Tektronix PHASER 840 Service Manual page 3

Symbols as marked on product:
DANGER high voltage:
Protective ground (earth) terminal:
Use caution. Refer to the manual(s) for information:
!
WARNING:
If the product loses the ground connection, usage of knobs and
controls (and other conductive parts) can cause an electrical shock. Electrical
product may be hazardous if misused.
Service safety summary
For qualified service personnel only: Refer also to the preceding Users Safety
Summary.
Do not service alone:
Do not perform internal service or adjustment of this product
unless another person capable of rendering first aid or resuscitation is present.
Use care when servicing with power on:
Dangerous voltages may exist at several
points in this product. To avoid personal injury, do not touch exposed
connections and components while power is on.
Disconnect power before removing the power supply shield, soldering, or
replacing components.
Do not wear jewelry:
Remove jewelry prior to servicing. Rings, necklaces, and
other metallic objects could come into contact with dangerous voltages and
currents.
Power source:
This product is intended to operate from a power source that will
not apply more than 250 volts rms between the supply conductors or between
either supply conductor and ground. A protective ground connection by way of
the grounding conductor in the power cord is essential for safe operation.