IBM 3279 2A Maintenance Information page 200

test pattern
color interactive test 2-6
test mode 1 2- 3
test 0 2-6, 2-7
test 3 2-10
test points
'horizontal sync' singal 1-4
'skip' signal 1-4
amplifier card 6-27
video card 6-27
voltage 1-6
test procedure, interactive tests 2-6
test programmed symbols 2-10
test 0 routines 2-6
test 1
test 3
test 4
test 8
testing
2-9
2-10
2-10
2-10
audible alarm 2-6
character attributes
magnetic reader control
2-11
2-8
ports. control unit 2-10
text keyboard, jumpering 6-28
tolerances, voltage 5-2
tools 1-10
top card connectors
identification 1-5
locations 1-8
pin numbers 1-8
wiring 6-5
top card identification 1-8
top cover, keyboard, removal 4-11
transformer
line output 3-2
power 3-2
transmission of data 3-9
triads 3-7
triple fonts
3-13
tube and coil assembly 3-6
type identification, keyboard 1-9
typewriter keyboard, jumpering 6-28
video card 3-6
adjustments 5-1
grounding 6-18
!Qcation 1-7
.. removal 4-7
test points 6-27
video components, removal 4-7
video control switch \-3, 1-5, 6-31
3279 MIM
video output facility 3-9
cabling 6-31
description 1-3
logic card 1-8
output sockets 1-5, 6-31
voltages
initial check 5-2
power supply card 5-2
ripple 5-2
test points 1-6
tolerances 5-2
volume control audible alarm 1-2
warning notices
5-1
waveforms
6-2
'dot 0' signal, 6-4
'frame sync' signal. 6-4, 6"5
'horizontal retrace' signal. 6-2
'horizontal sync' signal 6-2
'skip' signal 6-5
'videotime' signal. 6-4
'14Mhz clock' signal 6-2
'7 x trig' signal. 6-4
badly converged screen, 6-3
clock 6-2
convergence parabola 6-3
indicator row signal. 6-4
main oscillator
6-2
weight 1-3
wrench, keylock 1- 1 0
+5
V
supply, test point 1-4
+6.3 V supply, test point 1-4
+8.5 V supply, test point 1-4
+ 70
V
supply, test point 1-4
+ 103
V
supply, test point 1-4
'dot 0' signal, waveform 6-4
'feature clock' signal _ 6-2, 6-5
'force blue', jumpering 2-14
'force chars', jumpering 2-14
'force green', jumpering
2-14
'force red', jumpering 2-14
'force white', jumpering 2-14
'frame sync' signal, waveform 6-4, 6-5
'green video' signal 6-25, 6-27
<horizontal retrace' signal. waveform 6-2
'horizontal sync' signal 6-2
waveform 6-2
test point
'red video' signal
'row 0' signal
1-4
6-25
6-5
Index X-7