Brüel & Kjær 2204 Service Instructions Manual

•
~ · BRUEL &
KJJER
Nrerum- Denmark
Consisting of :
Trouble Shooting:
SERVICE INSTRUCTIONS
Impulse Precision
Sound Level Meter
Checking Procedure
Power Supply
Meter Circuit
Output Amplifier
Input Amplifier
Weighting Network
Position of Components
Parts-List
Circuit Diagram
2204,1
2204,2
2204,3
2204.4
2204,5
2204,6
2204,7
2204,8
2204,9
2204
If some sort of trouble occurs with this instrument then first check the D.C. working voltages from the Power Supply.
Then use the Checking Procedure with Block Diagram in order to localize a trouble to be in one certain circuit.
When a fault has been found and remedied the voltages and adjustments which are influenced by the remedy must be
rechecked and the Checking Procedure can be used again to tell if all basic functions of the instrument are fulfilled.
The tolerance stated in the instructions can only be used as a guide for adjustment and control, but 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 equipment. 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 and Accessories necessary for service and repair :
Multimeter (50,..Al
Frequency Generator with freq. range 2-70 OOOHz. f.inst.Type 1013 and 1017
High Impedance AC voltmeter f.inst. Type 2409
Frequency Analyzer f.inst. Type 2107
Oscilloscope
Pistonphone Type 4220
2204-3.69