Tektronix WVR6020 Service Manual

General Maintenance
3. If the Diagnost
ic Log screen reports the failure Audio DSP Self Test—dsp0,
perform the following procedure:
a. Check to see if the audio board is recognized by the main board by
pressing CONFIG and selecting Utilities > View HW/SW Version.
b. If there is an audio option listed, suspect the audio board; otherwise,
proceed to next s tep.
c. Probe pins 3 through 14 on the main board connector J750, and verify
that the signals on all pins are toggling. If any signals are not toggling,
replace the main board. If they all are toggling, check them again on the
audio board J200. If any of the signals do not toggle on the audio board,
replace the cable.
d. Probe pins 15 and 18 on connector J750 during boot-up and verify that the
signals toggle. If they are not toggling, suspect the main board. If they are
toggling, check them again on the audio board J200. If either of the signals
on pins 15 and 18 do not toggle on the audio board, replace the cable.
e. Probe pin 25 on the audio board connector J200 during the boot sequence.
If the signal does not toggle, replace the a udio board; otherwise, check it
again on the main board at connector J750. If the signal on p in 25 does
not toggle on the main board, then replace the cable; otherwise, replace
the main board.
f. I f all of these steps pass, replace the audio board.
4. If the Diagnostics Log reports the failure Audio DSP Self Test—dsp1,
perform the following procedure:
Check to see if surround display is functioning correctly by doing the
following.
a. Push the factory button, and then push and hold the display select #4
button.
b. In the audio pop-up menu, select Aux Display>Surround Display.
c. Also in the pop-up menu, select Audio Input> AES A.
d. Hook up an AES test tone generator to the AES A1-2 input.
5. If there is nothing displayed o n the surround display, proceed to next s tep;
otherwise, replace the audio board.
6. Probe pins 3 through 14 on the main board connector J750, and verify that the
signals on all the pins are toggling. If any of the signals on pins 3 through 14
do not toggle, replace the main board. If they all do toggle, check them again
on the audio b oard J200. If any of the signals on the pins do not toggle on
the audio board, replace the cable.
7. Probe pins 15 and 20 on connector J750 during the boot sequence, and verify
that the signals on the pins toggle. If they do not toggle, suspect the main
WVR6020, WVR7020, and WVR7120 Waveform Rasterizers Service Manual 4–19

Tektronix WVR6020 Specifications

General

Brand	Tektronix
Model	WVR6020
Category	Measuring Instruments
Language	English