
BROEL
&
KJJfR
Ncerum -Denmark
Consisting of:
Removal of Metal Case
Service Instructions
Motion
Analyzer
Block Diagram 4911 .1
Electronic Section 4911 .2
Position of Components 4911.3
Parts List 4911.4
Circuit Diagram 4911 .5
4911
After removing the
two
threaded retainers
at
the
back of
the
instrument, it
is
possible
to
slide
the
chassis and the front panel
out
of the case.
Trouble Shooting
If any problems should occur with this instrument, then first check the
DC
working voltages from the Power Supply. Then use
the
Block Diagram
in
order
to
localize the trouble
to
be located
in
one specific circuit.
When a fault has been found and corrected,
the
voltages and adjustment which are influenzed by the correctiO(l must be
rechecked, and the instrument controlled to see
if
all basic functions are fulfilled.
The tolerances stated
in
the instructions can only be used
as
a guide for adjustment and control.
Any deviations must
not
be corrected without being sure,
that
the tolerances, of the instruments used for making the adjustment,
are so small
as
to
have
no
influence on
the
measurements.
The instructions
in
this Manual are given purely as a guide
to
the service of the equipment. Some faults e.g. small deviations
in
tolerances, require special control equipment and extensive experience
to
correct.
For
these cases the instrument must be sent
to
the
factory.
Voltages
at
various points throughout
the
apparatus are indicated on the circuit diagram and the simplified diagram
in
the
service
instruction. These voltages are typical nominals only and, with the exception
of
stabilized power supply voltages, may vary
considerably from apparatus
to
apparatus.
Attention
All
main capacitors C 1 - C 6 should be discharged by shorting directly across
the
tags rather than
to
the
chassis, because this
would cause a breakdown
of
V 112 and V
113
.
Spare Parts
Please state type and serial number
of
apparatus when spare parts are ordered.
4911-6.78