BRUEL & KJAER 1019 Service Instructions Manual

BROEL
&
KJ.ER
Ncarum - Denmark Service Instructions ·
Consisting of:
Removal of the Case .
Automatic VIbration Exciter Control
Output Amplifier
Oscillator
Pick-up Amplifier
Compressor
Motor Drive Circuits
Position of Components
Parts list
Circuit Diagram
1019.1
1019 . 2
1019.3
1019.4
1019.5
1019.6
1019.7
1019.8
1019
After removing the eight HEX/HD screws on the front panel and the two screws in the bottom, it is possible to slide the chassis ond
the front panel out of the wooden case .
For rack mounting the metal case can be pulled out after the six HEX/HD screws on the side of the instrument are removed.
Troubl~
Shooting.
If the reason for a fault is not an obvious one such as a dead tube or transistor, broken down resistor, blown or disconnected fuse
etc., then first test the voltages of all the tubes and compare them with the voltages shown in the circuit diagram in order to loca-
lize the defect. Should this method of finding the fault prove unsuccessful, then check the instrument by adopting the method de-
scribed in the adjustment procedure. When the trouble has been found and remedied, the voltages and odjustmnets which are
ir~flu­
enced by the remedy must be rechecked.
The tolerances stated in the instructions can only be used as a guide for adjustment and control, but any deviations must not
be
cor-
rected 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 Monual are given purely as a guide to the service of equipment with minor faults. Some faults, as f.inst.
small deviations in tolerances require for their correction special control equipment and extensive experience, and in these cases it
is necessary to send the instrument to the factory.
Spare Parts.
Please state type and serial number of apparatus when spare parts are ordered.
Instruments necessary
for
service and repair:
Frequency Analyzer type ·21 07
Oscilloscope
Frequency Counter
M..oltimeter (50
IJA)
1019 - 4.66