Tektronix 543B Instruction Manual page 26

Maintenance — Type 543B/RM543B
found to be good to their original sockets. If the trouble is
not the result of a tube or transistor failure use the following
procedure.
f. Isolate the trouble to a portion of the circuit if possible.
2. Recheck the reaction of the front-panel controls and cali­
bration adjustments on the affected circuit.
3. Check the voltage in the circuit.
voltages are given on the schematic diagram.
4. Check waveforms in the circuit with another oscilloscope.
Typical waveforms are given on the schematic diagram.
5. Check the components in the circuit (i.e., check for faulty
capacitors, off-tolerance resistors, etc.).
Typical operating