Tektronix TCPA300 SERIES, Instruction Manual

Page: 180 / 205

Isolating Hardware Faults
7- 22
TCPA300/400 Amplifiers and TCP300/400 Series Current Probes Instruction Manual
Table 7- 4:
Probe h
ardware faults
Symptom Possible Cause Repair Action
Probe Open LED stays continuously lit,
even with the probe slider closed. Open coil in probe. Substitute probe with another probe or
the Calibration Adapter -- if the Probe
Open LED goes out , coil is open -- repair
bad connection or replace coil
Determining the Amplifier Firmware Version Number
If you are having a problem with your amplifier, it may be helpful to know the
version of firmware that is in the amplifier. The firmware version may help the
Technical Support Center to isolate the amplifier symptoms to a specific cause.
To determine the amplifier firmware version number, do the following:
1. Turn the amplifier power off.
2.
Press and hold the COUPLING button.
3. Turn the amplifier power on.
After the power-on LED sequence, the LEDs on the far-left side of the front
panel show a binary representation of the firmware version number. The
firmware version number is the sum of the values for the lit LEDs. See
Figure 7--18 for the values each LED represent.
32
16
8
4
2
1
Hold down
during
power-on
Binary
value
Figure 7- 18: Displaying the amplifier firmware version number
For example, if the NONCOMPATIBLE PROBE TYPE LED is lit, the firmware
version number is 1.