Toshiba T3200 User Manual page 9

1.5.1 Jumper straps
The Hard disk control PCB has jumper straps which are PJ 3, PJ 4
and PJ 5.
Functions of the jumper straps are as follows.
(1)
PJ 3
Not used.
(2)
PJ
4
This jumper straps select recording method of the hard
disk control PCB.
The following table shows function.
TABLE 1-6 PJ 4 Jumper Strap Functions
No. Status Function
1-2 Short MFM method
3-4 Open
( 3)
PJ 5
This jumper straps select the delay time of the hard
disk control PCB.
Usually delay time is selected as 20 ns.
The following table shows function of the jumper
straps.
TABLE 1-7 PJ 5 Jumper Strap Functions
No.
Delay time select
1-2
10 ns
3-4
15 ns
5-6
20 ns
7-8
25 ns
9-10
30 ns
1-9