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Ta .... 8·1. Disc DrIve Troubl .... o ... ' .ncI R...., (Continued)
.....
1 G. Check pin 31 of UlS for a 125 ns wide
pulse.
11. Check pin
29
of UlS for a
250
ns wide
pulse.
12. Rerun the disc drive test.
I
Incllad. Action
The waveform should appear as follows:
'It"
·'1.0
..., . . . .
La
.
•
•
..
~
U
the pulsewidth
is
not in the range 119 to 131
ns, adjust R44 on the logic B PCA.
The waveform should appear as follows:
.,. - t.. ..., ... -
0 ••
If the pulsewidth
is
not in the range 238 to 262
115,
adjust R45 on the logic B PCA.
If an error message appears, replace the logic B
PCA.
.
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