IBM 5280 Technical Newsletter page 176

Page of SY31-0600-1
As updated September 7, 1981
By TN L SN20-9656
power supply
circuit breaker location 61
connector locations 61
DC distribution 64
fuse locations 61
line plate location 61
location 3
printed circuit board
location 61
removal 75
replacement 75
removal 72
replacement 72
resonant capacitor location 61
ripple voltage level check 71
surge protector location 61
TB1 location 61
T1 location 61
voltage level check 69
wiring diagram 65
Power switch
location 1
removal 8
replacement 8
power-on checkout and IPL
printed circuit board location
printer, start-stop
adapter 268
addresses 105
addressing 274.7
attachment 274.3
attachment MPU 268
cable diagram 118.1
commands 274.4
MPU card 117
printer test 202.1
printer, twinaxial
adapter 269
addresses 1 05
addressing 271
170
22
attachment 267
attachment MPU 268
cable connector location 2
cable continuity check 106
cable diagram 117
cable polarity check 106
cable quality check 107
commands 272
activate-read 272
activate-write 273
clear 273
poll 273
read-status 273
reset 273
set-mode 273
write-control-data 273
write~ata
273
feature description 243
MPU card 116
test 193
probe, logic 161
programmable data couplers 296
programmable units
IBM 5285 240
IBM 5286 241
IBM 5288 242
372
programs 245
PRTRPOLL 177,192,202
PSN adapter 299
PT-2 line monitor 141
read~ata
command 262
read~iagnostic
command 264
read-IO command 262
recalibrate seek 262
RECFMS 356
registers, diskette adapter 264
registers, main storage 248
remote diskette drive connector location 2
remote keyboard/display connector location 2
removals
Brightness control 10
communications power supply card 74
Contrast control 10
control panel 7
data station cover 4
diskette drive 48
display assembly 30
drive-in-use indicator 11
fan 91
fan shroud 88
glare shield 29
key module 16
keyboard cover 6
key lock switch 9
logic board 89
logic card 90
logic card cover 86
MSR 118
pad printed circuit board 20
power supply 72
power supply printed cir-cuit board 75
Power switch 8
resonant capacitor
ROS patch cards
Spacebar 17
replacements
76
102
Brightness control 10
communications power supply card 74
contrast control 10
Control panel 7
data station cover 4
diskette drive 48
display assembly 30
drive-in-use indicator 11
fan 91
fan shroud 88
flyplate 19
glare shield 29
key module 16
keyboard cover 6
keylock switch 9
logic board 89
logic card 90
logic card cover 86
MSR 118
pad printed circuit board 20
power supply 72
power supply printed circuit board 75
Power switch 8
resonant capacitor 76
ROS patch cards 103
Spacebar 17