Tektronix 442, Instruction Manual

Page: 17 / 170

Operating Instructions— 442 Service
NORTH AMERICAN
120 VOLT/60 Hz
RATED 15 AMPERE
(12 AMP MAX.; NEC)
UNIVERSAL EURO
220 VOLT/50 Hz
RATED 16 AMPERE
240 VOLT/60 Hz
RATED 15 AMPERE
(12 AMP MAX.; NEC)
U.K.
240 VOLT/50 Hz
RATED 13 AMPERE
AUSTRALIAN
240 VOLT/50 Hz
RATED 10 AMPERE
( 2 3 8 9 - 7 6 ) 2 7 5 7 - 6 6
AC LINE VOLTAGE HI/LO
SELECTION (120 V/240 V) /
\
/
Figure 2-2. Power switch locations on bottom of the 442.
Table 2-2
AC REGULATING RANGES
HI/LO
Switch
Position
120 V/240 V Setting
120 V 240 V
HI
110 to 132 V rms
220 to 250 V rms
LO 92 to 110 V rms 202 to 240 V rms
Fuse Information
The 442 power input fuse is located in a fuse holder on
the back panel of the 442. See Figure 2-3.
Figure 2-1. Commonly used power plugs.
Set the AC Line Voltage Selection syvitchtothe nominal
line voltage available (see Table 2-2). The fuse value must
be changed when a different Line Voltage range is
selected (see Table 2-3).
Setthe HI/LO Regulating Range switch (see Figure 2-2)
so the expected line-voltage fluctuations remain within
the range selected (see Table 2-2).
Table 2-3
POWER INPUT FUSE VALUES
Applied Voltage
F700 Value
120 V ac 0.75 A Fast Blow
240 V ac 0.30 A Slow Blow
2 -2
REV A MAY 1980