NEC D2246 Maintenance Manual page 59

8-inch winchester disk drive
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TP1
RV4
TP9
GO D
DD
DO
D
CJ
c:s
CJ
~
D
c ]
c::::J 0 c::::J
0:
r=:::3
0
TP7
C]
CJ c::::J
C]
CJ
D O D
c:s
c=:J c::==3
r---............ _
RV1
0
...
CJ
o
D
Figure 5-1 Servo Offset and Seek Speed Adjustment Test Points
. , /
SIGNAL LEVEL (TP7)
1
--
GRD (OV)
- - - + - - - -
.
TP3
' "
I
AT CYLINDER
0
AT CYLINDER 691
ADJUST RV4S0THATV
O
=V
691
~O.25V
___
...l
Figure 5-2 Servo Offset Waveform
TP1-5
+V
I
OV--~
....
1 ..
1 - - - -
T
~I
41 ms
~
T
~
43 ms
Figure 5-3 Seek Speed Waveform
5-2

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