608 Instruction
SERVICE SAFETY INFORMATION
FOR QUALIFIED SERVICE PERSONNEL ONLY
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 g iven previously.
WARNING
DO N OT S E RV I C E ALO N E
Do not attempt internal service or adjustment of this instrument unless another person, capable of rendering first
aid and resuscitation, is present.
AC POW E R S O U R CE A N D C O N N E CTI O N
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.
EX E R C I S E CAR E W H E N O P ERATI N G I N STR U M E NT W IT H O UT C O V E R S
Dangerous potentials exist at several points throughout this instrument. When the instrument is operated without
protective covers, do not touch exposed connections or components.
D I S CO N N E CT I N STR U M E NT P O W E R
To avoid electric shock, disconnect the Monitor from the power source before removing protective panels,
soldering, or replacing components.
CRT H A N DLI N G
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 fa ceplate.
S I LI C O N E G R EA S E H A N D L I N G
Handle silicone grease with care. A void getting the silicone grease in your eyes. Wash hands thoroughly after use.
A PPLY P R O P E R LI N E VO LTAG E
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.
AVO I D EXC ES S I V E M O I STU R E
Circuit boards and components must b e dry before applying power to prevent damage from electrical arcing.
EX E R C I S E CAR E W H E N CH E CK I N G D I O D E S
When checking diodes, do not use an ohmmeter scale that has a high internal current, since high currents may
damage the diodes under test.
U S E PHO P E R CLEAN I N G A G E NTS
A void 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.
REV A, SEP 1980
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