General Maintenance
4- 20
WFM6100, WFM7000, and WFM7100 With Option FP Service Manual
Perform the following tests to isolate the problem to one board or the other.
If the advanced diagnostics detect an error in the lissajous circuitry, then it will
display a failure in one of the following categories:
H
Lissajous Frequency:
should be 61.44 MHz
±
0.05 MHz.
H
Lissajous Bus V2:
pass/fail
1.
If there are any failures, prepare a test oscilloscope with the following
settings:
H
Vertical Scale
2.00 V/div
H
Horizontal Scale
200 ns/div
2.
If there is Lissajous Frequency failure, perform the following substeps:
a.
Put the oscilloscope probe on pin B3 of connector J641 on the Audio
board. Verify the signal is ~3 V
p--p
and is a continuous 50% duty-cycle
squarewave.
b.
If the signal at J641 is not as just described in step a, the Audio board
most likely has a failure; otherwise, replace the Main board.
3.
If there is a Lissajous Bus V2 failure, perform these substeps:
a.
Put the scope probe on connector J641 pin B2 of the Audio board and
verify the signal is ~3 V
p--p
and toggles low at regular intervals.
b.
If the signal on pin B2 looks OK, put the scope probe on pin B4. Pin B4
is the data line and the signal will have a somewhat random look
depending on the audio source. Just verify that the signal is toggling and
is ~3 V
p--p
.
c.
If either signal looks bad at J641 the Audio board most likely has a
failure, otherwise replace the Main board.
The EYE/PHY functions depend on the EYE and Main boards, and the
interconnections between them.
Major Operational or Diagnostic Failure
H
Check that the 110 pin CPCI connector between the Eye and Main boards, is
correctly seated and secure.
H
Check that the ribbon cable from the Eye board to the main board is securely
plugged into J5 on the eye board and J16 on the Main board.
Option EYE/PHY
Troubleshooting
Содержание WFM6100 Opt. MB
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Страница 64: ...Repackaging Instructions 4 34 WFM6100 WFM7000 and WFM7100 With Option FP Service Manual ...
Страница 76: ...Replaceable Parts 5 12 WFM6100 WFM7000 and WFM7100 With Option FP Service Manual ...