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Fujitsu M255XK Customer Engineering Manual page 37

5 1/4" mini-flexible disk drive
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Table 4-5A M255JK/54K Revision 2 Circuit Card Jumper Definitions
M255JK
M255JK
and
and
M2554K M2554K M2554K M2554K
High
Low
Dual
IBM
Density Density
Speed
PC/AT Jumper Definition
Install
Open
Open
Install
1 SP
360 RPM Only
Open
Install
Install
Open
2 SP
Motor speed and R/W circuits changed
in tandem
Install
Open
Open
Open
HD
High Density sense output
Open
Open
Install
Install
LSP
Density controlled by pin 2
**
**
**
Open
In Use LED Lit with pin 4
(X)
(X)
(X)
Open
HL
Head Load with pin 4
Install
Install
Install
Install
TD
Terminator for Drive Select
Install
Install
Install
Open
MR
Pin 34 gated with Drive Select
(*)
(*)
(*)
(*)
HM
Head Load with Motor-on
(*)
(*)
(*)
Open
HS
Head Load with Drive Select
DSO
DSO
DSO
DS1
DSO-3
Drive Select
Install
Install
Install
Install
TM
Terminator for input signal lines
Install
Install
Install
Open
RY
Ready to pi n 34
**
**
**
Open
DO
Door Switch Ready to pin 34
**
**
**
Install
DC
Disk Change to pin 34
Open
Install
Open
Open
300
Low Density 300 RPM always
Open
Open
**
Open
SM1
Densi ty and Speed Control Latched
Open
Open
**
Install
SM2
Densi ty and Speed Control Unlatched
Install
Install
Install
Open
DSR
Disk change reset with Drive Select
(*)
(*)
(*)
Install
STR
Disk change reset with step
(*)
(*)
(*)
Open
MS
Motor on with Drive Select
Install
Install
Install
Install
MM
Motor on wi th pin 16
Open
Open
Open
Open
JP3
Motor always on'
Install
Install
Install
Install
DK1
Disk-in Sensor Enabled
Open
Open
Open
Open
DK2
Disk-in Sensor and Dynamic Clamping
Disabled
Open
Install
Install
Open
DM2
FWS3 Active
Open
Open
Open
Install
DM1
FWS2 Active
**
**
**
Open
MOD
Motor-Off Delay
(*)
(*)
(*)
Open
DL
Door Lock with LD, LC, LB or LA
Open
Open
Open
Open
JP4
Undefined
Open
Open
Open
Open
JP1
No Index during Step
Open
Open
Open
Open
JP2
No Read Data during Step
**
**
**
Install
RI
Index gated with Pre Ready
Install
Install
Install
Open
DI
Index Gated with Drive Select
**
**
**
Open
LD
LED Lit with DL1 or DL2
**
**
**
Open
LC
LED Lit with Drive Select and Ready'
**
**
**
Open
LB
LED Lit with LED 0
Install
Install
Install
Install
LA
LED Lit with Drive Select
Open
Open
Open
Open
DL1
LED Lit with Drive Select
and Head Load Ready
Open
Open
Open
Open
DL2
LED Lit with Drive Select or
In-use Latch and Head Load Ready
TS-021·013087 ••• 01
4-5

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