IBM 3274 51C Maintenance Information page 238

31 SO Control Card
4 t
~
PTXCP
SA
00 1
o
00
00
00
00
00
00
00
00 I/O CP
00
00
00
1)0
00
00
00
0018
~ 5VdC ~
LED :
...
o TPBDt
D
TPAD10
TPCD40
0
0 oTPC01
oTPD01
. TPED3 0
0
0 TPED1
TPF02 0 TPF01
TPG02
0
TPH05 0
+ Index
...
---~
..... - Probe:
TPE03 (+index)
PTX
1.0 V/cm
~
+5Vdc
I
LED
b:
\
'
~ 5VdC
"
LED :
...
1.0 V/cm
I
~
.
e
.I~
20 ms/cm
~
____ Probe:
TPEOl (+index)
PTX
It--·
~--e-----.(.Il--G
Figure E-36. Diskette Speed
20 ms/cm
t
o
Oscilloscope Settings .
Channel A sweep mode
Channel A level
Channel A coupling
Channel A slope
Channel A source
Trigger
Mode
Channel 1 volts/division
Channel
1
input
Times per division
Channell probe to
Normal
+
DC
+
Internal
Normal
Channel 1
1.0
V/cm
DC .
20
ms
+Index Test Pin
Appendix E. IBM 318D Diskette Drive Maintenance E-49