Service manual

WARNING
USING AUTOTRANSFORMERS. If the mainframe is to be
energized via an autotransformer (for voltage reduction) make
sure the common terminal is connected to neutral (that is, the
grounded side of the main’s supply).
CAPACITOR VOLTAGES. Capacitors inside the mainframe may
remain charged even when the mainframe has been
disconnected from its source of supply.
USE PROPER FUSES. For continued protection against fire
hazard, replace the line fuses only with fuses of the same
current rating and type (such as normal blow, time delay, etc.).
Do not use repaired fuses or short-circuited fuseholders.
WIRING INSULATION. To prevent electrical shock, all wires to
the channel connections must be insulated to at least 120 V rms
(170 V peak).
Cautions This section contains CAUTIONS which must be followed to avoid
damage to the equipment when performing instrument maintenance or
repair.
CAUTION
MAXIMUM VOLTAGE/CURRENT. The maximum voltage that may
be applied between High (H), Low (L), and Guard (G) terminals is 120
V dc or 120 V rms (170 V peak). The maximum current is 50 mA
(non-inductive) per channel. The maximum power per channel is 1 VA.
STATIC ELECTRICITY. Static electricity is a major cause of
component failure. To prevent damage to the electrical components in
the multiplexers, observe anti-static techniques whenever working on a
multiplexer.
1-3 General Information