Tektronix 608 monitor Instruction Manual page 7

SERVICE SAFETY INFORMATION
The following are safety precautions which appear in the servicing information sections of this manual. This
Service Safety Information is in addition to the Operators Safety Information given previously.
DO NOT SERVICE ALONE
Do not attempt internal service or adjustment of this instrument unless another person, capable of rendering first
aid and resuscitation, is present.
AC POWER SOURCE AND CONNECTION
This instrument is intended to be operated from a single-phase earth-referenced power source having one current-
carrying conductor (the Neutral Conductor} near earth potential. Operation from power sources where both current-
carrying conductors are live with respect to earth (such as phase-to-phase on a three-wire system} is not recom-
mended, since only the Line conductor has over-current (fuse) protection within the instrument.
EXERCISE CARE WHEN OPERATING INSTRUMENT WITHOUT COVERS
Dangerous potentials exist at several points throughout this instrument. When the instrument is operated without
protective covers, do not touch exposed connections or components.
DISCONNECT INSTRUMENT POWER
To avoid electric shock, disconnect the Monitor from the power source before removing protective panels,
soldering, or replacing components.
CRT HANDLING
" Use care when handling a crt. Breakage of the crt causes a high-velocity scattering of glass fragments (implosion).
Protective clothing and safety glasses should be worn. Avoid striking the crt on any object which might cause it to
crack or implode. When storing a crt, place it in a protective carton or set it face down in a protected location on
a smooth surface with a soft mat under the faceplate.
SILICONE GREASE HANDLING
Handle silicone grease with care. Avoid getting the silicone grease in your eyes. Wash hands thoroughly after use.
APPLY PROPER LINE VOLTAGE
To prevent damage to the instrument, always check the line-voltage information recorded on the rear panel before
applying power to the instrument. Incorrect placement of the line-voltage selector plug may damage the
instrument. Verify correct placement of the line-voltage selector plug.
AVOID EXCESSIVE MOISTURE
Circuit boards and components must be dry before applying power to prevent damage from electrical arcing.
EXERCISE CARE WHEN CHECKING DIODES
When checking diodes, do not use an ohmmeter scale that has a high internal current, since high currents may
damage the diodes under test.
USE PROPER CLEANING AGENTS
Avoid the use of chemical cleaning agents which might damage the plastics used in this instrument. Use a non-
residue type of cleaner, preferably isopropyl alcohol, totally denatured ethyl alcohol, or TP35. Before using any
: other type of cleaner, consult your Tektronix Service Center or representative.
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