Marantz 3800 - Page 18

EQUIPMENT ITEM
Distortion Analyzer
AC Voltmeter
Audio Oscillator
Oscilloscope
Variable Autotransformer
(0-140 VAC)
AC Wattmeter 0-150 W
Line Voltmeter
0-150 V AC
AC Power Control Box
(optional)
Shorting Plug (4)
Noise Filter (20 Hz to 20
KHz, 12 dB per-octave
rolloff, tess than 3 micro-
volts residual noise input)
MANUFACTURER AND MODEL NO.
OR EQUIVALENT
Sound Technology Model 1700A or Hewlett
Packard Model 331A or 333A
Hewlett Packard Model 400F
Sound Technology Model 1400A
Tektronix Model T-932 or T-935
Simpson Model 312, 313, or 314
Fluke Model 8000 (Digital)
Powerstat Model 116B,
Superior Electric Company
Simpson Model 1379 (Catalog No. 10970)
Simpson Model 1359 (Catalog No. 10320)
Fabricated as shown in Figure 2-1
Phono plug with 600 ohm resistor across
center pin and shell
Commerical grade
Measure total harmonic distor-
tion of preamp
Measure preamp output voltage
Audio signal source
Waveform analysis and trouble-
shooting
Voltage and resistance
measurements
Controls A.C. line voltage to
preamp
Monitor preamp power con-
sumption
Monitor A.C. line voltage to
preamp
Monitor line voltage and power
consumption
Short preamp input to eliminate
noise pickup
Measure noise.
Table 2-1 Recommended Test Equipment
C. POWER CONSUMPTION VERIFICATION
(1)
(2)
(3)
Plug Model 3800 AC Plug into AC Con-
trol Box outlet.
Set LINE Switch (AC Power Control
Box) to VARIABLE.
Observing Wattmeter, slowly rotate auto-
transformer control cw to 120 VAC. If
Wattmeter indicates more than 5 W at
any time, (or fails to indicate at all), srnut
off AC power and refer to the Trouble
Analysis section.
D. FUNCTLONAL TESTS
Perform functional tests on unit to estadf ish
the operation of all inputs, outputs and con-
trols as specified. Reset Model 3800 conrols
2-3