Test Equipment Required For Servicing; Voltage Conversion - Marantz 74 PM52/00B Service Manual

7. TEST EQUIPMENT REQUIRED FOR SERVICING <
This table lists the test equipment required for servicing the Model PM-55 Stereo Amplifier.
-Distortion measurements
Distortion Analyzer
ACVTVM Voltage measurements (AC) ,
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Oscilloscope Waveform analysis.and trouble shooting and ASO aignment
Circuit Tester Trouble shooting . é
DCVTVM Voltage measurements (DC)
AC Wattmeter Monitors primary power to amplifier
Line Voltmeter Monitors potential of primary power to amplifier
Variable Autotransformer Adjust level of primery power to amplifier
Shorting Plug Shorts amplifier input to eliminate noise pickup
8. VOLTAGE CONVERSION
@ EUROPEAN MODEL ONLY ;
To convert the unit to a different power source voltage,
change the position as illustrated in the drawing below.
VOLTAGE SELECTOR
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CAUTION
| DISCONNECT POWER SUPPLY CORD FROM AC
OUTLET BEFORE CONVERTING VOLTAGE.
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