SECTION
8
SERVICE
8-1.
INTRODUCTION
8-2.
This
section
contains
circuit descriptions, troubleshooting information, block
diagram,
schematics and com-
ponent locators for the
HP
Model
5334B
Universal Counter.
8-3. SAFETY CONSIDERATIONS
8-4.
Although the
HP
5334B
has been designed in accordance
with
international safety standards, this section
has idormation, cautions,
and
warnine
that must
be.
followed to ensure safe operation and to keep the instru-
ment
in
a
safe
condition.
ACOUSTIC NOISE EMISSION:
LpA
<40
dB;
no fan
installed.
GERAeUSCHEMISSION:
LpA
c40dB;
Kein Ventilator eingebaut
MAINTENANCE DESCRIBED IN THlS SECTlON IS PERFORMED WlTH
POWER SUPPUED TO THE INSTRUMENT AND PROTECTIVE COVERS
REMOVED.
THlS MAINTENANCE SHOULD BE PERFORMED ONLY BY
QUALIFIED SERVICE PERSONNEL WHO ARE AWARE OF THE
HAZARDS INVOLVED
(FOR EXAMPLE. FlRE AND ELECTRICAL
-
----
SHOCK).
WHERE
MAIN~NANCE
CAN-BE
PERFORMED
WITHOUT
POWER APPLIED, THE INSTRUMENT SHOULD BE DISCONNECTED
FROM ITS POWER SOURCE.
WARNING
ALL PROTECTIVE EARTH TERMINALS, EXTENSION CORDS,
AUTOTRANSFORMERS, AND DEVICES CONNECTED TO THE
COUNTER MUST BE CONNECTED TO A PROTECTIVE EARTH
GROUNDED SOCKET. ANY INTERRUPTION OF THE PROTECTIVE
EARTH GROUNDING
WILL CREATE A POTENTIAL SHOCK HAZARD
THAT COULD RESULT IN PERSONAL INJURY.
WARNING
ONLY 250-VOLT FUSES OF THE SPECIFIED TYPE WlTH THE
RE-
QUIRED CURRENT RATING SHOULD BE USED. DO NOT USE
REPAIRED FUSES OR SHORT
ClRCUlTED FUSEHOLDERS. TO DO SO
COULD CAUSE A SHOCK OR
FlRE HAZARD.
8-5.
Whenever
it
is suspected that fuse protection or protective earth grounding has been defeated, the
HP
5334B
must
be
disconnected from the power lines and operation must not be allowed until the situation
is
corrected.
HP
5334B
-
Service Manual
8-1
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