General Maintenance
WVR610A & WVR611A Waveform Rasterizers Service Manual
6- 17
If there is an audio POST failure indicated by either the Power-Up Diagnostics
or the fault LEDs on the audio board (DS360 or DS0460), perform the following
procedure to narrow the problem to either the audio board or the main board.
1.
Prepare a test oscilloscope with the following settings:
H
Horizontal Scale
5.00
µ
s/div
H
Vertical Scale
2.00 V/div
2.
If the Power--Up Diagnostics screen reports
Audio DSP Self Test – 10
.
a.
Check the FPGA programmed indicator (DS0430 on the audio board). If
this LED is off, proceed to step c; otherwise probe pin 34 of connector
J750 of the main board during boot-up. If the signal on the pin toggles,
replace the main board, otherwise check pin 34 of J400 on the audio
board. If signal toggles on pin 34, replace the cable; otherwise replace
the audio board.
b.
Probe pin 33 of J750 on the main board during the boot-up sequence. If
the signal does not exhibit a low to high transition, replace the main
board. If the signal does toggle, check pin 33 of J400 on the audio board.
If the signal doesn’t toggle on pin 33, replace the cable.
c.
Probe pins 31 and 32 of connector J750 during the boot-up sequence. If
the signal on either of these pins doesn’t toggle, replace the main board.
If they do, probe pins 31 and 32 on the audio board. If the signal doesn’t
toggle on either pin, suspect the cable.
d.
Probe pin 30 of J400 on the audio board during the boot-up sequence. If
the signal does not exhibit a low to high transition, replace the audio
board. If it does, check pin 30 of connector J750 on the main board. If
the signal on pin 30 doesn’t toggle, suspect the cable; if the signal on pin
30 does toggle, suspect the audio board.
3.
If the Power-Up Diagnostics screen reports
Audio DSP Self Test – 1
,
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 step c.
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 do not, replace the
main board. If they all do, check them again on the audio board J400. 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 don’t, suspect the main board. If they do,
Summary of Contents for WVR610A
Page 4: ......
Page 14: ...Table of Contents x WVR610A WVR611A Waveform Rasterizers Service Manual...
Page 18: ...Service Safety Summary xiv WVR610A WVR611A Waveform Rasterizers Service Manual...
Page 22: ...Preface xviii WVR610A WVR611A Waveform Rasterizers Service Manual...
Page 23: ...Specifications...
Page 24: ......
Page 53: ...Operating Information...
Page 54: ......
Page 90: ...Operating Basics 2 36 WVR610A WVR611A Waveform Rasterizers Service Manual...
Page 132: ...Changing Instrument Settings 2 78 WVR610A WVR611A Waveform Rasterizers Service Manual...
Page 139: ...Theory of Operation...
Page 140: ......
Page 147: ...Performance Verification...
Page 148: ......
Page 201: ...Adjustment Procedures...
Page 202: ......
Page 204: ...Adjustments 5 2 WVR610A WVR611A Waveform Rasterizers Service Manual...
Page 205: ...Maintenance...
Page 206: ......
Page 228: ...Repackaging Instructions 6 22 WVR610A WVR611A Waveform Rasterizers Service Manual...
Page 229: ...Options...
Page 230: ......
Page 234: ...Options and Accessories 7 4 WVR610A WVR611A Waveform Rasterizers Service Manual...
Page 235: ...Diagrams...
Page 236: ......
Page 243: ...Replaceable Electrical Parts...
Page 244: ......
Page 246: ...Electrical Parts List 9 2 WVR610A WVR611A Waveform Rasterizers Service Manual...
Page 247: ...Replaceable Mechanical Parts...
Page 248: ......