File Control Card - IBM System/34 Maintenance Manual

23-290 FILE CONTROL CARD
Removal and Replacement
1. Set Power to 0 (operator panel).
2. Remove the 33FD from the machine (see
paragraph 23-100).
3. Loosen screw. and turn bracket 90 degrees.
4.
5.
28
Tighten the screw.
Remove the file control card.
To reinstall, reverse the above procedure. Ensure
that you reseat the card correctly in the socket
and clamping bracket.
MST
File
Control Card
23-290
File Card Pin Assignment
Name
Stepper Motor MC-O
(track 0)
Stepper Motor MC-l
(track 1)
Stepper Motor MC-2
(track 2)
Stepper Motor MC-3
(track 3)
Stepper Common
+24 Vdc
Head Magnet
+24 Vdc
- Head Load
LED Return
LED Current
Phototransistor
Return
Phototransistor
Current
Head Input
Head Input
Erase Current
Head Ground
and Shield
Preamp TPl
Preamp TP2
Ground
+ Access Oil
+ Access 1/2
+ Access 2/3
+ Access 3/4
+ Raw Read Data
+ Head Engage
+ Write Data
+ Erase Gate
+ Write Gate
+ Low Current
+ Index
+24 Vdc
+18 Vdc
+5 Vdc
-5 Vdc
Ground
Old Style
File Card
Color Test Pin
White
B03
Red D02
Yellow B04
Black B02
Blue
D05
Yellow D04
Black B05
Black D06
Yellow D07
Black D09
Yellow B08
Black B12
White B13
Red Bl0
Green B09
D12
D13
Black D08
G02
G03
G04
G05
G07
Gl0
J02
J04
J05
J06
G13
Jl0
J03
Jll
J08
New Style
File Card
Test Pin
TPB2
TPAl
TPB3
TPBl
TPAll
TPAll
TPB4
TPA2
TPB5
TPA4·
TPA5
TPA3/TPA10
TPB8
TPB9
TPB10
TPBll
TPB12
TPB13
TPA6
TPA7
TPA8
TPA9
TPB14
TPAll
TPB6
TPB7
TPA12
TPA10/TPA3
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