BRUEL & KJAER 1024 Service Instructions Manual

BROEL
&
KJ.ER
NC2rum - Denmark
Service Instructions
Sine - Random Generator
Consisting of:
tv'.eter Circuit
Output Amplifier
Oscillator
Compressor
Position of Components
Parts Li st
Circuit Diagram
Removal of the !Vetal Case
1024.1
1024.2
1024.3
1024.4
1024 . 5
1024 .6
1024.7
1024
After removing the four threaded retainers at the back of the instrument, it is possible to slide the chassis and the front ponel out
of the case.
Troub le Shooting
If the reason for a fault is not an obvi ous one suc h as a dead tvbe, broken down resistor, blown or disconnected fuse etc., then
first test the vo ltages of all the tubes and compare them with the voltages shown in the circuit diagram in order to localize the
defect. Should this method of finding the fault prove unsuccessful, then check the instrument by adopting the method described in
the adjustment procedure . When the trouble has bee n found and remedied, the voltages and adjustments which are influenced by
the remedy must be rechecked.
The tolerances stated in the instructions can anly be used as a guide for adjustment and control, but any deviations must not be
corrected withou t being sure that the tolerances of the instruments used for making the ad justment are so small as to have no in-
fluence on the mea$urements .
The instructions in this tv\anual 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
~nd
the instrument to the factor y .
~
Please state type and serial number of apparatus when spare parts are ordered .
Instruments necessary for service and repair
Multimeter (SO
~)
Frequency Analyzer Type 2107
(Frequency counter or a frequency standard and a service oscilloscope)
(Vacuum Tube Voltmeter Type 2409)
(Frequency and Distortion .v.easuring BrJdge Type 1607)
1024-165