IBM 5280 Technical Newsletter page 174

Page of SY31-0600-1
As updated September 7,1981
8y TNL SN20-9656
feature main MPU card 58
features
communications 244
diskette drives 243
elapsed time counter 244
feature main MPU 244
keylock 243
magnetic stripe reader 244
twinaxial printer 243
start-stop printer 243
3270 emulation 244
flyplate replacement 19
focus adjustment 27
frame format, printer 272
frame format, SO LC 323
functional overview 245
functions keys 255
fuse locations 61
glare shield
location 1
removal 29
replacement 29
hard error table format 217
head resolution service aid 191
horizontal centering adjustment 25
horizontal width adjustment 25
HTPR NT 202.1
I/O data register (00) 268
I/O instructions 246
I/O registers
diskette 261
keyboard/display 253
printer 268
I/O table 247
IGS character 322
indicators, main storage 248
inhibit-control-data-AM command 264
interface testers 141
lOB pointers 248
lOBs
device 247
keyboard/display 248
partition 247
100 register 253
100B register 253,268
lOS register 253, 268
IPL 59,170
IPL diskette 245
IWRAP 202.1
370
jumpers
communications MPU card 123
attenuator 123
OOSA 133
EIA/CCITT 123
ROS patch 123
2-wire or 4-wire selection 123
line plate 134
key module
removal 16
replacement 16
keyboard
break code service check 13
cable diagram 40
cleaning 16
connector J01 location 12
connector J02 location 12
connector J03 location 12
connector P101 location 12
cover removal 6
cover replacement 6
description of 257
flyplate replacement 19
. key module removal 16
key module replacement 16
layout 14
location
logic card location 12
MPU card 33
pad printed circuit board location 12
scan codes 14
Spacebar removal 17
Spacebar replacement 17
speaker location 12
storage card 35
keyboard adapter 253
keyboard logic card location 12
keyboard scan code test 193
keyboard/display
attachment 252
data flow 254
MPU 246
storage 256
storage accessing 257
storage addressing 256
keyboard/display MPU card 33
keylock
cable diagram 47
feature description 243
location 1, 3
switch removal 9
switch replacement 9
line adapter cards 287
line filter
removal 77
replacement 77