The PM300 Power Master is furnished with a three con- VA300-S Speaker Columns be used in pairs, each column ductor power cable and three-prong plug.
- Page 7 Refer servicing to qualified service personnel. able. To maintain the highest possible performance and reliability, Shure factory replacement parts should be used. Replacement Parts: When ordering replacement parts, specify the Shure Re-...
- Page 8 Before removing these original transistors. Shure transistors are coded transistors, write down the lead color and location at each either by a color dot or a letter stamped on the top transistor solder junction.
- Page 9 If all conditions in the above table are met, the tran- Diodes: sistor may be considered free of any gross defect; if any Diodes D5 and D6, see Figure 5, Page 6, are located on of the following conditions are not met, the transistor the black finned sinks with the output transistors.
- Page 10 To maintain the highest possible performance and reliability, Shure Factory Replacement Parts should be used. *When ordering 86A332 or 86B332, specify current gain code. See page 6.
- Page 11 6. Volume control set to maximum. 7. AC voltage measurements may vary ±20% from the values shown. Shure part numbers are not shown in the Parts List, ac- companying the circuit diagram, if parts are readily avail- able through local electronic parts supply distributors. In these instances, the circuit diagram will show the values of the standard parts.
- Page 12 PM300E POWER SUPPLY CIRCUIT DIAGRAM FIGURE 8. PM300E6 POWER SUPPLY CIRCUIT DIAGRAM FIGURE 9.
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