Fujitsu M255XK Customer Engineering Manual page 38

DM1DM2
I . • ,
~
OSRSTR
PCI AT CONFIGURATION CFDCED)
0
0
0
~K
0
• • HS ~
HM
i:
i=
i
D '
i~
RI
c:=:J
FG
Table 4-58 M2553K RevisiQll 3 Circuit Card
Jumper Definitions
M2553K
IBM PC/AT Jumper Definition
Open MS
Motor on with Drive Select
Shorted
MM Motor on with pin 16
DS1 DSO-3 Drive Select
Install TM Terminator for input signal lines
Shorted SM2
Density and Speed Control Unlatched
Open SM1 Densi ty and Speed Control Latched
Open RY Ready to pin 34
Shorted DC Disk Change to pin 34
Shorted RI Index gated with Pre Ready
Open DI Index gated with Drive Select
Open FG Frame Ground
Open HL Head Load with pin 4
Open HS
Head Load with Select
Shorted HM
Head Load with pin 16
Open 2 SP Motor speed and R/W circuits changed in tandem
Shorted 1 SP 360 RPM Only
Open DSR Disk change with Drive Select
Shorted
STR
Disk change reset with step
Open DM2
FWS3 Active
Shorted DM1 FWS2 Active
TS-021-0130B7 ••• 01
4-6
OS3
OS2
DS1
OSO
TM