IBM 6580 Product Support Manual page 84

-78-
CABLES, CONNECTORS, AND TEST POINTS - Figure 29
Diskette Unit Connectors B3 and B4.
Note: All connectors are shown from the wiring side.
B3/B4
File Card Pin Identification
1 B04
Index Pulse
2 B05
Diskette Sense
3 B06
Write Erase Enable
4 B07
File Data
5 AOl
-5.0VDC
6
A18 Drive Present
7 A12 Signal Ground
8 B16 Inner .Tracks
9 B09 Erase Gate
10
-
-
.
11
B14 Write Gate
12 BOO
+24.0VDC
13 Bl0 Access 0
14 BOl +5.0VDC
15 B13 Access 1
16 Bll Switch Filter
17 B15
Head Engage
18 B08 Inner Tracks
19 A02 Signal Ground
20 A03
Sianal Ground
21
B17 Write Data
22
-
-
23
- -
?4 AlB
Twisted Pair Ground
DISKETTE UNIT
I
LEFT DRIVE
I
File Control
I I
rr-
Card
I
U
8
I
r-----,
9
I
r -
J ,
r--------
I
RIGHT I File I I
D~4j
10
I
DRIVE
I
Control
I
r
j n
R3
Diskette Unit
I
(OPTIONAL)
I
Card
I
Diskette...L
II
DC Cable
I L - ..,
.J Adapter Card
lliL
~
11
L ____
-1
DBl
B3,B4
~~-~;ro
13 24
File Control Card Connector
AOl
10000000000000000001
A18
BOl
0 . 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 OJ
B18
POWER SUPPLY