Tektronix P6015 - Troubleshooting: No Output; Troubleshooting: Attenuation Ratio; Troubleshooting: Compensation Failure

7. Check to see that the liquid level is approximately
even with or .062 inch above the bottom of the gold-plated
resistor end cap. If too much liquid boiled away, add more.
If the liquid level is too high, bleed off excess by loosening
the securing ring and letting the liquid boil. When the proper
level has been reached, retighten the securing ring.
8. Replace the cushion ring on the probe body, if
removed, prior to reassembling the probe body and probe
body cover.
Troubleshooting
Following are some possible trouble symptoms and
causes.
No Output or Differentiated Output.. Connect the
compensating box to the INPUT connector of the oscillo-
scope or plug-in unit and touch the probe tip to the
calibrator output connector on the oscilloscope. Set the
oscilloscope calibrator for a 100-volt output. If the crt
display shows no signal or a differentiated signal, check R6,
the center conductor of the interconnecting cable, and
R100 in the probe body. Replace the defective component.
If R100 is defective, gain access to it as outlined in steps 1
through 3 under “Recharging the Probe."
Erroneous Attenuation Ratio. If there is an obvious
error in attenuation ratio, check resistors R3, R4, and R5.
To gain access to the resistors, remove the compensating
box cover by unscrewing the two screws on the top of the
compensating box. Replace or reconnect components as
indicated by the type of trouble.
Probe Cannot Be Compensated. Check capacitors Ci,
C2, and C3. Check Resistors R1 and R2. If any of the
capacitors are shorted, the attenuation ratio of the probe
will be greatly changed. If connections to the capacitors are
faulty, or if the resistors are faulty, the defective com-
ponent will not adjust properly when compensating the
probe. Open the compensating box by unscrewing the two
screws on the top and removing the cover. Reconnect or
replace components as necessary.
l Maintenance—P6015 . _ 3-3
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